Marchand Electronics Inc. XM44 Universal electronic crossover Available 1-, 2-, 3- or 4-way. January 2014

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Allyson Banks
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1 Marchand Electronics Inc. PO Bo, ochester, NY Tel:() 0 Fa:() info@marchandelec.com (c) Marchand Electronics Inc. XM Universal electronic crossover Available -, -, - or -way. January 0 00,, Marchand Electronics Inc. () 0

level inputs Balanced inputs for high noise immunity Standard line level inputs position attenuators standard position attenuators optional Amp Worldwide AC power compatibility Standard line cord for

2 Features.. XL Balanced inputs (optional) CA inputs XL Balanced outputs (optional) CA outputs Level attenuators Fuse /0VAC switch Power entry connector Balanced inputs for high noise immunity Standard line level inputs Balanced inputs for high noise immunity Standard line level inputs position attenuators standard position attenuators optional Amp Worldwide AC power compatibility Standard line cord for V AC operation. Specifications. Frequency response: Harmonic KHz Ma input voltage Voltage gain (CA outputs) (XL outputs) Common mode rejection (XL) Input impedance (CA, XL) Power requirement Construction Dimensions: Weight: DC - 0KHz +/- db 0.0% or better VMS 0dB(X) with attenuator in center position db(x) with attenuator in center position Better than 0dB K KOhm VAC/0 VAC, A fuse All metal cabinet, black with white legend. (WHD) lbs Panels show -way crossover 00,, Marchand Electronics Inc. () 0

Frequency modules The crossover points of the XM are set using plug-in frequency modules. The frequency modules plug into position card-edge connectors on the main circuit board.

3 Frequency modules The crossover points of the XM are set using plug-in frequency modules. The frequency modules plug into position card-edge connectors on the main circuit board. There are two main types of frequency modules: high pass modules and low-pass modules. Each of these frequency modules are available in any frequency and with slopes of,, and db/octave. Specialty modules are available for implementing special functions, like notch filters or delays. is inserted the enable jumper on that slot needs to be set to off. If a module is used in that slot the enable jumper on that slot needs to be set to on. Typically, the low pass section (section ) will only have a low-pass module in. The high pass section (section ) will only have a high-pass module in. In a -way crossover the mid section (sec ) will have a low pass module in and a high-pass module in. Note the setting of the jumper. See figure below and on net page for eamples. Notch filters and delays are implemented with modules in and. Typical frequency module. Each channel of the XM has module slots. These can take any kind of module. The slots are marked, and. Slot and are optional. If no module XM main circuit board (only one section shown ) SEC. F O N 0Hz LP 0Hz LP E legend HP High pass module Jumper in 'off' position LP Low pass module Jumper in 'on' position 0Hz T Crossover frequency Empty module slot 00,, Marchand Electronics Inc. () 0 A

4 XM main circuit board XM main circuit board SEC. SEC. F O E N 0Hz HP 000Hz LP E A T Jumper in 'on' position 0Hz Crossover frequency HP High pass module LP Low pass module Jumper in 'on' position 0Hz Crossover frequency Empty module slot Typical -way crossover with 0Hz and 000Hz crossover point Typical -way crossover with 0Hz crossover point XM main circuit board XM main circuit board SEC. SEC. 0Hz LP 0Hz LP 0Hz HP 000Hz LP 0Hz HP 000Hz LP 0Hz LP SEC. 0Hz LP SEC. SEC. 000Hz HP 000Hz LP 000Hz HP T 000Hz HP Jumper in 'off' position Empty module slot O legend LP Low pass module 000Hz HP HP High pass module Jumper in 'off' position 0Hz HP legend 0Hz HP N 000Hz LP SEC. 0Hz HP O SEC. F 0Hz LP SEC. A T SEC. N SEC. 0Hz LP SEC. F 0Hz LP 0Hz LP 000Hz LP SEC. F E A O N 0Hz HP 000Hz LP 0Hz Notch 0Hz Notch 0Hz HP 000Hz LP SEC. SEC. 000Hz HP legend 000Hz HP HP High pass module 000Hz HP legend 000Hz HP HP High pass module Jumper in 'off' position LP Low pass module Jumper in 'off' position LP Low pass module Jumper in 'on' position 0Hz Jumper in 'on' position Notch Crossover frequency Empty module slot Typical -way crossover with 0Hz, 000Hz and 000Hz crossover point Notch filter Empty module slot -way crossover with 0Hz and 000Hz crossover point and notch filter on mid 00,, Marchand Electronics Inc. () 0 E A T

