More gain setting questions....

[Demi 10+ year member]

Okay well im throwing a MRD-M1005 on my 3 10" four ohm Type-Rs. My question is i dont know the output of my amp at 2.67ohms, so how do i set my gains with a multimeter? Anyone have the specs at this impendence?

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[Phreaker 10+ year member]

The amps specs at 12 volts are as follows:

500w x 1 channel @ 4 ohms

700w RMS x 1 channel @ 2 ohms

Amps specs 1ith 14.4 volts:

1000w RMS x 1 channel @ 2 ohms

I'd say it'll be about 900w RMS.So using the DMM set to AC voltage on the amps speaker terminals and the car on and running and HU volume set to max volume before clipping start turning the gain up until the DMM reads about 40v AC on a 40-50Hz test tone tht was recorded at 0db's which can be found at ROE in the downloads section.

 

[Demi 10+ year member]

Thanks dude! Another question. Thats alot of power to throw at 500w rms subs. I know alot of people run them at 700w+. What kind of risks am i talking or will the gain setting prevent damage?

 

[mikeyboc 10+ year member]

If you have 3 subs, and roughly 1000 RMS, that is only about 333 per sub. Set your gains correctly as to not send a clipped signal and you will be fine.

People throw 700 per sub at them, most with no problems.

 

[Demi 10+ year member]

333w per sub? I didnt realize it worked that way. So because im running two now at 600w each sub is really getting 300W?

so to max it out i would need something that put out 2100W at 2.67 Omhs?!?! Jesus.

 

[jeepintn 10+ year member]

yes

 

[Demi 10+ year member]

So i imagine with that amp 2 10" would actually hit harder than 3?

 

[mikeyboc 10+ year member]

333w per sub? I didnt realize it worked that way. So because im running two now at 600w each sub is really getting 300W?so to max it out i would need something that put out 2100W at 2.67 Omhs?!?! Jesus.

sounds about right. If you have the time, after you install the amp, try hooking 2 subs to it and see if it has the output you want. Then try with 3 and see what sounds best to you.

There are wuite a few setups that don't use much power and get very loud. It is all install dependant. Ultimately, if it is loud to you and is what you want, who cares if you only ran 50 rms to 'em. As long as your happy, don't get too caught up in the numbers game.

 

[mikeyboc 10+ year member]

So i imagine with that amp 2 10" would actually hit harder than 3?

Not necessarily (sp?), power is not going to directly equate to how "hard" they hit. If it were me, I would try it both ways, as in my previous post.

 

[Demi 10+ year member]

sounds about right. If you have the time, after you install the amp, try hooking 2 subs to it and see if it has the output you want. Then try with 3 and see what sounds best to you.
There are wuite a few setups that don't use much power and get very loud. It is all install dependant. Ultimately, if it is loud to you and is what you want, who cares if you only ran 50 rms to 'em. As long as your happy, don't get too caught up in the numbers game.

I see, well i would hate to throw away the money to build a box for three and then it not be a big improvement ya know? Wood is really expensive here.

 

[mikeyboc 10+ year member]

I see, well i would hate to throw away the money to build a box for three and then it not be a big improvement ya know? Wood is really expensive here.

Are you going ported or sealed?

 

[Demi 10+ year member]

Ported.

 

[mikeyboc 10+ year member]

MDF is $20 per sheet here, exactly how expensive are you talking?

 

[Demi 10+ year member]

60Euro a sheet, so like $90

 

[Demi 10+ year member]

I think i will just continue as planned and see what i get. 3 10"s in a ported box tuned to about 36hz on the alpine.