Yamaha GQ1031 Professional 31 Band Graphic Equalizer - Black Powder Coat

Yamaha GQ1031

Estate Sale Find, works as it should, sold as is, as pictured.

1U High Rack Mount

Here is a good no nonsense affordable EQ - single channel, 31 bands, 1U high. Yamaha live sound stuff really punches above its weight.

The Yamaha GQ1031 uses all solid state inductorless circuitry to offer up to ±12dB of cut or boost in 31 bands which cover the entire audio spectrum in third octave steps. Because severe boosting of some frequencies may cause the system to run out of headroom, an input level control and a peak reading LED (which lights up 3dB before clipping) are fitted so that potential problems can be recognized and corrected during the setting up procedure.

Successor to the Q1027, the Yamaha GQ1031 is a 31-band (20Hz to 20KHz) graphic equalizer that fits in a 1U rack. It can be used as a mono equalizer or as a single channel one when paired with another similar unit. For convenience, Yamaha also sold two of them in a single box with a couple more features as the Yamaha Q2031. An upgraded version, the GQ1031B, was released in 1987, followed by the GQ1031BII in 1988.

With a retail price of 200£, it joins a long list of yamaha affordable yet high quality products for home musicians. The sliders are fairly short but the circuitry is very quiet and everything works smoothly as expected.

Features

• 31 bands of equalization with 12dB of boost or cut on each band.
• Input level control adjusts input sensitivity, permitting optimum level matching with a wide range of sources, or can be used to match the level of equalized sound with that of bypassed (unequalized) sound.
• EQ switch in addition to main power switch determines whether equalizer circuity is on or bypassed; LED indicator lights when EQ circuitry is on.
• LED peak indicator lights when output level reaches or exceeds 3dB below the 20dB clip level.
• Input and output connections are via either standard 1/4" phone jacks or XLR balanced connectors.

Connection terminals and interfaces
INPUT/OUTPUT (jack)
INPUT/OUTPUT (RCA)