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





McIntosh MT-5 turntable


McIntosh MT-5 precision turntable
MT-5 is a complete turntable package that is more than the sum of its parts. Engineered to exacting McIntosh standards, each piece contributes to its superb performance.
Advanced Technology Turntable
The MT-5 combines the latest technology in Phono Cartridges, Tone Arms, Mechanical Suspensions andRecord Platter Rotation for superb performance andaccurate operation.
Tone Arm
The MT-5 Tone Arm is made from Dural-Aluminumwith special damping material. The Tone Arm isboth light in weight and highly rigid. The noise freeVertical Bearings are made from two high precisionceramic surfaces. The Tone Arms lateral movement isperformed by a high precision Horizontal Bearing. Italso incorporates adjustable magnetic Anti-Skating.

Turntable Platters
The full size Outer Platter is made from a special silicone acrylic material weights five pounds, one and one-half inch thick. This helps to resist external vibrations from reaching the record during playback and its large mass provides the perfect flywheel action for stable playback speed. The inner platter is precision machined Anodized Aluminum weights one and one-half pounds and is six and one quarter inches in diameter.
Precision Motor and Drive Electronics
The Swiss made DC Motor has stainless steel brushes and is controlled by a highly refined servo control system assuring very accurate speed rotation.
Three Playback Speeds with fine Adjustments
The three playback speeds include 33 rpm, 45 rpm and 78 rpm. There is a separate trim adjustment allowing for accurate music reproduction for each of the three speeds.

Magnetic Air Dampened Bearing
The MT-5 Turntable Platter rotates on a ceramic bearing using magnetic suspension together with a cushion of air to provide vibration free rotation.
Multi-Layered Dampened Chassis
The MT-5 Turntable Chassis has a Stainless Steel base, with a thick Aluminum base plate and Acrylic top plate. The internal dampening material also helps to assure the only sound heard is from the record groove itself.
Power Control
The Power Control Input connection provides convenient Turn-On/Off of the MT-5 Illumination when connected to a McIntosh System with Power Control.
Fiber Optic Solid State Illumination
The even Illumination of the Front Panel and the Turntable Platter is accomplished by the combination of custom designed Fiber Optic Light Diffusers and extra long life Light Emitting Diodes (LEDs).
Glass Front Panel and Super Mirror Chassis  Finish
The famous McIntosh Illuminated Glass Front Panel and the Stainless Steel Chassis with Super Mirror Finish ensures the pristine beauty of the MT-5 will be retained for many years.

Features: 
MT-5 is factory adjusted for perfect playback. Tracking force, anti-skate force, cartridge overhang and arm height are all preset for maximum performance.
While the construction of the MT5 is meticulous, the setup is simple. In a few easy steps, you’ll be ready to enjoy your favorite vinyl recordings.
While maintaining complementary McIntosh styling, the MT-5 takes full advantage of the chassis materials used to suppress noise, resonance and coloration so the only sound produced is that which is on your records.
Includes a clear, form-fitting dust cover to protect moving parts and your records.

Specifications:
Drive Type:  Belt Drive
Drive Unit:  Decoupled DC motor with low noise bearings
Bearing:  Magnetic suspended ceramic
Playback Speeds:  33-1/3, 45 and 78 RPM
Speed Control:  Servo System
Motor Type:  DC Motor with Stainless Steel Brushes
Tonearm:  Friction free with magnetic bearing technology, 9” (228.6mm)
Arm Tube:  Dural-Aluminum
Counterweight:  Eccentric
Platter:  CNC machined, self-dampened, Silicone Acrylic, softly backlit in McIntosh green, 5 lbs (2.3kg)
Platter Bearing:  Magnetic Suspended Ceramic
Speed Stability:  ± 0.04%
Overall Dimensions (W x H x D):  445 x 178 x 190 mm (17-1/2x 7” x 7-1/2”)
[with dust cover 483 mm ( 19”)]
Weight:  14,3 kg (31.5 lbs ) net

