whats wrong here?

[magnumsrt8215 10+ year member]

I went out on a limb and bought a digital designs m1c from a member here new. My wire wasalready ran so just had 2 plug it in. I'm using 0gauge power and ground. I have 2 10w7's sealed. I have no strong bass. Its definately not say 800-900 watts by no means. I don't hae an eq and the hu is a jvc nothing fancy but this thing is not kicking at all. The speaker wires are not reversed, I checked that. My other car sounds waayy better with an oldschool punch p400.4 runing my 2 alpine type r 10s so each sub would be getting 200 watts. No eq in that car either. Something has 2 be seriously wrong. I know thses subs will kick more and I know this amp has 2 have more than this 2 give

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[Fiendstolemyamp 10+ year member]

Is the low pass filter on? If not switch it to on.

 

[Germ305 10+ year member]

Also...maybe dumb but simple...Did you check the gains? as well as the sub level settings on the H/U?

 

[magnumsrt8215 10+ year member]

There is no sub volume on the radio. Bass if flat. The gain is set 2 just over half, and the bass boost on the way up just 2 get some bass going.

 

[subzero 5,000+ posts]

what are the subs wired to? check the sub wiring, also make sure you pluged RCA into the correct slot. Is the deck fader in center position.

 

[magnumsrt8215 10+ year member]

the amp is a monoblock, it doesnt have a lp hp switch. there is only 1 set for rca's unless i add another amp and the n its only 1 input so 3 total. The subs are wired down to 1.5ohms. i have checked the wiring and everything appears to be good, but when i get off work i will check again. the fader is centered. I had a tma 1000 in there before i bought this amp and subs and it hit really nice. i have not changed any settings on the hu at all plus the radio is very simple so not really anything to change. bass, mid, treble, bal, fader, and s.bass thats all. not even a loud button.I plan on changing out the hu but that has nothing to do with why there is just a lack of output on the bass side. The mid and highs are nice and loud, so that leads me to believe is amp or subs. I may have 2 take the alpines out of my other car just 2 be sure its not the subs which i really dont think it is, but i may have reversed a wire when putting the subs in the box. Is there a way i can tell that with a meter without having to take the subs out?

 

[Z1NONLY 10+ year member]

A small 9V battery will make a speaker jump "out" when polarity matches the battery, and "in" when it's reversed.

 

[magnumsrt8215 10+ year member]

DD Audio: Mobile Audio | Amplifiers | M1c here are the specs and pics

 

[Heeltoeclutch 10+ year member]

A small 9V battery will make a speaker jump "out" when polarity matches the battery, and "in" when it's reversed.

even a AA or AAA //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif though never tried it on a sub.

 

[Timmothy Web 10+ year member]

whats the voltage at the power terminals when the amp is playing?

 

[Kangaroux 5,000+ posts]

Turn down your bass boost all the way before you damage any of your equipment...

 

[shizzzon 10+ year member]

do this but do not leave it like that as you may damage your sub(s). Fair warning!

Make sure amp is set to Output Master.

Set LPF directly vertical

Set subsonic all the way to the left(as if it were off)

Make sure your gain is "little over half" vs all the way down..

All the way down looks like a little over half, btw...

If all you've done is direct amp swap and after doing what i said above doesn't justify the output, tell me what amp you previously had in there.

 

[akheathen Premium Member]

well, that amp will take 8v. if your head is as plain and simple as you say, then chances are, it is.2-.4v output..... so, gain could need to be near all the way. use a tone, and measure the ac output for 1k via ac voltage. sometimes, rarely, but sometimes, i need to have the gains all the way up with a little bass boost, or slap in a line driver/eq(better option) just to get rated out of an amp, and that's not with the amp itself clipping.

 

[magnumsrt8215 10+ year member]

ok so after work yesterday i was determined to get this thing right, so i checked over the wiring, that was good, i checked the subs with a AA battery(cool lil trick) they were good. I then hooked the subs up to my jl 300/4 and got more bass output with the gains all the way down(which i didnt even know) and the radio at a lil over half. I was surprised at the sound. I then went back to the dd and just kept messing around with it and the hu. Finally i got it to sound like something. Im still a little high on the gain, and the bass boost but for some reason it does sound better. It still doesnt sound the way i know it should being around 1000 watts but its alot better then it was. If i had to guess it probably sounds more like maybe 500. The subs are moving a lil now where as before they barely did. Next up is definately a nice hu, maybe some alpine or eclipse. But truth be told my other car with the alpine type r 10's still sound better and sounds like they get lower too. Maybe its the head unit, hopefully its the head unit. I will have to try to find something good for cheap cuz i ran over my budget so im outta $$$.

 

[Z1NONLY 10+ year member]

I had a cold solder joint on a PCB once that had symptoms like that. IIRC it was where one of the RCA's mounted to the board. I could change the output of the amp just by putting a little pressure on one of the RCA's. (sidways).

The way the RCA's are on your amp makes the same exact problem almost impossible, but there could still be something lake that going on inside the amp with a different connection point for another component. I isolated my problem when I noticed removing one of the RCA's didn't lower the volume sometimes.

Also, some of the commercial amps I deal with get "dead spots" on some of the switches that can cause problems with output. I have even seen gain controls get "dirty" on older car amps. (You can hear static as you adjust the pot up and down. In both cases moving the switch/knob through its range a bunch of times usually fixes the problem.