Onkyo Icon Series P-80 pre amplifier

Icon Series P-80 Network Preamplifier

 

The Icon Series

Is not only a complete renewal of Onkyo’s previous hi-hi products, but also the culmination of Onkyo’s accumulated and continuously evolving sound creation technologies and was developed to become the icon of the Onkyo brand.

 

Quality is King, and Sublime Sound is The Decree

Thanks to patented DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry), the P-80 Network Preamplifier delivers a vivid yet smooth and comfortable sound from any music source. DIDRC is a discrete signal control circuit developed to make digital sound sources such as CDs and music streaming services sound as natural as analog records. This technology has been further refined and is used in the P-80’s the analog filter of the DAC and phono amplifier circuits.

 

Input Your Gear, Connect To Your Music

Hardwire your turntable, plug in your CD player, and stream your songs with ease thanks to the Onkyo P-80’s many connectivity options. With 3 pairs of RCA analog inputs, MM/MC phono, coax, optical, USB-A (Storage Playback) and headphone inputs, you have all the flexibility your music devices need to move you.

 

Onkyo Invests in Your Modern Lifestyle

Your carefully curated playlists play well with the Onkyo P-80 Network Preamplifier. Seamlessly hardwire or cast your content from any of the following built-in platforms: Spotify Connect, TIDAL Connect, Qobuz Connectt, Amazon Music, Qplay, TuneIn, Works with AirPlay 2, Chromecast, Roon Ready

 

From Onkyo Academy: The Benefits of a Preamplifier

A preamplifier receives the signal input from your device (music source), and applies tone controls to that signal. You have more control over your audio playback in terms of bass, treble, volume, and more. When Fidelity IQ (Auto Loudness function) is turned on, the system automatically provides optimal audio playback according to any volume in conjunction with the master volume (This function operates independently of Tone Control and can be used in conjunction with Tone Control / Parameters are generated for the viewing environment using the setup microphone during initial setup). This Fidelity IQ goes beyond correcting loudness characteristics. Onkyo’s sound quality engineers adjust the frequency response to provide the most emotional sound possible, regardless of the music genre. Select your source, tweak settings to your liking – which may vary depending on the speakers you listen through, the type of audio being played, the genre of music, etc. – and customize the experience accordingly.

 

Dirac Live For The  Discerning Listener

Onkyo builds world-class products for early adaptors and tech enthusiasts. It’s what sets us apart from the rest, and the P-80 Network Preamplifier is no exception to our commitment to impress. That’s why it comes with built-in Dirac Live Room Correction. With frequency response correction (500 Hz - 20 kHz / full version is option), multiple playback modes, and more, this highly sought feature will elevate your listening experience by taking your unique system and room setup into account.

 

Specifications

Pre Amplifier Channel:   2,2 Ch

Frequency Response:  5 Hz ~ 100 kHz (+1/-3 dB)

Tone Controls

Bass :   ±10dB at 100 hz

Treble :  ±10dB at 10  kHz

Analog Audio Input:  RCA (Unbalanced) 3 Pair

Digital Audio Input:   HDMI ARC, COAX, Optical, USB-A (Storage playback)

Phono Input:  1 Pair (MM/MC)

Audio Pre Output
RCA (Unbalanced) 1 Pair

XLR (Balanced) 1 Pair

Subwoofer Output:  RCA (Preout) x 2

Headphone Output:  1/4” (6,3 mm) Jack

Setup MIC Input:  1/8” (3,5 mm) Jack

12V TRIGER Output:  1/8” (3,5 mm) Jack

Network Connectivity:  Wi-Fi, LAN; BLUETOOTH SBC, aptX, aptX HD

Network Service:  Spotify Connect, TIDAL Connect, Amazon Music, Qobuz Connect, QQ Music, Tune In, Roon Ready

Room Calibration:  Dirac Live® Room Correction

Power Consumption:  35 W, 30 W (idle), Less than 0,3 W (Standby

Dimensions (W X H X D):  435 x 135 x 355 mm (17.1” x 5.3” x 14”)

Weight:  12,0  kg

 

Onkyo Icon Series M-80 power amplifier

Icon Series M-80 Power Amplifier

 

Refined Style You Can Feel

Just as your favorite music resonates on an emotional level, premium design is felt instinctively. Intuitively. The Onkyo Icon Series is meticulously designed for simplicity and balance, blending an elegant form factor with classic hi-fi details. Carefully selected materials and tactile buttons and knobs elevate the user experience to something greater than the sum of its parts.

