Amp doesn't work

[Flipx99 5,000+ posts]

I bought a new US AMPS Merlin D2. It only plays very low. It hits very low as if something is wrong or not hooked up correctly. I checked the gains with a DMM. I am only getting 13.5 V.

Any ideas?

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[bri487 5,000+ posts]

what do you mean, it hits very low? maybe the crossover is on low-pass.

 

[Flipx99 5,000+ posts]

It plays at low volume. It's a class D amp - no crossover

 

[Chevyaudio 5,000+ posts]

When it only "plays at low volume" Do you mean that when the volume on the HU is high the speakers that are hooked up to the amp arent loud, or that it only works when the HU is at a lower volume setting.

 

[Flipx99 5,000+ posts]

The volume on the HU is high. My other amp works fine. The US AMPS just doesn't play very loud. A 6x9 hits harder than my subs.

 

[tplaya07 10+ year member]

Are you sure its not any settings on your HU? Do you have the sub channel turned down or off? Or do you have any other equalization on the HU that would affect the sub?

What subs do you have, and how are they wired? Possibly have them wired backwards (series, instead of parllel), where your ohms would increase and have alot less output?

 

[Flipx99 5,000+ posts]

The polarity is fine because they would go inward rather than outward. I think it could possibly be a HU setting issue. I never had 2 amps before and I don't know if the old pioneer can understand what to do. Would it matter if RCAs were backwards? I rechecked the wires and wired them per JLaudio.com tutorial. I just believe it is a setting issue somewhere.

 

[Flipx99 5,000+ posts]

bump

 

[Flipx99 5,000+ posts]

once a day bump cuz it still don't work...

 

[negativezeroz 5,000+ posts]

What HU do you have and what amps are you running besides the D2? Exact wiring descriptions could help.

 

[JimJ 5,000+ posts]

It has to have a crossover...if it didn't, you'd be hearing full-range material through your subs.

Re-check it again.

 

[Flipx99 5,000+ posts]

I have Pioneer 740MP.

My another amp is a diamond audio D3.400 -->works great, still trying to tune it but always getting better.

I have a battery terminal with a 4ga and 0ga. The 4 ga is going to the D3.400 and 0ga to the D2. Both amps come on. I have noticed that in wiring if I use the left side, the remote knob works, but the right side it does not.

My friend said it did not have a cross-over, but there are a couple of tuning options. I assume that would be the cross-over.

What I belive is occuring is that I have one tuning option cancelling out the other tuning option. I have moved the gain up and down with no real results, however I do have dimming which leads me to belive the amp is requiring more power at higher gains (which makes sense to me) however output is not increased.

I am running 2 pioneer 2000spls wired down to 1 ohm.

I can provide any more info if needed.

 

[negativezeroz 5,000+ posts]

24dB crossover...Im gonna guess thats the SSF though....

 

[Flipx99 5,000+ posts]

sub-sonic...yeah

 

[Flipx99 5,000+ posts]

maybe it sets below hearing? I know my friend had a bass cd one time and his subs just moved but you could not hear them. Is this possible here?