What's wrong with my amp?

[Skoty422 10+ year member]

Ok so I was going to set the gains on my rf bd1500.1 with a dmm and they will only read 17.9v with a 50 hz test tone. Anyone know what's going on? I haven't used this amp in years. Is it possible that it just messed up? Any way I could do some test to check it out? Oh I just remembered I did use it a month back and hooked it up to two jl10's for about 30 sec before I blew the surround off them. I disconnected the remote wire off of it and haven't powered it up until today. I had phase set at zero. Subsonic filter off. But if I would adjust the lpfreq filter the volts would move up and down. Also that is with the gain wide open. Hi set to 45 sub at -12 db slope. 50 hz filter from head unit. Set to mono. I think that's everything. All sub levels set at zero.

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[Loudmp5 10+ year member]

Why is the gain all the way up?

 

[Skoty422 10+ year member]

I started off with the amp gain all the way down. Then gradually turned it up. Then I realized that it was all the way up and only 17.9v! I then checked the volume on head unit. It was at my max of 45.(80prs) checked all other settings. They are fine. I did not have a load hooked to it and front and rear spkrs were muted.

 

[Skoty422 10+ year member]

I I was trying to get around 54 volts of gain on dmm. Any suggestions?

 

[Loudmp5 10+ year member]

What is dmm set to read ac or dc? Also your rcas are hooked up right lol, had to ask you just never know lol

 

[Skoty422 10+ year member]

Ac. Lol. Yes RCA are hooked up.

 

[Loudmp5 10+ year member]

http://forum.sounddomain.com/ubbthreads.php/ubb/showflat/Number/65167/page/1 idk reset your dmm hold pos and neg together so make sure its zerod out also this like will help you

 

[Skoty422 10+ year member]

Ok. I'll try it. Does this amp have internal fuses? Maybe one of them crapped out on me?

 

[audiobaun 5,000+ posts]

Ok. I'll try it. Does this amp have internal fuses? Maybe one of them crapped out on me?

No it does not..you should have an external fuse on that amp.of approx 60-80 I believe if i can remember, and needs 4ga wire feed, as well as 4ga ground if i remember

 

[Skoty422 10+ year member]

150 amp external fuse. And I have 2 gauge ground and power off dist blocks fed by 2/0 gauge

 

[audiobaun 5,000+ posts]

150 amp external fuse. And I have 2 gauge ground and power off dist blocks fed by 2/0 gauge

plenty of juice..Did that amp shut down on you/go into protect when you had those jbl subs going?

 

[Skoty422 10+ year member]

plenty of juice..Did that amp shut down on you/go into protect when you had those jbl subs going?

No. Not at all. But it does whine. I don't remember if it did that before or not. But I've read a few post that says they infamous for one to whine. I have a ppi275 that will give me 34v at 3/4 gain. I don't know what's the deal with this rf!

I tried the zero out on dmm and same thing. 17.9 v.

 

[audiobaun 5,000+ posts]

No. Not at all. But it does whine. I don't remember if it did that before or not. But I've read a few post that says they infamous for one to whine. I have a ppi275 that will give me 34v at 3/4 gain. I don't know what's the deal with this rf!
I tried the zero out on dmm and same thing. 17.9 v.

Wow..Hmm,Id pm @Spooney, he would have some better insight of that amp..he works on amps as well.I deff dont have an answer for you,I can only speculate,

 

[Skoty422 10+ year member]

Ok so I did a few test. I'm getting 13.8v dc of power to the amp. I changed RCA to see if they were bad but with lpf set to 50hz and gain all the way up output reads 15.6v ac on dmm. If I change the lp frequency and turn it all the way up it'll read 17.9v ac. But that's all I could get out of it. Anyone have any suggestions or ideas?

 

[m3dia_lab 10+ year member]

adjust your x-overs, start with them off and see if its any better...