DBX 296 Schematic

ECN# DATE ECN# DATEDESCRIPTIONREVISIONREVISION DESCRIPTION

A0 3.21.94RELEASE REV A TO PRODUCTION

A1 MOVED STANDOFFS TO MECHANICAL LEVEL IN BOM 3.24.9543

A2 CHANGE Q101, Q201 FROM J114 TO J111 3.24.95184

A3 DELETE 70-4130 ADD 70-4123 1325 1/22/97

A4 3/31/971381

CHANGE 44-0026 TO 44-0051, ADD 70-3025,
CHANGE 70-4131 TO 70-4124

|LINK
|056162A4.001
|056162A4.002
|056162A4.003

dbx PROFESSIONAL PRODUCTS
8760 South Sandy Parkway

Sandy, Utah 84070
Title

dbx 296 Spectral Enhancer 80-6162

Size Document Number Rev

056162A4.000 A4

B

Tuesday, October 26, 1999

Date: Sheet of

0 3

CHANNEL 1

INPUT

J100
J322110

2
5
4
1
6

3

1000PJ100M3

C114
1000PJ100M3

R132

15.8K 1% M

C115
1000PJ100M3

R133

63.4K 1% M

+15V

LM339D

8

IC4C

9

12

-15V

R100

49.9K 1% M

C100
1000PJ100M3

R101

49.9K 1% M

C101

9

10

9.76K 1% M

VR102
50K402081

HISS REDUCTION

IC5C

2120A

1
9

R145

1.5M M

+15V

10

14

11

VR100
20K402083

TL074D

IC1C

3

2

-15V

LM339D

IC4D

R134

R102

49.9K 1% M

6
5

R103

49.9K 1% M

8

-15V

C117
10K35T1

13

IC1B

11

TL074D

-15V

C116
.0033J63F1

3

63.4K 1% M

2

1

1.00K 1% M

R139

3

1

R140

2

7

R182

34.0K 1% M

R106

49.9K 1% M

47PJ100M3

12.4K 1% M

CR100

1N4148

R141

39.2K 1% M

13
12

C102

R104

200 1% M

R137

143 1% M

IC2D

TL074D

R105
47 M

R135

3
2

R107

49.9K 1% M

14

WA100
WA283345

1

2

+15V

4

TL074D

1.00K 1% M

R136
845 1% M

R138
750 1% M

R142

2.67K 1% M

CR101
1N4148

R109

24.9K 1% M
1

IC1A

.0022J50F1

R144

TL074D

WA101
WA283345

1

R112

24.9K 1% M

2

R113
47 M

C104

10S63E1

R143

20.5K 1% M

C129
.1MD3

+15V

2

IC2A

3

R108

12.4K 1% M

R110

8.25K 1% M

13

IC1D

12

TL074D

C105

4

1

.01J63F1

14

R114
200 1% M

J2-6

J2-6

R153

4.12K 1% M

R164

7.50K 1% M

C122

.01J63F1

R165

71.5K 1% M

R111

24.9K 1% M

30.9K 1% M

C123

-15V

150K M

SSM2120

+15V

THUMPNULL
TRIM

VR104
OMIT

R185

OMIT

8

21

R115

C118

1000PJ100M3

R146

39.2K 1% M

-15V

IC5A

6

7

+15V

2
3

50K

123

+15V

10

5

R154

28.7K 1% M

R155
200 1% M

+15V

4

IC3A

+15V

R149

150K M

11
4

-15V

TL074D

C106
470PJ100D1

1

IC2B
TL074D

6
5

11

-15V

442K 1% M

931K 1% M

6

IC3B

5

-15V

C119
.0022J50F1

LM339D

7

IC4B

6

C125

.01J63F1

R117

R173

TL074D

11

CR106
1N4148

R148
47 M

7

7

TL074D

1

-15V

R147

35.7K 1% M

16

R156

14.3K 1% M

8

IC3C

R166
910 M

Q100
2N4400

C124
.01J63F1

R167
100 M

R116
665K 1% M

C107

