XM126 Vacuum Tube Electronic Crossover

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.     

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 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. Thes 24-step 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.

SPECIFICATIONS:
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)

ORDERING INFORMATION:
XM126-2AA......Tube electronic crossover with 12 position attenuators, 2-way model.
XM126-2FB-AA...Tube electronic crossover with 12 position attenuators, 2-way model, Fully Balanced. 
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-2FB-AA...Tube electronic crossover with 24 position attenuators, 2-way model, Fully Balanced. 
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
Above: XM126 2-way model rear view

Above: XM126 2-way with 24 position attenuators inside view