Extron electronics XPA U 1004 SB, User Manual

XPA U 1004 SB and XPA U 2002 SB • Operation

14

2. 

Set the source device volume to the maximum level. No sound should come out.

3. 

Raise the attenuation on the XPA Ultra Series amplifier until sound distortion occurs, 
then lower the attenuation level slowly until distortion disappears. This setting 
ensures no clipping occurs, whatever the source device volume setting is.

NOTE:

  When setting volume control through a source device, make sure the 

device’s volume is set to variable out. Consult the device’s user manual for 
detailed instructions on its calibration.

When volume is controlled at the amplifier:

1. 

If volume will be controlled at the amplifier using a remote volume control            
(see section G for details), ensure the volume on the source device is set to its 
lowest point, then adjust the attenuation of the amplifier fully counterclockwise.

2. 

Set the source device’s volume to its maximum level.

3. 

Set the remote volume control to its maximum level. No sound should come out. 

4. 

Raise the attenuation on the XPA Ultra Series amplifier until sound distortion occurs, 
then lower the attenuation level slowly until distortion disappears. This setting 
ensures no clipping occurs, whatever the source device volume setting is.

NOTE:

  When volume will be controlled at the amplifier using a remote volume 

control, make sure the source device’s audio output is set to fixed out (local 
volume control is disabled). Consult the device’s user manual for detailed 
instructions on its calibration.

100-240V --A, 50-60 Hz

1

2

CLASS 2 WIRING

0

2

4

6

8

10

14

∞

12

2

1

0

2

4

6

8

10

14

18

26

∞

12

1

2

G

G

C

V

STANDBY

SIGNAL

1

LIMITER/

PROTECT

2

ATTENUATION

OUTPUT MODE

INPUTS

REMOTE

OUTPUTS

XPA U 2002 SB

BR

BR

(

)

1 & 2

BRIDGED

MONO

70V

70V (HPF OFF)

100V

100V (HPF OFF)

STEREO

4Ω

8Ω

8Ω

1&2

16Ω

       Stereo 
Balanced Input

         Stereo 
Unbalanced Input

    Dual Mono
Balanced Input

       Dual Mono
Unbalanced Input

Stereo 8Ω or 4Ω Output Modes

100-240V --A, 50-60 Hz

1

2

CLASS 2 WIRING

0

2

4

6

8

10

14

∞

12

2

1

0

2

4

6

8

10

14

18

26

∞

12

1

2

G

G

C

V

STANDBY

SIGNAL

1

LIMITER/

PROTECT

2

ATTENUATION

OUTPUT MODE

INPUTS

REMOTE

OUTPUTS

XPA U 2002 SB

BR

BR

(

)

1 & 2

BRIDGED

MONO

70V

70V (HPF OFF)

100V

100V (HPF OFF)

STEREO

4Ω

8Ω

8Ω

1&2

16Ω

        Mono 
Balanced Input

          Mono
Unbalanced Input

Bridged Mono 8Ω/16Ω/70V/100V Modes

CH 2

CH 1

Stereo 8Ω or 4Ω 
Speaker Loads

Mono 8Ω, 16Ω, 70V,
or 100V Speaker Loads

CH 1

Sleeves

" (5 mm) MAX.

3

16

Tip

Sleeves

Tip

Ring

Use CH 1 Attenuator to 

set level for bridged 

output (CH 2 is ignored)

Set Output Mode to appropriate 

bridged mono setting (8Ω,16Ω, 

70V, 100V). Use HPF OFF only 

if HPF present in upstream DSP. 

Wire CH 1 input 

connector based on 

source as shown below

Sleeves

Tip

Ring

Tip

Ring

Sleeves

Tip

Tip

Sleeves

Tip

Ring

Sleeves

Tip

Do not tin 
the wires!

" (5 mm) MAX.

3

16

Do not tin 
the wires!

Use both CH 1 and CH 2 

Attenuators (set 

levels independently)

Set Output Mode to 

appropriate stereo 

setting (8Ω or 4Ω)

Wire CH 1 and CH 2 

input connector based 

on source as shown below

Wire output connector

to speaker loads as 

shown to the right

Wire output connector

to mono speaker load 

as shown to the right

Figure 14. 

XPA SB Configuration Based on Output Mode