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

Aiwa AD-R470

 Nearly imperceptible quick reverse recording and playback is featured in AIWA's advanced AD-R470 cassette deck, which is certain to impress budget-minded audio enthusiasts everywhere. Amazingly quick 0,3 second auto reverse during both recording and playback is assured by AIWA's accurate radial-pivot mechanism, which turns the tape head 180 degrees in the blink of an eye.
Feather-touch full logic IC controls respond to a light touch, with Cue & Review for speedy location of desired pasages.
Sound quality features include Dolby HX Professional circuitry, which improves high frequency response regardless of the tape type, and an amorphous tape head for superb sound linearity. (The C, H, and U versions feature AIWA's super hard DX head for a corresponding level of performance.) Plus, Dolby B and C noise reduction reduce tape hiss for clear recordings that capture the dynamic  performance of today's digital and high-level analog sound sources. And, the fine bias control allows +/-20% adjustment to obtain the best response from Normal and CrO2 tapes.
 Dolby HX Professional
Not a form of noise reduction, Dolby HX professional is an advanced method for varying bias according to the characteristics of audio signals for an audible improvement in high frequency response. HX stands for "headroom extension'" and it operates during recording to dynamically adjust bias levels in response to the unput signals. This contributes to significant improvements in dynamic  range, while at the same time making possible "flatter" response in the upper frequencies. Under ordinary conditions, normal-position tapes recorded with Dolby HX professional actually outperform CrO2 tapes recorded without it in terms of high frequency response. You'll be amazed at the sound clarity and absence of distortion. Better yet, since Dolby HX professional is applied during recording only, the benefits can be heard when playing back these tapes on any playback equipment.

Plus Features:
Bi-directional auto rewind playback
Auto rec-mute
Auto tape selector: Metal/CrO₂/Normal
Rec/Play timer standby
Tape counter with reset
Headphone jack

Track:  4-track, 2-channel
Tape Speed:  1 lps (4,8 cm/sec)
Frequency Response
Normal Tape, at -20 VU:  20 - 16,000 Hz, 30 - 13,000 Hz (±3 dB)
CrO₂ Tape, at -20 VU:  20 - 17,000 Hz, 30 - 14,000 Hz (±3 dB)
Metal Tape, at -20 VU:  20 - 18,000 Hz, 30 - 15,000 Hz (±3 dB)
S/N Ratio:  65 dB (Dolby B, Metal); 78 dB (Dolby C, Metal, above 5 kHz)
Wow and Flutter (WRMS):  0,065%
Forward and Rewind Time for C-60 Tape:  90 sec.
Head:  REC/PB: Amorphous Alloy Head (H, U and C types; DX Head)
Erase Head:  Double-gap Ferrite Head
Motors:  DC servo motor x 1
Input Sensitivity Impedance  Line-In:  50 mV/50 kΩ
Output Level Impedance
Line Out:  0,36 V/50 kΩ
Headphone:  0,14 mW/8Ω
 Power Source:  AC  110-120/220-240 V, 50/60 Hz
Dimensions (W x H x D):  430 x 127,5 x 233,5 mm
Weight:  3,3 kg

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