Tannoy GRF Autograph Enclosure

As a fitting complement to the Tannoy "Fifteen" Dual Concentric Unit, our Research Laboratories now give you the expanding source Loudspeaker System. This unique enclosure embodies all of the well-known advantages of Horn Loading, e.g., excellent bass radiation and transient response, but suffers from none of the special distribution defects associated with conventional Horns. The overall efficiency of the system is also high with the result that not more than 3 watts peak are required for even the largest living room. The effective source size of the system varies with frequency, below 200 c.p.s. the L.F. Diaphragm of the Dual Concentric is horn loaded both front and rear; from 200 c.p.s. to 1,000 c.p.s. the front loading only is effective, thus giving a reduction in apparent source size. Above 1,000 c.p.s. the horn loaded high frequency unit integral with the Dual Concentric commences to radiate giving all of the advantages of a small non-directional source. The result of this entirely new form of horn loading is that while large orchestral and choral works have a sense of spaciousness and breadth, chamber music and solo vocal music possess that intimacy very necessary for their full enjoyment. Once again the Tannoy organisation with over a quarter of a century's experience in Sound Reproduction have produced a Loudspeakers System by which others will be judged.

Specifications

Power handling Capacity: 50 watts (integrated programme material)

Frequency Range: 30 cps - 20,000 cps (30 HZ - 20,000 Hz) ±4 dB

Conversion Efficiency: In excess of 20% over entire range. (four to five times that of conventional systems)

Rear Horn Development: Effective 20 cps - 250 cps

Front Horn Development: Effective 250 cps - 1,000 cps

Polar Distribution 60° inc. Angle: - 4 dB at 10,000 cps

Overal Dimensions:

Height: 4 ft. 10½ in.

Width at walls: 3 ft. 7 in.

Frontal width: 29½ in.

Depth (front to corner): 26½ in.

Finish: Hand rubbed mahogany, walnut or oak. Wide choice of contemporary easy-clean plastic fabrics.

Yamaha K-960 (1981)

when yamaha's audio engineers decided to design a truly high performance cassette deck, they didn't overlock any details. First, they chose a two-motor transport, but redesigned the system to eliminate the instabilities of conventional two-motor designs. For the Rec/Playback head, they used the finest material available - Sendust - formed by a unique Yamaha process for absolute purity. With 5-layer core lamination and low impedance design, this head is superior to ordinary types in all respects. And for the best possible dynamic range and signal-to-noise ratio, the dbx system was included.

Add to this features like fine bias adjust, focus switch, metal compatibility and Dolby NR, and the result is the K-960 - a triumph of cassette deck engineering.

Specification

Frequency response: 40 - 22,000 Hz (metal tape)

S/N ratio: 100/60 dB (dbx on/off, metal tape)

Wow and flutter: 0,028%

Input sensibility: 50 mV

Input impedance: 100 kohms

Output sensibility: 340 mV

Dimensions (W x H x D): 435 x 141 x 304 mm

Weight: 8 kg

TEAC A-7030

Teac A-7030U Stereo Tape Deck.

An all-solid-state. Single-direction, 2-track record/playback7erase, plus ¼-track playback stereo tape deck. The A-7030 is designed for the demanding professional or the discriminating

audiophile. This superb deck has a capacity up to the 10½" NAB reel size and operates at 15 or 7½ ips, with performance comparable to that of the finest professional sound studio equipment.

Wow and flutter are an exceptionally low 0,05%, frequency response is 30 to 20,000 Hz and the

signal-to-noise ratio is a high 58 dB. The unique TEAC Proline ™ hyperbolic heads, a massive inertial flywheel for tape travel stabilization and the rugged, precise TEAC 3-motor transport ensure the utmost in sound quality. Operation is fast and always under your control with our symmetrical touchbutton control system and solenoid/reley actuators. The A-7030 includes

instant off-the-tape monitoring, mic-line mixing, pushbutton high speeed cueing and automatic rewind and shut-off. Options such as a full remote control and floor-standing wooden console make it even more versatile.

