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





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)


Luxman K-111 tape deck

 The K-111 is a 2-head version of the K-112 for excellent recording at a more affordable price. A high-quaity, full logic transport and twin motor drive system maintains Luxman's reputation for sonic accuracy and durability.
This 2-head stereo cassette deck utilizes the latest inn refined technological features. Some are as follows:  hexalam RIP head; two motors; Dolby HX-Pro; Dolby B and C; feather touch full logic transport controls; three digit mechanical tape counter; Luxman System remote control capability, and more.
Specifications:
System:  4-tracks, 2-channels, 2-Motor
Heads:
Record/Playback :  hexalam head
Erase :  double Gap Ferrite
Motors:
1 x FG Servo, Capstan Drive
1 x DC Motor, Reel Drive
Tape Speed:  4,76 cm/sec
FR/FF time :  80 sec. (C-60)
Wow and Flutter (WRMS):  0,06%
Signal-to-Noise Ratio (3% Distortion, 400 Hz)
Metal Tape with Dolby C :  72 dB
Metal Tape with Dolby B :  64 dB
Metal Tape without Dolny NR :  55 dB
Frequency Response:
Metal Tape :  20 Hz - 19 kHz ( 30 Hz - 17 kHz ±3 dB)
CrO₂ Tape :  20 Hz - 17 kHz ( 30 Hz - 16 kHz ±3 dB)
Normal Tape :  20 Hz - 16 kHz ( 30 Hz - 15 kHz ±3 dB)
3rd Harmonic Distortion: 1% (Normal Tape, 400 Hz, 0 dB = 160 nWb/m)
Input Sensitivity/Impedance:
Line :  100 mV/ 50 k Ω
Mic :  0,6 mV/ 1,8 k Ω
Output Level/Impedance:
Line :  500 mV/ 2,4 k Ω
Headphone :  1 mW/ 8 Ω
Noise Reduction System:  Dolby B, C, HX-PRO
Power Source:  100 - 120 V / 220 - 240 V 50/60 Hz
Power Consumption :  18 W (120 V/60 Hz Canadian models)
Dimensions (W x H x D):  438 x 110 x 267 mm (17-1/4" x 4-5/16" 10-1/2")
Weight:  3,9 kg (7,7 lbs)


Luxman D-103u CD Player


High-Quality Vacuum Tube Analog Output Stage
The D-103u was designed to make the unique design of the D-105u available to more conservative budgets - without compromising on sound quality. That means using the same basic components in the analog signal path: two triode vacuum tubes in the output stage to recreate the delicate, transparent tones of the original performance.
Advanced Digital Output Stage
The D-103u also offers 18-bit , 8-times oversampling digital filters, and independent dual D/A converters. The STAR Circuit helps preserve signal purity at all stages.
"Mid-Ship" Mechanism
The ideally balanced, central position of the disc tray combines with Luxman's High-Rigid Lock mechanism to enhance the anti-resonance of the D-103u
Features Emphasize Ease of Use
Convenient D-103u features include: remote volume control, switchable front panel display dimmer, vacuum-tube warm-up switch, and 32-track random access and track programming.  In sum, the D-103u offers everything that a music lover could ask for  - and more.
Direct link to the LV-103u
The D-103u is the mainn playback source in serial remote control with the Luxman LV-103u Ultimate Fidelity integrated amplifier.other D-103u features include:
Memory Auto Check;  Automatic Scan/Pause; Fade-In/Out; Emphasis Display; CD Single Compatibility

Specifications:
Frequency Response:  5 Hz - 20 kHz (±1,0 dB)
Total Harmonic Distortion:  0,05% (at 1 kHz)
Signal-to-Noise Ratio:  105 dB
Dynamic Range:  89 dB
Channel Separation:  89 dB
Analog Output
Fixed :  2,0 V/ 47 k Ω
Variable :  0 -  2,0 V / 47 k Ω
Digital Outputs:
Coaxial :  0,5Vp-p / 75 Ω
Optical :  -21 to -15 dBm / 660 nm Wavelength
Dimensions (W x H x D):  438 x 145 x 320 mm
Weight:  6,5 kg