234XL (discontinued)

234xlfront lg medium 234xlrear lg medium

Suggested alternative: 234xs

Let's take a look at the construction features of the dbx® 234XL. 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 we know how difficult external powersupplies can be to work with and even though it costs a little more we put the high quality power supply right in the unit. All the inputs and outputs are XLR balanced 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 (we 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 - 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.

You'll get great performance, all the features you'd expect from a professional product, and the knowledge that you're buying a processor from the people that have been producing the world's finest processors for over 20 years. The technology that made us famous brings you a dbx® crossover which has been tested to the highest professional standards at a price that's just too low to admit.

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 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

Manuals/Documentation

Specifications

Input Connectors XLR
Input Type Electronically balanced/unbalanced, RF filtered
Input Impedance Balanced >50k ohm, unbalanced >25k ohm
Max Input >+21dBu balanced or unbalanced
CMRR >40dB, typically >50dB at 1kHz
Output Connectors XLR
Output Type Impedance-balanaced/unbalanced, RF filtered
Output Impedance Balanced 200 ohm, unbalanced 100 ohm
Max Output >+21dBu balanced/unbalanced into 2k 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), >92dB (High Output)
Signal-to-Noise (Mono Mode) >94dB (Low Output), >94dB (Low/Mid Output), >92dB (High/Mid Output)
Dynamic Range > 114 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/High: 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting)
Crossover Frequencies (Mono Mode) Low/Mid: 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting); High-Mid/High: 450 Hz to 9.6 kHz; Low-Mid/High-Mid: 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 2-way or mono 3-way operation and disables all LEDs for controls that are non-functional in the selected mode.
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 50/60 Hz; 120 VAC 60 Hz 230 VAC 50 Hz
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)