dbx 231s Dual Channel 31-Band Graphic Equalizer (1U Rack) — XLR/TRS I/O
Precision EQ shaping for live sound, monitors, installs, and studio
The dbx 231s is a pro-grade dual-channel 31-band (1/3-octave) graphic EQ built for clean, predictable control. It’s the kind of rack piece you toss into a FOH/monitor rig (or a permanent install) and trust to do the job every time—tight feedback control, tonal shaping, and system tuning without adding noise or harshness.
Condition:
Very good pre-owned condition. Fully functional.
Cosmetic: minor wear and small scratches consistent with normal rack use (see photos).
Included:
dbx 231s equalizer (1U rackmount)
IEC AC power cord only
(No box or additional accessories.)
Key Features & Specs:
Dual channel/stereo 31-band EQ (1/3-octave, ISO centers)
Constant-Q filter topology for precise, musical control
Switchable boost/cut range: ±6 dB or ±12 dB
Input gain control: ±12 dB per channel
50 Hz low-cut filter (12 dB/oct) per channel
Output level metering + clip indication
Balanced XLR + 1/4" TRS inputs & outputs
Frequency response: 10 Hz – 50 kHz
Dynamic range: 112 dB
THD+Noise: < 0.005%
Power: 100–240V worldwide compatible (IEC inlet)
Why buy this one?
Solid “workhorse” EQ that’s easy to dial in fast
Great for ringing out monitors, taming harsh rooms, or tightening a PA
Dual channel means you can run stereo, or treat mains + monitors separately
Clean, low-noise performance that plays nice in pro racks
FAQs:
1) Is it fully functional?
Yes — tested and working properly.
2) Does it come with the original box or manuals?
No — unit + AC power cord only.
3) What connections does it use?
Balanced XLR and 1/4" TRS inputs/outputs on both channels.
4) Is it stereo?
Yes. It’s a true dual-channel EQ (use it stereo or as two independent channels).
5) Can it help with feedback in live setups?
Yes — 31-band EQs are commonly used to tame feedback and tune monitors/rooms.
6) What rack size is it?
Standard 1U rackmount.
7) Does it support worldwide voltage?
Yes — 100–240V via IEC power inlet.
