Crossovers

Dahlquist DQLP1 approx 13" wide recapped 6/18 The Dahlquist DQ-LP1 is a unique line-level crossover which combines an electronic Low-Pass filter with a passive High-Pass filter. The LP1 is intended primarily for integrating a subwoofer into an otherwise full range loudspeaker system. It may also be used to bi-amplify a single loudspeaker system where the crossover point is tunable from 40 to 400 Hz. As with other electronic crossovers, the LP1 is connected between the preamplifier and the two power amplifiers; one amplifier feeds the main speaker, the other drives the subwoofer(s). The active Low-Pass section, which feeds the subwoofer amplifier, is continuously variable from 40 to 400 Hz and provides a cut-off rate of 18db per octave. This steep slope is achieved through a non-ringing, staggered arrangement of 6-12-18 db/octave slopes, preserving bass transients. Distortion is exceptionally low, measuring 0.005% THD. Of particular importance in a device of this type is the performance of the High-Pass section which feeds the main power amplifier. Any distortion introduced in this stage will noticeably degrade the important middle and upper frequencies. In order to avoid such degradation, the 6db/octave High-Pass section of the LP1 is purely passive and can be set for any desired crossover frequency by inserting a capacitor and/or resistor into the terminals provided on the LP1's printed circuit board. The front panel frequency control does not effect the High-Pass frequency. Push-button switch S1 allows complete passive defeat of the High-Pass section and muting of the low frequency section to instantly restore the system to single amplifier operation. This combination of active and passive circuitry insures the sharp cut-off and tuneability required to best integrate a subwoofer with a loudspeaker. The Owner's manual provides instructions for the hook-up and tuning of the LP1, including an easy to use chart showing the appropriate combination of resistors &/or capacitors to achieve a variety of crossover points. Learn More

B&W Bowers & Wilkens CT8 XO MK2 https://www.bowers-wilkins-custom-id.com/speakers/ct8-xo-mk2/ Working with world-leading audio component manufacturer Classé, B&W has developed a bass management system for the CT800 range whose clarity and power will leave you speechless. In conventional home theatre systems, the very low bass from the front and surround channels is often squeezed into a single subwoofer along with the Low Frequency Effects (LFE) channel. Contrast this with a CT800 system, where a subwoofer is actively combined with each of the front left and right channels, so that they are truly full range and preserve directional information to the lowest frequencies as intended. In fact you can assign up to 4 subwoofers to any of the front or surround channels. The single LFE channel is then distributed to all the subwoofers, giving a much more natural sensation of space and ambience. Even at very high volumes, the system retains consummate control over its output. All you have to do is hold on to your seat Learn More

QSC DSP-4 6 available as of 3/23 price for each includes power supply. If you buy multiples you can have the middle atlantic rack part that holds them for free. DSP-4 FEATURES QSC DSP-4 Digital Signal Processor QSC has more than three decades of experience pioneering cutting edge audio products, and once again they raise the bar with the DSP-4 Digital Signal Processing Module. This compact module offers two channels of independent DSP and attaches to the back of most 2-channel DataPort-equipped QSC amplifiers-without occupying any additional rack space. Capitalizing on the success of our DSP-3, the second-generation DSP-4 provides several enhancements in functionality and performance while also incorporating the universally popular XLR balanced connectors. These enhancements include new A/D and D/A converters for improved signal-to-noise performance and upgraded software that significantly increases the unit's operational characteristics. Powerful Simple to install, compact, and featuring "set-and-forget" convenience, the DSP-4's powerful processor enables you to perform a wide range of signal processing functions; and with its new A/D and D/A converters, its noise floor improves. Whether you need speaker crossovers, EQ, time delay, or subsonic filters, the DSP-4 is as flexible as your system's needs. Each Channel Includes: Crossover filtering Multiple parametric EQs Shelf filtering Tone and noise generation Precision attenuation Multiple delays (up to 910 ms) Mixing Compression and limiting Configurable The DSP-4's processing horsepower is dynamically assignable so you are not limited by a fixed signal chain. Simply use QSC's powerful PC-based Signal Manager software to easily configure multiple processing functions and signal flow with "drag-and-drop" tools. Hardware Two independent channels of DSP 48kHz, 24-bit converters No turn on pops or zipper noise If the memory or hardware fails, unit turns on muted to prevent driver damage Host interface via RS-232 or QSControl Audio Network System via CM16a Amplifier Network Monitor Electronically balanced XLR inputs Contact closure to trigger preset changes Post-DSP output signal for daisy-chaining Peak and RMS meter displays with clip indication DataPort pass-through compatible with QSControl Selectable input sensitivity: 1.5, 4, 9, 18 Vrms; 6, 14.5, 21.5, 27.5 dBu; 3.5, 12, 19, 25 dBV Output signal gain (to be released) Software "Drag-and-drop" configuration software DSP processing power and memory is dynamically assigned to signal processing functions - eliminating the limitations imposed by fixed signal chain designs Graphical representation of DSP resources Firmware upgrades via RS-232 Hard copy printout of signal flow layout or parameter settings DSP-4 FUNCTIONS Multiple Parametric Filters, assignable anywhere in the signal chain:Variable Frequency Variable Gain Variable Q Bypass (one EQ Band) Bypass all EQs Add EQ Delete EQ Show Response Multiple Delays, assignable anywhere in the signal chain910 msec Maximum 20.83 μsec Incremental Dynamics processor with Compressor assignable anywhere in the signal chain: Gain Threshold Ratio Attack Time Release Time Show Response Bypass Output Peak Limiter, assignable anywhere in the signal chain:Gain Threshold Attack Time Release Time Show Response Bypass High and Low-Pass Crossover Filters, assignable anywhere in the signal chain:Butterworth 6, 12, 18, 24 dB per octave slope Bessel 6, 12, 18, 24 dB per octave slope Linkwitz-Riley 12 and 24 dB per octave slope Bypass (one EQ Band) Bypass all EQs Add EQ Delete EQ Show Response High and Low-Pass Shelf Filters, assignable anywhere in the signal chain: Variable Corner Frequency Variable Gain Variable Q Bypass (one EQ Band) Bypass all EQs Add EQ Delete EQ Show Response Signal Mute Attenuation: 0.1 dB steps Mix Audio (2 to 1 Mixer) Signal Splitter Built-in Noise Generator (Pink & White) Built-in Variable Frequency Tone Generator Signal Polarity Reversal RMS and Peak Metering with Clip Indication Add or delete up to 7 additional bands of "EQ" per filter block Visual editing of composite filter response, using cursor controls in graphical display Individual or group bypass of EQ bands per filter block "Predictive Delay" feature- produces less signal distortion than analog compressor/limiters-especially for fast attack times Learn More

JBL SDEC-4500 $7000 retail SDEC-4500P Highlights 12-channel Input, 4-channel output, over 500-band parametric EQ, bass management with 16 high pass filters and 4 low pass filters, 8 phase filters, bass/treble/thx re-eq circuit, speaker drive pre-EQ, screen and speaker cloth pre-EQ correction Speaker time delay correction for all 20 outputs Patented Sound Field Management (SFM) when used with JBL Synthesis ARCOS calibration system Patented Auto Curve Sum for Subwoofer to Main speaker optimization when used with JBL Synthesis ARCOS calibration system Active 2-way (x3 channels) crossover for bi-amplification of Left-Center-Right speakers with pre and post crossover drive shaping Learn More

Krell KBX custom for Wilson Whow subwoofer. Learn More