Specifications

TEAC A-7030

Tape transport

Heads: Four separate heads assembled in plug-in unit

Standard:

2-track erase, 2-track record, 2-track forward playback, 4-track forward playback

With optional THA-75 Head assembly:

4-track erase, 4-track record, 4-track forward playback, 2-track forward playback

Erase: 2,2 kohms at 100 kHz, Erase current … approx. 35 mA

Record: 1,6 kohms at 10 kHz Bias current… approx. 1,1 mA

Reel Size: 10½" max. NAB reel

Tape Width: Standard ¼ inch tape

Tape speed: 15 and 7 ½ ips (±0,5&)

Motors: one 478 Pole dual speed hysteresis synchronous motor for capstan drive, two 6-pole eddy current motors for reel drive

Wow and Flutter (measured according to weighted NAB standard using TEAC flutter free tape):

15 ips: 0,05%

7½ ips: 0,08%

Fast Winding Time: Approx. 200 sec. For 3,600 ft (10½" NAB reel)

Starting Time: 1 sec. To reeach stable speed

Controls: The tape motion is controlled by four pushbuttons; rewind, fast, forward and stop. Tape speed is selected by the motor winding switch.

Pre-Amplifiers

Frequency Response (overall from recording input to playback output):

15 ips: 40 to 20,000 Hz, ±2 db

7½ ips: 50 to 15,000 Hz, ±2 dB

Signal-to-noise ratio (Peak record level to unweighted noise):

58 dB for 2-track,

55 db for 4-track

Crosstalk Rejection:

45 dB channel to channel at 1 kHz,

40 dB between adjacent tracks at 100 Hz

Input Microphone: high impedance unbalanced, 10 kohms, o,5 mV minimum

Line Input: 200 kohms, 0,1 V minimum

Output: 1 V for load impedance of 100 kohms or more

Equalozation (NAB equalization):

15 ips: 50µ sec

7½ ips: 50µ sec

Bias Frequenct: 100 kHz push-pull oscillator

Erasing Effect: 60 dB at 15 ips tape speed

Distortion at 1Hz: 1,5% at operating level

Monitoring Headphones: Low impedance, 8 ohms

Transistors (silicon):

4 x 2SC369, 4 X 2SC372, 2 X 2SC491, 2 X 2SA494, 8 X 2SC733, 4 X 2SC732

Power Requirements: 100/115/200/220/240 V AC, 50/60 Hz

Power Consumption: 150 W max.

Dimension(H x W xD): 20⅞"x 17½" x 8¼")

Weight: 62 lbs

Kenwood KX-2060 (1981)

Every advanced design feature of the KX-2060 is designed to provide you with the highest quality in cassette tape recordings.
Features: Metal tape capability, Fine-bias tuning, 3-head design, Double Dolby noise reduction with LED indicator, Three position Bias selector, Three position Equalization selector, All electronic Fluoroscent display, Memory Index, MPX filter, Three digit tape-counterEvery advanced design feature of the KX-2060 is designed to provide you with the highest quality in cassette tape recordings.
Features: Metal tape capability, Fine-bias tuning, 3-head design, Double Dolby noise reduction with LED indicator, Three position Bias selector, Three position Equalization selector, All electronic Fluoroscent display, Memory Index, MPX filter, Three digit tape-counter
Kenwood engineers have again advanced the art of cassette deck design with the remerkable KX-2060, a superbly engineered deck with performance characteristics equal to the best available today. The KX-2060 incorporates many advanced design features such as the ability to record and playback every kind of tape - including the latest high-output metal tape. A three-position tape equalization selector and a variable fine-bias adjustor using two oscillators, plus calibratable double Dolby noise reduction circuitry, ensure that every tape will perform to its limits. Moreover, the 3-head design offers important advantages both in optimum sound quality and monitoring convenience. The extraordinary electro-magnetic performance of the KX-2060 is fully complemented by mechanical excellence. A new constant tension tape transport, and Kenwood's own rugged two-belt drive system, all ensure that nothing stands in the way of the highest quality recording and playback of tapes. The KX-2060 is also very easy to operate, and features electronic push button controls and advanced fluorescent peak level meters. Its carefully laid out front panel is designed to match equivalent Kenwood amplifiers and tuners.

