marchand electronics inc.the frequency modules plug into 10-position card-edge connectors on the...

Marchand Electronics Inc.

Tel:(585) 423 0462 [email protected] www.marchandelec.com

(c)2016 Marchand Electronics Inc.

XM44 Universal electronic crossoverAvailable 1-, 2-, 3- or 4-way.

January 2017

©2016 Marchand Electronics Inc. (585) 423 0462 www.marchandelec.com 1

Features

.

.

XLR Balanced inputs (optional) Balanced inputs for high noise immunityRCA inputs Standard line level inputsXLR Balanced outputs (optional) Balanced inputs for high noise immunityRCA outputs Standard line level inputsLevel attenuators 12 position attenuators standard

24 position attenuators optionalFuse 1Amp115/230VAC switch Worldwide AC power compatibilityPower entry connector Standard line cord for 120V AC operation.

Specifications.

Frequency response: DC - 20KHz +/- 1 dBHarmonic Distortion @ 1KHz 0.01% or betterMax input voltage 4VRMS Voltage gain (RCA outputs) 0dB(1X) with attenuator in center position (XLR outputs) 6dB(2X) with attenuator in center positionCommon mode rejection (XLR) Better than 70dBInput impedance (RCA, XLR) 100KOhm, 25KOhm Power requirement 120VAC/240 VAC, 1A fuseConstruction All metal cabinet, black with white legendDimensions: 17” x3.5” x 11” (WxHxD)Weight: 12 lbs

Front panel shows 3-way crossover

Rear panel shows 2-way crossover


Frequency modules

The crossover points of the XM44 are set using plug-infrequency modules. The frequency modules plug into 10-position card-edge connectors on the main circuit board.There are two main types of frequency modules: highpass modules and low-pass modules. Each of thesefrequency modules are available in any frequency andwith slopes of 6,12,18 and 24 dB/octave. Specialtymodules are available for implementing special functions,like notch filters or delays.

Typical frequency module.

Each channel of the XM44 has 3 module slots. Thesecan take any kind of module. The slots are markedP1,P2 and P3. Slot P1 and P2 are optional. If no module

is inserted the enable jumper on that slot needs to be setto off. If a module is used in that slot the enable jumperon that slot needs to be set to on. Typically, the low passsection (section 4) will only have a low-pass module inP3. The high pass section (section 1) will only have ahigh-pass module in P3. In a 3-way crossover the midsection (sec 2) will have a low pass module in P2 and ahigh-pass module in P3. Note the setting of the jumper.See figure below and on next page for examples.Notch filters and delays are implemented with modules inP1 and P2.

XM44 main circuit board (only one section shown )

