| Title | Value |
|---|---|
| MAIN section | MAIN section |
| Dynamic output : | 260W |
| Output : | 2x 80W (4 Ohm ; 1Khz ; 0,1% THD) |
| 2x 68W (8 Ohm ; 1Khz ; 0,1% THD) | |
| 2x 70W (4 Ohm ; 20Hz...20Khz) | |
| 2x 65W (8 Ohm ; 20Hz...20Khz) | |
| THD : | 0,1% (rated power) |
| 0,08% (1W output) | |
| TIM : | 0,1% (rated power) |
| 0,08% (1W output) | |
| Damping factor : | 50 (8 Ohm) |
| Power bandwidth : | 2Hz...80Khz (± 1dB) |
| Square-wave tilt : | < 5% at 50Hz |
| S/N ratio : | 110dB |
| Input : | 1,5V / 100,000 Ohm |
| Output load : | 4...16 Ohm |
| PRE section | PRE section |
| Inputs : | 2,5mV / 50kOhm (phono 1 & 2) |
| 150mV / 50kOhm (tuner, aux & tape) | |
| THD : | 0,05% (rated power) |
| TIM : | 0,08% (rated power) |
| Frequency response : | 30Hz...15Khz (± 0,2dB ; phono 1 & 2) |
| 15Hz...40Khz (+0 / -1dB ; lines) | |
| Maximum input : | 230mV (1Khz ; 0,1% THD ; phono1 & 2) |
| S/N ratio : | 80dB (IHF-A ; phono 1 & 2) |
| 90dB (IHF-A ; lines) | |
| Tape output : | 1,5V / 2700 Ohm |
| Bass control : | ± 10dB @ 100Hz |
| Treble control : | ± 10dB @ 10Khz |
| Bass turnover : | 400Hz or 125Hz |
| Treble turnover : | 8Khz or 2Khz |
| Subsonic filter : | 10Hz |
| High filter : | 5Khz |
| Loudness switch : | +5dB at 100Hz and 10Khz |
| Muting switch : | -20dB |
| General | General |
| Componentry : | 46 transistors |
| 16 diodes | |
| 4 ICs | |
| Dimensions : | 44,4 x 15,9 x 38cm |
| Weight : | 14kg. |
Onkyo A-7
october 1976
c.1978
Healthy and powerful 1970s.
The A-7 is powered by a 4,8kg power transformer and 2x 25,000µF caps.
The driver stages are a p-p Class A design while output is Class B.
Low-resistance copper grounding tracks to limit the influence of dynamic transmodulation, keep internal impedance low and stereo separation high.
The phono section is a low-noise differential input with Class A p-p, allowing linearity and high input level - 230mV at 1Khz.
And all the usual functions : bass & treble controls with two turnover frequencies each, subsonic & high filters, tape dubbing both ways, stepped attenuator and tone controls etc.
No DC circuit, though, and no deported input/speaker selectors - lots of wiring.
So the A-7 is simple, healthy, powerful and will last forever.
Designed to be housed in a bigga wood enclosure (therefore much better looking) but said enclosure is... Invisibilia ; It seems the bigger A-10 was export-only.
page online since : august 2010
page updated : august 2010
page type : LGT / KNB
page weight : 178.27 Kb / 0 b
page updated : august 2010
page type : LGT / KNB
page weight : 178.27 Kb / 0 b
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