Pioneer SG-70
¥ 55,000 (around 1980)
Commentary
This is a graphic equalizer that can control a wide range of 12-division L/R independently.
The wide band of 16 Hz to 32 kHz is divided into 12 parts, and each part can be adjusted independently on right and left with gain ± 10 dB.
A high-slew rate IC is used in the band-pass circuit for the equalizer to obtain excellent characteristics.
In addition, the newly developed bandpass filter and newly developed low-distortion IC reduce the distortion and noise generated when the signal passes through each filter.
It is equipped with a muting circuit using relay to prevent pop sound at power ON / OFF.
LED is used for all 24 slide knobs.
This indicator lights up when the equalizer function is active. You can see the characteristic curve when the equalizer function is active.
An over-low indicator is mounted to monitor the input and output levels of the left and right channels. The indicator lights when an over-input or over-signal after control is detected.
Equipped with -3dB and -6dB attenuators.
Model Rating
| Type | Graphic equalizer |
| Variable range | ± 10 dB (L/R independent) |
| Center Frequency (12 Divisions) | 16, 32, 64, 125, 250, 500 1k, 2k, 4k, 8k, 16k, 32 kHz |
| Maximum power output | 7.5 V (1 kHz, 0.02% distortion rate, 47k Ω) |
| Signal-to-noise ratio | 110 db (7.5 v, IFF-A, short circuit) |
| Input impedance | 50k Ω |
| Output impedance | 600 Ω |
| Frequency characteristic | 5 Hz ~ 100 kHz + 0 -3dB |
| External dimensions | Width 420x Height 150x Depth 355 mm |
| Weight | 7.1kg |