ONKYO Integra E-707
¥ 54,800 (released in 1983)
Commentary
The Integra series graphic equalizer.
Fine adjustment is possible with the level controller that divides 16 Hz to 32 kHz into 12 parts left and right.
Equipped with a 32 Hz to 16 kHz test tone oscillator corresponding to the intermediate frequency of each element.
When the Spot button is pressed, a 32-Hz test tone is emitted and the 32-Hz level control knob emits light. Each time the Spot button is pressed, an octave higher test tone is emitted in turn and the light emitted by the knob also moves.
When you press the sweep button, the oscillation of 32 Hz to 16 kHz and the light emission of the knob automatically move, so that you can check the overall characteristics after adjustment.
It is equipped with an operation mode display which displays the flow of the signal from the input to the output by light in conjunction with each selector button.
The newly developed super turbo system is used to prevent modulation noise from affecting sound quality by co-locating the power transformer and amplifier.
The two stage function of the delta turbo circuit and turbo filter suppresses modulation noise generated from the power supply and external noise entering from the AC power supply.
The maximum variation of each element can be switched in two steps of ± 12 dB and ± 6 dB.
When the level control is moved, the sharpness of peaks and dips is automatically corrected to create a smooth characteristic, thereby smoothing the connection with the adjacent characteristic.
It is equipped with a display switch that allows you to see only the characteristics of one channel. When you press the display switch, the level control knob of the channel you pressed disappears and you can see only the curve of the other channel.
The Output Selector enables after-monitoring of the signal recorded during equalization recording on a 3-head deck.
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Model Rating
| Type | 12-element graphic equalizer |
| Input sensitivity (FLAT) | 150mV |
| Input impedance | 50k Ω |
| Output Voltage (FLAT) | 150mV |
| Output impedance | 600 Ω |
| Max Input | 5 v (20 Hz ~ 20 kHz, THD 0.01%) |
| Center frequency | 16 Hz, 32 Hz, 64 Hz, 125 Hz, 250 Hz, 500 Hz 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz, 32 kHz |
| Frequency Response (FLAT) | 10 Hz to 35 kHz ± 0.5 dB |
| Total harmonic distortion factor | 0.01% or Less (20 Hz ~ 20 kHz, 1.5 V Output, FLAT) |
| Signal-to-noise ratio | 100 dB (1.5 V output, IHF-A input short) |
| Variable range | ± 12 dB / ± 6 dB |
| Gain | 0 dB ~ -20dB |
| Oscillator oscillation frequency | 32 Hz, 64 Hz, 125 Hz, 250 Hz, 500 Hz 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz (SPOT/SWEEP) |
| Oscillator frequency characteristic | 32 Hz to 16 kHz ± 0.8 dB |
| Oscillator distortion factor | 2% or less (32 Hz to 16 kHz) |
| Oscillator output | 15mV |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 17W |
| AC outlet | Unswitched:200W |
| External dimensions | Width 435x Height 89x Depth 365 mm |
| Weight | 4.5kg |