Specifications
Type: Front Loading Stereo Cassette Deck with Dolby System
Track System: 4-track, 2-channel Stereo/mono Record and Playback
Recording System: AC Bias (Bias Frequency: 105 kHz)
Erasing System: AC Tape Speed: 4,76 cm/sec. (1-7/8 ips)
Heads: Three Ferrite Heads
1x Record/Playback
1x Erasing
Motor: Electronicaly Controlled DC Motor
Fast Winding Time: Approx. 80 sec. With C-60 tape
Frequency Response:
Normal Tape: 20 Hz - 18,000 Hz (25 - 17,500 Hz, ±3 dB)
CrO₂ Tape: 20 Hz - 19,000 Hz (25 - 18,000 Hz , ±3 dB)
Metal Tape: 20 Hz - 19,000 Hz (25 - 18,000 Hz, ±3 dB)
S/N Ratio (Dolby ON over 5 kHz):
Normal Tape: 66 dB
CrO₂ Tape: 69 dB
Metal Tape: 70 dB
S/N Ratio (Dolby Off):
Normal Tape: 56 dB
CrO₂ Tape: 59 dB
Metal Tape: 60 dB
Total Harmonic Distortion: Less than 1,0% (at 1 kHz, 0 VU with Metal Tape)
Wow & Flutter: 0,04% (WRMS)
Input Sensitivoty/impedance:
Line x 2: 77,5 mV/150 kΩ
DIN x 1: 1,4 mV/10 kΩ
Microphones x 2: 0,19 mV/56 kΩ
Output Level/Load Impedance:
Line x 2: 775 mV (0 VU)/100 kΩ
DIN x 1: 775 mV (0 VU)/ 100 kΩ
Headphones: 48,9 mV/8 Ω
Power Requirement: AC 120 V, 60 Hz
Power Consumption: 40 watts
Dimensions (W x H x D): 440 x 153 x 377 mm (17-5/16 x 6 x 14-7/8 inch)
Weight: 9,3 kg (20,5 lbs)

dbx Dynamic Range Expander

A dbx Dynamic Range Expander will significantly improve the sound quality of all your conventional records and tapes, and even FM broadcasts. First, it will increase the dynamic range of your music by as much as 50% to give you much of the excitement and impact of a live performance.

Second, a dbx Dynamic Range Expander can reduce annoying tape hiss and record surface noise by as much as 20 dB. Such a marked reduction in these distracting noises will dramatically increase your listening pleasure.

In short. you'll hear a sound quality you've never heard before from your entire music library. All because of the dramatic strides dbx has made with this remarkable technology.

A dbx Dynamic Range Expander is available for every system and every budget.

dbx 3BX Specifications

Expansion Ratio: Continuously adjustable from 1.0 to 1.5 (0 to 50% increase)linear in decibels

Dynamic Range: 100 dB (peak signal to weighted background noise)

Input Impedance: 50 kΩ

Input level: 300 mV nominal

Input level: 7 V RMS maximum

Output Impedance: 100 Ω (designed to drive 5 kΩ or greater)

Output Level: 7 V RMS (max. 20 Hz - 20 kHz)

Frequency Response: 20 Hz - 20 kHz ±0,5 dB at 1,0 expansion

Equivalent Input Noise: -85 dBV (unweighted, 20 kHz bandwidth, referenced to 1 V)

Total harmonic Distortion: 0,1%, typical at 1.0 expansion 20 Hz to 20 kHz

IM Distortion: 0,15% typical

Power Line Requirement: 117 V AC, 50 - 60 Hz

Power Line Consumption: 30 W

Dimensions (W x H x D): 17¾" x 3¾" x 10¼" (45,1 x 9,5 x 26,0 cm)

Weight (shipping): 12 lbs (5,45 kg)

dbx 3BX & 3BX-R

3BX

The 3BX is the most advanced dynamic range expander ever developed. It restores much of the drama, impact and excitement of a live performance by making loud passages louder and soft passages quieter.

Bass, midrange and treble frequencies are sensed in the music signal and expanded individually from extraordinary clarity of soud from even the most complex musical material. Three rows of LED's are used to monitor the degree of expansion in each of the three frequency ranges. An expansion level control lets you want, up to 50%. ANd, with the transition level control, you can adjust the threshold of expansion to vary the level above which the music signal is upward expanded. The 3BX is the most sophisticated and flexible dynamic range expander on the market. With, you can bring new life to your entire record and tape collection as well as dramatically increase your enjoyment of radio broadcasts. The 3BX is provided with a tape monitor loop to replace the one used on your receiver or preamp.

