dbx 234s Stereo/Mono Crossover

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 secret to making speakers sound great lies with the crossover you use. 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 inputs and outputs.

dbx 234s Features

• 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 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

• 234s stereo 2/3 way / mono 4-way crossover1

• Input Connectors1/4" TRS
• Input Typeelectronically balanced/unbalanced, RF filtered
• Input ImpedanceBalanced >50k ohm, unbalanced >25k ohm
• Max Input>+22dBu balanced or unbalanced
• CMRR>40dB, typically >55dB at 1kHz
• Output Connectors1/4" TRS
• Output Typeimpedance-balanaced/unbalanced, RF filtered
• Output Impedancebalanced 200 Ω, unbalanced 100 Ω
• Max Output>+21dBu balanced/unbalanced into 2k ohms or greater
• Bandwidth20Hz to 20kHz, +/-0.5dB
• Frequency Response< 3 Hz to > 90 kHz, +0/-3 dB
• Signal to Noise RatioRef: +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 TypeLinkwitz-Riley, 24 dB/octave, state-variable
• Low Cut Switchactivates 40 Hz Butterworth, 12 dB/octave high-pass filter, one switch per channel
• Phase Invert Switchinverts the phase at the output, one switch per output
• x1/x10 Switchmultiplies 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 channe
• Mode Switchselects stereo/mono and 2/3/4-way operation
• LF Sum Switchselects 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 Voltage100-120 VAC 50/60Hz; 120 VAC 60Hz 230 VAC 50/60Hz
• Operating Temperature32°F to 113°F (0°C to 45°C)
• Power Consumption15W
• Power ConnectorIEC receptacle
• Dimensions (HxWxD)1.75x19x6.9"
• Weight4 pounds