5 High Pass for 00Hz Low Pass for 00Hz C.0K.K C.K C C.0K.K C C.0K.K C.K C C.0K.K C Table component selection for frequency module for standard db/oct, Constant Voltage (Linkwitz-iley) alignment. 00,, Marchand Electronics Inc. () 0

6 High Pass for 00Hz Low Pass for 00Hz J J C.K.K C C.K.K C +.K C + C.K.K C Table component selection for frequency module for db/oct, Butterworth High Pass for 00Hz Low Pass for 00Hz J J J C.0K.K C.K C C.0K.K C J Table component selection for frequency module for db/oct, Butterworth High Pass for 00Hz Low Pass for 00Hz J J C.K.K C J J C.K.K C Table component selection for frequency module for db/oct, Constant Voltage (Linkwitz-iley) alignment. 00,, Marchand Electronics Inc. () 0

7 High Pass for 00Hz Low Pass for 00Hz J J C.K.K C J J J J Table component selection for frequency module for db/oct High Pass for 00Hz Low Pass for 00Hz C.K.K C Not used C C.K K C C.K.K C 000pF (0.0uF) Not used C 00pF C.K K C Table component selection for frequency module for standard db/oct, Constant Voltage (Linkwitz-iley) alignment. IMPOTANT NOTE: TWO of these modules are required for each channel 00,, Marchand Electronics Inc. () 0

8 Module for baffle step compensation (.0KHz =.") for 00Hz K C jumper C K Jumper Table component selection for notch filter XM frequency module Modification for notch filter ear of XM Cut is db above KHz. For different frequency, scale all capacitors inversely with frequency. For eample, C=(00/F)*; where if is new frequency.. Spice simulator by Linear Technology 00,, Marchand Electronics Inc. () 0

9 Module for ribbon frequency response correction ( KHz peaking) for 00Hz.K C C.K C 0pF jumper jumper Table component selection for notch filter XM frequency module Modification for notch filter ear of XM Peaking is db at KHz. For different frequency, scale all capacitors inversely with frequency. For eample, C=C=(00/F)*, C=(00/F)*0pF; where if is new frequency.. Spice simulator by Linear Technology 00,, Marchand Electronics Inc. () 0

notch filter ear of XM For different frequency, scale all capacitors inversely with frequency.

10 Module for notch filter for 00Hz.K C K C K C Table component selection for notch filter XM frequency module Modification for notch filter ear of XM For different frequency, scale all capacitors inversely with frequency. For eample, C=C=(00/F)*; where if is new frequency Spice simulator by Linear Technology 00,, Marchand Electronics Inc. () 0

11 Module for Bass boost (Linkwitz transformer) efer to Ecel spreadsheet XMBC Spreadsheet reference Component value Typical value for f(0)=0hz, F(p)=0Hz, Q(0)=0.0, Q(p)=0.0 K K 0K 0K 0K 0K Jumper Jumper C C C C 0. uf C C 0. uf C C 0. uf C C 0.0 uf 00,, Marchand Electronics Inc. () 0

Module for Attenuation (flat frequency response) Use blank circuit board XMUAF XMUAF Component value K00 see table----> K00 K00 C C Attenuation Value db db K db K Hints: A: If no sound at all,

12 Module for Attenuation (flat frequency response) Use blank circuit board XMUAF XMUAF Component value K00 see table----> K00 K00 C C Attenuation Value db db K db K Hints: A: If no sound at all, perhaps module is reversed in slot. (action reverse module) B: If module has no effect, make sure jumper net to module is in ON position Install in or slot on main circuit board. Be sure to set jumper in ON position. 00,, Marchand Electronics Inc. () 0 Facing rear of XM crossover

