correct amp?

[bingkewl]

i want to hook up 2 12" rockford p1s814 into an alpine MRV-F305. the subs are 8ohms. i'm having trouble finding specs on the amp, but i believe the amp handles 4ohms, so if i bridge the subs i should be fine?

does anyone have spec on this amp?

could i hook up my speakers (alpine SPR-57C) into the amp also? it is 4channel.

is the amp 400watts per channel or all the channels bridged?

Thanks.

T.Carter

[bjboertje]

you could bridge the rear channels of the amp and run the subs wired in parallel. then run the front channels to your SPR-57Cs. that would only give the subs 60 watts rms each though. your amp is 50 rms X4 into 4 ohms. 120 rms bridged X2 into 4 ohms.

[bingkewl]

Originally Posted by bjboertje

you could bridge the rear channels of the amp and run the subs wired in parallel. then run the front channels to your SPR-57Cs. that would only give the subs 60 watts rms each though. your amp is 50 rms X4 into 4 ohms. 120 rms bridged X2 into 4 ohms.

so if i wanted to pump the full 300watts into the subs, i should bridge it x2, and get a seperate amp for the speakers.

ty

[PaulD]

all regular car amps are rated at 4 ohms, and the class D one are rated at like 1 or 2 ohms. Why are your subs ratd for 8 ohms ?

[bingkewl]

Originally Posted by PaulD

all regular car amps are rated at 4 ohms, and the class D one are rated at like 1 or 2 ohms. Why are your subs ratd for 8 ohms ?

#1: the guys at the sound shop suggested 8ohms

#2: i was under the empression that 8ohms is "standard" and anything else was unusual.

[bjboertje]

Originally Posted by bingkewl

so if i wanted to pump the full 300watts into the subs, i should bridge it x2, and get a seperate amp for the speakers.

ty

no, you can't use your amp or your subs to their full potential together. if you bridged the amp, ch 1 and 2 to one sub, 3 and 4 to the other, the amp would only see an 8 ohm load per set. then you would only be pushing 80 watts or so per sub. you really need either a different amp or different subs. those don't work too well together.
if you want to keep the amp, get a pair of subs that can be wired to 4 ohms each.
if you want to keep the subs, get a two channel amp that pushes around 300rms into 4 ohms bridged.

[bingkewl]

Originally Posted by bjboertje

no, you can't use your amp or your subs to their full potential together. if you bridged the amp, ch 1 and 2 to one sub, 3 and 4 to the other, the amp would only see an 8 ohm load per set. then you would only be pushing 80 watts or so per sub. you really need either a different amp or different subs. those don't work too well together.
if you want to keep the amp, get a pair of subs that can be wired to 4 ohms each.
if you want to keep the subs, get a two channel amp that pushes around 300rms into 4 ohms bridged.

****, that's not good.

[PaulD]

8 ohms is the HOME standard ..... 4 ohms is the standard for car speakers. Sounds like you need a new stereo shop.

[bingkewl]

Originally Posted by PaulD

8 ohms is the HOME standard ..... 4 ohms is the standard for car speakers. Sounds like you need a new stereo shop.

ah, see that's it. my father was an electrition, and i do electrical stuff now and than, so to me, 8ohms is standard for everything.

the dudes at the sound shop suggested 8ohms, i have no idea why.