 

Superior Sound Starts with Onkyo

Sophisticated circuitry, elevated design choices, and next-generation tech are weaved into every millimeter of Onkyo’s new Icon Series. Our dedicated engineers believe everyone deserves an exceptional listening experience with all the nuance, detail, and emotion that the artists or players intended. The content played through any of our Icon Series products isn’t just heard – it’s felt.

 

Powering The Music That Moves You

The M-80 uses a three-stage Inverted Darlington Amplifier. The three-stage Inverted Darlington Amplifier has a very low output impedance and drives speakers powerfully with a large current. Also, by keeping NFB (Negative Feedback) low, it is not affected by noise from the speaker. It offers a powerful yet highly resolving and informative sound. The M-80’s output stage transistors are in parallel configuration, which provides excellent instantaneous current supply capability, further enhancing the rise of sound and the sense of power. The driver stage of the M-80 amplifier uses DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry). Reducing beats generated signals(noise) in the ultra-high frequency band by DIDRC’s high slew rate designand helps produce the natural sound of an analog record.

 

Cutting Edge Compomentry for Captivating Playback
The M-80 housing consists of two aluminum side panels and a steel top panel. The three-piece construction of the housings increases rigidity and improves seismic resistance. Various vibrations are suppressed and sound quality is improved.

 

Create Your Perfect System

The M-80 has an output power of 130w(FTC, 8Ω, 20Hz - 20kHz, THD 1%, 2ch driven) / 200w(4Ω, 1kHz, THD 0.7%, 2ch driven) which allows it to powerfully drive large speakers and bring you dynamic acoustic information. For example, Klipsch Forte speakers paired with the P-80 and M-80 would maximize the dynamic and extended sound of the Forte.

 

From Onkyo Academy: The Benefits Of A Power Amplifier

A power amplifier receives the signal from your pre-amp and literally powers it into your speakers. Think of your pre-amp as a brain, and your power amplifier as the muscle. Separating your amplifiers into pre- and power gives you ultimate flexibility in audio playback. Since they are not affected by each other’s circuits, they can provide high-resolution sound quality through even cleaner signal transmission. Audiophiles are well-known to prefer specific power amps and the way they impact sound quality and coloration. The M-80 is a power amplifier that reproduces the full range of artists or players’ intentions in their music and drives you into a world of emotion.

 

Specifications

Output Power:

130 W (FTC 8 Ω, 20 Hz - 20 kHz, THD 1%, 2-ch driven)

200 W (4 Ω, 1 kHz, THD 0.7%, 2-ch driven)

Amplifier Channel:  2 Ch

Amplifier Type:  Class AB

Frequency Response:  5 Hz ~ 100 kHz (+1/-3 dB)

Speaker Impedance:  4 - 16 Ω

Analog Audio Input
RCA (Unbalanced) x 1pair

XLR (Balanced) x 1pair

12 V TRIGER Input (1/8” (3.5 mm) Jack)

Power Consumption: 445 W, 51 W (idle), Less than 0.3 W (Standby)

Dimensions (W X H X D):  435 x 135 x 345 mm (17.1” x 5.3” x 13.6”)

Weight:  13.5 kg

Finish:  Black or silver

 

Onkyo Model 732 amplifier

Model 732 with newly discovered amplifier design

Amplify the input signal without any distortion. This is the most fundamental theme that runs through all efforts when designing an amplifier. But what is distortion and how is it produced? If these questions are not answered it is impossible to create a really excellent amplifier. Of course, every amplifier is designed to reduce distortion. In an ordinary amplifier the distortion is measured by feeding a sine wave into the amplifier. However, this wave form is very rare in real music. Usually live music has many loud and abrupt sounds. They are an integral part of good music but it is this very dynamic sound that causes much distortion due to the poor transient response of many amplifiers. Even if an amplifier has a Total Harmonic Distortion of, for example 0,01% at 1 kHz it does not mean that this amplifier can reproduce music with low distortion. If we consider the "live signal" we find it very complicated and man, without some help cannot analyse it very satisfactorily. That is the reason Onkyo resorted to electronic computer technology to analyse each signal. This computer technology was combined with extensive listening tests in an effort to discover just what distortion is and how it is caused. The result of this research enabled Onkyo to establish a new method for the design of an amplifier. Consequently, model 732 has precise equalization, big phono overload capacity, direct coupling, differential amplifier and pure complementary SEPP circuitry.

 

Equalizer Stage

Transient response is a problem left unsolved by many preamplifiers because their calculations depend on the input being a sine wave. However, this simple wave is quite different from the complex signal produced by live music. As is well known, live music contains many very abrupt and impulsive sounds and has an unbelievably wide dynamic range. The dynamic signal causes distortion in all circuits and must be taken into consideration when designing equipment.

