What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Denon PMA-500V amplifier


 Powerful amplifier with practically distortio-free performance.

PMA-500V features:

Denon's Non-NFB amplifier for extremely pure, high-speed amplification thanks to complete separation of the power amplifier stage into voltage amp and power amp

Pure Current Supply circuit with Denon's original bridged block capacitors suppress dynamic IM dustrotion by 60 dB

7 sets of audio input terminals

Electronic switches and ideal chassis construction eliminate external noise

Super Equalizer with range response

Independent subsonic filter switch provided for record playback with ann MC or MM cartridge


Non-NFB Power Amplification - Striking Power with Digital Sources

The PMA-500V includes Denon's original Non-NFB amplifier for extremely pure, high speed amplification. By completely separating the power amplification stage into voltage amplification and power amplification stages,, the influence of counter-electromotive force from the speakers is eliminated. As a result , iy has been possible to reduce all types of distortion to nearly zero, including dynamic distortion such as tim, to obtain high quality amplification.. In addition, the PMA-500V uses large capacity (Pc 100W) high speed transistors for high current drive, providing at the same time both the sharp, clear sound characteristics of Non-NFB amplification, and a high slew rate of ±150 V/µsec


"Pure Current Supply" Decreases Dynamic IM Distrtion by 60 dB

The PMA-500V also incorporates a large size heat sink, a multiple shielded large transformer, and capacitors for large scale capacity (27,000 µF total). The result is a stable power supply with high dynamic power and strength even for the ultra-low frequencies. Additionally, the  "Pure Current Supply"  circuit with Denon's own bridged block capacitor system suppresses dynamic IM distortion greatly for improved sound quality


Electronic Switches and Ideal Chassis Construction Eliminate External Noise

In order to eliminate the influence of magnetic and electrical noise, the chassis construction divides the power supply section and main signal circuitry at the heat sink, thus markedly reducing mutual interferences. In addition, electronic  switches are used for the input selectors, reducing wiring and resulting in an ideal layout to make signal paths simple


Newly Developed Subsonic Filter and Super Equalizer

An ezcellent subsonic curve is achieved (16 Hz; -12 dB/oct) for both Mc and MM playback. An independent switch is provided for tuning each subsonic filter and phono equalizer on and off. Working together with the wide-range 920 Hz - 50 kHz ±0,3 dB, MC). Super Equalizer, optimum conditions are ensured for refined analog disc reproduction


Additional Features:

Two sets of Video Inputs

A rotary speaker selection switch

Real-time tone control with no reduction in sound quality



Power Amplifier Section

Rated Output Power (both channel driven):  80 W per channel min. RMS into 8 Ω from 20 Hz to 20 kHz with no more than 0,05% T.H.D.

80 W + 80 W (8 Ω, 20 Hz - 20 kHz)

130 W + 130 W (4 Ω, 1 kHz DIN 1% T.H.D.)

Dynamic Power: 

150 W + 150 W (4 Ω)

160 W + 160 W (2 Ω)

Total Harmonic Distortion:  0,007% (-3 dB at rated output, 8 Ω)

Intermodulation Distortion:  0,003% (60 Hz / 7 kHz : 4 / 1 at rated output, 8 Ω)

Power Bandwidth:  5 Hz - 80 kHz (8 Ω, T.H.D. 0,07%)

Frequency Response:  4 Hz - 150 kHz (at 1 W)

Output Impedance:  0,1 Ω (1 kHz)

Slew RaTe:  ±150 V/ µsec

Preamplifier Section

Input Sensitivity/Impedance

Phono MC :  0,2 mV/100 Ω

Phono MM :  2,5 mV/47 k Ω (190 PF)

Aux/Video-1, Aux/Video-2, CD, Tuner, Tape -1, -2 :  150 mV/30 k Ω

Max. Input/Level:

Phono MC :  12 mV/ 1khz

Phono MM :  160 mV/1 kHz

Max. Output /Rated Output:  10 V/150 mV

RIAA Deviation:  20 Hz - 50 kHz ±0,3 dB (MC)

Total Harmonic Distortion:  0,002%(1 kHz, 8 V output)

Signal-to-Noise Ratio:

Phono MC :  68 dB (at 0,5 mV input)

Phono MM :  88 dB (at 5 mV input)

Aux/Video-1, Aux/Video-2, CD, Tuner, Tape -1, -2 :  105 dB

Tone Control:

Bass :  ±8 dB at 100 Hz

Treble :  ±8 dB at 10 kHz

Loudness Control: 

Low :  ±7 dB at 100 Hz

High :  ±6 dB at 10 kHz

Subsonic Filters:  16 Hz  -12 dB/oct


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

Power Consumption:  170 W

Dimensions (W x H x D):  434 x 372 x 385 mm

Weight:  9,4 kg

Denon PMA-300V amplifier

PMA-300V integrated amplifier features:

A hefty power supply transformer and large capacitors provide excellent dynamic power characteristics and high output power.