3BX-R remote Control

The 3BX-R not only allows you to operate your 3BX Dynamic Range Expander at a remote location, it also gives you more control capability. It includes a release time of the 3BX to the type of music you're playing - fast for high energy rock, slow for quiet symphonies. There's also a fade switch for automatically lowering the music level for fade down or raising the level for fade up - ideal for making professional fades during recording. Other features include a master volume control for your entire system, a 3BX bypass switch, and LED displays that indicate the operational mode of the 3BX. A 25-foot cable comes with the 3BX-R, and a 25-foot extension cable is available as an option.

3BX Specifications

Expansion Ratio: Continuously adjustable from 1.0 to 1.5 (0 to 50% increase)linear in decibels

Dynamic Range: 100 dB (peak signal to weighted background noise)

Input Impedance: 50 kΩ

Input level: 300 mV nominal

Input level: 7 V RMS maximum

Output Impedance: 100 Ω (designed to drive 5 kΩ or greater)

Output Level: 7 V RMS (max. 20 Hz - 20 kHz)

Frequency Response: 20 Hz - 20 kHz ±0,5 dB at 1,0 expansion

Equivalent Input Noise: -85 dBV (unweighted, 20 kHz bandwidth, referenced to 1 V)

Total harmonic Distortion: 0,1%, typical at 1.0 expansion 20 Hz to 20 kHz

IM Distortion: 0,15% typical

Power Line Requirement: 117 V AC, 50 - 60 Hz

Power Line Consumption: 30 W

Dimensions (W x H x D): 17¾" x 3¾" x 10¼" (45,1 x 9,5 x 26,0 cm)

Weight (shipping): 12 lbs (5,45 kg)

dbx 2BX

2BX

If you want dynamic range expansion technology at a lower cost than the 3BX, then the 2BX is the model for you. Its somewhat simpler circuitry divides the frequencies into two bands instead of three. Music integrity of the bass and treble is maintained so that dynamic range of highly percussive music, either rock or classical, without causing the high and middle frequencies to track the low frequency dynamics of the music. The 2BX has two rows of LED's for monitoring expansion in each of its bands.

As with the 3BX, you can select the expansion you want (up to 50%) and adjust the transition level using the two controls provided for these purposes. Except for the most critical applications, the 2BX offers an ideal choice for increasing the dynamic range of your stereo system and your enjoyment of recorded music. Like the more expensive 3BX, the 2BX features PRE/POST recorder selection to allow you to expand either before or after the tape recorder connected to the 2BX. This tape loop replaces the one used on your receiver or preamp.

Specifications

Expansion Ratio: Continuously adjustable from 1.0 to 1.5 (0 to 50% increase)linear in decibels

Dynamic Range: 100 dB (peak signal to weighted background noise)

Input Impedance: 50 kΩ

Input level: 300 mV nominal

Input level: 7 V RMS maximum

Output Impedance: 100 Ω (designed to drive 5 kΩ or greater)

Output Level: 6 V RMS (max. 20 Hz - 20 kHz)

Frequency Response: 20 Hz - 20 kHz ±0,5 dB at 1,0 expansion

Equivalent Input Noise: -85 dBV (unweighted, 20 kHz bandwidth, referenced to 1 V)

Total harmonic Distortion: 0,1%, typical at 1.0 expansion 20 Hz to 20 kHz

IM Distortion: 0,15% typical

Power Line Requirement: 117 V AC, 50 - 60 Hz

Power Line Consumption: 20 W

Dimensions (W x H x D): 17¾" x 3¾" x 10¼" (45,1 x 9,5 x 26,0 cm)

Weight (shipping): 8,3 lbs (3,8 kg)

dbx 1BX

1BX

Like its 3BX and 2BX counterparts, the 1BX can increaste the dynamic range of music from records, tapes and radio broadcasts by a factor of up to 50%. Its RMS level detector incorporates an infrasonic filter to prevent mistracking caused by turntable rumble or record warp. Ten LED's monitor upward and downward expansion and, as with the 3BX and 2BX, a transition level is provided to select the level above which the music signal is upward expanded and below which it is downward expanded. because of its less complex circuitry, the 1BX is priced so anyone can affard the benefits of increased dynamic range. The1BX provides a tape monitor loop to replace the one used on your receiver or preamp.