This means that model 732's reproduction is faithful to the original music because it avoids the distortion caused by poor transient response. CAD (Computer Aided Design) is used in model 732 because it is impossible to analyse dynamic music signals with ordinary measuring instruments. By comparing extensive listening tests and the measurements of computers Onkyo was able to discover just what the distortion was and through this research established a new method of designing an amplifier.

In a preamplifier precise equalization is extremely important. To avoid distortion that is caused by saturation in this equalizer stage model 732 has a big phono overload capacity of 320 mV at 1 kHz and 1500 mV at 10 kHz.  The phono overload capacity gets larger with the rise in frequency so that it is the same as that of the RIAA equalization curve. RIAA deflection is ±0,5 dB from 30 to 15,000 Hz. The Signal-to-Noise Ratio is better than 75 dB

 

Power Amplifier Section

An unbelievable amount of effort has been expended in an endeavour to reduce distortion of any kind in the amplifier section of model 732. for this purpose model 732 has pure complementary SEPP, direct coupled and differential amplifier circuitry. The power amplifier circuitry was analysed by a computer but this analysis was not restricted to the audible range. It was extended beyond that range because live music contains many signals in this inaudible range. Onkyo found that the very low frequencies have a very important bearing on the music even though they cannot be heard. Ordinary amplifiers that do not take these very low frequencies into consideration cause a lot of distortion because this disturbance in the very low frequencies causes Intermodulation DIstortion throughout the whole range of the signal. The statistics for this amplifier are very impressive. It is capable of delivering a continuous power output of 56 watts per channel at 8 ohms. The distortion of model 732 is rated at less than 0,02% at 10 watts, 1 kHz. The same low rate of distortion is maintained regardless of whether model 732 is used at full power or played very softly.

The use of a differential amplifier means that this model is extremely stable. Instability in an amplifier will put DC voltage on the loudspeaker terminals and this will lead to distortion . Fluctuations in the power supply.

 

Specifications

Type:  All Silicon Transistor Integrated Stereo Pre-Main Amplifier

Circuit:  Direct-Coupling and Differential Amplifier, Pure-Complementary SEPP System

Semiconductors:  54 Transistors; 20 Diode; 2 Thermistor; 4 Posistor

Main Amplifier (8 Ω  load in case of no indication)

Dynamic Power: 

150 W at 8 Ω  IHF

200 W at 4 Ω  IHF

RMS Continuous Power (Both Channel Driven)

56 W + 56 W at 8 Ω  (1 kHz)

68 W+ 68 W at 4 Ω  (1 kHz)

Total Harmonic Distortion

Less than0,1% at rated output 1 kHz

Less than 0,03% at 0,5 W output 1khz

Less than 0,03% at 10 W output 1 kHz

Intermodulation DIstortion (SMPTE 70 Hz ; 7 kHz = 4 : 1)

Less than 0,05% at 34 W output

Frequency Characteristic :  10 Hz - 80 kHz (+0 -1 dB at normal output)

Power Bandwidth:  10 Hz - 100 kHz (IHF -3 dB, T.H.D. 0,2%)

Signal-to-Noise Ratio:  better than 110 dB (IHF A Network Shunt)

Damping Factor:  100 (DC - 20 kHz)

Load Impedance:  4 ihm - 16 Ω

Input Impedance:  100 k Ω  (10 Hz - 50 kHz)

Gain:  27 dB

Rated Input Voltage:  1 V

Input/Output Characteristics:  in-phase

Output Terminal:

Speaker:  A, B, C, A + B

Headphone

Pre-Amplifier

Input Sensitivity/Impedance

Phono 1 (1,03 kHz) :  2,0 mV / 50 k Ω , 30 k Ω

Phono 2  (MM) :  2,0 mV/ 50 k Ω

Phono 2 (MC) :  83 µV / 80 k Ω

Mic :  1,8 mV / 50 k Ω

Tuner, Aux 1, 2 Play :  100 mV / 100 k Ω

Total Harmonic Distortion :  less than 0,05% (at 1 V output, 1 kHz)

Intermodulation DIstortion : less than 0,05% (at 1 V output, 1 kHz)

Frequency Response

Phono 1, 2 :  30 Hz - 15,000 Hz (±0,5 dB)

Tuner, Aux 1, 2 Play :  10 Hz - 70,000 Hz (+0 -1 dB)

Max. Allowable Input Phono

MM :  320 mV (1 kHz), 1500 mV (10 kHz ) rms

MC :  13 mV (1 kHz), 60 mV (10 kHz) rms

Signal-to-Noise Ratio (IHF A Network Input Shunt)