"Pure Current Supply" decreases dynamic IM distortion by 60 dB

Electronic switches and ideal chassis construction eliminate external noise.

7 sets of audio inputs

Feather-touch input selectors for superior ease in handling.

Powerful yet elegant design, living up to precendents set by Denon's PMA-900V series of high-class amplifiers


"Pure Current Supply" Decreases Dynamic IM Distrtion

The Pure Current Supply circuit with Denon's original bridged block capacitor system suppresses dynamic IM distortion by 60 dB for improved sound quality. Furthermore, a hefty power supply transformer provides excellent dynamic power characteristics and a high power output of 60 W + 60 W (8 Ω, 20 Hz- 20 kHz)

High Dynamic Power

The power amplifier section  a result of Denon's long exceptional power transistors (Pc 80 W, ft 20 MHz) for greater dynamic power. The dynamic output is a full 115 W + 115 W with 4 Ω , and 120 W  + 120 W with 2 Ω speaker loads.

7 Sets of Audio Inputs

Equipped with 7 sets of audio input terminals for connecting various kind of audio equipment such as Phono, Aux/Video-1 Aux/Video-2 CD Tuner and Tape -1, -2

Straight Amplification Design

The chassis design promotes the sortest signal transfer, and parts are ideally placed on only one single board thanks to superior mounting techniques.



Power Amplifier Section

Rated Output Power (both channel driven):  60 W per channel min. RMS into 8 Ω from 20 Hz to 20 kHz with no more than 0,05% T.H.D.

60 W + 60 W (8 Ω, 20 Hz - 20 kHz)

80 W + 80 W (4 Ω, 1 kHz DIN 1% T.H.D.)

Dynamic Power: 

115 W + 115 W (4 Ω)

120 W + 120 W (2 Ω)

Total Harmonic Distortion:  0,008% (-3 dB at rated output, 8 Ω)

Intermodulation Distortion:  0,005% (60 Hz / 7 kHz : 4 / 1 at rated output, 8 Ω)

Power Bandwidth:  5 Hz - 40 kHz (8 Ω, T.H.D. 0,07%)

Frequency Response:  4 Hz - 100 kHz (at 1 W)

Output Impedance:  0,1 Ω (1 kHz)

Preamplifier Section

Input Sensitivity/Impedance

Phono MC :  0,25 mV/100 Ω

Phono MM :  2,5 mV/47 k Ω (180 PF)

Aux/Video-1, Aux/Video-2, CD, Tuner, Tape -1, -2 :  150 mV/30 k Ω

Max. Input/Level:

Phono MC :  12 mV/ 1khz

Phono MM :  160 mV/1 kHz

Max. Output /Rated Output:  10 V/150 mV

RIAA Deviation:  35 Hz - 20 kHz ±0,5 dB (MC)

Total Harmonic Distortion:  0,004%(1 kHz, 8 V output)

Signal-to-Noise Ratio:

Phono MC :  68 dB (at 0,5 mV input)

Phono MM :  86 dB (at 5 mV input)

Aux/Video-1, Aux/Video-2, CD, Tuner, Tape -1, -2 :  98 dB

Tone Control:

Bass :  ±8 dB at 100 Hz

Treble :  ±8 dB at 10 kHz

Loudness Control: 

Low :  ±7 dB at 100 Hz

High :  ±6 dB at 10 kHz

Subsonic Filters:  16 Hz  -12 dB/oct


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

Power Consumption:  115 W

Dimensions (W x H x D):  434 x 112 x 281 mm

Weight:  5,8 kg

JVC JA-S11 amplifier



30 watts per channel , minimum RMS, both channels driven, into 8 ohms, from 20 Hz to 20 kHz with no more than 0,1% Total Harmonic Distortion

Two-Deck Dubbing and Tape-2 terminals on front panel

Class-A Phono Equalizer

If you want an easy-to-operate amplifier with  perfect performance, the JVC JA-S11 is the one to hear. Weve stripped off all the frills, retained ony useful features like two-deck and two-speaker-pair connection facilities. Moreover, since it's a JVC we've msde doubly sure it meets super hi-fi performance requirements to bring you Closer to the Musical Truth. The JVC JT-V11 is its matching tuner.