13 XM main circuit board parts list esistors nu nu *** K K. Ohm. Ohm. Ohm nu nu*** K K. Ohm. Ohm. Ohm 0K K K 0K K K ( K in sec. only) ( K in sec. only) Capacitors C C C C C C C C C C C C C C C C C C C C0 C C C C C C C C C C C C C C C C C C C0 C0 C0 C0 C0 0pF 0pF 0pF 0pF 0 or pf 0 or pf 0 or pf 0 or pf 0 or pf 0 or pf 0uf, v 0uf, v 0uf, v 0uf, v 0uf, v Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Polypropylene Polypropylene Polypropylene Polypropylene Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Monolitic Aial Ceramic Aluminum Electrolytic Aluminum Electrolytic Aluminum Electrolytic Aluminum Electrolytic Aluminum Electrolytic Diodes D0 D0 D0 D0 N N N N Amp. Diode Amp. Diode. Volt Zener Diode Amp. Diode Transistors & IC's Q0 Q0 IC IC IC IC IC IC IC IC IC IC IC MPSA N OPA OPA OPA OPA OPA OPA OPA OPA OPA OPA OPA PNP transistor NPN transistor (Balanced only) (Balanced only) 00,, Marchand Electronics Inc. () 0

14 IC OPA IC OPA IC OPA (Balanced only) (Balanced only) Misc. LY DPDT DCV relay pos. connector pos. connector pos. connector For -way -channel version esistors 0 K 0K K 0K K 0K Capacitors C C C 0 or pf 0 or pf 0 or pf 00,, Marchand Electronics Inc. () 0

15 XM main circuit board SEC. SEC. F E O N SEC. T A SEC. legend HP High pass module Jumper in 'off' position LP Jumper in 'on' position 0Hz Low pass module Crossover frequency Empty module slot Custom frequency module placement 00,, Marchand Electronics Inc. () 0

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17 --- C:\Phil\designs\a_crossovers\m\mschematic.asc --- left frequency module : typical 0Hz low pass shown frequency module : typical 0Hz high pass shown frequency module : typical 00Hz low pass shown 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf k k 0.00µf 0.00µf 0.00µf k k 0.00µf 0.00µf 0.00µf ICa ICb ICa ICb ICa ICb pin numbers as shown on frequency module C 0pF K ICa C 0pF ICb... frequency module : typical 0Hz low pass shown frequency module : typical 0Hz high pass shown frequency module : typical 00Hz low pass shown 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf 0.00µf k k 0.00µf 0.00µf 0.00µf k k 0.00µf 0.00µf 0.00µf ICa ICb ICa ICb ICa ICb X X X X CHANNEL from front panel attenuator X OUT_CA OUT_XL+ OUT_XL- in in nu nu K relaya relayb X CHANNEL o to front panel attenuator right pin numbers as shown on frequency module CHANNEL from front panel attenuator X OUT_CA OUT_XL+ CHANNEL OUT_XL- in in nu nu K C 0pF K ICa relaya C0 0pF ICb relayb... X o to front panel attenuator SECTION SECTION same as section SECTION same as section SECTION same as section INPUT SECTION IN_CA IN_XL+ CHANNEL IN_XL- K K K K C pf C pf ICa ICb ICb ICa 0K K C pf K ICb ICa left IN_CA IN_XL+ K CHANNEL IN_XL- K K 0 K C pf C pf ICa ICb ICb 0 ICa 0K K C pf K ICb ICa right V+ V- D0 N C0 C0 0µF 0µF D0 N C0 C0 0µF 0µF V++ C on each 0.µF places V-- C on each places 0.µF D0 N D0 C0 N 0µF 0.K N0 Q0 0.K 0.K relay_coils_+ Q0 Na relay_coils_-

Marchand Electronics Inc.

Marchand Electronics Inc. Rochester, NY. TEL:(585) 423 0462 www.marchandelec.com Electronic Crossover XM1 XM1 ELECTRONIC CROSSOVER NETWORK In many high performance loudspeaker systems the individual loudspeaker