Phono 1 :  better than 75 dB

Phono 2 (MM) :  better than 75 dB

Phono 2 (MC) :  better than 55 dB

Mic:  better than 69 dB

Tuner, Aux 1, 2 Play:  better than 90 dB

Output Voltage:

Pre-Out 1, 2 (100 k Ω  at load) :  1 V (Rated output); 4 V (Max. Output)

Output  Impedance:

Pre-Out 1, 2 :  2,2 k Ω

Tone Controls (2 dB/step Switch Type)

Treble :  ±10 dB at 100 kHz, 30 kHz

Bass :  ±10 dB at 100 Hz, 30 Hz

Turnover Frequency

Treble :  2,5 kHz, 8 kHz

Bass ;  400 Hz, 125 Hz

Filter

High Filte (-3 dB) :  7 kHz 12 dB/oct

Low Filter (-3 dB) :  70 Hz 12 dB/oct

Muting:  -20 dB

Loudness :  VR -30 dB , 6 dB (at 100 Hz)

Transient Killer Operation Time

When SW is turned On :  3 sec

When SW is turned Off :  0,5 sec

Power Requirements:  AC 100, 110, 120, 220, 240 V  50/60 Hz

Power Consumption:  80 W

Dimensions (W x H x D):  437 x 136  x 355 mm (17,5" x 5,4" x 14")

Weight:  12,5 kg (27,5 lbs)

 

Onkyo DX-7500 cd player

Onkyo DX-7500 is a fully featured Compact Disc player. It features dual 18-bit D/A converters with eight-times oversampling at 352,8 kHz. The player also makes extensive use of optical signal transmission and isolation techniques.

Onkyo's Opto-Drive system is claimed to completely eliminate any electromagnetic interference from the outputs of D/A converters by using phototransitors instead of diodes to regulate the power-supply voltage to the converts. Optical coupling between the digital and analog circuitry of the DX-7500 eliminates the possibility that digital signals could leak into the analog sections and degrade the output quality. The analog audio outputs are supplemented by two digital outputs - electrical and optical - for use with an external D/A converter.

In addition to its internal sophistication , the DX-7500 offers almost every feature one could hope to find in a CD player. Besides the usual operating functions, including repeat of a track, disc, or any selected portion , it has a Time Editing feature that determines how many tracks can be accommodated on each side of a tape cassette.

The memory system can be programmed to play up to twenty tracks of a CD in any order, and a Memory Edit feature allows the program to be modified at any time. The player haas a shuffle-play mode, in which all the tracks on a disc are played back in a random order. It also provided direct keypad access to any numbered track.

 

Specifications

Signal Readout System:  Optical non-contact

Reading Rotation:  About 500 - 200 rpm (constant linear velocity)

Linear Velocity:  1,2 - 1,4 m/s

Error Corection System:  Cross Interleave Raedsolomon Code

Decoded Hits:  18 bits linear

Sampling Frequency:  352,8 kHz (eight-times oversampling

Number of Channels:  2 (stereo)

Frequency Response:  5 Hz - 20 kHz

Total Harmonic Distortion:  0,0015% (at 1 kHz)

Dynamic Range:  103 dB

Signal-to-Noise Ratio: 110 dB

Channel Separation:  103 dB ( at 1 kHz)

Wow and Flutter: below threshold of measurability

Output Level: 2 V RMS

Power Consumption:  23 watts

Dimensions (W x H x D):  435 x 131 x 365 mm (17-1/8" x 5-1/8" x 14-7/16")

Weight:  8,8 kg (19,4 lbs)

 

Onkyo T-4055 tuner

 AM /FM Stereo Tuner

Front End

A tuner that catches distant signals along with a lot of noise is almost usless. What is needed is a tuner that catches the signal, detects it and at the same time rejects interference and noise as it recomposes the signal into a fresh sound image. This objective is accomplished in the front end of model T-4055. dual gate MOS FET's are used in the RF and Mixer stages. This design makes the tuner sensitive to weak signals. Since it is able to handle both types of signals model T-4055 can bring a true music image from distant as well as near FM stations. This unit has a spurious noise rejection figure of over 90 dB

 

IF Stages

IF stages play an important part in tuners because they determine the distortion ratio of the whole unit. Model T-4055 is deisgned with 6 IF stages so that distortion can be kept to a minimum. They also provide the needed gain in the tuner. The tuning circuit of model T-4055 employs caramic filters in place of the usual coil and capacitor types. They provide sharp selectivity and broad bandwidth  FM signals are less susceptible to interference but can still be bothered by advers atmospheric conditions and made interference such as ignition noise. In model T-4055, 5 of the 6 IF stages act as limiters to keep out such botheresome interference. This unit has a capture ratio of 1,2 dB and its alternate channel attenuation (selectivity) is better than 80 dB. Model T-4055 takes the worry out of having so many FM stations on the air at the same time. It separates them effectively.

