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Summary of Contents for Marchand Electronics XM9
- Page 1 Marchand Electronics Inc. Electronic Crossover Circuit Board Model XM9 Users Manual Assembly Manual Marchand Electronics Inc. Rochester NY (c) 1990..2015 Marchand Electronics Incorporated Last updated 5 March 2015 www.marchandelec.com...
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Page 2: Installation And Use
Connectors for input, output and power make for easy assembly. The crossover frequency of the XM9 electronic crossover can The XM9 is available as a bare board, with only the PC board and easily be changed by changing the value of four resistors. These the assembly manual;... -
Page 3: Level Controls
Low pass output, RCA jack -------------------------------------------------- FREQUENCY CONTROL AND FREQUENCY MODULE: The crossover fequency of the XM9 can be set by installing the network in a typical biamping setup the crossover frequency is apropriate frequency module. When using a subwoofer, with often set at 500-2000 Hz. - Page 4 Fig 1. XM9 hookup. Off board volume controls can be used to the high anw low pass low pass control is connected to P1, the high pass control to P4 outputs and damping control of the XM9. Best results are and the damping control to P3.
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Page 5: Power Supply
The XM9 outputs can drive shielded cable lines This means that only 4 precision capacitors are needed in order to of up to about fifty feet. The XM9 is implemented with a fourth implement both fourth order functions. Both high-pass and low- order state variable filter,(see schematic diagram). -
Page 6: Crossover Frequency
The Marchand PS10 power supply is of power supply could be built as in fig 4. This supply can deliver 1 similar design. It is a good choice for powering the XM9. Fig 4. Simple regulated power supply for XM9. - Page 7 In some cases the total sound pressure at the crossover functions. frequency may show a dip, because the sum of the output power of the loudspeakers is not unity. The XM9 has an damping factor Fig 9. XM9 High-pass, Low-pass, and sum functions, with correction.
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Page 8: Parts List
(marked G) MODIFICATIONS FOR FIRST, SECOND AND THIRD ORDER OPERATION With some changes in component values the XM9 can be used as locations for the jumpers and cuts are marked on the solder side of a first, second or third order filter. The changes are shown in table the circuit board. - Page 9 E ------------------------------------------------------------------------ MODIFICATIONS FOR FOR HIGH INPUT IMPEDANCE The standard imput impedance of the XM9 is 25 Kohm. A higher op-amps used. For 100K impedance and OPA2134GP op-amps impedance can be achieved by replacing some resistors according the noise will increase by about 2dB.
- Page 10 6dB at the higher frequencies. A baffle step compensation circuit radiate more to the front of the speaker at higher frequencies. This can be installed on the XM9 circuit board. This circuit has the results in a increase in frequency response at the higher effect of reducing the high frequency response.
- Page 11 Fig 10. Typical uses of XM9 crossover network.
- Page 12 Fig 11. Top view of crossover network. Fig 12. Potentiometer cable assembly for level and damping control.
- Page 13 Fig 13. Typical installation in cabinet.
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