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Topic Review (Newest First)
07-04-2013 11:09 AM
woansleftpeg
Quote:
Originally Posted by Jaybirdd View Post
They want me to pay a $20 fee to return my $40 amp for a refurbished one. Thats just not worth it to me. I'll just use this one as a single channel amp for my sub and buy a better one for the speakers. Trust me it won't be a Boss audio one. I guess you really do get what you pay for.
Just realised that you didn't buy the Alpine, you got a Boss Audio on my recommendation.

redface.jpg

In my defence I've done a Boss amp before in a friend's Civic and it's still happily bumping along a couple of years later. Still, charging you to replace it under warranty is bullshit.
07-04-2013 11:03 AM
n00g7 As for your 4chan amp, I'd get one of these. Amazon.com: MRX-F35 - Alpine 4-Channel X-Power Series Amplifier: Electronics
07-04-2013 11:01 AM
n00g7 So, when you get a sub -- get a dual voice coil with 4 ohms at each coil and wire in parallel then bridge the output of the good channels
07-04-2013 10:48 AM
Jaybirdd They want me to pay a $20 fee to return my $40 amp for a refurbished one. Thats just not worth it to me. I'll just use this one as a single channel amp for my sub and buy a better one for the speakers. Trust me it won't be a Boss audio one. I guess you really do get what you pay for.
07-04-2013 10:36 AM
woansleftpeg
Quote:
Originally Posted by n00g7 View Post
There isn't anything you really could have done wiring the speakers that would fry it --- it has a protect mode to prevent that. Return it.
Agreed, although if you read back in the thread some of the original wiring was a bit funky. Not sure that there was anything that would have caused damage though, and even then they'd need to prove that you wired it incorrectly. Send it back and get a new one, don't try and kluge it on two channels unless you have no choice.
07-04-2013 10:33 AM
n00g7
Quote:
Originally Posted by Jaybirdd View Post
The warranty says damage due to incorrect wiring is not covered and I'm sure I messed something up along the way. I'll just run them in parallel and sacrifice ballance. Fade is more important to me anyway. If I do fry my $40 amp further I'll just upgrade when I do my sub in the future.

There isn't anything you really could have done wiring the speakers that would fry it --- it has a protect mode to prevent that. Return it.

The problem with wiring such that you don't have balance, is that your right channel is now the front (or rear) and your left channel is now the rear. It makes for awkward listening.
07-04-2013 10:30 AM
Jaybirdd The warranty says damage due to incorrect wiring is not covered and I'm sure I messed something up along the way. I'll just run them in parallel and sacrifice ballance. Fade is more important to me anyway. If I do fry my $40 amp further I'll just upgrade when I do my sub in the future.
07-04-2013 10:29 AM
n00g7
Quote:
Originally Posted by woansleftpeg View Post
You can do that, either by doing it as noog says or by going FL/FR and RL/RR in parallel and sacrificing balance. Your amp (Alpine MRP-300) is 2ohm stable, so there's no problem doing that; if the amp's new, though, I'd send it back and have it replaced under warranty.
I wouldn't wire it like this though, because your stereo source would sound really f'd up being Front and back instead of left and right.
07-04-2013 10:19 AM
woansleftpeg
Quote:
Originally Posted by Jaybirdd View Post
Yeah the gains are all the way down and no filters. Is there any way I can save my amp, or should I just toss it? Would wiring all 4 speakers into the 2 channels work? Essentially giving me a 2 channel amp.
You can do that, either by doing it as noog says or by going FL/FR and RL/RR in parallel and sacrificing balance. Your amp (Alpine MRP-300) is 2ohm stable, so there's no problem doing that; if the amp's new, though, I'd send it back and have it replaced under warranty.
07-04-2013 10:15 AM
Jaybirdd Yeah the gains are all the way down and no filters. Is there any way I can save my amp, or should I just toss it? Would wiring all 4 speakers into the 2 channels work? Essentially giving me a 2 channel amp.
07-04-2013 10:13 AM
n00g7
Quote:
Originally Posted by Jaybirdd View Post
Thanks for the quick reply! Switching the inputs has no effect. No matter what channels I connect the RCAs to its still only the rear speakers. I can also make just the front speakers work. by switching the speaker wires to the 2 "good" channels.
Not completely following, but if you post up what amplifier you have, and it's 2ohm stable, you could hook up the FR and BR in parallel and the FL and BL in parallel and use just the good outputs. You wont have any fade control though.
07-04-2013 10:09 AM
woansleftpeg
Quote:
Originally Posted by Jaybirdd View Post
Thanks for the quick reply! Switching the inputs has no effect. No matter what channels I connect the RCAs to its still only the rear speakers. I can also make just the front speakers work. by switching the speaker wires to the 2 "good" channels.
Yeah, I edited my post because I realised you said that all four channels off the head unit are good when the speakers are directly wired, but you were too fast for me.

