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200W/100W Audio Bi-Amplifier, w/ Linkwitz-Riley Crossover [XAMP-M4]

200W/100W Audio Bi-Amplifier, w/ Linkwitz-Riley Crossover [XAMP-M4]

  • $ 6995

Bi-Amping your speakers is the most powerful, low cost, and simplest way for audio enthusiasts to enter the realm of true audiophile quality.

If you want to learn about active crossovers and why you definitely need to dump your passive crossovers ~ please read our post about the advantages of Active Bi-Amping

  • 2-way active cross-over drives dual on-board power amplifiers separately drive the woofer and  tweeter
  • All Analog Design
  • Linkwitz-Riley crossover, 4th order, 24dB/Octave
  • Dual LM3886 chips in bridged configuration to produce 200W peak on the bass channel
  • LM4766 amplifier chips in bridged configuration to produce 100W peak on the tweeter
  • Crossover frequency configuration components are located on a single socketed module – it’s very quick and easy to change the XO frequency by simply snapping in a new module.
  • We offer a wide range of standard XO frequency modules. Simply select your desired XO frequency from the list below and specify it in the 'Special Instructions' box on the shopping cart page.
  • Supports Baffle Step Compensation (BSC). The BSC gain is adjustable and the frequency is configurable to support various baffle sizes
  • Channels are phase aligned to within a fraction of a degree to minimize distortion at and around the XO frequency
  • Separate bass and treble output gain adjustments via precision multi-turn trim-pots
  • Low power consumption and no negative supply needed - perfect for portable battery powered speakers
  • Quiet power ON / power OFF
  • This is a mono device, two units are needed for stereo operation
  • This is an intermediate electronic kit containing 130 components, and can be assembled in about 2-3 hours
  • Made in USA


    • THD:                                 < 0.025%  (check here for detailed test data)
    • THD+N:                            < 0.05%
    • IMD:                                 < 0.09%
    • Frequency Response:         Linear from 10Hz – 80KHz
    • Input Impedance:              20K ohms
    • Input Overload:                 3.8V peak-to-peak
    • Voltage Gain:                    Adjustable, Max 27dB
    • Power Out, Woofer:          66W RMS into 8 ohms, 106W RMS into 4 ohms
    • Power Out, Tweeter:         53W RMS into 8 ohms, 36W RMS into 4 ohms
    • Filter Topology:                 Linkwitz-Riley, Constant Voltage, 4th Order, 24dB/octave
    • Amplifier Type:                 Class AB
    • Power supply:                   24V–50V DC, Single positive DC rail (no negative supply required)
    • Input Jack:                       RCA for unbalanced, 3.5mm TRS for balanced
    • PCB Dimensions:               3.75” x 3.6” x 2” high (86mm x 91mm x 51mm)


    • Active monitors
    • Speaker Bi-Amp conversions
    • Bi-Amplified Active Speaker System
    • Portable boom-box
    • Portable guitar amplifier

    We support the following Crossover frequencies. When ordering, please specify your desired crossover frequency in the 'Special Instructions' box on the shopping cart page:

      • Any multiple of 10Hz from 60Hz-200Hz (e.g. 60Hz, 70Hz, ... 200Hz)
      • 250Hz
      • Any multiple of 100Hz from 300Hz-4000Hz
      • Any multiple of 500Hz from 4500Hz-7000Hz

    Preview the Instruction Manual

    Additional XO Modules are available here

    Or use our simple Linkwitz-Riley calculator to select any custom XO frequency

    Learn more about Bi-Amping: Benefits of Bi-Amping (Not Quite Magic, But Close) and Bi-amping and tri-amping

    What is Bi-Amping? It is the replacement of your speaker’s passive crossover, a source of audible distortion of your sound, with a precise Active Crossover placed ahead of your power amps. The power amplifiers drive the woofer and tweeter directly with no passive components getting in the way. The result is nothing short of breathtaking. You’ll hear detail and color in your music you’ve never heard before. The sound stage opens wide in all dimensions, and you can picture every instrument as if it was in the room with you.

    One of the most important specs for an active crossover is phase coherence. This is the alignment in time of the high and low outputs. If these are out of phase, sounds that are at or near the crossover frequency will be significantly distorted, because both the woofer and tweeter are both driving at this frequency, and if the channels are out of phase they will each be creating slightly different sound, which creates distortion. This video shows how precisely our channel phases are aligned:


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