Features
Low-Cut filter : 80 Hz (24dB/oct) – modifiable
Low frequency band : 30 Hz to 450 Hz – Shelf mode
Low Mid frequency band : 0.2kHz to 2 kHz + FREQ/3 Switch (60Hz to 600Hz)– full Q Adjust (Maximum Gain Changes with Q Settings)
High Mid frequency band : 0.6kHz to 6kHz + FREQx3 Switch (1.8kHz to 18kHz) – full Q Adjust (Maximum Gain Changes with Q Settings)
High frequency band : 1.4kHz to 16kHz – Shelf mode
High-Cut filter : 8 kHz (24dB/oct) – modifiable
Maximum 21 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
Final Product may vary a little from the pictures
Here are some listening samples
Soundcloud SLQ51X Comparison Test
Build Guide
GDIY Help Thread
GDIY Help Thread