.01J63F1

C108

.01J63F1

18

IC5B

22

17

9
10

R172
1M M

19

1

7.15K 1% M

SSM2120

20

R118

165K 1% M

R120

453K 1% M

R123
453K 1% M

R125

CR102
1N4148

R157

10M

CR105
LEDG702100

C126
.047J63F1

TL074D

13

IC3D

12

R169
10M

R168
470K M

3

Q101
J111

2

12
13

C120
10PJ100M3

R150

10

-15V

14

-15V

C109

.01J63F1

C110
.0033J63F1

R119

57.6K 1% M

TL074D

R124

10.0K 1% M

35.7K 1% M

TL074D

9

IC2C

R158

71.5K 1% M

CR103
1N4148

CR104

1N4148

C127
1K35T1

R170

2.49K 1% M

R171
100K 1% M

IC17D

J2-5

J2-5
J2-6

J2-6

C103
47PJ100M3

R128

22.6K 1% M

+15V

6
5

+15V

7
8
9

CHANNEL 1
OUTPUTINPUT GAIN

J101
J322110

2
5
4
1
6

R129
47 M

8

IC18B
NE5532

R183

3.0K M

7

J2
1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16

RC380217

3

J2-5

J2-5

1 3

C113

1

1000PJ100M3

S100A
SW440051

S100B
SW440051

R121
442K 1% M

9

8

10

IC17C

TL074D

R126
604 1% M

VR101

50K402081

14

L.F. DETAIL

C130
.047J63F1

R151

3.24K 1% M

8

+15V

3

2

IC4A
LM339D

R162

31.6K 1% M

R159

30.9K 1% M

2
3

BYPASS

R122

1.69K 1% M

1

2

3

3.24K 1% M

22.6K 1% M

4
5

dbx PROFESSIONAL PRODUCTS
8760 South Sandy Parkway

Sandy, Utah 84070
Title

Size Document Number Rev

B

Date: Sheet of

C112

4

1000PJ100M3

5
6

R184

22.6K 1% M
C111

22NPS25E1

R127

R130

R131

4.53K 1% M

123

VR103
20K402083

HF DETAIL

R152

2.00K 1% M

C121
330PMD1

R160

45.3K 1% M

R161

2.00K 1% M

-15V

dbx 296 Spectral Enhancer (CH 1) 80-6162

056162A4.001 A4

BYPASS

S100C
SW440051

R163

4.7M

+15V

-15V

J2-4

J2-9

J2-10
J2-11
J2-12

Tuesday, October 26, 1999

CHANNEL 2

INPUT 2

J200
J322110

2
5
4
1
6

3

1000PJ100M3

C214
1000PJ100M3

R232

15.8K 1% M

C215
1000PJ100M3

R233

63.4K 1% M

R245

1.5M M

IC12C

+15V +15V

LM339D

8

14

9

12

-15V

INPUT GAIN

VR200
20K402083

R200

49.9K 1% M

C200
1000PJ100M3

R201

49.9K 1% M

C201

TL074D

9

IC9C

10

9.76K 1% M

VR202
50K402081

HISS REDUCTION

1
9

U13C

2

-15V

10
11

R234

3

2120A

IC12D

LM339D

R202

49.9K 1% M

R203

49.9K 1% M

8

13

6
5

-15V

-15V

C217
10K35T1

3

1

IC9B

11

TL074D

C216
.0033J63F1

3

63.4K 1% M

2

1

R239

2

7

R282

34.0K 1% M

R206

49.9K 1% M

47PJ100M3

12.4K 1% M

CR200

1N4148

13
12

R205

47 M

+15V

4

3

IC9A

2

C202

R204

R235
200 1% M

R237

143 1% M

R241

39.2K 1% M R242

R240

1.00K 1% M

IC10D

TL074D

R207

49.9K 1% M

14

WA200
WA283345

1

2

TL074D

1.00K 1% M

2.67K 1% M

R209

24.9K 1% M
1