F

R

O

N

T

R

E

A

R

LEFT

RIGHT

SEC. 4

x

P1

x

P2

100Hz LP

P3

x

P1

x

P2

100Hz LP

P3

legend

Jumper in 'off' position

Jumper in 'on' position

HP High pass module

LP Low pass module

100Hz Crossover frequency

x Empty module slot



XM44 main circuit board

LEFT

RIGHT

SEC. 4

x

P1

F

R

O

N

T

Typical 2-way crossover with 100Hz crossover point

R

E

A

R

x

P2

100Hz LP

P3

x

P1

x

P2

100Hz LP

P3

LEFT

RIGHT

SEC. 3

x

P1

x

P2

x

P3

x

P1

x

P2

x

P3

LEFT

RIGHT

SEC. 2

x

P1

x

P2

x

P3

x

P1

x

P2

x

P3

LEFT

RIGHT

SEC. 1

x

P1

x

P2

100Hz HP

P3

x

P1

x

P2

100Hz HP

P3

legend



HP High pass module

LP Low pass module


x Empty module slot


LEFT

RIGHT

SEC. 4

x

P1

F

R

O

N

T

Typical 4-way crossover with 100Hz, 2000Hz and 7000Hz crossover point

R

E

A

R

x

P2

100Hz LP

P3

x

P1

x

P2

100Hz LP

P3

LEFT

RIGHT

SEC. 3

x

P1

100Hz HP

P2

2000Hz LP

P3

x

P1

100Hz HP

P2

2000Hz LP

P3

LEFT

RIGHT

SEC. 2

x

P1

2000Hz HP

P2

7000Hz LP

P3

x

P1

2000Hz HP

P2

7000Hz LP

P3

LEFT

RIGHT

SEC. 1

x

P1

x

P2

7000Hz HP

P3

x

P1

x

P2

7000Hz HP

P3

legend



HP High pass module

LP Low pass module


x Empty module slot


LEFT

RIGHT

SEC. 4

x

P1

F

R

O

N

T

3-way crossover with 100Hz and 2000Hz crossover point and notch filter on mid

R

E

A

R

x

P2

100Hz LP

P3

x

P1

x

P2

100Hz LP

P3

LEFT

RIGHT

SEC. 3

450Hz Notch

P1

100Hz HP

P2

2000Hz LP

P3

450Hz Notch

P1

100Hz HP

P2

2000Hz LP

P3

LEFT

RIGHT

SEC. 2

x

P1

x

P2

x

P3

x

P1

x

P2

x

P3

LEFT

RIGHT

SEC. 1

x

P1

x

P2

2000Hz HP

P3

x

P1

x

P2

2000Hz HP

P3

legend



HP High pass module

LP Low pass module

Notch Notch filter

x Empty module slot


LEFT

RIGHT

SEC. 4

x

P1

F

R

O

N

T

Typical 3-way crossover with 100Hz and 2000Hz crossover point

R

E

A

R

x

P2

100Hz LP

P3

x

P1

x

P2

100Hz LP

P3

LEFT

RIGHT

SEC. 3

x

P1

100Hz HP

P2

2000Hz LP

P3

x

P1

100Hz HP

P2

2000Hz LP

P3

LEFT

RIGHT

SEC. 2

x

P1

x

P2

x

P3

x

P1

x

P2

x

P3

LEFT

RIGHT

SEC. 1

x

P1

x

P2

2000Hz HP

P3

x

P1

x

P2

2000Hz HP

P3

legend



HP High pass module

LP Low pass module


x Empty module slot

Location High Pass Typical Value for 1000Hz

Low Pass Typical Value for 1000Hz

1 C1 3300pF R1 34.0K

2 R2 68.1K C2 3300pF

3 R3 68.1K C3 3300pF

4 C4 3300pF R4 34.0K

5 R5 68.1K C5 3300pF

6 C6 3300pF R6 34.0K

7 R7 68.1K C7 3300pF

8 R8 68.1K C8 3300pF

9 C9 3300pF R9 34.0K

10 R10 68.1K C10 3300pF

Table 1 component selection for frequency module for standard 24dB/oct,Constant Voltage (Linkwitz-Riley) alignment.




1 J1 Jumper Wire J1 Jumper Wire

2 not used not used

3 not used not used

4 C4 3300pF R4 47.5K

5 R5 47.5K C5 3300pF

6 C6 3300pF R6 23.7K

7 R7 47.5K C7 3300pF+3300pF

8 R8 47.5K C8 3300pF+3300pF

9 C9 3300pF R9 23.7K

10 R10 95.3K C10 3300pF

Table 2 component selection for frequency module for 18dB/oct, Butterworth




2 not used not used

3 not used not used


5 not used not used

6 C6 3300pF R6 34.0K

7 R7 68.1K C7 3300pF

8 R8 68.1K C8 3300pF

9 C9 3300pF R9 34.0K

10 R10 68.1K C10 3300pF

Table 3 component selection for frequency module for 12dB/oct, Butterworth




2 not used not used

3 not used not used

4 C4 3300pF R4 47.5K

5 R5 47.5K C5 3300pF


7 not used not used

8 not used not used

9 C9 3300pF R9 47.5K

10 R10 47.5K C10 3300pF

Table 4 component selection for frequency module for 12 dB/oct,

Constant Voltage (Linkwitz-Riley) alignment.


Location High Pass Typical Valuefor 1000Hz

Low Pass Typical Value for1000Hz


2 not used not used

3 not used not used

4 C4 3300pF R4 47.5K

5 R5 47.5K C5 3300pF


7 not used not used

8 not used not used


10 not used not used

Table 5 component selection for frequency module for 6 dB/oct



1 C1 3300pF R1 73.2K

2 R2 44.2K C2 3300pF

3 R3 Not used C3 3300pF

4 C4 3300pF R4 15.8K

5 R5 52K3 C5 3300pF

6 C6 3300pF R6 21.5K

7 R7 18.7K C7 22000pF (0.022uF)

8 R8 Not used C8 1000pF

9 C9 3300pF R9 15.4K

10 R10 127K C10 3300pF

Table 6 component selection for frequency module for standard 48dB/oct,Constant Voltage (Linkwitz-Riley) alignment.

