Loyola Enterprises

A veteran and minority owned SDB Certified Business.


DBX 234

757.498.6118 Ext - 109DBX 234 - Call for pricing - Stereo 2,3 Way/Mono 4-Way Crossover


PDFDBX 234 Cut Sheet (pdf)

PDFDBX 223/234 Manual (pdf)

Just take a look at the construction features of the dbx® 234. At first glance you’ll notice the units are great looking, and as you turn the controls something else becomes apparent; these units are extremely well built. The controls exude great precision, and the feel is a solid “click.” Also, when you open the box, you won’t find the external power supply that accompanies most processors in this price range. That’s because dbx knows how difficult external power supplies can be to work with and even though it costs a little more they put the high quality power supply right in the unit. All the inputs and outputs are TRS differentially balanced ¼" jacks that are bolted down to the chassis. This “nutting down” of the jacks insures that even if someone steps on a cable plugged into the unit, it’s not going to tear up the circuit board inside. All dbx crossovers feature Linkwitz-Riley 24 dB per octave filters, the professional standard, but then again, what did you expect?

Via two switches on the back panel you first select whether you’re operating your system in stereo 2-way, 3-way or mono 4-way. Another back panel switch also selects whether or not you want to mono sum the LF (subwoofer) out. (Most systems that use a subwoofer are mono subbed to take advantage of amplifier power and because low frequencies are non-directional.) Back panel switches allow you to select the range of the crossover frequencies individually for both channels. The crossover frequency controls have a green LED that indicates the X10 switch on the back panel is activated (they wouldn’t make you check the switch position on the back every time you wonder where it’s set). All these switches are on the back panel because it could be disastrous if you were to change them mid-program. On the front panel you’ll notice there are LEDs that indicate whether the unit is in mono or stereo mode. Each channel has an input gain control for proper level setting. There’s a recessed 40 Hz low cut (HPF) on each channel to remove unwanted low frequencies. Both the low and high outputs on each channel have a gain control ranging from -infinity to +6 dB, to allow muting of individual outputs and for level matching. Also, these outputs each have phase reverse switches that’ll help get you out of a bind without having to reconfigure your system. These phase reverse switches may be internally reconfigured as mute switches.


  • TRS differentially balanced ins and outs
  • Mode switches for mono 4-way or stereo 2-way/3-way operation
  • Low frequency summed (subwoofer) output
  • x10 range switch on both channels
  • 40Hz high pass (low cut) filter both channels
  • Phase reverse switch on all outputs
  • Individual level controls on all band outputs
  • 24dB per octave Linkwitz-Riley filters (the professional standard)
  • Stereo/Mono status LEDs indicate the selected mode
  • dbx® 2 year parts and labor as standard
  • CSA NRTL/C approved
  • CE compliant

Connectors ¼" TRS
Type Electronically balanced/unbalanced, RF filtered
Impedance (bal./unbal.) >50 kΩ / >25 kΩ
Max. Input Level >+21dBu balanced or unbalanced
CMRR >40 dB, typically >55 dB at 1 kHz
Connector ¼" TRS
Type Impedance-balanced/unbalanced, RF filtered
Impedance (bal./unbal.) 200 Ω / 100 Ω
Max. Output Level >+21dBu balanced/unbalanced into 2kΩ or greater
System Performance
Bandwidth (+0/-0.5dB) 20 Hz–20 kHz
Frequency Response (+0/-3dB) <3 Hz >90 kHz
Dynamic Range (unweighted) >114 dB, any output
Signal-to-Noise (low/mid/high) >94 dB / >93 dB / >92 dB
THD+Noise @ 1 kHz <0.004% at +4 dBu; <0.04% at +20 dBu
Interchannel Crosstalk (20–20k Hz) <-80 dB
Crossover Frequencies
Stereo Mode 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting)
Mono Mode 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting)
Filter Type Linkwitz-Riley, 24 dB/octave, state-variable
Function Switches
Low Cut Activates the 40 Hz Butterworth 12dB/octave high-pass filter, one switch per channel
Phase Invert Inverts the phase at the output, one switch per output.
x1 / x10 Multiplies the low-high(mono: low/mid and high/mid) crossover frequency range of the front-panel markings by a factor of 1 or 10, one switch per channel.
Mode Selects stereo 2-way or mono 3-way operation and disables all LEDs for controls that are non-functional in the selected mode.
LF Sum Selects normal (stereo) or mono-summed low frequency operation and disables Ch 2’s low output phase invert LED to indicate that this output is not operational in the LF sum mode.
Stereo Operation 1 LED: green
Mono Operation 1 LED: yellow
Low Cut 1 LED: red
x10 1 LED: green
Phase Invert 1 LED: red
Power Requirements 100-230V 50/60 Hz, 15 Watts
Weight 1.8 kg (4.0 lbs)
Dimensions (HxWxD) 4.45 x 48.3 x 17.5 cm (1.75" x 19.0" x 6.9")
For pricing options and packages, contact us at
757.498.6118 Ext - 109, Or