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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





JVC KD-25 cassette tape deck

Stereo Cassette Deck

Features:

3-position Bias/Equalizer Switches

Low Wow and Flutter of 0,15% (DIN 45 500)

Automatic Input Selector

Gear/Oil- Damped Cassette Lid

Tape Illumination

 

The KD-25 is a near-duplicate of the KD-55, but is priced substantially less. But unlike other decks in the same price range the KD-25 features low wow and flutter. This JVC economy-priced deck with Dolby system is well worth the investment of a listen at your nearest dealer's showroom.

Easy to Use Facilities

Cassette mode buttons of the KD-25 are serrated and flat for easy, sure grip. Plus; The JVC 5-LED peak Indicator warns you of imminent saturation distortion; and VU meters are extra-large for high visibility.

Accurate Tape Transport

Tapes are unspotted by a precision-finished capstan (ground to a roundness of 0,1 µ), which is coupled to a large, dynamically balanced, 80 mm flywheel, driven by a precision ground belt.  It contributes to the low wow/flutter and high s/s of the KD-25.

 


Specifications

Type:  stereo cassette deck

Track System:  4-track, 2-channel

Frequency Response: 

SA/CrO₂ : 40 - 15,000 Hz (Typical)

Normal :  40 - 14,000 Hz (Typical)

Signal-to-Noise Ratio :  56 dB (from Peak Level, Weighted) without  Dolby

The Signal-to-Noise Ratio is improved by 5 dB at 1 kHz and by 10 dB above 5 kHz with Dolby on.

Wow and Flutter:  0,06% (WRMS); 0,15% (DIN 45 500)

Crosstalk:  65 dB at 1 kHz

Channel Separation:  35 dB at 1 kHz

Total Harmonic Distortion :  1,3% ( 1khz, 0 VU, Normal tape)

Heads: 

Recording/Playback :  SA (Sen-Alloy) head

Erase: Two-gap , Ferrite head

Bias:  AC bias (95 kHz)

Erasure:  AC erasure (95 kHz)

Motors:  Electronic DC motor

Tape Speed:  4,8 cm/sec

Fast Forward/Rewind Time:  80 sec with C-60 cassette

Bias and Erase System:  AC-95 kHz

Input Sensitivity/Impedance:

MIC :  0,2 mV/600 Ω  - 10 k Ω

Line :  80 mV/100 k Ω

DIN :  0,1 mV/ 10 k ohm

Output Level/Impedance

Line :  410 mV/3 k Ω

Headphone :  410 mV/3 k Ω 

DIN:  0,3 mW/8  Ω  - 1 k Ω

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

Power Consumption:  11 W

Dimensions (W x H x D):  420 x 149 x 264 mm (16-9/16" x 5-7/8" x 10-7/16")

Weight:  5,0 kg (11,0 lbs)


 

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