ONKYO Integra 725
¥ 45,900 (around 1969)
Commentary
A pre-main amplifier that uses all stages of direct-coupled circuits in the main amplifier section.
The preamp section, especially the equalizer section, has been thoroughly analyzed to improve the equalizer allowable input.
Model Rating
| Type | Pre-main amplifier |
| Power Amplifier Unit | |
| Circuit system | All-stage direct-coupled circuit |
| Rated Output (THD 0.1%, 1 kHz) | 22W + 22W (8 Ω) |
| Dynamic Power (IHF) | 70W (8 Ω) |
| Total harmonic distortion rate (1 kHz) | 0.1% or Less (at Rated Output) 0.05% or Less (at 10W Output) |
| Frequency characteristic | 15 Hz to 70 kHz, 0 -1dB |
| Power Band With (IHF) | 10 Hz to 100 kHz -3dB |
| Damping factor | 60 (DC ~ 30 kHz) |
| Signal-to-noise ratio (IHF A network) | 100 dB or more |
| Rated input voltage / impedance | 1V/100k Ω (10 Hz to 50 kHz) |
| Load impedance | 4 Ω ~ 16 Ω |
| Gain | 22dB |
| Preamplifier Section | |
| Distortion Factor (1 kHz, 1 V Output) | Not more than 0.05% |
| RIAA deviation (30 Hz to 15 kHz) | Within ± 0.5 dB |
| Equalizer allowable input | 200mV(1kHz) 930mV(10kHz) |
| Signal-to-noise ratio (IHF-A) | Phono1, 2 : 75 dB or more AUX, Tuner : 90 dB or more |
| Input Sensitivity / Impedance (1 kHz) | Phono1, 2 : 2.4mV/50k Ω, 100k Ω switching AUX : 100mV/100k Ω Tuner, Tape moni : 100mV/100k Ω |
| Tone control | Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz) |
| <General> | |
| External dimensions | Width 313x Height 136x Depth 366 mm |
| Weight | 8kg |
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