XM16 48 dB/Octave Electronic Crossover Network

Steep 48 dB/octave slope.
Linkwitz-Riley alignment.
Eighth order constant voltage design.
Outputs are always in phase.
Level controls for high and low pass.
Subwoofer summing option.
No turn on/off transients.
Crossover frequency 20 - 5000 Hz.
Low noise circuit design.

The XM16 electronic crossover network is an eighth order constant voltage crossover design. The crossover provides both low-pass and high-pass outputs. The slope of both outputs is 48 dB/octave. Because of the eighth order design the high-pass and low-pass outputs of the crossover are always in phase with each other. The frequency response is also known as the Linkwitz-Riley response. The very steep slope of the XM16 is very useful when driving speakers that are difficult to match, like ribbon speakers. Very little energy is transmitted to the speakers beyond the crossover point.
The XM16 is available in a two way version and a three way version. The two way version is used for bi-amplification, with separate amplifiers for the highs and the lows, and the three-way version is used for tri-amplification, with separate amplifiers for the low, mid and high frequencies. The filter can also be used to drive a subwoofer, where the subwoofer is shared by the two channels of the stereo system. A sum switch sums the low pass outputs for feeding to the common subwoofer. The crossover frequency of the XM16 electronic crossover can easily be changed by changing Frequency Modules. Each Frequency Module has eight resistors, mounted on a 16 pin DIP header, that set the value of the crossover frequency. There are a total of 4 Frequency Modules, two for each channel. One Frequency Module sets the low pass cut-off and the other Frequency Module sets the high-pass cut-off frequency. These two cut-off are usually set at the same frequency, but they can be set at different frequencies for special applications. Individual level controls for the high and low pass outputs are provided with potentiometers on the front panel. A time delay relay at the outputs of the XM16 eliminates the transients that can happen when the unit is turned on or off.
The unit uses only high grade components: 1% metal film resistors, 1% matched polystyrene film capacitors for the filter capacitors and dual FET input operational amplifiers.

Available options include 24 position stepped attenuators instead of the standard potentiometers for level control. These stepped attenuators are calibrated in 1 dB steps and allow very accurate setting of the levels for each output.
Balanced inputs/outputs are also available as an option.

SPECIFICATIONS: Frequency response: DC to 100 KHz, +/- .5 dB Crossover frequency: 20 Hz - 5 KHz Insertion gain: 6dB with level controls at maximum. 0dB (unity) with controls at center. Filterslope: 48 dB/Octave Harmonic distortion at 1KHz: less than 0.01% Signal to Noise ratio: better than 110dB Input impedance: 25 KOhm Output load capability: 2 KOhm min. Output impedance: 50 Ohm typ Maximum input voltage: 10 V peak-peak (4 V RMS) Power supply requirement: XM16-AA 120VAC XM16-A: dual regulated +15V and -15V @70 mA

Ordering Information:
XM16-AA Two way unit
XM16-3AA Three way unit
XM16S-AA Two way unit , 24 position stepped attenuators instead of potentiometers
XM16S-3AA Three way unit , 24 position stepped attenuators instead of potentiometers
XM16-A One channel board, circuit board only
XM16-FMA Frequency module (4 required for each crossover point)

Please specify the desired crossover frequency when ordering. We stock frequencies of 20, 30, 40, 50, 60, 70, 80, 90, 100, 125, 150, 200, 250, 500, 1000, 2000 and 5000 Hz, and more. For other frequencies please allow 20 extra days for shipping. If not specified the XM16 will be shipped with a crossover frequency of 100 Hz.