Direct-Coupled OCL Design

Like our more expensive models, the power amplifier of the JA-S11 features a direct-coupled OCL (Output Capacitor-Less) fully complementary design. Since signals are amplifies and sent out to conected speakers directly, reproduction is clean, clear and dynamic.

Class-A Phono Equalizer

JVC's sound policy is that all amplifiers (or amplifier stages inside an integrated amplifier) except the final power output should be of the Class-A configuration. This configuration keeps distortion low for more pleasing musical sonority of particular importance in phono equalizers where delicate and minute signals are handled. Superb specifications of the JA-S11 include ±0,5 dB RIAA accuracy and 150 mV phono overload capability (RMS).

Tape-2 terminals Up Front

Every one of JVC's new lineup amplifiers features two-deck connection and Tape-2 terminals up front. What are the advantages of this JVC facility? One is that you can connect two tape decks and dub from any of the two  to the other. Another is that you can undertake dubbing while enjoying other programs, such as records and radio broadcasts. The third is that you don't need to reach into the back of the unit to connect equipment for temporary use (portable decks, etc.)

Two Speaker-Pair Connection

This is a JVC feature you'll appreciate if you have one set of speakers in your listening room and another in the adjoining room, since it lets you enjoy music in both rooms simultaneously. An unusual array of controls- Bass/ Trebble. Tone , etc. - fill out the key features of this easy-to-afford stereo integrated amplifier.



Power Amp Section

Output Power (both channel driven): 

30 watts per channel (RMS into 8 , 20 Hz - 20 kHz, 0,1% T.H.D.)

33 watts per channel ( into 8 , at 1khz , 0,1% T.H.D.)

Total Harmonic Distortion (at 30 W , both channel driven):  0,05% at 1 kHz

Intermodulation Distortion:  0,1% at rated output

Load Impedance: 

4  - 16  ( system -1 or system-2)

8  - 16  (system-1 + system-2)

Damping Factor:  more than 30 at 8  (20 Hz -20 kHz)

Pre-Amplifier Section

Input Sensitivity/Impedance

Phono :  2,5 mV/ 47 k

Aux, Tape, Tuner:  150 mV/50 k

Output Level:

Tape Rec -1, -2:  150 mV

DIN Rec :  30 mV

Phono Equalizer Deviation:  ±0,5 dB from RIAA curve (25 Hz - 15 kHz)

Phonoo Overload:  150 mV (RMS) at 1 kHz, 420 mV (P-P)

Signal-to-Noise Ratio: 

Phono :  65 dB

Aux :  85 dB

Frequency Response:  25 Hz - 40 kHz  +0 -1 dB

Loudness Control:  +6 dB at 100 Hz +4 dB at 10 kHz

Tone Controls:

Bass :  ±8 dB at 100 Hz

Treble :  ±8 dB at 10 kHz

Power Source: 110V, 120 V, 220 - 240 V 50/60 Hz

Power Consumption:  235 watts

Dimensions (W x H x D):  390 x 152 x 330 mm (15-11/32" x 5-3/32" x 13")

Weight:  7 kg (15,4 lb)

Pioneer CT-4141 cassette deck


The potential of cassette stereo sound reaches its zenith with this outstanding new deck from Pioneer, a thoroughly professional unit with multiple advanced features. The first Pioneer deck of its kind with built-in Dolby noise reduction unit, the CT-4141 offers one of the widest frequency response ranges of any deck in this time on the market, 30 to 16,000 Hz when chromiumdioxide tape is used. The Dolby system is employed to eliminate irritating tape hiss and noise and does this most effectively without sacrificing important tonal quality. All in all, cassette tape has never sounded better than with this complete deck, which is also equipped with a chromium tape selector that allows you to use this new kind of tape manufactured especially for near-flawless sound reproduction, wide frequency response and extra-wide dynamic range. When matched with the Dolby unit, chrome tape will provide a cassette sound that is the equal of expensive open-reel tape decks. Other standard and standout features of the CT-4141 include a ferrite soild tape head, designed for long service life, as well as an electronically controlled DC motor that assures a very high Signal-to-Noise Ratio. There is a tape running pilot light that provides assurance that all is functioning well, and a "skip" button that enables you to use the fast-winding function while monitoring sound reproduction, when the mode key has been set to "play". Noo other deck on the market, at the price of the CT-4141, offers so many exclusive and important features for superb sound reproduction.

