Pulse APB Series Quick Start Manual page 4

If the internal protection circuitry detects a fault in the speakers or amp, the channel(s) will enter Protect Mode and red
"PROTECT" LEDs will illuminate on the front panel to show this. Switch the amplifier off and check the entire system
(including leads) before powering up again. If still in Protect Mode, seek advice from qualified service personnel.
Before powering down, turn the channel gain controls fully down to avoid loud noises when switching off.
Specifications
Model
Power supply
Controls
Input impedance
Frequency response
Total harmonic distortion
S/N ratio
Protection
Output: RMS @ 2Ω
Output: RMS @ 4Ω
Output: RMS @ 8Ω
Bridge power: RMS @ 4Ω
Bridge power: RMS @ 8Ω
Circuit protection
Dimensions
Weight
Troubleshooting
No power light on either channel
Power lights on but no other LEDs and no
output
Power light and Signal LEDs are lit but no
output
PROTECT LED is lit and there is no output
Output is very distorted and "CLIP" LEDs
are lighting
Output is working but at very low level
APB1400
230Vac, 50Hz (IEC)
CH1 gain, CH2 gain, ground, compress, mode
20k ohms
5Hz - 50kHz
0.05%
>105dB
Short-circuit, overload, D.C. and thermal protect
2 x 1000W
2 x 700W
2 x 400W
1700W
1250W
Short-circuit, DC, Overload, Boot-strap short test
88 x 482 x 453mm
22.5kg
Ensure IEC inlet is connected to mains and lead is in good condition
Ensure mains outlet is switched on
Check input signal and connection leads
Ensure channel gain controls are not turned fully down
Check speaker cabinets are in good working order
Check speaker leads are in good condition and connected properly
Switch off and disconnect from mains
Check speakers are in good working order and not shorted out (using a multi-tester)
After checking all connected items, power up again
If still in Protect Mode, switch off again and refer to qualified service personnel
Ensure cooling vents are clear and amplifier is not overheated
Check the speaker impedance is not below 2Ω per channel (4Ω if bridged)
Turn down the input level from audio source
Turn down channel gain controls
Ensure input source is at line level
Increase input level from audio source
Turn up channel gain controls
APB2100
2 x 1400W
2 x 1050W
2 x 600W
2300W
1750W
25.0kg
www.pulse-audio.co.uk
APB2700
2 x 1800W
2 x 1350W
2 x 800W
2900W
2300W
26.0kg
Errors and omissions excepted.
Copyright© 2014. Pulse
| APB Series User Manual