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20 

4  Troubleshooting 

 

Problem: Power indicator does not turn on. 
 
Procedure: 

Check that the amplifier is plugged into a live outlet. After 

you have ensured that it is not a power issue, disconnect any speakers. 
If the amplifier turns on after a few seconds delay, then the problem is 
in the output connection. Check wiring and speakers for short circuits.   
 
 

Problem: No output on one or both channels; Power indicator is 
lit. 
 
Procedure: 

Check that level controls are  not turned down. Check that 

input and output connections are secure. Ensure signal present LED is 
flashing to denote a signal. If there is no signal detected check signal 
source and that level controls are set high enough. 
 
 

Problem

Amplifier overheats and/or shuts off.

 

 

Procedure: 

Review 

Section 2.3

 on proper cooling procedures. Check 

the signal lights on the rear of the amplifier to see if the signal is over-
driving (the signal light flashes red frequently). Overdriving the amplifier 
for extended periods of time can cause a thermal shutdown. 
 
 

Problem: Output sound is distorted or cracking. 
 
Procedure: 

Check all cables for damage or loose connections and re-

duce the gain on the input signal at the mixer or preamp level. Replace 
the cables and loudspeakers temporarily to see if this resolves the 
problem. If problem still exists, contact your Authorized Dealer for ser-
vice. 

 

 

21 

5 Technical  Specifications

 

Output Power 30Hz - 20kHz 

 

DSP100-1 

100W x 1 @ 70.7/100V 

DSP100-2 

100W x 2 @ 70.7/100V 

Frequency Response (+0, -3 dB) 

100Hz-20kHz  

THD+N (@ full output power) 

<0.1% 

Signal to Noise Ratio 

>100dB 

Input Sensitivity 

1V (0 dBV) 

Input Impedance (Balanced/
Unbalanced) 

7.2k

 

/ 3.60k

 

External Mute 

Contact closure 

Power Consumption: Idle; 1/8 Draw 

TBD 

Amplifier Class 

Remote Volume 

0-10V 

Input Connectors 

RJ45, 3.5mm terminal block, 
dual RCA stereo 

Output Connectors 

5mm terminal block  

Dante Network Connector 

RJ-45 

LED Indicators 

Power, Standby, Signal, Clip 

Controls 

USB, RVC 

Power Supply 

Internal 110/240VAC 50-60Hz 

Cooling 

Convection-Cooling 

Construction 

Aluminum Chassis 

Mounting 

Rack-mounted 

Dimensions (height, width, length) 

1.75” x 8.4” x 10.7” 

Weight 

4.5 lbs max (varies by model) 

Stewart Audio reserves the rate to change features and specifications without notice.  

Summary of Contents for DSP100 series

Page 1: ...Owner s Manual DSP100 Series www stewartaudio com October 2014 DSP100 2 POWER STANDBY SIGNAL 1 CLIP 1 SIGNAL 2 CLIP 2 DSP100 1 POWER STANDBY SIGNAL CLIP ...

Page 2: ... interfere with its proper ventilation For example the amplifier must not be placed on a rug bed sofa or similar surface that impedes airflow across the chassis Airflow through the ventilation openings should be unobstructed 4 This amplifier should not be used near water for example near a bathtub in a wet basement near a swimming pool etc This amplifier is intended to be operated in a controlled ...

Page 3: ...ack of this manual 1 1 Features The DSP100 Series of amplifiers are half rack commercial amplifiers offering 100W of power per channel with integrated DSP This unique combination of power and features allows these amplifiers to be tai lored to the zone application room acoustics and speakers saving time and budget Your Stewart Audio DSP100 Series amplifier is the result of years of experience in t...

Page 4: ...hing these to the rack will depend on the type of rack you are using 2 2 2 Dual Rack Mount Kit Part Number RMK HLF D Refer to the figure on the following page when assembling the dual rack mount brackets onto the FLX amplifier Step 1 Note the position of the captive nuts on the inner brackets One set must be near the front of one amplifier and the other set near the rear of one amplifier Step 2 At...

Page 5: ...nnector for balanced differential inputs Note carefully the polarity symbols on the rear of the unit and that the two balanced inputs share a common ground connection Two RCA jacks are also provided for unbalanced single ended inputs See the next three sections for instructions on connecting your amplifier to its input source 2 4 1 Balanced Differential Connections When using a balanced input sour...

Page 6: ...s are held securely in place Inspect for possible shorts or broken wires Distance Wire Gauge Up to 500ft 22 AWG 500 1000 ft 20 AWG Over 1000ft 18 AWG Output Connector 70V 100V Step down transformer 11 Note Class 2 wiring must be used on the speaker termi nals to comply with UL requirements CAUTION Do not connect either speaker terminal to ground This will cause a short circuit which may dam age th...

Page 7: ... No local Outputs 1 2 1 2 No Network Inputs Outputs 0 0 2 0 3 Operation 3 1 Operating Precautions 1 Before use your amplifier must be configured for proper operation including input and output wiring hookup Improper wiring can re sult in damage to equipment or potentially harm to the operator Consult Section 2 for setup instructions 2 Tampering with the circuitry or making unauthorized changes is ...

Page 8: ...e when an audio signal is present and when that signal is being clipped The DSP100 2 models have an additional signal present LED indicator and an additional clip LED indicator for the second input channel 3 3 2 Controls DSP100 Series amplifiers have an integrated digital signal processor DSP providing considerable control of the audio signals A set of DSP functions is available for each signal pa...

Page 9: ... Pregain DANTE INPUT 1 DANTE INPUT 2 17 3 4 Dante Your network enabled DSP100 Series amplifier can act as a network break in box as well as an amplifier with local inputs and outputs Au dio signal routing and configuration is done using the Dante Controller software from Audinate at www audinate com Select Dante Controller under the Products section This will require registration for Audinate s po...

Page 10: ... routed an audio signal to network input 1 of the FLX amplifier using the Dante Control Center software but hear no output from the amplifi er A Check the settings in the matrix mixer using the DSP Control Cen ter software to be certain that network 1 is routed to a local output 19 3 5 Remote Volume Control DSP100 Series amplifier volume can be remotely controlled or muted via the input on the rea...

Page 11: ...wn Problem Output sound is distorted or cracking Procedure Check all cables for damage or loose connections and re duce the gain on the input signal at the mixer or preamp level Replace the cables and loudspeakers temporarily to see if this resolves the problem If problem still exists contact your Authorized Dealer for ser vice 21 5Technical Specifications Output Power 30Hz 20kHz DSP100 1 100W x 1...

Page 12: ... the return procedures which must be followed in order to prevent processing delay or cost to the customer Please read the entire section before contacting Stewart Audio for returns 23 6 2 1 Return Authorization Number All returns to the factory for service must be accompanied by a Return Authorization RA number One can be obtained by contacting Stewart Audio at 209 588 8111 or via e mail at suppo...

Page 13: ...l An estimate for all non warranty repairs will be provided to the custom er once the unit has been shipped to the factory The customer is re sponsible to approve this estimate within 7 days If the repairs are not approved within 14 days Stewart Audio reserves the right to consider the unit scrap and may discard it 6 2 5 Payment of Non Warranty Repairs Payment for non warranty repairs must be subm...

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