Ferrite Solid Head for Long-life

The high performance chromium tapes possess a 50% higher density of magnetic particles than conventional cassette tapes, and can therefore impair the conventional tape head over an extended period of time durability of the head is thus a key concern for all contemporary decks and the  CT-4141 has one of the most durable of all. The ferrite soild head employed in the CT-4141 will give lifelong service and durability when used with any kind of tape. Additionally, you can expect a variety of other important benefits from this head, including little loss of high frequency bias, magnetic power and improved frequency characteristics especially in the high frequency ranges. The surface of this head is mirror-finished, to protect your tapes and to afford an extremely smooth head touch to the tape. This fine surfacing also contributes to dust-free usage af all tapes, and helps to suppress background noise that often occurs from magnetization.



Modes:  Comact cassette, 2-channel stereo, stereo/mono

Tapes:  C-30, C-60, C-90, C-120 (Standard, Low-noise high-output, Chromium dioxide)

Recording System:  AC bias (bias frequency; 85 kHz)

Erasing System:  AC system

Recording/Playback Head:  Ferrite Solid Head

Motor:  electronically controlled type DC motor

Wow and Flutter:  less than 0,13% (WRMS)

Signal-to-Noise Ratio:  48 dB (standard tape); 58 dB (Dolby on)

Frequency Response:

Standard Tape :  30 to 13,000 Hz

Chrome Tape :  30 to 16,000 Hz

Fast Winding Time:  within 80 sec (C-60 tape)


Line Input (Rec):  50 mV/300 k

Microphone :  0,5 mV/ 50 k  


Line Output (Playback) :  0,775 V/50 k

Phones :  0,2 mW / 8

REC/P.B Jack :  DIN type


Amplifier Section :  39 Transitors; 1 Thyristor; 24 Diodes; 1 LED

Motor Section :  2 Transistors; 1 Diode

Power Requirement:  120 V, 60 Hz or 110 - 130 V, 220 - 240 V 50/60 Hz

Power Consumption:  13 watts

Dimensions (W x H x D):  396 x 96 x 242 mm (15-19/32" x 3-25/32" x 9-17/32")

Weight:  5,1 kg (11 lb 4 oz)

Audio Research SP-12 preamplifier


Audio Research Preamplifier

The SP-12 is a musically accurate, High Definition wide bandwidth, vacuum tube preamplifier offering the  serious music enthusiast uncompromised performance. With proper attention to set up the SP-12 can be placed in virtually any quality audio system, from the least costly to the most sophisticated without compromise in system performance. The SP-12 appeals to a variety of music lovers,, from the enthusiast experiencing high quality sound reproduction for the first time to the most seasoned audiophile.

Four Critical performance Areas:

Harmonic Integrity - Audio Research preamplifiers provide the listener with a unique sense of "harmonic rightness". Delicate harmonic structures essential to musical accuracy remain wholly intact, creating a musical performance with a sense of "aliveness".

Clarity - Providing a clarity of sound that immediately  impresses the listener. Audio Research  preamplifier are totally absent of the "heaviness" or "veling" of sound present in other designs. There is also a notable lack of "hardness", "edge" and "grain" that masks fine detail in other preamplifiers.

High Definition - While other preamplifiers obscure important musical information, Audio research preamplifiers reproduce all of the subtle colors, shadings and ambient detail that create the illusion of a "you are there" performance. The Sp-12 efforlessly sort through complex musical material placing every instrument and voice onto the proper acoustic stage. This High Definitionquality is a hallmark of all Audio Research products.

Dynamic Expression - Audio Research preamplifiers excel in reproducing a musically accuarte dynamic range.  Highly stable power supplies and essentially overload-proof output sections result in preamplifiers that reproduce the quietest notes to the loudest and most  complex musical passages. Separation of instruments and voices remains intact at every level without "smearing" or collapse of sound field.



Front panel muting for repeat settings, interruptions, etc.

Front panel power switch for activating back-chassis, plug-in power receptacles

High accuracy, close tracking, segmented gain control

Sonically selected components for optimum sound performance

Optional rack mount and automatic mute version available

Near military grade construction used throughout



Frequency Response:

High Level :   5 Hz - 30 Hz, +5 dB

Magnetic Phono :  30 Hz to 20 kHz,  +25 dB of RIAA

Total Harmonic Distortion:  less than 0,02% 2V RMS output

Input Impedance: 

Phono :  50 k Ω

High Level :  100 k Ω


High Level :  250 µV RMS (max residual unweighed wideband noise)

Magnetic Phono :  5 µV (max equivalent input noise, wideband RMS)

Tube Complement:  5 x ECC88 / 6DJ8

Dimensions (W x H x D):  15,6" x 4,5" x 8,9" (19" W with optional rack mount front panel)

Weight:  4,1 kg (9 lbs)

Avalon Ascendant loudspeakers


Superlative performance in a compact package, the Avalon Ascendant features many of the design philosophies pioneered in the Isis. Easy to drive and efficient, the Avalon Ascendant is a magican, throwing a huge and stable soundstage in even modest size listening rooms. The dynamic Avalon Ascendant combines startling bass response with concise transparency once deemed unthinkable for a transducer of this size. Transient bass impact is startling with vanishingly low 2nd and 3rd harmonic distortion properties. Combining exceptional efficency and easy of drivability, the Avalon Ascendant will extract truly dynamic performance from amplifiers possessing only moderate power output levels building vast and open soundstaging vistas.

