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Overview:

More sound to your amps and speakers

The secret to making speakers sound great lies with the crossover you use. With the dbx® 234xs 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 234xs 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 234xs 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 234xs 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 XLR inputs and outputs.

Features:

XLR 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

Stereo 2-way Mode:

In 2-way stereo mode the controls are marked in black BELOW the horizontal black line.Channel One and Channel Two functions are identical in the stereo mode. Front panel controls not described in this section are not active in stereo 2-way operation.

[1] & [5] Input Gain Controls the INPUT level with +/- 12 dB of gain.

[2] & [6] Low/Mid* Selects crossover point between the LOW and HIGH outputs.

[3] & [7] Low Output Controls the Low frequency output level with a range of -∞ to +6 dB.

[4] & [8] High Output Controls the High frequency output with a range of -∞ to +6 dB.

[9] & [14] Low Cut Switch for selecting the 40 Hz high pass filter. An LED indicates the selection.

[10] & [15] x10 LED Indicates that the LOW/HIGH crossover frequency range is 450 Hz to 9.6 kHz.

[11] & [16] Phase Invert Switch for reversing the polarity on the LOW Output. An LED indicates that the phase is inverted.

[12] & [17] Phase Invert Switch for reversing the polarity on the HIGH Output. An LED indicates that the phase is inverted.

[13] Stereo LED indicating stereo mode operation.

*although this control is labeled as “Low/Mid”, it operates as the crossover frequency control between low and high frequencies in stereo 2-way operation.

Stereo 3-way Mode:

In 3-way stereo operation the controls are marked in black BELOW the horizontal black line. Channel One and Channel Two functions are identical in the stereo mode. LEDs are disabled for controls which are non-functional in this mode.

[1] & [7] Input Gain Controls the INPUT level with +/- 12 dB of gain.

[2] & [8] Low/Mid Selects crossover point between LOW and MID frequencies.

[3] & [9] Mid/High Selects crossover point between MID and HIGH frequencies.

[4] & [10] Low Output Controls the Low Frequency output level with a range of -∞ to +6 dB.

[5] & [11] Mid Output Controls the Mid Frequency output with a range of -∞ to +6 dB.

[6] & [12] High Output Controls the High Frequency output with a range of -∞ to +6 dB.

[13] & [19] Low Cut Switch for selecting the 40 Hz high pass filter. An LED indicates the selection.

[14] & [20] x10 LED Indicates that the LOW/MID crossover frequency range is 450 Hz to 9.6 kHz.

[15] & [21] Phase Invert Switch for reversing the polarity on the LOW Output. An LED indicates the selection.

[16] & [22] Phase Invert Switch for reversing the polarity on the MID Output. An LED indicates the selection.

[17] & [23] Phase Invert Switch for reversing the polarity on the HIGH Output. An LED indicates the selection.

[18] Stereo LED indicating stereo mode operation.

Mono 4-way Mode:

In 4-way mono operation the controls are marked in red ABOVE the horizontal black line. Front panel controls not described in this section are not active in mono 4-way mode. LEDs are disabled for controls which are non-functional in mono 4-way mode.

[1] Input Gain Controls the INPUT level with +/- 12 dB of gain.

[2] Low/Low-Mid Selects crossover point between LOW and LOW-MID frequencies.

[3] Low-Mid/High-Mid Selects the crossover point between LOW-MID and HIGH-MID frequencies.

[4] Low Output Controls the LOW frequency output level with a range of -∞ to +6 dB.

[5] Low-Mid Output Controls the LOW-MID frequency output level with a range of -∞ to +6 dB.

[6] High-Mid/High Selects the crossover point between HIGH-MID and HIGH frequencies.

[7] High-Mid Output Controls the HIGH-MID frequency output level with a range of -∞ to +6 dB.

[8] High Output Controls the HIGH frequency output level with a range of -∞ to +6 dB.

[9] Low Cut Switch for selecting the 40 Hz high pass filter. An LED indicates the selection.

[10] x10 LED Indicates that the LOW/LOW-MID crossover frequency range is 450 Hz to 9.6 kHz.

[11] Phase Invert Switch for reversing the polarity on the LOW Output. An LED indicates the selection.

[12] Phase Invert Switch for reversing the polarity on the LOW-MIDOutput. An LED indicates the selection.

[13] Mono LED indicating mono mode operation.

[14] Phase Invert Switch for reversing the polarity on the HIGH-MID Output. An LED indicates the selection.

[15] Phase Invert Switch for reversing the polarity on the HIGH Output. An LED indicates the selection.

Mono 3-way Mode:

In 3-way mono operation the controls are marked in red ABOVE the horizontal black line.

Front panel controls not described in this section are not active in mono 3-way mode. LEDs are disabled for controls which are non-functional in this mode.

[1] Input Gain Controls the input level with +/- 12 dB of gain.

[2] Low/Mid Selects crossover point between LOW and MID frequencies.

[3] Low Output Controls the LOW frequency output level with a range of -∞ to +6 dB.

[4] Mid/High Selects the crossover point between MID and HIGH frequencies.

[5] Mid Output Controls the MID frequency output level with a range of -∞ to +6 dB.

[6] High Output Controls the HIGH frequency output level with a range of -∞ to +6 dB.

[7] Low Cut Switch for selecting the 40 Hz high pass filter. An LED indicates the selection.

[8] x10 LED Indicates that the LOW/MID crossover range is 450 Hz to 9.6 kHz.

[9] Phase Invert Switch for reversing the polarity on the LOW Output. An LED indicates that the phase is reversed.

[10] Mono LED indicating mono mode operation.

[11] x10 LED Indicates that the MID/HIGH crossover frequency range is 450 Hz to 9.6 kHz

[12] Phase Invert Switch for reversing the polarity on the MID Output. An LED indicates that the phase is reversed.

[13] Phase Invert Switch for reversing the polarity on the High Output. An LED indicates that the phase is reversed.

Specifications:

Input Connectors : XLR
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: XLR
Output Type: Impedance-balanaced/unbalanced, RF filtered
Output Impedance: Balanced 60 ohm, unbalanced 30 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)