CARTRIDGE SPECIFICATIONS
Cardridge Type:  Moving Coil, High Output
Output Level:  2.5 mV at 5 cm/s
Load Iimpedance:  1000 Ω recommended (Preamp MC Input)
Frequency Response:  20 Hz to 50kHz
Channel Separation:  35 dB at 1kHz
Compliance:15 x 10-6 cm/dyne
Recommended Tracking Force:  2.0 g
Channel Difference:  Less than 0.5 dB at 1 kHz
Total Mass:  6.3 g
Stylus:  Elliptical Diamond
Cantilever Material:  Aluminum


Pioneer A-40 amplifier


Non -Switching Stereo Amplifier
Continuous average power output of 70 watts per channel, min. at 8 ohms, from 20 Hz to 20 kHz with no more than 0,009% Total Harmonic Distortion
Non-Switching Power Amplifier
Eliminates switching distortion and drastically reduces all other types of distortion while reatining high efficiency.
Low-noise phono equalizer
Features an FET input to assure wider dynamic range and lower distotion from any record.
LED indicators
Include 7-segment power indicator for each channel and indicators for each input
Other features include:  Tape dubbing, A/B speaker drive, Loudnes contour control.

Specifications:
Continuous Power Output:
Continuous average power output of 70 watts per channel, 
(min. at 8 Ω, from 20 Hz to 20 kHz with no more than 0,009% T.H.D.)
Total Harmonic Distortion (20-20,000 Hz, 8 Ω):  0,009% (continuous rated power output)
Intermodulation Distortion (50 Hz :7,000 Hz =4;1; 8 Ω, from Aux):
Damping Factor (20 - 20,000 Hz, 8 Ω):  50
Input Sensitivity/Impedance:
Phono MM :  2,5 mV/50 k Ω
Tuner, Aux, Tape :  150 mV/50 k Ω
Phono Overload Level (1 kHz):  150 mV
Output level/Impedance:
Tape REC :  150 mV
Speaker :  A, B, A+B, OFF
Headphones :  Low Impedance
Frequency Response:
Phono (RIAA Equalization) :  20 - 20,000 Hz ±0,2 dB
Tuner, Aux, Tape Play :  10 - 70,000 Hz 0 dB -3 dB
Tone Controls
Bass :  ±10 dB at 100 Hz
Treble :  ±10 dB at 10 kHz
Loudness Contour (volume at -40 dB position):  +6 dB (100 Hz ), +3 dB (10 kHz)
Hum and Noise (IHF, A-network)
Phono Music :  86 dB
Tuner, Aux, Tape Play :  102 dB
Power Requirement:  120 V 60 Hz
Power Consumption:  190 W
Dimensions (W x H x D):  420 x 98 x 287 mm (16-9/16" x 3-7/8 " x 11-5/16")
Weight (net):  6,5 kg (14 lbs 5 oz)


Toshiba SA-7150


The Toshiba 7150 locks into the center of any station's assigned broadcast frequency and eliminates drift.

A few yearas ago, Toshiba introduced and marketed the first fully electronic digital-synthesized tuner. Now Toshiba has another first. We've built a digital-synthesized tuner into a high-powered, low-distortion FM/AM receiver; the Toshiba 7150 with Synthetune™
Synthetune is a function that provides tuning so accurate even a center tuning meter is unnecessary.
Drift is eliminated.
The 7150's FM tuner section also contains flat group delay IF circuitry. And a quartz crystal oscillator, which automatically locks into the center of any station's assigned broadcast frequency - as precisely as the station's own transmitter.

Tune the 7150 just by pushing the auto-scan button. It scans the full range of the  AM or FM band, stopping precisely at each listenable station. Bright green LED numerals instantly display all frequencies as they are tuned. Of course, there's more to the 7150 than Synthetune. It also has separate transformers for class A and class B amplifier sections. The toroidal transformer for class B amplification has separate left and right power supplies.
It also has Dolby FM and an air check switch for accurate tape recording. Furthermore the 7150 delivers a minimum of 150 watts per channel into 8 ohms, 20 Hz to 20,000 Hz , with no more than 0,05% Total Harmonic Distortion. And the restof the specs are just as impressive.