Transparency and imaging clarity have been the defining hallmarks of all Avalon Acoustics transducers for 20 years with the powerfully concise Ascendant we have added yet another brilliant example of this heritage to our proud stable of products.


Crossover circuitry is hard-wired with surface-only conductors, eliminating deleterious sonic effects of printed-circuit boards and careful crossover control of all magnetic field interaction.

3-1/4" (inch) thick front panel supplies acoustically inert wave-launch platform. Constrained-mode damping system absorbs cabinet vibrations. Distinctive faceted cabinet design provides optimal polar characteristics and acoustically-engineered grille assembly decreases edge diffraction effects



 Driver Complement:

Tweeter :  1” Proprietary Composite Neodymium Tweeter

Woofer :  Two 7" Nomex-Kevlar Composite Cone Woofers

Sensitivity:  89 dB

Nominal Impedance:  4 Ω

Frequency Response:  28 Hz - 25,000 Hz

Recommended Amplifier Power:  50 - 200 Watts

Wiring Methods:  Two Position Binding Post

Dimensions: (H x W x D):940 x 260 x 330 mm (37" x 10" x 13")

Weight:  34 kg (75 pounds) each

Sony PS-LX350H turntable


Belt-drive Stereo Turntable System with Speed control



Motor and Platter

Drive System:  Belt-drive

Motor:  DC motor

Platter:  Aluminum die-cast, 330 mm diameter

Speeds:  33-⅓ and 45 rpm

Wow and Flutter:  less than 0,25% WRMS

Signal-to-Noise Ratio:  more than 50 dB (DIN-B)

Tone Arm

Type:  Static balanced S-shaped tone arm with  detachable headshell

Effective Arm Length:  220 mm

Overhang:  10 mm

Usable Cartridge Weight:  6 g to 10 g


Power Requirements:  120 V AC, 60 Hz (USA); 220 -230 V AC, 50/60 Hz (EU); 110 - 120 V / 220 - 240 V AC 50/60 Hz (other countries)

Power Consumption:  8 W

Dimensions (W x H x D):  450 x 145 x 350 mm (17-111/16" x 5-11/16" x 13-3/4")

Weight:  6,5 kg (14 lb 5 oz)

Adcom GTP-400 tuner/preamplifier

Adcom brings the superior performance of its separates into a price range previously associated with ordinary receivers with the introduction of the new GTP-400 Tuner/preamplifier. By combining the GTP-400 with one of Adcom's power amplifiers, you can now afford the clear sound, powerful dynamics and exceptional performance for which Adcom has been called "legendary" by the critics. The CTP-400 will put more power into your hands than you ever thought possible .. And its sound is truly revolutionary.

Because receivers have limited space, they cannot be equipped with the heavy duty, high-current, high-voltage power supplies available in the best separate components. And if a receiver was so equipped, it would generate unacceptable levels of heat and hum, inevitably degrading all performance parameters. Consequently, the overall performance of receivers is always compromised for the seeming advantage of all-in-one convenience and affordability.


The GTP-400 Tuner/preamplifier eliminates all such compromises.. By dividing the tuner/preamplifier from the power amplifier,, low-current, low-voltage elements are totally isolated from high-current, high-voltage elements ensuring sonic quality and superior performance. And because the GTP-400 is designed to be used with any of Adcom's power amplifiers, you have the advantage of choosing the right amount of power for your needs. If 60 watts per channel will drive your speakers to the level you want, consider our least expensive amplifier, the GFA-535. if you need more power, consider the 100 watt GFA-545 or Adcom's legendary 200 watt GFA-555. for the truly power hungry, the GTP-400 will drive two GFA-555's each bridged in mono, for an awesome 600 watts per channel.


Designers and engineers usually use Class A audio circuits in components where price is no object. Demanded by those who can distinguish outstanding sonic performance from merely average, Class A circuits are employed in the GTP-400's phono and high-level preamp stages. These circuits provide superior resolution and dramatic musicality. It took Adcom's approach to high performance/high value to make Class A affordable.