.0022J50F1

R236
845 1% M

R238
750 1% M

CR201
1N4148

R212

24.9K 1% M

R244

TL074D

WA201
WA283345

1

2

C204

10S63E1

R243

20.5K 1% M

C229
.1MD3

+15V

2
3

R208

12.4K 1% M

R210

8.25K 1% M

13

IC9D

12

TL074D

C205

4

IC10A

R213
47 M

C203
47PJ100M3

R228

22.6K 1% M

2
3

-15V

+15V

7
8
9

CHANNEL 2
OUTPUT

2
5
4
1
6

R229
47 M

IC18A

NE5532

4

R283

3.0K M

J201
J322110

1

3

J2-9

J2-12
J2-11

2 3

C213

1

1000PJ100M3

S200A

R221

442K 1% M

+15V

2
3

R226
604 1% M

VR201
50K402081

L.F. DETAIL

C230

.047J63F1

R251

3.24K 1% M

2

IC12A
LM339D

R259

30.9K 1% M

4

SW440051

BYPASS

S200B

SW440051

IC17A
TL074D

+15V

1

3

THUMPNULL
TRIM

VR204
OMIT

50K

123

-15V

R285
OMIT

150K M

14

R211

24.9K 1% M

IC13A
SSM2120

+15V

R215

30.9K 1% M

R214
200 1% M

J2-10

R253

4.12K 1% M

1

R264

7.50K 1% M

C222

.01J63F1

C223

.01J63F1

R265

71.5K 1% M

+15V

6

8

21

7

-15V

1000PJ100M3

39.2K 1% M

+15V

+15V

R249

150K M

10

11
4

5

-15V

C218

R246

R254

28.7K 1% M

R255
200 1% M

+15V

2
3

C206
470PJ100D1

4

IC11A

TL074D

6
5

-15V

.0022J50F1

1

IC10B
TL074D

11

442K 1% M

931K 1% M

6
5

-15V

IC12B

LM339D
7

6

C225

.01J63F1

R217

R273

7

11

R248
47 M

C219

CR206
1N4148

7

R256

14.3K 1% M

IC11C
TL074D

8

1

-15V

R216
665K 1% M

IC11B
TL074D

R247

35.7K 1% M

16

R266
910 M

Q200
2N4400

C207

.01J63F1

C208

.01J63F1

18

17

9
10

C224
.01J63F1

R267
100 M

22

R272
1M M

20

19

IC13B
SSM2120

R218

165K 1% M

R219

57.6K 1% M
R220

453K 1% M

R223
453K 1% M

CR205
LEDG702100

1

CR202
1N4148

C226
.047J63F1

13
12

3

2

R257

10M

Q201
J111

R268
470K M

5
6

C220
10PJ100M3

R250

35.7K 1% M

-15V

IC11D
TL074D

R269
10M

C209

.01J63F1

C210

.0033J63F1

IC17B

TL074D

11

-15V

R225

7.15K 1% M

9

10

R258

71.5K 1% M

CR203
1N4148

C227
1K35T1

14

-15V

7

R224

10.0K 1% M

IC10C

TL074D

CR204
1N4148

R270

2.49K 1% M

R271
100K 1% M

8

2
3

C212

4

1000PJ100M3

5
6

R222

1.69K 1% M

R284

22.6K 1% M
C211

1

3

22.6K 1% M

4
5

dbx PROFESSIONAL PRODUCTS
8760 South Sandy Parkway

Sandy, Utah 84070
Title

Size Document Number Rev

B

Date: Sheet of

22NPS25E1

2

R227

3.24K 1% M

R230

R231

4.53K 1% M

123

VR203

20K402083

HF DETAIL

R252

2.00K 1% M

C221
330PMD1

R260

45.3K 1% M

R261

2.00K 1% M

R263

4.7M

-15V

R262

31.6K 1% M

S200C

SW440051

BYPASS

dbx 296 Spectral Enhancer (CH 2) 80-6162

056162A4.002 A4

Tuesday, October 26, 1999