Onkyo A-7050

Onkyo Integra A-550

1 9 7 0 1970
1 9 7 2 1972

The A-7050 : It Only Sounds Expensive

Earlier sibling to the A-7055, the A-7050 (Integra A-550 in Japan) is an inexpensive but carefully designed amp which not only allows 2x 15W of OCL power with the help of IC-based power stages but also, mainly, allows you to enjoy 4-channel surround sound with its Matrix 4CH mode : just plug a second pair of loudspeakers, set to Matrix 4CH and "let the realism of surround sound engulf you" !

For the more technically inclined, however, here are a few technical features :
0,05% THD !
NFB tone controls
1-direction tape dubbing
MIC input with mixing knob
Loudness, high and low filter switches
Muting button.

And, finally, visual appeal : the A-7050 is "an amplifier you will be proud to own even when it is off".
Come to think of it, the latter feature is a very rare thing these days.

Onkyo A-7050, image 1 Onkyo A-7050, image 2 Onkyo A-7050, image 3
Onkyo A-7050 specifications
Title Value
MAIN section MAIN section
Power output : 80W (IHF, dynamic, 4 Ohm)
60W (IHF, dynamic, 8 Ohm)
2x 30W (4 Ohm, each channel driven at 1Khz)
2x 24W (8 Ohm, each channel driven at 1Khz)
2x 25W (4 Ohm, both channels driven at 1Khz)
2x 20W (8 Ohm, both channels driven at 1Khz)
2x 15W (8 Ohm, both channels driven at 20Hz...20Khz)
THD : 0,5% at rated output
0,05% at 10W output
IMD : 0,1% at rated output
Power bandwidth : 10Hz...20Khz (IHF -3dB, 0,5% THD)
Frequency response : 10Hz...30Khz (±1dB)
S/N ratio : 100dB (IHF-A)
Damping factor : 40 at 8 Ohm
Load impedance : 4...16 Ohm
PRE section PRE section
Inputs : 2,5mV / 50kOhm (phono)
10mV / 50kOhm (mic)
200mV / 50kOhm (lines)
RIAA deviation : ±1dB (30Hz...15Khz)
Phono overload : 100mV (RMS at 1Khz)
380mV (RMS at 10Khz)
Output voltage : 200mV / 10kOhm (rec out RCA)
30mV / 100kOhm (rec out DIN)
Bass control : ± 10dB at 100Hz
Treble control : ± 10dB at 10Khz
Low filter : 6dB/octave below 40Hz
Loudness : +9dB at 70Hz
+5dB at 10Khz
Semiconductors : 11 transistors
13 diodes
2 ICs
Dimensions : 39,8 x 12,9 x 303cm
Weight : 8kg.
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