Several of Adcom's components have been favorably compared to other components costing two and three times more. The GTP-400 promises to keep faith with this tradition of exceptional value by delivering superb performance at a reasonable price.


The Preamplifier Section

Optimum Signal-to-Noise ratios at both the phono and high-level inputs ensure superior performance from your tresured Lp's as well as your new compact discs and a wide range of hifi video sources.

Proprietary linear-gain amplifiers in the high level and phono stages operate in full Class A to provide low distortion, low noise and high speed. High accuracy in the RIAA equalization circuit provides superb sound from high output moving coil or moving magnet phono cartridges. A separate recording selector allows listening to one source while recording another. Feedback tone controls and contouring circuits can fine tune your system to room acoustics or individual listening tastes.


The Tuner Section

Quartz referenced and digitally synthesized , the tuner has an accuracy 0f 0,00025% providing a significant reduction in audible distortion. Eight FM stations and eight AM stations can be programmed for instant retrieval at the touch of a button. Once a station is tuned in, it's locked in without drift. A touch of another button activates the scan mode, up or down. When reception conditions are marginal, a switchable high-blend circuit reduces background noise and fading of FM stereo signals.


The Sound of a Revolution

The price of the GTP-400 with a GFA-535 power amplifier is close to that of a good receiver. But that's as close as they get, beacause no receiver will deliver the wide dynamic range and lasting satisfaction of an Adcom music system. So if you would like to be part of the new movement towards bringing more power into your home, ask your Adcom dealer to demonstarate the GTP-400 with any Adcom power amplifier.

You'll hear what a revolution sound like.



Preamplifier Section

Total Harmonic Distortion:  less than 0,01%

IM Distortion:  0,005%

Frequency Response:  20 Hz - 20 kHz ±0,1 dB

Max. Output Level:  better than 8 volts

Input Sensitivity for .5V Output:

Phono :  0,8 mV

High  Level :  78 mV

Signal-to-Noise ratio:

For .5V Output; Phono :  80 dB

For 2V Output; High level :  better than 95 dB

Output Impedance:  100 Ω

Tuner Section

IHF Sensitivity Mono :  11 dBf

Signal Strength for -50 dB Quieting

Mono :  13,5 dBf

Stereo :  37 dBf

Capture Ratio:  1,7 dB

Alternate Channel Selectivity:  75 dB

Separation at 1 kHz:  50 dB

Total Harmonic Distortion

Stereo at 1 kHz :  0,1%

Signal-to-Noise Ratio:

Mono :  80 dB

Stereo :  75 dB

Frequency Response:  30 Hz - 15 kHz ±0,5 dB

Antenna Impedance:  75 Ω or 300 Ω

Voltage:  117 V at 60 Hz ( 220 V at 50 Hz)

Dimensions (W x H x D):  432 x 80x 325 mm (17" x 3-1/4" x 12-3/4")

Weight:  6,8 kg (15 lbs) shipping

Technics SU-8055K amplifier

The main function of an amplifier is to amplify the input signal without adding to or subtracting anything from the waveforms of the original music. In other often-heard words, the ideal amplifier should be a straight piece of wire that provides gain without phase shifts, transient and other types of distortion over a wide frequency range. Technics sums all this up and calls it "waveform fidelity" and the SU-8055K is a good example of what we have done to make this kind of fidelity a reality. A glance at the specifications will show that what we say is not an idle boast. But we don't want you to just look. Listen to the SU-8055K and we're confident that you'll hear the qualities we're talking about.


DC Power Amplifier Helps Preserve Waveform Fidelity

Waveform fidelity has been greatly enhanced in Technics SU-8055K by the elimination of coupling capacitors not only in the signal path but also in the NFB loop. The lack of something is often a defect. But here, the absence of coupling capacitors means gain all the way down to 0 Hz and phase linearity in the bass frequencies. The result, in this DC power amplifier, is waveform fidelity - the accurate reproduction of musical waveforms.

Big Power and Matching High Fidelity

This amp offers plenty of power even if your special interest is thundering popular music with a lot of bass. It delivers 47 W at 8 Ω, from 20 Hz to 20 kHz with no more than 0,02% Total Harmonic Distortion. Reasons for this high fidelity are manu. A single-packed, low-noise dual transistor is used in the differential amplifier first stage for low noise and precise thermal tracking. Current mirror loading provides high open loop gain without increasing the level of noise. This stage gets help from the emitter-follower, in driving the Class A voltage amplification stage. The end result is minimal distortion in the high frequency range. In addition,, a 2-stage Darlington connection is used in the power stage, comprising a pure complementary circuit that provides high damping factor and low distrtion.

