JVC VN-900 amplifier
Features:
220 Watts power output
Power Bandwidth 20 Hz to 20,000 Hz
Phono input load switch
S.E.A. control system
S.E.A. record switch for tape recording
Dual facilities for tape monitoring and tape dubbing
All-stage direct-coupled OCL circuitry
Automatic transistor protector circuitry
Terminals for 4-channel connection
Pink noise generator built-in
Sound Effect Amplifier (S.E.A,)
The Sound Effect AMplifier is a feature unique to JVC which gives you more control over tone than has ever before been possible. it was never found outside professional recording studios before JVC incorporated it in their amplifiers and receivers. The advantages of the S.E.A. system are:
It gives the listener complete control of the tone throughout the entire frequency range.
By adjusting the controls entirely new sounds can be created
Tone can be adjusted to compensate for variations in the transmission system; recording method , type of music, characteristics of your stereo system and the acoustic properties of your room.
Unlike other tone control systems which have only a bass and treble control, the S.E.A. has seven controls. Each of these controls makes it possible to vary the response in a different frequency range. S.E.A. gives a steeper gradient at both the high and low frequency end of the response curve than the conventional system which is limited to 6 dB/oct. The outstanding feature is S.E.A.'s handling of the midrange frequencies. the conventional tone control system controls only the high and low ranges whereas S.E.A. extends this control to cover the whole frequency range.
Specifications
Type: Solid State Stereo Integrated Amplifier
Semiconductors: 39 Transistors; 14 Diodes;
Inputs: Phono 1 & 2;Aux 1, 2 & 3; Tape-Play 1 & 2; Main IN; 4-Channel Rear In
Outputs: Tape Rec 1 & 2; 2 x Pre-Out; 4-channel Rear Out; Speakers System 1 & 2; Headphones
DIN Socket: Tape 1, Tape 2
Rear Panel Controls: Phono 1 Cartridge Load select & Level adjust
Power Amplifier Section
IHF Dynamic Power:
170 W (85 + 85 W) at 8 Ω load
220 W (110 + 110 W) at 4 Ω load
Continuous Power RMS
120 W (60 W + 60 W) at 8 Ω load one channel driven
160 W (80 W + 80 W) at 4 Ω load one channel driven
100 W (50 W + 50 W) at 8 Ω load both channel driven
120 W (60 W + 60 W) at 4 Ω load both channel driven
Power Bandwidth
10 Hz - 23 kHz (8 Ω load one channel driven, output power 50 W THD 0,25%)
20 Hz - 20 kHz (8 Ω load both channel driven, output power 50 W THD 0,25%)
Total Harmonic Distortion: 0,05% at rated power (1 kHz)
Intermodulation Distortion: 0,4% at rated power
Frequency Response: 3 Hz - 450 kHz (-3 dB) at 1 W
Damping Factor: 50 Hz at 8 ohm load
Matching Load Impedance: 4 - 16 Ω
Input Sensitivity for Rated Power: 1 V
Preamplifier Section
Frequency Response: 20 Hz - 50 kHz ±0,5 dB
S.E.A. Controls
Center Frequency : 40; 150; 400; 1,000; 2,400; 6,000; 15,000 Hz
Control Range: ±12 dB
Input Sensitivity For Rated Power:
Phono : 2,5 mV
Aux : 200 mV
Tape Playback : 200 mV
Signal-to-Noise-Ratio:
Phono : 56 dB
Aux : 86 dB
Equalizer: RIAA (Mag) ±0,5 dB
Phono Overload: 700 mV (p-p) at 1 kHz; 250 mV RMS
Recording Out Level
PIN Jack : 180 mV
DIN Jack : 20 mV
Filters
Subsonic : 18 Hz 12 dB/oct
High : 9 kHz -12 dB/oct
Muting: -20 dB
Loudness: at -30 dB point; 1 kHz (+15 dB); 10 kHz (+4 dB);50 Hz (+11 dB)
Pink Noise Generator: 0° , 180°
Power requirement: 110, 120, 220, 240 V 50/60 Hz
Power Consumption: 230 W
Dimensions (W x H x D): 16-5/8" x 5-3/8" x 12-1/2"
Weight: 28 lbs