Specifications

Expansion Ratio: Continuously adjustable from 1.0 to 1.5 (0 to 50% increase)linear in decibels

Dynamic Range: 100 dB (peak signal to weighted background noise)

Input Impedance: 50 kohms

Input level: 300 mV nominal

Input level: 7 V RMS maximum

Output Impedance: 100 ohms (designed to drive 5 kohm or greater)

Output Level: 6 V RMS (max. 20 Hz - 20 kHz)

Frequency Response: 20 Hz - 20 kHz ±0,5 dB at 1,0 expansion

Equivalent Input Noise: -85 dBV (unweighted, 20 kHz bandwidth, referenced to 1 V)

Total harmonic Distortion: 0,1%, typical at 1.0 expansion 20 Hz to 20 kHz

IM Distortion: 0,15% typical

Power Line Requirement: 117 V AC, 50 - 60 Hz

Power Line Consumption: 10 W

Dimensions (W x H x D): 11" x 3¾" x 10¼" (27,8 x 9,5 x 26,0 cm)

Weight (shipping): 4,5 lbs (2 kg)

Roksan Shiraz

One of the most important aspects of Record Player cartridge design is the diamond tip of the stylus.

It is this jewel which has to retrieve information often represented by variations that measure millionths of an inch.

If the profile of this diamond is cut to the wrong shape it will damage records and reduce the amount of retrievable information.

The moving coil Shiraz cartridge has a stylus which we believe is the world's best diamond profile design.

The Swiss made Gyger II has a super fine line profile offering excellent tracking ability with stunning detail retrieval and low surface noise.

The body is made from solid aluminium alloy and fitted with a robust broadcast standard generator uniquely fixed to the body with three spikes giving it precise alignment and coupling without using distortion inducing adhesives. Excessive cantilever movements at certain frequencies are damped by the capacitors mounted directly to the generator over the coil where they accurately preserve the minute signal. The Shiraz produces relatively high output for a moving coil design, which is important for a good signal to noise ratio and channel separation, but requires careful matching to preamplifier phono stage.

Roksan have employed complex engineering techniques in the Shiraz cartridge in order to extract the most information from the groove of your records whilst never damaging the groove itself.

There are several main areas where the Shiraz distinguishes itself from other cartridges:

Astonishing level of detail.

Ease of tracking highly modulated grooves.

Uncompressed dynamic range.

Flat frequency response to beyond 30 kHz allowing harmonics to be naturally reproduced.

These qualities are directly related to sound mechanical and electrical engineering principles.

The Shiraz utilises a broadcast standard moving coil generator rigidly mounted, with 3 spikes, into a solid machined aluminium alloy body.

The Shiraz is fitted with a super fine line stylus profile.

The Shiraz is critically damped balanced cartridge, with ultra low noise surface mount capacitors fitted directly next to the generator's coils.

The Shiraz cartridge is particularly sensitive to precise alignment. The fine line stylus requires fine Vertical Tracking Angle adjustment.

SPECIFICATION

Type: Moving coil

Output:

0.21 mV/cm/sec (RMS)

1.05 mV @ 5cm/sec recorded velocity

Stylus: Super fineline - Gyger II

Cantilever: Aluminium Tube

Tracking weight: 2,2 - 2,5 (2,4 grams recommended)

Cartridge body: 5 axis machined solid aluminium alloy

Generator fixing: Unique 3- point rigid fixing, spiked to body (without adhesive)

Cartridge fixing: Standard 0,5 inch centres (12,7mm)

Recommended load: 30 - 100Ω (100Ω recommended)

Coil impedance: 24Ω

Frequency response: 15 Hz - 30 kHz

Channel balance: Within 1dB

Channel separation: 30 dB

F I M: < 0.5%, 19μ

Cartridge weight: 8,2 g

McIntosh MC 1000 Mono Power Amp

McIntosh Is thought by many to have invented the high fidelity audio amplifier in 1949. And, through continuous research, McIntosh has been reinventing it ever since with new developments and refinements that bring us ever closer to the goal of absolute perfection in musical reproduction. This proven amplifier technology, together with a number of technical innovations, has resulted in audio amplifiers that are capable of meeting the challenge of moder performance requirements.