Super Quiet Phono Equalizer

The SU-8055K has an unbelievably high Signal-to-Noise ratio of 85 dB (at 2,5 mV sens. IHF A) when using an MM type cartridge, something rerely found in this amplifier's price class. There is a 3-stage, direct-coupling MM phono equalizer section, with direct coupling of the PNP-NPN transistors, plus a PNP transistor in the emitter follower. Low-output MC cartridges, which are growing in popularity, can also be used without adding an extra pre-preamp (another rarity in a moderate price amp). For the MC input, S/N ratio is 66 dB (at 170 µV sens. IHF A). A few of the reasons for low distortion and high gain are the separation of DC and AC in the negative feedback loop of the equalizer, 100% DC feedback, and the use of narrow tolerance components for negative feedback.

Treble and Bass Controls

An advaanced operatonal IC is used for negative-feedback-type tone controls. Bass and treble can be easily boosted or attenuated to suit individual tastes without  introducing distortion

Accurate Peak Power Indicators

These easy-to-read FL meters are used instead of conventional power output meters. They feature superior accuracy and near-instantaneous response time, and can be switched between two ranges: 0,1 W- 100 W when you are metering for full peak power: 0,01W - 10 W when metering in the more usual listening range. Brightness of the meters is switchable between bright and dim.


Versatile Recording Selector

The SU-8055K has two tape positions on the input selector as well as on the recording selector in a logical and practical layout. With this complete separation, you can do such things as dub from tape to tape while listening to your favorite disc. Or tape from your tuner while listening to music on another tape.

Rugged Stable Power Supply

The power supply is designed to handle the sudden current demands of high energy musical transient without losing sound clarity or introducing transient crosstalk. This is done by using two large-capacity 8,200 µF electrolytic capacitors in the bridged full-wave rectifier circuit and by employing a recently-developed transformer. It also supplies regulated voltage to the phono equalizer circcuit. The transformer coils are floated in a special resin to absorb unwanted vibrations. Even at soft volume levels you can enjoy your favorite music without being bothered by a noisy transformer.

Other Features

Muting circuit eliminates shock noise when the power is turned on and off, providing added speaker protection.

High filter to cut out high frequency noise such as record scratches and tape hiss. Subsonic filter reduces low-frequency noise.

Loudness switch for use when listening at low volume levels. Lows and highs are boosted to make up for "deficiencies" in the way the human ear responds at low volume levels.

Front-panel speaker selector lets you select either of two speaker systems (AorB) both or at once (A + B).




Amplifier Section (IHF)

Continuous Power both Channel Driven

From 20 Hz - 20 kHz

2 x 48 W  at 4 Ω

2 x 47 W at 8 Ω

From 40 Hz - 16 kHz

2 x 48 W at 4 Ω

2 x 47 W at 8 Ω

At 1 kHz

2 x 56 W at 4 Ω

2 x 50 W at 8 Ω

Total Harmonic Distortion:

Rated Power (20 Hz to 20 kHz)

0,03% at 4 Ω

0,02% at 8 Ω

Rated Power (40 Hz - 16 kHz)

0,03% at 4 Ω

0,02% at 8 Ω

Rated Power (1 kHz)

0,03% at 4 Ω

 0,02% at 8 Ω

Half Power (1 kHz) :   0,008% (8 Ω)

Half Power (20 Hz - 20 kHz) :  0,01% (8 Ω)

-26 dB Power (at 1 kHz) :  0,15% (4 Ω)

50 mW Power (at 1 kHz) :  0,2% (4 Ω)

Intermodulation Distortion:

Rated Power (250 Hz : 8 kHz = 4 : 1 ) :  0,03%

Rated Power (60 Hz  : 7 kHz = 4 : 1 SMPTE 8 Ω) :  0,02%

Power Bandwidth( both channel driven -3 dB): 

At 4 Ω :  5 Hz - 30 kHz

At 8 Ω :  5 Hz - 50 kHz

Residual Hum and Noise:  0,8 mV (0,8 mV, IHF  A)

Damping Factor:  18 (4 Ω);  36 (8 Ω)

Headphones Output Level/Impedance:  440 mV/330 Ω

Load Impedance

Main or Remote:  4 Ω - 16 Ω

Main and Remote:  8 Ω - 16 Ω

Input Sensitivity/Impedance

Phono MM :  2,5 mV/47 k Ω

Phono MC :  170 µV/100 Ω

Tuner, Aux :  150 mV/47 k Ω

Tape 1, Rec/Play :  180 mV/33 k Ω

Tape 2 :  150 mV/33 k Ω

Phono Max.input Voltage (1 kHz RMS): 