Clearly the speakers and the wiring are good, so the problem is in the amp. Make sure all gains are set to minimum and all filters are off. If it's still not working, I can only think that there's a problem with the amp.
07-04-2013 10:02 AM
Jaybirdd Thanks for the quick reply! Switching the inputs has no effect. No matter what channels I connect the RCAs to its still only the rear speakers. I can also make just the front speakers work. by switching the speaker wires to the 2 "good" channels.
07-04-2013 09:55 AM
woansleftpeg It means that the problem is in the amp, not the speakers. Do you have all gain controls turned to their lowest level, and all filters turned off?
07-04-2013 09:48 AM
Jaybirdd
Quote:
Originally Posted by woansleftpeg View Post
OK, quick and easy troubleshooting exercise - move the wires from the rear speakers to the front channels and the front speakers to the rear channels. Does the problem shift, or do the rear speakers still distort?
Sorry it's been so long. I've been super busy with work and stuff and my radio works fine without an amp but I'd like to finally figure this out. When I switch the front and rear channels the problem shifts to the front. What does this mean?
06-10-2013 08:57 PM
woansleftpeg OK, quick and easy troubleshooting exercise - move the wires from the rear speakers to the front channels and the front speakers to the rear channels. Does the problem shift, or do the rear speakers still distort?
06-10-2013 08:24 PM
Jaybirdd I have everything hooked up and the front speakers sound awesome but I can't seem to find any combination of wires or settings that make the soundbar speakers work properly. When I have the gain really low, I can just faintly hear the music coming from them even at full volume. As soon as I turn the gain up even the smallest amount, the speakers in the back distort like crazy. The front speakers however, I was able to dial in with a separate gain knob easily.
06-10-2013 07:44 PM
woansleftpeg OK, if you haven't tuned the amp you should do that. Your rear speakers are less powerful than your fronts, so if you have the gain set equally on front and rear channels then your rears are going to distort while your fronts are sounding good. You need to set the gain controls to the right levels so that both sets of speakers are operating in their optimum range at the same time. Ideally, tune them using test tones.
06-10-2013 06:04 PM
Jaybirdd Dash- Kicker 5 1/4 in. DS525 (6-35 W RMS)
Soundbar- Kicker 6 3/4 in. DS65 (6-50 W RMS)

The soundbar is polyfilled as noted by n00g.
06-10-2013 06:01 PM
n00g7 Is it the speakers, or the sound bar? The sound bar/pods are crap, and you poly filled it, so turn the bass way down and see if they still distort. You should set up the amp to do high-pass to cut out bass.
06-10-2013 05:52 PM
woansleftpeg
Quote:
Originally Posted by Jaybirdd View Post
I installed it under the drivers side dash. I found a factory grounding point and bolted the ground wire to it. Now I managed to get rid of the popping in the speakers and the front two sound great but the rears are very quiet. When I try to turn up the gain on the rear speakers they distort almost immediately.
Are they the same speakers as you have in the front?
06-10-2013 05:51 PM
Jaybirdd
Quote:
Originally Posted by woansleftpeg View Post
Where did you install the amp? If it's under one of the seats then there's a factory grounding point under the innermost seat post, you just need a 10mm wrench to remove the nut.
I installed it under the drivers side dash. I found a factory grounding point and bolted the ground wire to it. Now I managed to get rid of the popping in the speakers and the front two sound great but the rears are very quiet. When I try to turn up the gain on the rear speakers they distort almost immediately.
06-10-2013 02:48 PM
woansleftpeg Where did you install the amp? If it's under one of the seats then there's a factory grounding point under the innermost seat post, you just need a 10mm wrench to remove the nut.
06-10-2013 02:29 PM
Jaybirdd I dont think its interference with the power cable. When I wiggle the amps ground cable I can get the popping to stop for a sec. Ill try to find a better ground.
06-10-2013 02:21 PM
woansleftpeg Are the RCA leads from the HU taking a different route to the amp than the power cable? There's a lot of juice in the power cable and the magnetic field from it can cause distortion in your signal.
06-10-2013 02:16 PM
Jaybirdd
Quote:
Originally Posted by woansleftpeg View Post
When you say the speakers are popping, do you mean on turn-on or constantly?
They pop constantly. The rear speakers are a louder pop and I can drown out the popping by turning the volume up but when I keep the volume low/on mute they pop steadily about 2x a second.
06-10-2013 02:14 PM
woansleftpeg When you say the speakers are popping, do you mean on turn-on or constantly?
06-10-2013 01:54 PM
Jaybirdd
Quote:
Originally Posted by CoreyZ View Post
Did you disconnect the speaker wires in the harness so that they are no longer connected to the head unit and only have the RCA?
I actually cut the wires labeled for each speaker that came out of the harness and ran my speaker wire from the amp to them. The only wires still connected to the car through the harness are the red ignition/switched, yellow battery/constant, orange dimmer, and black ground wires.
06-10-2013 10:09 AM
CoreyZ Did you disconnect the speaker wires in the harness so that they are no longer connected to the head unit and only have the RCA?
06-09-2013 06:13 PM
Jaybirdd Alright guys, I just wired everything and was able to get it to work without the amp perfectly. Turns out there was a short going to the front left speaker. Next I tried wiring all the speakers to the amp and I got the amp to turn on and stay on and no error messages but the speakers are popping. The music still plays but when I mute the radio the speakers all pop to the same beat. What could this be?
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