McIntosh power output wattmeters indicate the true power that the amplifier delivers to the loudspeakers, regardless of speaker loads or impedance variations. Driven by circuitry that constantly measures both voltage and current, these illumniated, peak responding meters are extremely acurate, responding to 95% of full scale with only one cucle of a 2,000 Hz tone burst.

Power Guard a patented McIntosh circuit design , eliminates harsh clipping distortion without sonic side effects Not a “soft clipping” circuit or a limiter, Power Guard has no effect prior to the clipping point of the amplifier. A waveform comparison circuit continuosly monitors, the output signal and compares it to the input signal. Should distortion appear in the output signal, Power Guard acts by reducing the level of the input signal until distortion is reduced below clipping then restores the amplifier to full gain. because it is so brief, only thousandths of a second, you won’t hear the gain reduction. power Guard assures your listening pleasure and protects your loudspeakers from the damaging effects of clipping distortion.

McIntosh has provided their unique output autoformers in all of their “flagship” power amplifiers since the beginning of the “solid state” era. McIntosh output autoformers enhance amplifier performance by providing optimum loading of the output devices. This assures that maximum current may be delivered by the output circuit without exceeding the safe limits of the output devices. Additionally, autoformers provide expanded operational flexibility and contribute to long, consistent performance with far greater reliability.

McIntosh MC 1000 - The Power Amplifier for the most discriminating music listener.
features:
Dual Balanced advanced circuit design
McIntosh Output Autoformer for perfect amplifier-loudspeaker interface
2, 4 and 8 ohm output impedances
Gold plated, multi-way output terminals
1% metal film resistors and polypropylene capacitors
Peak output current of 160 amperes
An 8 inch illuminated output meter reads the true Power Output by measuring both output voltage and current simultaneously.
Balanced and Unbalanced inputs
Exclusive McIntosh Power Guard non clipping circuit

Specifications:
Power output: 1000 W mono
Distortion, IM & Harmonic: 0,005%
Output indicators: Meters
Output interface: Autoformers
Dimensions (W x H x D): 438 x 264 x 510 mm (17¼” x 10⅜” x 20⅛”)
Weight: 47,6 kg (105 lbs) net

Pioneer HPM-100 (1976)

One of today's best speakers is famous for its highs. Another has been said to deliver the best bass and a third is loved for its mid-range performance. Each "best" speaker is terriffic in its own particular area because it's engineered that way. To please people who are hugh up on a particular kind of sound.

The new HPM-100 speaker system is different. It produces superlative sound across the whole spectrum. That is not an accident.

Originally it was a challenge to our engineers, specialize in perfecting everything. Their response was to create a whole new universe of loudspeaker technology.

For the superhigh frequency range, to begin with, they gave the HPM-100 a radically new kind of supertweeter, made with a newly developed substance called High Polymer Molecular film. This HPM film is used to convert electrical energy into sound. It does so with a degree of accuracy that was previously only a theory.

That's a lot to claim, but these speakers really are that different from everything that has gone before. They work without any magnets , voice coil or domes. In fact without any moving parts at all.

The tweeter, mid-range driver and woofer all depart just as radically from conventional speaker technology. The key innovation in all of them is a process that turns out speaker cones heavily impregnated with carbon fibres. They are rigid and tough, but still thin and lighf. As a result, each of them can move easily, like a well-oiled piston, to produce high and middle and low frequencies that are clearer, more natural and far more transparent than anything you'd expect to hear from a four-way speaker system.

Pioneer unique carbon-fiber blend woofers

Pioneer's success with its unique cone material called carbon-fiber blend is now well known and the realistic sound of Pioneer speakers owe much to its use. Because the material is lighter in weight than comparable cone paper type materials, but ideally rigid it responds more trouthfully to low frequency impulses.

High-Polymer Super Tweeter

There are five outstanding advantages of this unique super-high-frequency driver unit which make it the ideal transducer:

• Its semicylindrical form covers a wide 180 degrees range ending conventional tweeter directionality.
• Its ultra-thin, high-polymer film diaphragm vibrates in a "breathing motion" over its entire surface.
• It is effectively damped by elastic materials to prevent the deterioration of its best characteristics and to end excessive harmonic distortion.
• It has a high power handling capability
• Its sound is crisp, natural and clean

Computer Determined Cabinets and High Efficiency Networks

Having the best loudspeakers serves no real purpose unless the cabinet design is well planned and incorporates crossover networks of the highest quality.