MM :  150 mV

MC :  6,5 MV

Signal-to-Noise Ratio

Rated Power (4 Ω)

Phono MM:  73 dB (85 dB IHF A)

Phono MC :  60 dB (66 dB, IHF A)

Tuner, Aux, Tape :  86 dB (97 dB, IHF A)

-26 dB Power (4 Ω)

Phono MM :  62 dB

Phono MC :  58 dB

Tuner, Aux, Tape :  63 dB

50 mW Power (4 Ω)

Phono MM :  58 dB

Phono MC :  56 dB

Tuner. Aux, tape :  60 dB

Frequency Response;

Phono :  30 Hz - 15 kHz (RIAA standard curve ±0,5 dB)

Tuner, Aux, Tape :  10 Hz - 60 kHz (-1 dB) ±0,5 dB (20 Hz - 20 kHz)

Tone Controls

Bass :  50 Hz +10 dB /-10 dB

Treble ;  20 kHz +10 dB / -10 dB

High Filter:  7 kHz, -6 dB/oct

Subsonic Filter:  30 Hz, -6 dB/oct

Loudness Control (Volume at -30 dB):  50 Hz , +9 dB

Output Voltage/Impedance

Rec Out :  150 mV

Rec /Play :  30 mV/82 k Ω

Channel Balance

Aux (250 Hz - 6300 Hz) ±1 dB

Channel Separation

Aux (1 kHz) 60 dB


Power Consumption: 500 W

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

Dimensions (W x H x D):  430 x 142 x 255 mm 916-15/16" x 5-19/32" x 10-1/32")

Weight:  7,7 kg (17,0 lb)

MBL 1431 CD player

 MBL 1431 CD Player

The MBL 1431 CD player brings a new lease on life to your CDs opening up a stunning musical spectrum. The upsampling function enables the conversion of the digital signal from 16-bit/44,1 kHz to the DVD standard of 24-bit/96 kHz. It makes listening to CDs a fascinating experience.



Sampling:  44,1 kHz (96 kHz Upsampling)

Resolution:  16-bit (24-bit Upsampling)

Digital Outputs:  RCA

Analog Outputs:  RCA, XLR

D/A Converter:  Advanced Segment Architecture

Signal-to-Noise Ratio:  110/112 dB

Power Consumption:   less than 50 VA

Dimensions (W x H x D):  450 x 100 x 410 mm (17,7" x 3,9" x 16,1")

Weight:  10 kg (22 lbs)

MBL 4006 pre-amplifier

MBL 4006 Preamplifier

The MBL 4006 boasts a sonic subtlety and elegance that no listener will be able to resist. It incorporates cutting-edge technology that gives the 4006 outstanding musical sensitivity. The power technology was specially designed to ensure authoritative bass sounds. Meanwhile, the internal connections are made of monocrystaline OCC copper to ensure high precision, silky trebles. We devoted our complete attention to premium sound.



Inputs:  XLR, 2 CD, 2 high level, processor bypass, 2 option slots

Outputs:  2 RCA, XLR

Frequency Range:

CD :  DC - 600 kHz

High Level :  DC - 600 kHz

Output Impedance:  100 Ω

Noise Distortion:  less than 0,0007%

Signal-to-Noise Ratio:  98/101 dB (CD)

Input Sensitivity:  315 mV

Input Impedance: 

CD :  5 k Ω

High Level :  50 k Ω

Channel Separation:  90 dB

Power Consumption:  20 VA max.

Dimensions (W x H x D):  450 x 100 x 410 mm (18" x 4" x 16")

Weight:  10 kg (22 lbs)

MBL 8006B power amp


MBL 8006 B Power Amplifier

This compact gem is impressive, using less muscle that offers incredible musicality. The MBL 8006B is the kind of output stage that gives the sound clarity highest priority. An ingenious circuitry design ensures outstanding dynamics and performance, both of which are reflected in a powerful but sensitive sound panorama.


Peck Pulse Power [Mono] :  500 W

Rated Power [Mono] : 

120 W at 8 Ω

185 W at 4 Ω

Output Voltage:  35 V

Output Current max. :  20 A

Input Sensitivity:  1,5 V (185 W, 4 Ω)

Signal-to-Noise Ratio:  115 dB

Total Harmonic Distortion:  less than 0,006%

Damping Factor:  300 (4 Ω)

Power Consumption:  47 VA (Idle),  450 VA (max)

Dimensions (W x H x D):  450 x 100 x 410 mm (18 " x 4" x 16")

Weight:  14 kg (30 lbs)