 

Ratio Detector

A ratio detector is needed to convert the FM sugnal into an auio signal. In model T-4055 a very advanced design is used. A look at the ratio detector S curve shows that this tuner provides a very broad bandwidth of 900 kHz, peak to peak, along with perfect linearity. The ratio detector operates in combination with the front end and finely designed IF stages for excellent reception with a minimum of distortion. Model T-4055 keeps distortion to less than 0,2% (mono) and 0,5% (stereo)

 

Muting Circuit

Onkyo designed model T-4055 to be very sensitive and this created a new problem. Interstation moise also ended to incerase along with sensitivity. To eliminate this type of interference there is a special muting circuit controled by a muting switch which is turned on the irritating interstation noise can be eliminated. You will receive the station you want without interference from other signals. However, if you want to listen to a very distant and weak station the muting switch should be turned off or the muting circuit will cut out the desired station also.

 

Automatic FM MPX Section

Model T-4055 boasts of an improved FM stereo/mono automatic switching circuit. Most modern tuners, of course, automatically change from stereo to mono and mono to stereo. Model T-4055 is different and better. It not only detects the 19 kHz pilot carrier which activates the stereo circuit but it also measures the strength of this carrier. If the 19 kHz carrier is not strong enough for good FM stereo reception this tuner will not change to stereo. The purpose of this special circuit is to provide good music at all times whether this music is stereo or mono.

AM Section

The AM sectio od model T-4055 was not neglected either. It sounds much better than you would expect AM to sound because of the advanced circuit technology and latest components that are used. A two gang variable capacitor, ceramic fiters, and a sensitive buikt-in ferrite core antenna are a few of the element that make this AM section highly sensitive and selsctive. It's not as good ass FM, of course, but for AM it's very good.

 

Variable/Fixed Output Level

Model T-4055 has one fixed and one variable output jacks in the rear panel. The fixed output is 0,75 V (FM). The variable output can be changed from 0-2 V (FM). There is a level control knob in the front panel for changing the output from 0 - 2 V (FM)

 

Multipath Detection System

Usually an oscilloscope must be used when trying to point the antenna in any direction for best reception of a particular station. Model T-4055 also has an output so that an oscilloscope can be used to find the directtion for optimum reception. But  Model T-4055 also has something alse - a Multipath Detection System. With this model it is possible to hear the multipath sound directly through the right speaker. The operation is simple. Set the lever in the back of the panel to Multipat Detection. Turn the antenna until you hear the least noise coming from the right speaker. That is the position for best reception.

 

Specifications

Type:  Solid State AM/FM Stereo Tuner

Semiconductors:  39 Transistor (2 FET), 36 Diodes

Tuning Range: 

FM :  88 - 108 MHz

AM :  530 - 1605 kHz

Sensitivity:

FM :  1,7 µV (IHF)

AM : 20 µV , 150 µV/m

Intermediate Frequency:

FM :  10,7 MHz

AM :  455 kHz

Capture Ratio:

FM :  1,2 dB

Image Rejection Ratio:

FM :  95 dB (98 MHz)

AM :  33 dB (1 MHz)

AM Suppresion Ratio: 

FM :  55 dB

Signal-to-Noise Ratio

FM :  70 dB (IHF)

AM :  50 dB (30%, 1 mV input)

Alternate Channel Att. : 

FM :  80 dB

Total Harmonic Distortion

FM :  0,3% (mono), 0,5% (stereo)

AM :  0,5

Frequency Response;

FM :  20 - 15,000 Hz (+0 -2 dB)

MPX Separation

FM :  40 dB (400 Hz); 35 dB (100 - 10,000 Hz)

Carrier Leakage:

FM :  -70 dB

Output Impedance:  2,5 k Ω  (Fixed); 1,5 k Ω  (Variable Max)

Output

FM :  0 - 2 V (Variable); 0,75 V (Fixed)

AM :  0 - 0,6  V (Variable); 0,2 V (Fixed)

Antenna : 

FM :  300 and 75 Ω

AM :  Ferrite Core Antenna

Power Supply:  AC 110/ 120/ 220/ 240 V 50/60 Hz

Dimensions (W x H x D) :  423 x 136 x 355 mm (16-5/8" x 5-3/8" x 14")

Weight:  7,1 g (15,65 lbs)

Onkyo Integra 725 amplifier

 Preamplifier Section

Equalizer Stage

One problem that is not taken care of by many preamplifiers is transient response because their measurements depend on the input being a sine wave. Unfortunately, this simple wave is not the same as the comlex signal produced by live music. The real dynamism of live music comes from its many abrupt and impulsive sounds. It is this dynamic sound that can cause distortion due to poor transient response in all circuits if nothing is done to prevent it in the design of the equipment. In the equalizer stage in particular this problem of transient response must be handles because this is the input stage for the music signal. If the signal is distorted in this first stage it gets worse and worse until the distortion destroys all listening pleasure.