Specifications
Continuous Power Output:  150 W/channel (min. RMS at 8 Ω, 20-20,000 Hz , no more than 0,05% T.H.D.)
PoweR Output:
At 4 Ω :  2 x 230 W (20 - 20,000 Hz both channel driven
At 8 Ω :  2 x 160 W (1 kHz both channel driven)
At 4 Ω :  2 x 250 W ( 1 kHz both channel driven)
Total Harmonic Distortion ( at 8 Ω)
At Rated Power Output :  0,05%
At 1 W :  0,03%
Intermodulation Distortion:  0,05%
Damping Factor:  50
Input Sensitivity/Impedance:
Phono 1 :  2,5 nV/47 k Ω
Phono 2 :  2,5 mV/ 47 k Ω (100p/250p/450pF)
Tuner, Tape, Aux:  150 mV/47 k Ω
Phono Overload level:  350 mV RMS at 1 kHz
Output level
Tape REC :  150 mV
DIN :  30 mV
Pre Out :  1000 mV
Frequency Response:
Phono (RIAA Equalization) :  30 Hz to 15 kHz; ±0,2 dB
Aux, Tape :  10 Hz to 50 kHz; +0,5 -1 dB
Tone Control
Bass :  ±10 dB at 100 Hz
Treble :  ±10 dB at 10 kHz
Turnover Frequency:  200/400 Hz; 2,5 K/5 kHz
Loudness Contour:  +8 dB at 100 Hz +4 dB at 10 kHz
Signal-to-Noise Ratio(IHF short-circuited A network rated power)
Phono :  80 dB
Aux, Tape :  95 dB
Filter
Low :  20 Hz -6db/oct
High : 7 kHz -6 dB/oct
FM Tuner Section
Usable Sensitivity:  Mono 9,8 dBf 91,7 µV)
50 dB Quieting Sensitivity: 
Mono 14,7 dBf (3,0 µV)
Stereo 37,6 dBf (42 µV)
Signal-to-Noise Ratio:
Mono :  75 dB
Stereo :  70 dB
Distortion [Wide/Narrow]
At 100 Hz :  Mono 0,08/0,1%; Stereo 0,1/0,2%
At 1 kHz :  Mono 0,08/0,1%; Stereo 0,1/0,2%
At 6 kHz :  Mono 0,1/0,2%: Stereo 0,15/0,25%
Frequency Response:  20 Hz to 15 kHz ±0,5 dB
Alternate Channel Selectivity:
Wide :  50 dB
Narrow :  80 dB
Capture Ratio:  1,0 dB
Spurious Response Ratio:  100 dB
Image Rejection Ratio:  85 dB
IF Rejection Ratio:  100 dB
AM Suppression Ratio:  55 dB
Stereo Separation:  50 dB (1 kHz); 35 dB (30 Hz -15 kHz)
AM Tuner Section
Sensitivity:  350 µV/m (IHF, ferrite antenna)
Selectivity:  30 dB
Signal-to-Noise Ratio:  50 dB
Image Rejection Ratio:  40 dB
Miscellaneous
Power Requirements:  AC 120 V, 60 Hz - 220- 240 V 50/60 Hz
Power Consumption:  650 watts (UL) 6,8 A (CSA)
Dimensions (W x H x D):  550 x 200 x 500 mm
Weight:  27 kg


Luxman K-112 tape deck


The K-112 is a three-head, double Dolby configuration that allows monitoring of the "just-recorded" signal, while the recording is belong made. This  cassette deck is specially designed with a superb "single-direction" transport to ensure professional-grade recording.
This 3-head stereo cassette deck utilizes the latest in refined technological features. Some are as follows:  Hard Hexalam permalloy 3-head system; two motors; Dolby HX-Pro; Dolby B and C; feather touch full logic transport controls; four digit electronic  tape counter with memory; fine Bias control; Luxman System remote control capability, and more.

