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The XR-Series crossovers are the product of an intensive research effort started in 1972 which combined a reexamination of traditional crossover theory with practical field use. Over the years, a number of refinements and new models have been added to our crossover series, but the original design goals have remained the same: to produce a crossover which is sonically accurate, is flexible enough to suit a wide variety of systems, and affords maximum protection for speakers and drivers.
All Ashly crossovers are based upon the same powerful state-variable filter circuit, which guarantees that two adjacent frequency band outputs always remain in phase. Our crossovers offer a number of useful and unusual features, including continuous tuning, a response control, and a unique output stage which maintains low noise at any level setting. These models also include a 200:1 tuning range, output mute switches, and both TRS and XLR connectors. Like other Ashly products, your crossover features low noise and distortion, active balanced inputs, a peak level indicator, a precision regulated power supply, protection against abnormal input or output conditions, and rugged mechanical construction. Conservative design and an unusually thorough procedure for quality control have earned Ashly a reputation for dependability in the recording, sound reinforcement, and broadcast fields.
Response Control an Ashly Exclusive... This control, found adjacent to the crossover frequency control, adjusts the damping of the filter affecting the response shape of the filters at the crossover point. The dial calibrations refer to the amount of attenuation effected by the filter at the crossover frequency, i.e., a setting of 3dB means that the filter's high-pass and low-pass outputs are each "rolled off 3dB at the crossover point“. This describes Butterworth filter response, or a gentle 3dB peak at the crossover point when the two filter output signals overlap. To obtain a flat signal, or "Linkowitz-Riley" response through the crossover region, set the Response control to "6“. This attenuates each output of the filter by 6dB at the crossover point (two identical signals added together yield a +6dB increase). To obtain a notch at the crossover point, turn down the response control past "6" to best suit your needs.
The purpose of this control is to help offset the inaccuracies inherent in typical loudspeakers, thereby helping you to achieve a flat system response. NOTE: The Response control is not a "slope" control. A 24dB/octave crossover will always have a slope of 24dB/octave. The Response control only affects filter response shape in the immediate vicinity of the crossover frequency; the ultimate crossover slope is a fixed parameter.
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24dB/Octave Slopes |
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Variable Filter Response Allows Tuning-In Linkwitz-Riley or Other Filters |
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Output Mute Switches |
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Balanced Inputs and Outputs |
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20Hz Third Order High Pass Filter |
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XLR and 1/4" TRS Audio Connections |
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Peak Overload Warning LEDs |
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Five Year Warranty | | Behringer DCX2496 Overview
The DCX2496 ULTRADRIVE PRO from Behringer is a digital loudspeaker management system, that provides excellent audio quality, along with a comprehensive feature list. It allows for precise set-up of multiple loudspeaker arrays, suitable for live sound, fixed installations that require control of loudspeaker systems, and other contractor-installed applications.
Each of the three-inputs and six-outputs have fixed processing blocks, including gain, delay, EQ and dynamic EQ on the input channels, and gain, crossover, EQs, limiter and delays on the output side. One of the inputs can accept a stereo AES/EBU digital signal. An integrated sample rate converter assists in accepting various sample rates. Additionally, an internal input-sum signal is easily set-up.
Four different mono and stereo output operating modes are available, all with individual crossover filter types with selectable roll-off characteristics. Input and output delays allow for time adjusting signals to compensate for ambient temperature changes or for adjusting arrival time differences for individual speaker clusters. EQs can be used for both musical enhancement or for level-dependent equalization. Brick-wall limiters guarantee speaker protection.
Remote control of one or several units can be accomplished utilizing downloadable software for a Windows based computer. Set-ups can be saved to the software, or to an optional PCMCIA card for the ultimate in portability. Servo-balanced, gold-plated XLR connectors for all inputs and outputs guarantee excellent connectivity.
- Three-input, six-output loudspeaker management system
- Four different mono- and stereo-output operating modes
- Individual crossover filter types including Butterworth, Bessel and Linkwitz-Riley, with selectable roll-off characteristics from 6dB to 48dB per octave
- Choice of high-, band- and low-pass filters for each input and output
- Dynamic EQ for level-dependent equalization and parametric EQ selectable for each channel
- “Zero" attack limiters on all output channels for optimal signal protection
- Automatic or manual-adjustable delays for all inputs and outputs allow for adjustment due to room temperature, phase and arrival time differences
- Link option via RS-485 network interface allows for linking multiple units for larger installation requirements
- Downloadable software enables single- or multiple-unit remote control utilizing a Windows based computer
- Sixty user-defined internal presets can bestored via software or on a PCMCIA card
- Internal universal power supply allows the unit to operate virtually anywhere
Frequency Response |
10Hz to 35kHz, -1dB |
Dynamic Range |
109dB |
Input Connections |
3 x XLR |
Output Connections |
6 x XLR |
Input Impedance |
20kΩ @ 1kHz |
Output Impedance |
160Ω @ 1kHz |
Maximum Input Level |
+22dBu |
Maximum Output Level |
+22dBu |
Sample Rate |
32kHz to 96kHz |
RTA Mic Phantom Voltage |
+15V |
Crosstalk (Main Outputs) |
-100dB @ 10dBu In |
THD & Noise |
0.007% @ 0dBu In |
Dimensions |
19" x 8.5 x 1.75" (483 x 217 x 45mm) |
Weight |
6.6 lbs (3 kg) |
| 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.
