Question about Niles SI-1260 12-Channel Amplifier

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No output from Niles amp SI-1230. Power light on on, but neither the active nor protect lights are on. Fuses appear to be good. Suggestions? Thanks.

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I have the exact same problem. I know this is over a year old, but does anyone know what this might be?

Posted on Jan 03, 2013

  • Josh Anderson Jan 03, 2013

    I have the exact same problem. I know this is over a year old, but does anyone know what this might be?

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Did you get an answer?thanks

Posted on Oct 28, 2011

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1 Answer

How to fix blown sub (replace fuses etc)...? stop protective light illuminitating?


The first thing to try is to disconnect the sub and all speakers from the amp's output block. The only things that you need connected to the amp are the 12V power, the ground wire, and the remote wire to turn it on. If the protection light comes on with only these three wires connected - your amp has been damaged internally and will either need to be repaired or replaced.

Jul 27, 2013 | Car Audio & Video

1 Answer

My amp has a protection light on need to know how to fix. When I pull the fuses out the power comes in but when I put the fuse back in the protection light comes back on


From the description your audio output transistors or ic's have a short causing a load problem activating the protection circuit. Turn volume right down, power off, remove speaker wires from the back, power on! if protection kicks on it is the audio outputs in the receiver, if not! check speaker wires for shorts, hook back one at a time until defective wire or speaker is located. The audio outputs will need to be addressed by a technician since there is complexity involved.

Mar 03, 2012 | Legacy Car Audio & Video

1 Answer

I am having trouble with my Niles Si-1230 amplifier going into protect mode after turning it on


Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Apr 04, 2011 | Niles SI-1230 12-Channel Amplifier

1 Answer

My SI-1230 was not working on channels 5-6 and 11-12. I opened the amp and replaced the fuses on those channels. Now the fuses blow immediately on channels 5-6 and the red protection light is on...


Chances are the main transistors or whatever powers channel 5 and 6 have shorted out. Fuses blow like this when there is an overload and these power types do that a lot. If it uses transistors, then a ohm meter will show them up quick. Because it will be just like you have touched the test probes together when you put them on the terminals, with the meter on the 1K setting. For the reason these parts are just acting like pieces of wire instead of doing their job.

Mar 12, 2011 | Niles SI-1230 12-Channel Amplifier

1 Answer

The protection light came on in my niles amp si250


Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Eure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Mar 01, 2011 | Niles SI-1260 12-Channel Amplifier

1 Answer

Fusses on channel five and six blown can't read the rating any ides????


If the fuses on the other channels are good, try replacing the bad ones with that type and rating (assuming there are fuses on the other channels). My experiance suggest they should all be the same, as they are dealing with the same power levels roughly.

May 21, 2010 | Niles SI-1230 12-Channel Amplifier

1 Answer

I have 6 speakers connect to my Niles 1230. The 2


First, change them to a different set of channels to rule out any problem with the amp. Next, pull the speakers, depending on the manufacturer, if their older than 1 year they may be blown. If you can pull the grill off the speaker, do so and examine the surround. If it's rubber or plastic, it should be ok. If it's foam or paper, chances are it's bad. If you still have a problem, post a comment and I will help you troubleshoot some more.

Jul 07, 2009 | Niles SI-1230 12-Channel Amplifier

1 Answer

Amp blowing fuses


The amplifier probably has shorted output transistors.

Disconnect the speakers and RCA cables. Replace the fuses with two 10 amp fuses or a single 20 amp fuse. If the amp blows the fuse when it powers up, the outputs are almost certainly the problem. Don't try it with the two 30 amp fuses. The smaller fuses will provide more protection for the power supply. If the amp powers up with the smaller fuses and they don't blow, check the speakers and the wiring (for shorts to ground or shorts between wires).

Nov 22, 2007 | Rockford Fosgate p-450.4 Car Audio...

1 Answer

Fuses


mcm electronics should have them

Apr 03, 2007 | Niles SI-1230 12-Channel Amplifier

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