Hard hexalam permalloy 3-Head full monitoring configuration
The hard anti-wear surface, plus the laminated hexalam low eddy current core, give high unsaturated recording levels coupled with low loss, long life performance. In addition, the Hexalam designm coupled with OFC windings inn the R/P head, result in linear current flow and uniform magnetic flux inn the gap for purest sonic quality. Of course, 3 head allow full tape monitoring capabilities.
Two Motor Drive System
Separate capstan and reel drive motors ensure lowest possible wow and flutter, particularly over the long term. Variations in cassette friction or reel drive irregularities, have no effect on the precision of capstan rotation.
Dolby HX-PRO
This headroom extension system, developed for professional applications, greatly increases high frequency headroom for wide range dynamics without saturation. Operating in the record mode only, it automatically reduces bias in the presence of high level high frequency program material, while simultaneously, and automatically, adjusting the E.Q. dynamically to provide precise even frequency response. High frequency distortion is thereby greatly reduced and is especially effective when using normal (Fe) and high bias ( Co, CrO₂) tapes.
Fine Bias Control
Allows precise adjustment of tape bias for optimization of frequency response. Such adjustment permits one to compensate for variations in tape formulations when using different tape brands or for production variations within the same brands. It is especially useful with the 3 head system.
4-Digit Electronic Counter with Memory
While functioning in the same manner as a mechanical counter, this electronic counter offers more precision while completely eliminating the drive and wear problems of mechanical counters.
Low velocity Tape Head Engagement System
This motor driven cam engagement mechanis, smoothly pulls up the head assembly at low velocity to engage the tape cassette. This eliminates the hard jar and slap of solenoid systems, thus preventing the loosening or distortion of precision head alignments.
Feather Touch Full Logic Transport Controls
Transport control push-buttons, requiring only a light press, activate the computer controlled logic system for instant response of the transport to operator commands.
System Remote Control Capability
When used with Luxman's system remote control centers or receivers, such as the U-100, F-105, R-115, R-117, etc., the K-112 can be operated romotely, along with other Luxman components in the system, with one unified hand held remote controller.

Specifications:
System:  4-tracks, 2-channel stereo
Heads:  3 - Combination, Discrete Section Record/Playback head, plus one Erase head
Motors:
1 x FG Servo, Capstan Drive
1 x DC Motor, Reel Drive
Tape Speed:  4,8 cm/sec ±1%
FR/FF time :  90 sec. (C-60)
Wow and Flutter (WRMS):  0,05%
Frequency Response:
Metal Tape :  20 Hz - 21 kHz ( ±3 dB)
CrO₂ Tape :  20 Hz - 20 kHz (±3 dB)
Normal Tape :  20 Hz - 19 kHz (±3 dB)
Signal-to-Noise Ratio (3% Distortion, 400 Hz)
Metal Tape with Dolby C :  73 dB
Metal Tape with Dolby B :  65 dB
Metal Tape without Dolny NR :  56 dB
CrO₂ Tape with Dolby C :  72 dB
CrO₂ Tape with Dolby B :  64 dB
CrO₂ Tape without Dolny NR :  55 dB
Total Harmonic Distortion:  0,3% (3rd Harmonic ,CrO₂ position, 400 Hz, 0 dB)
Input Sensitivity/Impedance:
Line :  90 mV/ 47 k Ω
Output Level/Impedance:
Line :  500 mV/ 2,0 k Ω
Headphone :  100 mV (1,25 mW)/ 8 Ω
Noise Reduction System:  Dolby B, C, HX-PRO
Power Source:  100 - 120 V / 220 - 240 V 50/60 Hz
Power Consumption :  22 W (120 V/60 Hz USA models)
Dimensions (W x H x D):  438 x 110 x 319 mm (17-5/16" x 4-5/16" x 12-5/8")
Weight:  4,3 kg (9,5 lbs)