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
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 200 ohm, unbalanced 100 ohm |
Max Output |
>+21dBu balanced/unbalanced into 2k ohms or greater |
Bandwidth |
20Hz to 20kHz, +/-0.5dB |
Frequency Response |
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 |
Interchannel Crosstalk |
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 2ʼs 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) |
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With 6 inputs and 4 outputs the dbx ZonePro? 640 and 641 provide flexible signal routing,
powerful DSP processing and multiple control interfaces for Commercial Audio applications.
Designed to offer superior system sonic performance and flexibility, the 640/641 deliver the
highest quality tools available. Even the input and outputs connectors were chosen for their
standard usage and reliability. The ZonePro products offer Euroblock connectors for balanced
signals and RCA connectors for interfacing with consumer equipment often used in commercial
applications; there is also a simple analog input buss that allows inputs to be sent from one
unit to the next for unit and job scalability. The 640 and 641 provide every necessary processing
tool, from the input processing like gain control and EQ available on all inputs to highly sophisticated
and specific functions such as selectable paging microphone processing including Gating,
De-Essing, Auto Gain Control, Compression and Feedback Suppression. The heart of the
ZonePro products is the Routing module that provides of course Primary Source Selection
but also Source Ducking for Paging and Priority Override. The outputs also offer a wealth of
processing designed for commercial applications like our patent-pending AutoWarmth? function
that was co-developed with JBL to provide natural low frequency extension at any signal level.
Each output also offers EQ, Bandpass and Crossover filters, Limiting and Delay for system
optimization. With the ZonePro? every tool is at your disposal to maximize the response of
your system.
Beyond processing, the ZonePro? products offer multiple forms of control to further extend the
versatility of your system. From easy-to-use wall panel Zone Controllers for standard end-user
functions like source select and volume control to advanced system control including a built-in
Real Time Clock that can provide programmable system changes throughout the day or week.
For system setup and monitoring the ZonePro Designer software provides an intuitive interface
and a speedy setup Wizard for configuring and editing all system parameters.
The ZonePro? 640 and 641 will take your Commercial Audio system to the next level with advanced
processing, versatility and control.
? Advanced Feedback Suppression (AFS?)
? Autowarmth?
? Auto Gain Control
? Compression
? Limiting
? Noise Gating
? Notch Filtering
? Bandpass and Crossover Filters
? Parametric EQ
? Security Lockout
? Wall Panel Control
? RS-232 Control
? Windows? 2000 and XP GUI
? IEC, UL and CSA Approvals
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- 2 analog inputs and 6 analog outputs for maximum flexibility
- High-end 96 kHz converters for ultimate signal integrity and wide dynamic range (120 dB)
- Precise Dynamic EQs for level-dependent equalization and extremely musical Parametric EQs, selectable for all inputs and outputs
- Several types of EQs (LP/BP/HP) for each input and output
- “Zero“-attack Limiters on all output channels for optimal speaker protection
- Four different mono and stereo output operating modes
- Individual crossover filter types (Butterworth, Bessel and Linkwitz-Riley) with selectable roll-off characteristics from 6 to 48 dB/octave
- Adjustable Delays for all inputs and outputs—allow manual or automatic correction for room temperature, phase and arrival time differences
- 60 user-defined internal presets storable
- Servo-balanced, gold-plated XLR connectors for all inputs and outputs
- Internal switch-mode power supply for maximum flexibility (100 - 240 V~), noise-free audio, superior transient response plus low power consumption for energy saving
- High-quality components and exceptionally rugged construction ensure long life
- Conceived and designed by BEHRINGER Germany
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With 6 inputs and 4 outputs the dbx ZonePro? 640 and 641 provide flexible signal routing,
powerful DSP processing and multiple control interfaces for Commercial Audio applications.
Designed to offer superior system sonic performance and flexibility, the 640/641 deliver the
highest quality tools available. Even the input and outputs connectors were chosen for their
standard usage and reliability. The ZonePro products offer Euroblock connectors for balanced
signals and RCA connectors for interfacing with consumer equipment often used in commercial
applications; there is also a simple analog input buss that allows inputs to be sent from one
unit to the next for unit and job scalability. The 640 and 641 provide every necessary processing
tool, from the input processing like gain control and EQ available on all inputs to highly sophisticated
and specific functions such as selectable paging microphone processing including Gating,
De-Essing, Auto Gain Control, Compression and Feedback Suppression. The heart of the
ZonePro products is the Routing module that provides of course Primary Source Selection
but also Source Ducking for Paging and Priority Override. The outputs also offer a wealth of
processing designed for commercial applications like our patent-pending AutoWarmth? function
that was co-developed with JBL to provide natural low frequency extension at any signal level.
Each output also offers EQ, Bandpass and Crossover filters, Limiting and Delay for system
optimization. With the ZonePro? every tool is at your disposal to maximize the response of
your system.
Beyond processing, the ZonePro? products offer multiple forms of control to further extend the
versatility of your system. From easy-to-use wall panel Zone Controllers for standard end-user
functions like source select and volume control to advanced system control including a built-in
Real Time Clock that can provide programmable system changes throughout the day or week.
For system setup and monitoring the ZonePro Designer software provides an intuitive interface
and a speedy setup Wizard for configuring and editing all system parameters.
The ZonePro? 640 and 641 will take your Commercial Audio system to the next level with advanced
processing, versatility and control.
? Advanced Feedback Suppression (AFS?)
? Autowarmth?
? Auto Gain Control
? Compression
? Limiting
? Noise Gating
? Notch Filtering
? Bandpass and Crossover Filters
? Parametric EQ
? Security Lockout
? Wall Panel Control
? RS-232 Control
? Windows? 2000 and XP GUI
? IEC, UL and CSA Approvals
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