IMPORTANT NOTE: TWO of these modules are required for each channel


Module for baffle step compensation (1.0KHz = 4.8")

Location Typical Valuefor 1000Hz

1 R1 22K

2 not used

3 not used

4 jumper

5 not used

6 not used

7 not used

8 not used

9 not used

10 not used

11 C11 3300pF

12 R12 39K

Table 7 component selection for notch filter

Cut is 4dB above 1KHz.For different frequency, scale all capacitors inversely with frequency.For example, C11=(1000/F)*3300pF; where if is new frequency.

. ..Spice simulator by Linear Technology www.linear.com


XM44 frequency moduleModification for notch filter

R12

C11

Rear of XM44

Jumper

Module for ribbon frequency response correction (18 KHz peaking)


1 R1 5.75K

2 C2 3300pF

3 C3 3300pF

4 R4 5.75K

5 C5 330pF

6 jumper

7 not used

8 not used

9 jumper

10 not used


Peaking is 7dB at 18KHz.For different frequency, scale all capacitors inversely with frequency.For example, C2=C3=(1000/F)*3300pF, C5=(1000/F)*330pF; where if is new frequency.

. ..Spice simulator by Linear Technology www.linear.com



Rear of XM44

Module for notch filter


1 not used

2 not used

3 R3 4.99K

4 C4 3300pF

5 R5 475K

6 not used

7 not used

8 not used

9 not used

10 not used

11 R11 10K

12 C12 3300pF


For different frequency, scale all capacitors inversely with frequency.For example, C4=C12=(1000/F)*3300pF; where if is new frequency

Spice simulator by Linear Technology www.linear.com



R11

C12

Rear of XM44

Module for Bass boost (Linkwitz transformer)Refer to Excel spreadsheet www.trueaudio.com/downloads/linkxfrm.xls

XM44BC Spreadsheetreference

Component value Typical value for f(0)=100Hz, F(p)=50Hz,Q(0)=0.707, Q(p)=0.707

R1 not used

R2 not used

R3 not used

R4 not used

R5 R1 37K

R6 R1 37K

R7 R2 150K

R8 R2 150K

R9 R3 150K

R10 R3 150K

R11 Jumper

R12 Jumper

C1 not used

C2 not used

C3 C1 0.18 uF

C4 C2 0.10 uF

C5 C2 0.10 uF

C6 C3 0.045 uF


Module for Attenuation (flat frequency response)Use blank circuit board XM44UAF

XM44UAF Component value

R1 1K00

R2 not used

R3 not used

R4 not used

R5 not used

R6 not used

R7 not used

R8 not used

R9 not used

R10 not used

R11 see table---->

R12 10K0

R13 not used

R14 1K00

R15 1K00

C1 not used

C2 not used

Attenuation Value R11

6 dB 10K0

10 dB 21K6

12 dB 29K4

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 next to module is in ON position


Install in P1 or P2 slot on main

circuit board.

Be sure to set jumper in ON

position. Facing rear of XM44

crossover

XM44 main circuit board parts list

Resistors

R1 nu

R2 nu *** ( 24K9 last section only)

R3 24K9 1%, 1/4W, Metal Film


R5 49.9 Ohm 1%, 1/4W, Metal Film





R10 nu

R11 nu*** ( 24K9 last section only)














R107 100K 1%, 1/4W, Metal Film








































Capacitors

C1 0.1uF Monolitic Axial Ceramic
















C17 100pF Polypropylene

















C113 20 or 22pF Silver Mica






C201 330uf, 25v Aluminum Electrolytic





Diodes

D201 1N4937 1 Amp. Diode


D203 1N5232 5.6 Volt Zener Diode


D205 1N4728 3.3 Volt Zener Diode

D206 Red LED

D207 Red LED

Transistors & IC's

Q201 MPSA92 PNP transistor

Q202 2N2222 NPN transistor

IC1 OPA2134 op-amp

IC2 OPA2134 op-amp

IC3 OPA2134 op-amp

IC4 OPA2134 op-amp

IC5 OPA2134 op-amp

IC6 OPA2134 op-amp

IC7 OPA2134 op-amp

IC8 OPA2134 op-amp

IC101 OPA2134 op-amp

IC102 OPA2134 op-amp (Balanced only)


IC104 OPA2134 op-amp




Misc.

