Low-Cut filter : 80 Hz (24dB/oct) – modifiable

Low frequency band : 30 Hz to 450 Hz – Bell or Shelf mode

Low Mid frequency band : 0.2kHz to 2 kHz – full Q Adjust

High Mid frequency band : 0.6kHz to 7kHz – full Q Adjust

High frequency band : 1.4kHz to 14kHz – Bell or Shelf mode

High-Cut filter : 8 kHz (24dB/oct) – modifiable


Maximum 18 dB of boost/cut gain per band (center detent)

High quality pots (TT Electronics and Alps Alpine)

THAT 1246 In- and THAT 1646 Outputstages


Its running on +16V/-16V in the 500 API Standard/ VPR Rack or in the GDIY 51X Rack


Build Guide
Build Guide


GDIY Help Thread
GDIY Help Thread

SLQ51X Black

PriceFrom €274.84
Excluding Sales Tax
  • This is a Program Equalizer in 500 API Format, it's based on a classic styled 4000 Black Equalizer. We added to this 4 Band Equalizer a Low and High Cut Filter to make it more flexible in Mixing or Recording situations.

    Improved Build - Easy Final Assembly, New Testpoints, BLACK is the New Version of the EQ

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