dbx 234s

Overview

More sound to your amps and speakers

The secret to making speakers sound great lies with the crossover you use. With the dbx® 234s Crossover you'll get great performance, ultra low-noise, rugged reliability and four decades of dbx knowledge and expertise in building the world's finest processors. The 234s uses precision filters to separate the audio signal and direct the correct frequencies to your loudspeaker drivers. By directing only the specific frequency bands to each speaker driver the 234s leaves your amplifiers free to use their full power on the usable signal eliminating distortion and giving your PA system a cleaner and better sound.

The dbx 234s is a dual channel crossover with all the features you would expect from a professional product. It features Linkwitz-Riley 24dB per octave filters, independent output gain controls for level matching, output phase inversion, 40 Hz low cut filter, and optional mono summing of the low frequency (subwoofer) output. Everything in the design exudes great precision from the solid "click" controls to the high quality 1/4" TRS ('s' model) or XLR ('xs' model) inputs and outputs.

Key features

Phase reverse switch on all outputs
Individual level controls on all 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
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

Specifications

Input Connectors	1/4" TRS
Input Type	Electronically balanced/unbalanced, RF filtered
Input Impedance	Balanced >50k ohm, unbalanced >25k ohm
Max Input	>+22dBu balanced or unbalanced
CMRR	>40dB, typically >55dB at 1kHz
Output Connectors	1/4" TRS
Output Type	Impedance-balanaced/unbalanced, RF filtered
Output Impedance	Balanced 200 ohm, unbalanced 100 ohm
Max Output	>+21dBu balanced/unbalanced into 2k ohms or greater
Bandwidth	20Hz to 20kHz, +/-0.5dB
Frequency Response	< 3 Hz to > 90 kHz, +0/-3 dB
Signal to Noise Ratio	Ref: +4 dBu, 22 kHz measurement bandwidth
Signal-to-Noise (Stereo Mode)	>94dB (Low Output), >93dB (Mid Output), >90dB (High Output)
Signal-to-Noise (Mono Mode)	>94dB (Low Output, Low/Mid Output); >92dB (High/Mid Output); >88dB (High Output)
Dynamic Range	> 106 dB, unweighted, any output
THD+Noise	< 0.004% at +4 dBu, 1 kHz; < 0.04% at +20 dBu, 1 kHz
Interchannel Crosstalk	< -80 dB, 20 Hz to 20 kHz
Crossover Frequencies (Stereo Mode)	Low/Mid: 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting); Low/High: 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting); Mid/High 450Hz to 9.6kHz (x10 setting)
Crossover Frequencies (Mono Mode)	Low/Low-Mid: 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting); Low-Mid/High-Mid: 450 Hz to 9.6 kHz; High-Mid/High: 450 Hz to 9.6 kHz
Crossover Filter Type	Linkwitz-Riley, 24 dB/octave, state-variable
Low cut Switch	Activates 40 Hz Butterworth, 12 dB/octave high-pass filter, one switch per channel.
Phase Invert Switch	Inverts the phase at the output, one switch per output.
x1 / x10 Switch	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 Switch	Selects stereo/mono and 2/3/4-way operation
LF Sum Switch	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.
Indicators	Stereo Operation (Green); Mono Operation (Yellow); Low Cut (Red-per channel); x10 (Green-per channel); Phase Invert (Red-per output)
Operating Voltage	100-120 VAC 50/60Hz; 120 VAC 60Hz 230 VAC 50/60Hz
Operating Temperature	32°F to 113°F (0°C to 45°C)
Power Consumption	15W
Power Connector	IEC receptacle
Dimensions	1.75" H X 19" W X 6.9" D (4.4cm x 48.3cm x 17.5cm)
Unit Weight	4.0 lbs. (1.8 kg)
Shipping Weight	5.8 lbs. (2.6 kg)