Aiwa AX-7800 receiver

DC Stereo receiver with Digital Quartz Synthesiser Tuning

Now Aiwa proudly introduces an exceptional high fidelity receiver designed to make tuning faster, easier and more accurate than ever; the revolutionary new AX-7800. with the same quartz locked digital-synthosized tuning system utilized on the most sophisticated and expensive FM tuners available today.

Now perfect tuning is as simple as pressing a button There's no more fumbling or fidgeting with tuning knobs, dials and center tuning meters. The new Aiwa AX-7800 simply doesn't have any.

Instead, it provides an instant digital readout that's perfectly tuned to the actual station frequency being received.

Drift is impossible. Because Aiwa's quartz crystal oscillator locks instantly and precisely into the center of each succeeding station's assigned frequency. Now when you tune the Aiwa AX-7800, you stay tuned. With unerring accuracy that even separates weaker stations from their stronger neighbors. Something no conventional receiver with AFC can do.

Aiwa's new AX-7800 is loaded with features; like memory Tuning that lets you preset up to 6 FM and 6 AM stations. Like a highly visible 9-point LED peak power bar graph. Like independent bass and treble frequency turnover controls.

And the AX-7800's DC-power amplifier gives you 60 Watts per channel RMS at 8 ohms from 20 Hz to 20 kHz, with no more than 0,05% T.H.D.

Right now, almost no receivers have all these advanced features.

Features:

Quartz PLL synthesizer tuning

Automatic tuning

Manual scan selection

Auto search hold tuning

Direct selector key

DC amplifier design means optimum sound quality at all frequencies

By the use of classic DC design in the power amplifier section, deterioration of low-frequency sound components due to phase shift is largely avoided, giving the AX-7800 superbly flat reproduction characteristics all the way down to DC (0Hz). Total Harmonic Distortion is kept to a completely inaudible 0,05% from 20 to 20,000 Hz at rated output, and the 3-stage differential amplifier circuit also assures superior signal-to-noise performance from tuner, turntable orother sources.

High performance equalizer amplifier.

Employing a newly developed plus-minus split power supply IC, the dual FET differential amplifier used for phono cartridge reproduction assures close adherence to the RIAA reference curve, as well as a high signal/noise ratio of 80 dB. The 200 mV maximum phono input provides dynamic margin with any type of high quality MM cartridge.

Specifications

FM Tuner Section

 usable Sensitivity:

Mono :  10,8 dBf (1,9 µV)

Stereo : 17,2 dBf (4 µV)

50 dB Quieting Sensitivity:

Mono :  17,2 dBf (4 µV)

Stereo :  36,0 dBf (35 µV)

Signal-to-Noise ratio:

Mono :  75 dB

Stereo :  70 dB

Capture Ratio:  1,5 dB

Alternate Channel Selectivity:  70 dB (±400 kHz)

Image Rejection:  75 dB

IF Rejection:  90 dB

Spurious Rejection:  100 dB

AM Suppression: 55 dB

Total Harmonic Distortion

Mono :  0,4% (at 1 kHz)

Stereo :  0,5 5 (at 1 kHz)

Frequency Response:  30 - 15,000 Hz (+0,5 -2 dB)

Stereo Separation:  4 dB at 1,000 Hz

Subcarrier Suppression :  57 dB

Antenna Terminals:  300 Ω (balanced), 75 Ω (unbalabced)

AM Tuner Section

Sensitivity (External antenna)

3 Band Type :  30 µV

2 band Type :  25 µV

Signal-to-Noise Ratio:  55 dB

Selectivity:  30 dB

Image Rejection:  50 dB (at 1,000 Hz)

IF Rejection:  35 dB (at 1,000 Hz)

Power Amplifier Section

Continuous power Output:  60 W x 2 (20 Hz - 20 kHz, T.H.D. 0,05%)

Total Harmonic Distortion:  0,05% (at effective power output 8 Ω)

IM Distortion:  0,05%

Damping Factor:  50 (8 Ω)

Residual Noise:  0,5 mV 98 Ω)

Preamplifier Section

Input Sensitivity/Impedance

Phono 1 :  2,5 mV / 47 k Ω

Aux 1 :  150 mV / 47 k Ω

Tape 1 :  150 mV / 47 k Ω

Phono Overload:  200 mV 91 kHz, THD0,1%)

Frequency Response:

Phono :  30 Hz - 15 kHz ±0,5 dB

Aux, tape :  10 Hz - 50 kHz  +1 -3 dB

Tone Control Range

Bass :  ±6 dB at 100 Hz (Turnover Frequency 200 Hz); ±9 dB at 100 Hz (Turnover Frequency 400 Hz)

Treble :  ± 9 dB at 10 kHz (Turnover Frequency 2,5 kHz); ±6 dB (Turnover Frequency 5 kHz)

Loudness Control:  9,5 dB (100 Hz); 12 dB (10khz)

Signal-to-Noise Ratio: 

Phono :  80 dB

Aux, Tape Input:  100 dB

Power Supply:  120, 220, 240 V; 50/60 Hz

Power Consumption:  160 W

Dimensions (W x H x D):  500 x 120 x 440 mm (19-11/16" x 4-3/4" x 17-3/8")

Weight:  10,5 kg (23,1 lbs)