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#1
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2 Amps, 1 Sub and a pair of 3Ways.. should I use an active x-over?
Hi,
I have just won a pair of older Rockford amps off ebay, a 45.2 and 75.2. I have a pair of 8" Alpine 3 way full range speakers in an MDF back shelf, and am about to have a ported MDF box made for my Rockford 10" (SPP-104) bass driver. Thing is that I have an old Alpine active crossover (3655) that I've had knocking around for years from an old install. It will run 2-3 amps. Would people recommend that I use this to do my filtering, or am I better off using some Y RCA splitters and using the built in filters on the amps? Also, I think I know the answer to this, but I might as well ask while I'm here- I am better off bridging the 75.2 for the sub and using the 45.2 for the full range speakers.. . aren't I?? Thanks for your help -C- |
#2
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2 Amps, 1 Sub and a pair of 3Ways.. should I use an active x-over?
for the crossover, Yes. IMHO you should use it.
for the amps, Try them both ways and listen/find out which sounds better. Usually you can never have too much power for subs, so start with the 75x2 bridged to that. A RF 75x2 should do over 250W bridged mono. Garrett Chilsta wrote: Hi, I have just won a pair of older Rockford amps off ebay, a 45.2 and 75.2. I have a pair of 8" Alpine 3 way full range speakers in an MDF back shelf, and am about to have a ported MDF box made for my Rockford 10" (SPP-104) bass driver. Thing is that I have an old Alpine active crossover (3655) that I've had knocking around for years from an old install. It will run 2-3 amps. Would people recommend that I use this to do my filtering, or am I better off using some Y RCA splitters and using the built in filters on the amps? Also, I think I know the answer to this, but I might as well ask while I'm here- I am better off bridging the 75.2 for the sub and using the 45.2 for the full range speakers.. . aren't I?? Thanks for your help -C- |
#3
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2 Amps, 1 Sub and a pair of 3Ways.. should I use an active x-over?
Aren't those older Fosgate amps not 2 ohm mono stable? The OP doesn't
mention what sub or subs he will be using and the impedance. It MIGHT be an issue. Brandonb Sanitarium wrote: for the crossover, Yes. IMHO you should use it. for the amps, Try them both ways and listen/find out which sounds better. Usually you can never have too much power for subs, so start with the 75x2 bridged to that. A RF 75x2 should do over 250W bridged mono. Garrett Chilsta wrote: Hi, I have just won a pair of older Rockford amps off ebay, a 45.2 and 75.2. I have a pair of 8" Alpine 3 way full range speakers in an MDF back shelf, and am about to have a ported MDF box made for my Rockford 10" (SPP-104) bass driver. Thing is that I have an old Alpine active crossover (3655) that I've had knocking around for years from an old install. It will run 2-3 amps. Would people recommend that I use this to do my filtering, or am I better off using some Y RCA splitters and using the built in filters on the amps? Also, I think I know the answer to this, but I might as well ask while I'm here- I am better off bridging the 75.2 for the sub and using the 45.2 for the full range speakers.. . aren't I?? Thanks for your help -C- |
#4
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2 Amps, 1 Sub and a pair of 3Ways.. should I use an active x-over?
...Papewayo #026
teamROCS Thanks for the info teamROCS- that's pretty much what I was thinking, and it makes sense (which always helps). I'm just finalising the dimensions of the sub box (with the help of the good people on http://www.diysubwoofers.org) To the poster who mentioned about being stable @2 Ohms, that's not an issue as I'm only using one 4 Ohm driver, and the specs state that it is stable (in fact I think it's best?) @ 4 Ohms. As for the soundstage coming from the back, yes this is an issue. I do have some tiny Pioneer speakers in the standard dash mounts, but am looking to get some mids in the kick panels of the front footwells, and some tweeters somewhere I've yet to deicde (maybe under the dash speaker grilles to keep 'em hidden)... Anyway, hopefully I'll be sorted in a few weeks' time. Looking forward to it. Cheers all, -C- |