Why amp wont turn on

If the enclosure isn't the right fit for the sub, the sub typically won't sound right. An improperly mounted speaker can allow air to escape while you're listening to music, as the vibrating speaker cone drives air into and out of the box past the seal. Seating the speaker properly to stop the resulting fart-like sounds. If there's nothing wrong with the enclosure, make sure that the woofer is impedance-matched.

Impedance matching is simple if you have one sub hooked to one amp; it either matches or it doesn't. If you have multiple subs hooked to a single amp, you'll need to do some calculations based on whether they're hooked up in series or parallel. If the impedances match, check the power ratings of both the sub and amp, and make the necessary corrections if the amp is under-powered or over-powered.

If you're simply overpowering the sub, get a bigger subwoofer or don't overpower it for example, turn down the gain at the head unit, turn down the bass boost, and adjust all the settings until the woofer stops farting. Actively scan device characteristics for identification.

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He is also a systems administrator for an IT firm in Texas serving small businesses. Article reviewed on Feb 19, Tweet Share Email. The 3 Best Car Stereo Systems of Was this page helpful? Thanks for letting us know! Email Address Sign up There was an error. Please try again. Every once in a long while, the lights on the front of the power amp will light briefly and then die, but 98 percent of the time, nothing. I have opened it up, and here is the power path:.

There is a black wire that goes straight into the heart massive heavy cylinder of wires of the amp. There is another black wire with a capacitor I think? This wire goes to the switch in the front, which is a simple push button. There is a blue wire coming out of the switch back into the heart of the amp, completing the circuit.

The rest of the components led board, input boards, output boards, volume knobs seem irrelevant because it's not getting power at tall but I could be wrong. Here's a pic of the entire setup:.

Well ur not dealing with dc here so a loose ground wouldnt normally be the problem a loose neutral would b more like it but honestly id hav to look at it to tell u for sure but i would take a multimeter and check fir voltage u hav the right idea follow the curcuit from power source untill u find the loss of power then when u find where ur loosing power u can sesrch for the issue at that point if mits a bad part or a loose wire u can find the issue wherever u loose power.

I don't have an answer, but question. Before, I could turn the volume up to about 45 or so, now if it goes past 19 in which makes it hard to hear many movies it will cut completely OFF! Please Help :. You most likely are invoking the protection circuit to prevent power from damaging the rest of the unit or your toroid is open. Good news is the partial schematic your unit is available online. I'd start with testing the output of the "Heart" Thats a toroidial transformer It looks like the yellow and orange pairs feed the side boards.

Does the amp have a charger dc input? It started to hum but not power on using the AC home plug. I had a dc charger lying about 12v 3a so i thopught id try it. Worked like a dream, powered up and i now have my sound back. Just a thought. February 20 by Andi Sadler. I happen to live in your area. Is there a way we could meet up and I could take a look at the amp for you. You could bring it by my church either this coming new years or this saturday night.

Let me know so I can come early Removed and checked the front ON switch for power continuity with power turned unplugged, just use a multimeter on continuity check. Checked to see if any of the electrolytic capacitors had "popped tops" if they had blown.

Use extreme caution, there is live V leads in areas that you can touch with your hand! I recommend using only 1 hand while anywhere near a large voltage, incase of any shock, the current wont go through your heart.

Use a multimeter to check the voltages coming out of those two power cables, they should be somewhere around 70Vrms. Everything checked out ok, so I turned power off. Plugged everything back in where is was supposed to be, and turned the power back on. And it worked!! If you cannot detect any energy, check it for any inline fuses that might have occurred.

This step should solve the issues with your amp. As you inspect the power wire, you might see loose connections, shorted out spots, or corrosion.

These three issues can cause the amp to fail to turn on when engaging the system. Should the ground connection be limited, the amp might not engage as expected. Correcting these issues can restore your audio to what it was before experiencing these issues. Most amps offer a protect mode feature that limits functionalities to prevent additional damage to affected internal components.

It would be best to check all of the following components to determine where the problem exists. Before checking on these items, ensure your amp has power going to it first. You can start this process by unplugging your speaker wires. Performing a visual inspection of each subwoofer and speaker should show where the malfunction happens. This issue occurs if the wires contact the ground, become loose, or engage with bare metal. If you still have the protect mode light on after inspecting these issues, your final step is to examine the RCA patch cables.

When they become faulty or grounded out, the result is often this issue. Try hooking up different RCA cables to the amp and head unit. You might hear distorted sounds coming from the amp after turning it on. If you hear this issue through the speakers, it is evidence that your subwoofer is overtaxing the system.