XM126 Vacuum Tube Electronic Crossover Network

Uses Vacuum Tube technology for superior sound quality.
Available 2-way, 3-way or 4-way.
Steep 24 dB/octave slope.
Slopes of 6dB/oct, 12dB/oct , 18dB/oct and 24dB/oct available.
Crossover frequency 20 - 20000 Hz.
Subwoofer summing option.
Heavy duty gold plated RCA connectors for input and output.
Fourth-order constant-voltage design (Linkwitz-Riley).
Outputs are always in phase on 24 dB/oct filter.
No transients during turn-on or turn-off.
Separate power supply with toroidal power transformer.     

3-way XM126 shown
click on image for expanded view

The XM126 Electronic Crossover Network is a fourth- order constant-voltage crossover design that provides both low-pass and high-pass outputs. The slope of each output is 24 dB/octave and, because of the fourth-order design, the high-pass and low-pass outputs of the crossover are always in phase with each other.
The XM126 uses 12AX7 tubes. It has a solid state regulated power supply for the filament voltage. Power is provided with a heavy duty toroidal power transformer.
The crossover frequency of XM126 Electronic Crossover Network can easily be set by replacing a frequency module. Each frequency module has the capacitors and resistors that set the crossover frequency and slope for that channel. Normal slope is 24 dB/oct, 4th order, constant voltage (Linkwitz-Riley), but modules for first, second and third order slopes are also available.
The XM126 is available as a 2-way version, a 3-way version and a 4-way version.
The XM126 front panel has 2 calibrated level controls (for left and right ) for each channel. A sum switch allows the low pass channel to be summed. This is useful when using the XM126 with a common subwoofer.
The XM126 has both balanced inputs and standard inputs. A switch on the rear panel selects between the inputs.
Available options include 24 position stepped attenuators instead of the standard 12 position attenuators for level control. These stepped attenuators are calibrated in 0.5 dB steps and allow very accurate setting of the levels for each output.
Balanced outputs are also available as an option.

Frequency response: 5Hz to 100 Khz, +/- 1 dB
Crossover frequency choice: 20 Hz - 20 KHz
Insertion gain: +6 dB with level controls at maximum.
Filter slope: 6,12,18 or 24 dB/Octave
12 step attenuator step: 1 dB/step (standard)
24 step attenuator step: 0.5 dB/step (optional)
Harmonic distortion at 1 KHz: Less than 0.1%
Signal-to-noise ratio: Better than 110 dB
Input impedance: 500KOhm
Output load capability: 10 KOhm min.
Output impedance: 500 Ohms typical
Maximum input voltage: 25 V peak-peak (10 V RMS)
Power supply requirement: 110VAC. 1A or 220VAC. 1/2A
Dimensions: 17" x 7.5" x 9" (combined dimension of 2 cabinets)
Shipping weight: approx. 22 pounds (10 Kg)

XM126-2AA......Tube electronic crossover with 12 position attenuators, 2-way model.
XM126-3AA......Tube electronic crossover with 12 position attenuators, 3-way model.
XM126-4AA......Tube electronic crossover with 12 position attenuators, 4-way model.

XM126S-2AA......Tube electronic crossover with 24 position attenuators, 2-way model.
XM126S-3AA......Tube electronic crossover with 24 position attenuators, 3-way model.
XM126S-4AA......Tube electronic crossover with 24 position attenuators, 4-way model.
XM126-FMA......Frequency module

When ordering please specify the crossover frequency.
Frequencies from 20Hz to 10KHz are available in 6,12,18 and 24 dB/oct.
Special modules are available for notch filters; please consult factory