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

Rek-O-Kut Imperial II

 The Imperial II records directly onto disc from a variety of program sources - AM and FM radio, tape, live performances and record to disc. The equipment is housed in 2 portable vinyl-covered cases. Rek-o-Kut's SPK-44 may be used with the Imperial II for general sound amplification or playback.

The Imperial II consists of:
Model TR-43H :  Three-speed recording turntable
Model R8B :  new 20 watt, low noise, transitorized recording amplifier.
Model M-12S :  Overhead lathe
Model RH-5 :  Newly designed wide range recording head.
Model S-120 :  High fidelity tonearm.
 Recording amplifier Model R8B offers the following advantages:
A compact and versatile combination of three separate transistorized preamplifiers and 20-watt power Amplifier.
Choice of mixing or separate use of three outputs from Microphone, Tape and Phono Preamplifiers, as desired.
Specially designed tone controls for exact compensation of recording equalization or playback.
Individually selected, low-noise transistors for low signal-to-noise ratio in recording and playback.

Specifications of Imperial II
Record Cutter and Playback Unit
Motor:  Hysteresis Synchronous motor fitted with lamitex drive pulley. Suspended in shock mounts to prevent transmission of motor vibration.
Recording Area:  Records from 6" up to 13¼"
Speeds:  Simple, finger-tip speed control.  Records at both 33 and 78 rpm. Includes idler and adapter for 45 rpm recordings
Overhead Recording Lathe:  Model M-12S Lathe.
Hand Crank for run-in and run-off spiral grooves.
Provision for Interchanging leadscrews for Standard and Microgroove.
Equipped with standard 120 line leadscrew, Liftomatic Safety Cam prevents double cutting stylus damage. Automatically raises cutter as center of disc is approached.
Calibrated Scale for Timing
Recording Head:  Model RH-5 response from 30 -13,000 Hz
Playback Arm:  Model S-120 for records up to 13¼" - with magnetic cartridge
Recording Amplifier Unit - R8B
Output:  20 watts
Response:  20 to 20,000 Hz ±2 dB (at full output)
Harmonic Distortion:  0,32% at 1,000 Hz (at full output)
Intermodulation Distortion:  0,8%
Hum Level (below rated output):
Tape :  60 dB
Mike :  64 dB
Phono :  61 dB
Inputs:  Microphone; Tape and Phono (mixing); Tuner (high level)
Preamplifier sections completely transistorized
Mike Preamplifier
Input Impedance:  10,000 Ω
Sensitivity:  3,25 mV
Power gain:  102 dB
Distortion: less than 1%
Noise:  -65 dB below rated output
Tape Preamplifier
Input Impedance:  High impedance head
Sensitivity:  2,17 mV
Power Gain:  104 dB
Distortion:  less than 1%
Frequency Response:  50 to 15,000 Hz ±2 dB, equalized for NARTB
Noise:  -55 dB (below rated output)
Phono Preamplifier
Input:  magnetic, high impedance
Sensitivity:  4,75 mV,  equalized for RIAA
Power Gain:  99 dB
Distortion:  less than 1%
Noise:  -59 dB (below rated output)
Tuner Input:  Accepts all std. AM and FM Tuners
Phono, Microphone and Tape Level;
Master Volume;
Bass Control (±22 dB at 50 Hz)
Treble Control (±20 dB at 15 kHz)
Playback-Recording switch;
Power switch.
Recording Level Indicator:  Damped volume unit type meter with special calibrated scale.
Speaker and Cutter (16, 8 and 4 ohms);
Monitor (for use with high impedance headphones);
Pre-amp (2,000 Ω).
Tubes:  2 - 6973; 1 - 6AN8
Transistors:  3 - 2N408; 5 - 2N 406
Rectifiers:  1N2071 Silicon
Powe Requirements:  115 watts;  117 V AC, 50/60 Hz
Leatherette covered carrying cases with storage lid and handle.
Dimensions (W x H x D)
R8B Amplifier :  20½ x 7 x 10 inches
Recorder :  20½ x 14 x 18 inches
R8B :  25 lbs
Recorder :  45 lbs

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