Tapco J-2500 Manuel D’Utilisation

•  Are both Level controls set to the same position?
•  Check your source signal to make sure the left 

and right signals are balanced. 

•  Are the speaker impedances matched? Different 

speaker loads can cause different volume levels 
on each side.

•  Try switching sides: Turn off the amp, swap the 

speaker cables at the amp, turn the amp back 
on. If the same side is still louder, the problem 
is with your speaker cabling. If the other side is 
louder now, the problem is with the mixer, the 
amp, or the line-level cabling.

•  Check the polarity of the speaker cable 

connections. You may have your positive and 
negative reversed at one end of one speaker cable.

•  Check the OL LEDs and make sure that they are 

not lighting continuously. If they are, turn down the 
signal source or the Level controls on the amp.

•  Can the amp breathe? The amplifier draws 

its ventilation air in from the back. It needs 
plenty of fresh air to stay cool. 

•  It’s going to rain. Get inside quickly. Bring the 

amplifier with you.

•  Is it loud and distorted? Turn down the signal 

coming from the mixer or signal source.

•  Is the input connector plugged completely 

into the jack? Check the speaker connections 
and verify that all connections are tight and 
that there are no stray strands of wire shorting 
across the speaker terminals.

•  If possible, listen to the signal source with 

headphones plugged into the console. If it 
sounds bad there, the problem is not in the 
amplifier.

Details concerning Warranty Service are spelled 

out in the Warranty section on page 19.

If you think your amplifier has a problem, please 

do everything you can to confirm it before calling 
for service. Doing so might save you from the 
deprivation of your amplifier and the associated 
suffering.

These may sound obvious to you, but here are 

some things you can check. Read on.

•  Our favorite question: Is it plugged in? Make sure 

the AC outlet is live (check with a tester or lamp).

•  Our next favorite question: Is the POWER switch 

on? If not, try turning it on.

•  Is the red LED next to the POWER switch 

illuminated? If not, make sure the AC outlet is 
live. If so, refer to “No Sound” below.

•  Has the BREAKER switch popped? Try pushing 

in the BREAKER switch. If it pops out again right 
away, refer to “Repair” on the next page.

•  The AC fuse inside the amplifier is blown. This is 

not a user-serviceable part. Refer to “Repair” on 
the next page to find out how to proceed.

•  Are the channel Level controls turned up? Slowly 

turn them up and see if you hear anything.

•  Is the signal source turned up? Make sure the 

signal level from the mixing console (or whatever 
device immediately precedes the amplifier) is 
high enough to produce sound in the amplifier. 
The SIG LEDs should be blinking to indicate that 
signal is present.

•  If the speakers are wired for BRIDGE mode, 

make sure the AMP MODE switch is set to 
BRIDGE.

•  If the amplifier has gotten extremely hot, the 

thermal protection circuit may have activated. 
Allow the amplifier to cool down and normal 
operation should resume.

•  Are there fuses in the speakers, or in-line fuses 

in the speaker wire? Check ‘em to see if they’re 
blown.

•  Make sure the speakers are working properly.