Sub Woofer Amp cuts out. Power to amp is okay. Amp is well grounded. Trigger wire from dash unit feeding Sub Woofer amp is 12volts. I have checked voltages at amp.all ok. However even with 12volts at trigger wire the red indicator lost signal led on the amp lights up even though the power to the amp is there. Suggestions?
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Your problem is probably that your amp is starving for power. I have a few questions.
1.What size wire are you using for power and ground on the amp?
2.Whats the impedance of your Sub-woofer?
3. How long are the power wire and ground wires.
For starters... I'm going to guess that you usually lose the subwoofer at lower frequencies. The lower the frequency the more power it requires to drive the sub. You also might want to check if you are running the amp bridged but mainly if your amp is trying to push a 50hz tone at high volume, If your alternator cannot provide the required Amperage. The amp will cut out. A capacitor can improve this. Run a power wire from the battery to the positive terminal of the capacitor then from that same terminal run a positive wire to the amp. Connect the ground on the capacitor directly to the body of the car...make sure to scrape off any paint to make a good ground connection.
If you are getting power to the amp, try this....Find a small speaker, unhook your sub and wire speaker to amp. Turn on your system at a low volume....If the other speaker is playing through amp, then your sub is shot.....If the small speaker doesnt work, then its either your channel is gone on the amp or the rcas have quit off off your head unit.
Your amp could be in protection mode! Sometimes turning up to high or wires touching will put in protection mode! It will have to be unplugged for a day or two to drain all power out of the memory. Leave accessorie/ignition wire hooked up, just not power and ground wiring. It should reset itself.
You do not specify the make and model of your amp, so it is not possible to point you to specific troubleshooting information. However, some problems are generic and it appears that you have already isolated the problem to the amp itself.
It's still possible that the head unit does not provide a strong enough input signal, but your amp should have a level control that allows you to match it to the head unit. I'd also doublecheck the other amp settings. If the setting check out, it's likely that the amp is defective.
Then the power wires going to the amp are not heavy enough to keep power to the amp.Or other causes can be the wires going to the sub are either loose or touching.Check all wiring for tightness and wires not touching..If all that checks out then try a different size wire to positive and ground wire Hope this works for you..Have a great day
The problem would be if you had it switched around. The 1200W subwoofer only means that it can handle 1200w of power the 1000w amp means that it can deliver 1000w of power. What you may have is an impedance mismatch. My question is what is the resistance rating on the sub woofer and what is the minimum resistance rating of the amplifier. These are actully the important issues at hand.
the rating of the subwoofer resistance in Ohms should never be lower then the minimum resistance rating on the amplifier. in fact the resistance rating on the amp should match the resistance rating on the subwoofer.
Thanks for the reply. I'll take it apart and check it out.
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