Precise equalization is one of the very important features of a preamplifier. To avoid any distortion that might come from saturation in this equalizer stage model 725 has a big phono overload capacity of 200 mV at 1 kHz and 930 mV at 10 kHz. The phono overload capacity gets larger with the rise in frequency so that it is the same as that of the RIAA  equalization curve. RIAA deflection is ±0,5 dB from 30 to 15,000 Hz. The signal to noise ratio is better than 70 dB.

 

Tone Control

The Tone Control is put in model 725 so that each individual can adjust the tone to fit his own taste in music. The Tone Control has click stops and each stop represents 2 dB up or down. High grade components have been selected for the Tone Control so there is always exact response, low distortion and high stability.

 

Transient Killer

Model 725 has been equipped with the Transient Killer to prevent the usual disturbing noise that you hear when an ordinary amplifier is switched on or off. The Transient Killer in this model guarantees that there will be no irritating sounds to disturb your music enjoyment every time you turn the set on.

 

Power Amplifier Section

Model 725 is the fruit of Onkyo's tireless efforts to reduce distortion of any kind in the amplifier section of its equipment. Distortion is reduced in model 725 because of the quasi complementary SEPP, direct coupled and differential amplifier circuitry. The computer was used to analysis the very complex music signal and this analysis extended outside the audible range. This extensive measurement was necessary because Onkyo found that the very low frequencies have a distinct influence on the music even though they cannot be heard by the human ear. Ordinary amplifiers do not take these very low frequencies into consideration and consequently cause a lot of Intermodulation Distortion.

The statistic for this amplifier are very excellent. It is capable of delivering a continuous power output of 22 watts per channel at 8 ohms. The Total Harmonic Distortion of model 725 is rated at less than 0,05% at 10 watts, 1 kHz.

 whether used at full power or very low output the same low distortion rate is maintained. Stability is enhanced by the use of a differential amplifier, instability in an amplifier will put DC voltage on the loudspeaker terminals which will causes excessive distortion.

Fluctuations in the power supply voltage and temperature can also cause distortion but these fluctuations are solved by the differential amplifier. The OCL circuitry is an added reason why this model has less distortion, a flatter response over the whole frequency range and especially good damping in the lower frequency range.

 

Top Panel Connectors and Large Heat Sink

Model 725 has all its connectors centralized on the top panel so that connecting and disconnecting is simplified. This is especially true if the amplifier is placed against a wall. Instead of having connectors in the rear panel this model uses the rear panel as a large Heat Sink which helps to protect the power transistors as well as the rest of the amplifier. This is important because of the change in the capacity of the transistor. However, because of the large Heat Sink in model 725 it always stays cool no matter how long it is used at full power.

 

Multi step-up terminals

The design of model 725 is unique in that its preamplifier and main amplifier can be used separately. This design opens up new possibilities for the music lover because model 725 can easily be the base of a multi-amplifier stereo system if either model 624 or 613 is added. These two model are dividing amplifiers and they do the job of separating and amplifying the signals before they are passed on to the tweeter, mid-range speaker, and woofer. If only one extra unit is added your system is up-graded to a bi-amplifier system. If two units are used your system will become a tri-amplifier system. The top panel of model 725 makes connecting and disconnecting very easy because all the terminals are located on the top of the  unit and not in the back as is the case with most units.

 

Specifications

Type:  All Silicon Transistor Integrated Stereo Pre-Main Amplifier

Circuit:  Direct-Coupling and Differential Amplifier, Quasi-Complementary SEPP System, Transistor 29, Diode 18, Therminator 2

Main Amplifier (8 Ω  load in case of no indication)

Dynamic Power:

70 W (IHF) zt 8 Ω

100 W (IHF) at 4 Ω

RMS Continuous Power

22 W + 22 W (8 Ω  , 1 kHz) Single Channel Driven

27 W + 27 W (4 Ω , 1 kHz) Single Channel Driven

Total Harmonic Distortion

At Rated Output (1 kHz) :  less than 0,1%

At 0,5 W Output (1 kHz) :  less than 0,05%

At 10 W Output (1 kHz) :  less than 0,05%

Intermodulation Distortion:  less than 0,05% at 10 W output (SMPTE 70 Hz : 7 kHz = 4 : 1)

