Detail 01
Single channel, 31 bands
All the frequency resolution of the 231s for one signal path, in half the rack height.
Product detailSKU #1294516231295
dbx131s Single Channel 31-Band Graphic Equalizer
1/3
Independent shopping perspective
The Korena take
One channel of 31-band graphic EQ in a single rack space. For mono systems, a single monitor send, or one problem signal path.
Strong match
Who this is for
- Mono PA in a bar, gym, or house of worship
- One monitor send that needs precise feedback control
- Adding fine EQ to a rack with one space left
Consider the trade-offs
When to look elsewhere
- Stereo systems — you would need two of these
- Anyone running multiple monitor mixes from one rack
- Broad tone shaping only, where a 15-band costs less
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
1.75 inch H, 19 inch W
One rack space. Full third-octave control without giving up two slots in a small portable rack.
Detail 03
±6dB / ±12dB range switch
±6dB gives finer slider travel for careful tuning; ±12dB handles rooms that need aggressive correction.
Detail 04
50Hz 12dB/octave low cut
Switchable rumble filter, so you are not spending your bottom sliders cleaning up subsonic noise.
Detail 05
>+21dBu max input and output
Handles hot line-level sources without clipping the EQ before the signal reaches your amp.
Detail 06
Impedance-balanced, RF filtered I/O
Tolerates unbalanced gear and long cable runs near lighting rigs and wireless without picking up interference.
Final check
Know before you order
- 01One channel only — a stereo rig needs a second unit or the 231s
- 02Allow about 6 inches of depth behind the rack rails
- 03Inputs and outputs are XLR and 1/4 inch TRS; plan cabling accordingly
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can I use this for a stereo system?
Not on its own. It processes one channel. For stereo you would buy two, or the dual-channel 231s in two rack spaces.
02How does it compare to the 231s?
Same 31-band resolution and same feature set. The 131s is one channel in one rack space; the 231s is two channels in two.
03Where does it go in the signal chain?
Between your mixer output and your amplifier or powered speaker, or in a monitor send path before the amp.
04Can I bypass the EQ without unpatching?
Yes. The EQ bypass switch takes the graphic section out of the signal path, which is useful for comparing your curve to flat.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsSound
- Impedance
- Balanced 100 ohm, unbalanced 50 ohm
1 detailsBody & build
- Type
- Impedance-balanaced/unbalanced, RF filtered
5 detailsConnections & power
- Connectors
- 1/4 inch TRS, male XLR (pin 2 hot)
- Power Consumption
- 15W
- Max Input Level
- >+21dBu balanced or unbalanced
- Max Output Level
- >+21dBu balanced/unbalanced into 2k ohm or greater
- Operating Voltage
- 100VAC-240VAC 50/60Hz
3 detailsSize & weight
- Bandwidth
- 20Hz to 20kHz, +0.5/-1dB
- Weight
- 4.8
- Dimensions
- 1.75 inch (4.44 cm) H x 6 inch(15.24 cm) D x 19 inch (48.26 cm) W
7 detailsOther
- Cmrr
- >40dB, typically >55dB at 1kHz
- Range
- Selects either +/- 6dB or +/- 12dB slider boost/cut range
- Dynamic Range
- Typicall >112dB
- Mains Connection
- IEC receptacle
- Low Cut
- Activates the 50Hz 12dB/octave high-pass filter
- Signal to Noise
- Typically >95dB
- EQ Bypass
- Bypasses the graphic equalizer section in the signal path
