Pioneer SG-9800 Equalizer: Is the 12-Band Graphic EQ Worth It?

The Pioneer SG-9800 is a stereo graphic equalizer from 1979–1981 with twelve adjustable frequency bands per channel and a ±10 dB range. At Audio Everywhere its functions were tested; the unit shows few signs of use. A solid tonal tool for listeners who want to shape their frequency response.

What are the key specs of the Pioneer SG-9800?

Source: hifi-wiki.de / inspected by Audio Everywhere

How does the SG-9800 fit in?

Pioneer built the SG-9800 during the transition from the late seventies into the early eighties, a period when graphic equalizers were a fixed part of ambitious hi-fi systems. With twelve frequency bands per channel from 16 Hz to 32 kHz and a ±10 dB range, it offered far finer control than the simpler tone controls of many integrated amplifiers of the day. The stated frequency response runs from 5 Hz to 100 kHz, the signal-to-noise ratio is 92 dB and THD a low 0.006 percent – figures showing the unit was designed as a tonally neutral tool, not an effects box. It is integrated in the classic way via the tape-monitor loop or as a separate loop with two RCA inputs and outputs. At 420 × 150 × 355 mm and 7.1 kg, the silver component matches the larger Pioneer receivers and amplifiers of this era both visually and in size. The original retail price was around DM 998. You can find further models under used Pioneer gear.

Typical weak points

With graphic equalizers of this design and age, it is mainly the numerous slide potentiometers that oxidise over the decades and can crackle or hiss when moved – simply because many mechanical contacts are involved. The RCA jacks and switches also age and can show contact issues. Electrolytic capacitors in the power supply and signal path dry out over the years. These are general, age-typical notes about the device category and not a statement about this specific unit – on our unit the functions were tested and work flawlessly. Anyone buying such an EQ used should listen through the slide controls across their full travel.

Who is this unit for?

The SG-9800 is worthwhile for listeners who want to tailor their system to room, speakers or recording and who want more control than bass and treble knobs provide. Twelve bands per channel offer serious depth of adjustment. Anyone who listens purist-style without tonal intervention does not need it. Visually and systemically it is the ideal complement to a silver Pioneer system. Browse further used hi-fi gear as well.

Sources

• hifi-wiki.de – Pioneer SG-9800