Frequency Characteristic:  15 Hz - 70 kHz ( +0 -1 dB at normal output)

Power Bandwidth: 10 Hz - 100 kHz (IHF -3 dB T.H.D. 0,5%)

Signal-to-Noise Ratio :  better than 100 dB (IHF-A network)

Damping Factor:  60 (DC  - 30 kHz)

Residual Noise:   0,001 µW (IHF input shunt)

Load Impedance:  4 Ω  - 16 Ω

Input Impedance:  100 k Ω  (10 Hz - 50 kHz)

Gain:  22 dB

Rated Input Voltage:  IV

Input ?Output Characteristics:  In-phase

Pre-Amplifier

Input Sensitivity/Impedance

Phono 1 :  2,4 mV / 50 k Ω  and 100 k Ω

Phono 2 :  2,4 V / 50 k Ω  (1,03 kHz)

Tuner, Aux-1, Aux-2 and Play :  100 mV / 100 k Ω

Total Harmonic Distortion :  less than 0,05% at 1 V output (1 kHz)

Intermodulation Distortion :   less than 0,05% at 1 V output (1 kHz) (SMPTE 70 Hz : 7 kHz = 4 : 1)

Frequency Response:

Phono 1, Phono 2 :  50 - 15,000 Hz (±0,5 dB RIAA Characteristics

Tuner, Aux-1, Aux-2, Play :  10 - 60,000 Hz (+0 -1 dB at 1 V output)

Max. Allowable Input (Phono):  200 mV (at 1 kHz); 930 mV (at 10 kHz)

Signal-to-Noise Ratio (IHF A Network Input Shunt)

Phono 1, Phono 2 :  75 dB

Tuner, Aux-1, Aux-2, Play :  90 dB

Output Voltage? Impedance

Pre-Out 1, Pre Out 2 (100 k Ω  at load) :  IV (rated output);. 4 V (max output) 2,5 k Ω

Rec Out:  100 mV (rated output open terminal voltage) 30 k Ω  (phono)

Tone Control (2 dB/step switch type)

Treble :  ±10 dB at 10 kHz

Bass :  ±10 dB at 100 Hz

Filter: 

High :  6 dB/oct  at 8 khz

Low :  6 dB/oct at 70 Hz

Muting:  -20 dB

Loudness:  6 dB at 100 Hz (VR -30 dB position)

Input/Output Characteristics:  in-phase

Transient Killer Operation Time:  3 sec when SW is turned On

0,5 sec. When SW is turned Off

Power Requirements:  AC 110/120/220/240 V, 50/60 Hz

Power Consumption:  30 W

AC Output:  Switched, Unswitched

Dimensions (W x H x D):  313 x 366x 136 mm (12,%" x 15,6" x 5,4")

Weight: 8 kg (17,6 lbs)

Onkyo CP-1030F turntable

An incredible sound experience awaits you. An experience that technology alone finds hard to explain. You'll hear music of such stunning purity and sensual richness, that you'll wonder how any turntable could make that much of a difference.

That's the secret of Onkyo. The unique ability to take you several steps beyond pure technology, to a world of more exciting sound. And we provide it in all our components, including all five of our turntables.

The Onkyo CP-1030F Full Automatic Turntable is an outstanding example. Its unique design lets you take much fuller advantage of today's most sensitive high-compliance cartridges, providing more perfect record groove tracking and more perfect damping of the vibrations that destroy perfect sound quality.

The Onkyo CP-1030F utilizes a uniquely designed low mass, straight-line carbon fiber tonearm and headshell. Its construction assures purer sound even with warped records. Infrared sensors replace the usual mechanical devices that detect the end of record play - returning the tonearm more silently to the Off or Repeat position. Manual cueing is also smoother and more precise, with far less lateral drift during stylus descent.

A Quartz-locked DC direct-driver motor, with an LED illuminated strobe, assures rotational speed accuracy. And a separate motor controls automatic tonearm movement functions.

The entire turntable rests on a highly stable triple-insulated suspension system to isolate it from room vibrations and sound vibrations from your speakers.

Styling is superb.

Silver-grey with black, low lustre metal and a crystal dust cover. Feather-touch control buttons are front-panel mounted, with a full array of LEDs indicating all function setting.

The CP-1030F is just one of five remarkable turntables from Onkyo.