RLY1 DPDT 24DCV relay

P1 10pos. connector

P2 10pos. connector

P3 10pos. connector

For 3-way 3-channel version

Resistors


















Capacitors







LEFT

RIGHT

SEC. 4

P1

F

R

O

N

T

Custom frequency module placement

R

E

A

R

P2 P3

P1 P2 P3

LEFT

RIGHT

SEC. 3

P1 P2 P3

P1 P2 P3

LEFT

RIGHT

SEC. 2

P1 P2 P3

P1 P2 P3

LEFT

RIGHT

SEC. 1

P1 P2 P3

P1 P2 P3

legend



HP High pass module

LP Low pass module


x Empty module slot

R13

16K5

1

340k

2

0.0033µf

IC8a

R15

49.9

R14

49.9

R17

10K0

IC8b R18

49.9

R16

10K0

3

0.0033µf

4

340k

5

0.0033µf

IC5a

6

340k

7

0.0033µf

8

0.0033µf

9

340k

10

0.0033µf

IC5b

2

340k

4

0.0033µf

IC6a

6

340k

7

0.0033µf

8

0.0033µf

9

340k

10

0.0033µf

IC6b

1

34k

2

0.0033µf

3

0.0033µf

4

34k

5

0.0033µf

IC7a

6

34k

7

0.0033µf

8

0.0033µf

9

34k

10

0.0033µf

IC7b

1

0.0033µf

3

340k

5340k

X6X8

X12

X14

R12

24K9

R11

nu

R10

nu

C19

100pF

C20

100pF

R4

16K5

1

340k

2

0.0033µf

IC4a

R6

49.9

R5

49.9

R8

10K0

IC4b R9

49.9

R7

10K0

3

0.0033µf

4

340k

5

0.0033µf

IC1a

6

340k

7

0.0033µf

8

0.0033µf

9

340k

10

0.0033µf

IC1b

2

340k

4

0.0033µf

IC2a

6

340k

7

0.0033µf

8

0.0033µf

9

340k

10

0.0033µf

IC2b

1

34k

2

0.0033µf

3

0.0033µf

4

34k

5

0.0033µf

IC3a

6

34k

7

0.0033µf

8

0.0033µf

9

34k

10

0.0033µf

IC3b

1

0.0033µf

3

340k

5340k

X3X5

X9X1

1

R3

24K9

R2

nu

R1

nu

C17

100pF

C18

100pF

IC103a

R117

24K9

R119

3K24

C114

22pF

R111

4K99

IC102b

R112

4K99

IC103b

R118

24K9

R120

3K24

C115

22pF

D201

1N4937

D202

1N4937

Cx

0.1µF

C202

330µF

C201

330µF

Cx

0.1µF

C204

330µF

C203

330µF

Q2012N5087

R20213.3K

R20313.3K

R2013.24K

D204

1N4937

D203

1N5232C205

330µF

Q2022N2222a

R115

4K99

R116

4K99

R113

4K99

R114

4K99

R109

4K99

IC102a

R108

4K99

R110

4K99

IC101b

R107

100K

R106

4K99

C113

22pF

R104

10K

R105

4K99

R101

4K99

IC101a

R103

4K99

R102

4K99

IC106a

R137

24K9

R139

3K24

C117

22pF

R131

4K99

IC105b

R132

4K99

IC106b

R138

24K9

R140

3K24

C118

22pF

Rx135

4K99

Rx136

4K99

R133

4K99

R134

4K99

R129

4K99

IC105a

R128

4K99

R130

4K99

IC104b

R127

100K

R126

4K99

C116

22pF

R124

10K

R125

4K99

R121

4K99

IC104a

R123

4K99

R122

4K99

OUT_XLR+

right

OUT_RCA

OUT_XLR-

in1

in2

o

x

relay2a relay2b

OUT_XLR+

left

OUT_RCA

OUT_XLR-

in1

in2

o

x

relay1a relay1b

IN_RCA

IN_XLR+

IN_XLR-

V++

V--

V+

V-

relay_coils_-

relay_coils_+

IN_RCA

IN_XLR+

IN_XLR-

frequency module : typical 100Hz low pass shownfrequency module : typical 100Hz high pass shown frequency module : typical 1000Hz low pass shown

to front panel attenuator

from front panel attenuator

1

2

34 5 67

8

9 10

pin numbers as shown on frequency module

frequency module : typical 100Hz low pass shownfrequency module : typical 100Hz high pass shown frequency module : typical 1000Hz low pass shown

to front panel attenuator

from front panel attenuator

1

2

34 5 67

8

9 10

pin numbers as shown on frequency module

LEFT CHANNEL

LEFT CHANNEL

RIGHT CHANNEL

RIGHT CHANNEL

SECTION 4

SECTION 3 same as section 4



P1 P2 P3

P3P2P1

LEFT CHANNEL

left

RIGHT CHANNEL

right

INPUT SECTION

on each op-amp

on each op-amp

36 places

36 places

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marchand electronics inc.the frequency modules plug into 10-position card-edge connectors on the...

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