The crossover network, using metallised paper capacitors and ferrite core coils assure gentle crossover slope of 8 dB per octave.

Pioneer has chosen two different techniques of cabinet design; bass reflex and infinite baffle type. Each technique has been perfected and is chosen to fulfill every specificeventuality, the cabinet itself was designed with the assistance of computers in scientifically determined structural assembly.

Speakers to live with

Pioneer has not forgotten that a speaker system is also a piece of furniture. Expensive furniture that you may wish to keep for a long time. The style was purposely chosen to adapt and harmonize with a multitude of decors. Close inspection will reveal the true quality of your Pionner speakers, not for nothing does Pioneer have the reputation of producting the best finished on the market.

Specifications

Enclosure type: bass-reflex, 4-way, 4 speakers

Speakers:

1 Woofer: 300 mm (12") cone

1 Midrange: 100 mm (4") cone

1 Tweeter:, 45 mm (1¾") cone

1 Super-Tweeter: high polymer

Crossover frequency: 3000/4000/12,000 Hz

Frequency range: 30 Hz - 25 kHz

Sensitivity: 92,5 dB/W at 1m distance

Operating power (to get 96 dB SPL at 1m distance): 2,1 W (DIN)

Music power: 100 W (DIN)

Nominal impedance: 8 ohms

Dimensions (W x H x D): 390 x 670 x 393 mm (15⅜" x 26⁶/₁₆" x 15¹⁵/₃₂")

Weight: 26,7 kg (58 lbs 12 oz)

Hitachi DA-1000 (1983)

Hitachi has crossed the threshold of a music lover's dream. Perfect concert reproduction is now a reality. It is all possible due to the new Hitachi DA-1000, one of the world's first commercially available visual audio disc players, it is an exciting new form of sound system that relies on digital audio signal encoding rather than an analog system. This allows performance levels that far exceed even the finest conventional turntable. The result is pure, clean sound absolutely faithful to the original performance.

The Hitachi DA-1000 plays compact digital audio discs, the disc format adopted by all on the major audio manufacturers. A compact disc is capable of storing an uninterrupted 60 minutes of beautiful music on a single side.

The digital disc is perfectly smooth, its clear plastic protective surface eliminates the annoying effects of dust, scratches and wear. The music you hear will sound exactly the same as when the artist originally recorded it, the first time you play the disc as well as the 1000th.

The DA-1000 was cratted to ensure superior performance as well as optimum convenience. The vertical design offers the space saving benefits of component rack installation, as well as the ease of a cassette-style front loading system. The DA-1000 delivers a comprehensive playbac control, with a simple touch of the user may elect to pick-up Forward or Reverse,cue, Repeat and Auto Search. The DA-1000 also has the Program Playback a feature which allows the user to program up to 15 selections for playback in any sequence automatically.

One listen is worth a thousand words. Come and witness for yourself the superior sound of the Hitachi DA-1000.

Features Function

Random memory search (max. 15 track)

Sejl-program search system

Skip play, memory stop, pause, reaeat, output volume

Variable level headphone jack,

2 sets output terminals (variable and fixed level)

Conecting pin cords

Displays:

Play position (5 min. steps), number of tracks, playing track number, elapsed play time, output volume level.

Specifications

Number of channels: 2 (stereo)

Disc diameter: 120 mm

Max. playing time: 60 min. /one side

Frequency response: 5 Hz - 20 kHz, ±0.5 dB

Dynamic range: 93 dB

Signal-to-Noise ratio: 94 dB

Total Harmonic Distortion: 0,003%

Separation: 92 dB at 1 kHz

Wow and Flutter: less than measurable limits (crystal accuracy)

Output voltage: 2.1 V RMS (with full scale)

Sampling frequency: 44,1 kHz

Quantization number: 16-bit linear/channel

Transmission bit rate: 4,3218 Mb/sec

Pick-up system: object lens drive system optical pick-up

Object lens drive system: Two-dimensional parallel drive

Optical source: Semiconductor laser

Wavelength: 790 mm

Power requirements: 120/220/240 V, 50/60 Hz

Power consumption: 25 W - 28 W

Dimensions (W x H x D): 320 x 145 x 234 mm

Weight: 5,6 kg

Kettle Drum Speaker of Bozak B-201 (1950)

The distinctive hemispherical shell of the Bozak Kettle Drum Speaker is not just an attractive enclosure, not just a rigid baffle, but an integral, functioning part of new concept in sound reproduction. Actual comparative tests are substantiated by critical listening in proving that the acoustically treated Kettle Drum baffle is unsurpassed in tonal realism and listening ease.