Specifications

Type:  2-speed fully-automatic turntable with cueing lever

Turntable Platter:  310 mm (12-3/16") aluminum die-cast

Motor:  Brushless, coreless, slotless, DC Quartz Direct Drive

Speeds:  33-1/3 rpm, 45 rpm

Wow and Flutter:  0,03% WRMS

Signal-to-Noise Ratio:  75 dB (DIN B)

Tonearm:  Static balanced straight pipe

Effective Arm Length:  224 mm (8-13/16")

Overhang:  13 mm (1/2")

Maximum Tracking Error:  +3 degrees, -1 degree

Usable Cartridge Weight:  Min. 5,0 g; Max. 8,5 g

Power Supply Rating:  AC 110-120, 220-240 V, 50/60 Hz (or 240 V at 50 Hz. 120 V at 60 Hz, only)

Power Consumption:  6 watts

Dimensions (W x H x D):  453 x 370 x 133 mm (17-7/8" x 14-1/2" x 5-1/4")

Weight:  6,5 kg (14,3 lbs)

Cabinet Composition

Turntable Board:  Polystyrene

Bottom Board:  Fiber Reinforced Polyethylene

Dust Cover:  Polystyrene

Onkyo TA-2058 cassette deck

The Integra Series

Onkyo's Integra sound is one that comes as close as possible to duplicating the abundance of energy and the richness of detail of a live performance. Whether you're seking to capture all the tonal colors that a symphony orchestra is capable of creating, or the synthesized, electronically amplified sounds of modern music, the cassette decks introduced here are designed to bring them to you with astonishing realism. They represent Onkyo's high technology achievements constantly refined through listening tests by experts. You'll have to operate and listen to one of these superb tape decks to understand Onkyo's dedication to excellence in the audio field; the live sound of the Integra Series.

Full Automatic Accubias with 5 Response Positions

Both the TA-2058 and TA-2048 Cassette Deck are equipped with Onkyo's unique Accubias system for fine tuning the recording bias to achieve the widest, flattest frequency response possible. On the TA-2058 , Accubias is completely automatic; the optimum amount of bias is applied for each tape type. There are aso 5 preset frequency rsponse positions so that the user can manually set the bias to obtain the desired sonic characteristics. Proper biasing is essential for high quality recording, and Onkyo has made great strides in bias accuray, automation and the elimination of guesswork.

4-Digit Real Time Tape Counter

A 4-digit LED displays the minutes and seconds elapsed since tape fransport was started or the time remaining. Instead of just a tape counter, the real time counter gives you the actual program time of the tape you're listening to. This means no more guesswork, for instance, about how much actual time is left on a cassette when recording. Locating a particular song or editing becomes much easier. There are a series of tape length selector buttons below the time display compatible with all standard cassette formats.

Other Features:

3-Motor, 3-Head configurtation with Special Hard permalloy

Silent tape transport with Micro-Computer Control

Auto Space Function

Automatic-Music Control System

Dolby B, C and HX-PRO

Two repeat modes

Two 10 segment, 2-color LED level indicators

Separate left and right microphone jacks

Rec/Play timer switch

Memory Play and Stop switch

MPX filter with on/off switch

Compatible with RC-5T remote control unit

Optional wood grain side panels (CW-K58) can be attached for added elegance

Specifications

Track Format:  4-tracks, 2-channels

Erase System:  AC erase

FF and Rewind Time:  90 sec. (C-60)

Wow and Flutter:  0,045% (WRMS)

Frequency Response:

Metal Tape :  20 - 19,000 Hz (30 - 18,000 Hz ±3 dB)

High Position Tape :   20 - 18,000 Hz (30 - 17,000 Hz ±3 dB)

Normal Tape :  20 - 17,000 Hz (30 - 16,000 Hz ±3 dB)

Signal-to-Noise Ratio:  60 dB (Metal, Dolby Nr Out)

Inputs [Sensitivity/Impedance]:

Line In Jacks :  [2] 60 mV/50 k Ω

Microphone Jacks : [2] 0,6 mV(600 Ω) /5,6 k Ω

DIN in Jack :  [1 EU models] 0,1 mV(1 k Ω) /2,7 k Ω

Outputs [Level/Impedance]:

Line Out Jacks :  [2] 500 mV (0 dB)/more than 50 k Ω

Headphone Jack :  [1] -/8 - 200 Ω

DIN Out Jack :  [1 EU models] 500 mV (0 dB)/more than 50 k Ω

Motors:  3 motor system, DC servo Motor x 1 , DC motor x 2

Heads:  Rec/Pb Special hard permaloy  x 1; Erase, Ferrite x 1

Power Supply Rating (4 types):  AC 120/220 V Switchable 50/60 Hz

Dimensions (W x H x D):  435 x 112 x 360 mm (17-1/8" x 4-3/8" x 14-1/8")

Weight:  6,1 kg (13,4 lbs)