Unlike conventional enclosures, the Kettle Drum does not have a sharply peaked cavity resonance. Thus, all types of sound, instrumental an vocal, are heard without muffling or other distortion. Only a hemispherical baffle is devoid of standing waves. Only the Bozak Kettle Drum employs a hemispherical "tympani" baffle.

Features:

True Pitch, True Tympan Bass

Distinctly Natural Treble

Exceptionally Low Resonance

Outstanding Transient Response

Attractive, self-contained Enclosure (32" dia. spun steel acustically treated baffle with lifting handle, circular panel and tripod base)

Matched Bozak Team Recreates Audio Spectrum

From one end of the useful audio spectrum to the other, from the plucked string of a bass viol to the uppermost coloratura tones, only true, undistotred pitch is reproduced by the Kettle Drum. The 12-inch Bozak woofer, noted for its robust, life-like bass, and the Bozak dual tweeter, distinguished for its non-piercing highs, combine in the "tympani" shell to offer a tonal depth and balanced roudness that is best described as a "3-dimensional" effect.

Effective Crossover Built In, No Extra Network Needed

Response characteristics of the specially damped woofer and dual tweter are such taht an elaborate crossover filter is unnecessary. A built-in 4 mfd. condenser, used in series with the tweeter comprises the crossover network. This simplification is made possible beacuse identical velocities of propagation of both highs and lows permit no annoying phase distortion.

Let Tour Ear Compare

For all applications demanding highest quality sound reproduction at moderate power levels, try the speaker that makes you feel "you are there" - Bozak Kettle Drum, Model B-201. If you have not yet had the opportunity to let your ear compare, let your eye compare the following characteristics with those of speakers costing 2 --3 times as much.

Specifications

Frequency Response: 40 - 13,000 Hz (with useful response to 16,000 Hz)

Crossover: 2000 Hz

Input: 12 watts, peak to 18 watts

Input Impedance: 6 - 8 ohms

Horizontal dispersion angle: 120 ° at 10 kHz

Overall Height: 33 inch

Depth front to back: 19½ inch

Weight: 49 lbs net

Marantz SR 9000G (1982)

Specifications

Audio Section

Power output per channel:

180 W at 4 ohms DIN

145 W at 8 ohms DIN

165 W at 4 ohms RMS

130 W at 8 ohms RMS

Total Harmonic Distortion: 0.03% at 8 ohms RMS

Damping Factor: 70 ( 8 ohms, 1 kHz)

Frequency Response:

Phono (RIAA): 20 - 20,000 Hz, ±0,5 dB

Aux: 8 - 65,000 Hz , ±2 dB

Signal to Noise Ratio:

Phono: 85 dB (7,75 mV, 20 V output)

Aux: 98 dB ( vol. max., 20 V output)

Input Terminals:

Phono: 2,7 mV/47 kohms

Aux: 160 mV/20 kohms

FM Tuner Section

Frequency Range: 87,5 - 108 MHz

Usable Sensitivity:

DIN Mono (S/N 26 dB, 75 ohms): 0,85 μV

DIN Stereo (S/N 46 dB, 75 ohms): 19 μV

Alternate Channel Selectivity: 70 dB at 98 MHz

Signal to Noise Ratio at 98 MHz:

Unweighted Mono/Stereo: 75/67 dB

Weighted Mono /Stereo: 77/72 dB

MW Tuner Section

Frequency Range: 515 - 1650 kHz

Usable Sensitivity (20 dB, S/N 30% mod. 1 MHz): 10μV

Se;ectivity: 20 dB

General

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

Power Consumption (at rated output, both channels operating): 560 W

Dimensions (W x H x D): 466 x 146 x 380 mm

Weight: 13 kg

Thanks for everything

Happy New Year to all my friends, and all visitors of this blog.