3 speakers, 1 channel

[MrSwiss 10+ year member]

here is the scenario

2 aa poly mids, (80-100wrms each) and a tweeter(not yet chosen).

the channel is 100w @ 4ohm, and 125wrms @ 2 ohms.

the speakers are 4 ohms each. obviously the amp is only 2 ohm stable. do u think i can efficiently supply power to 2 6.5mids and a tweet in each door?

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[acold7dusta 10+ year member]

what amp is it?

if you are running an external crossover, i know that will yield 4 ohms if one 6.5 is 4 ohms, and the tweeter is 4 ohm, but i dk what it would be if you ran 2 6.5s sorry

 

[Prowler573 5,000+ posts]

here is the scenario
2 aa poly mids, (80-100wrms each) and a tweeter(not yet chosen).

the channel is 100w @ 4ohm, and 125wrms @ 2 ohms.

the speakers are 4 ohms each. obviously the amp is only 2 ohm stable. do u think i can efficiently supply power to 2 6.5mids and a tweet in each door?

125w @ 2 Ohms will give each mid 62.5 watts each.

Adding a third driver is going to do two things:

1) Drop the resistance load lower than the amp wants potentially causing an immediate kick into protection mode or amp damage (most likely the former but possibly the latter)

2) Drop the available power for each driver even lower.

I'd say, in a word, no.

 

[MrSwiss 10+ year member]

yes im aware of those possibilities. as it stand right now, ive hooked to of the aa mids up to a single channel, and they really move at half gain @ 2 ohms. thats when i decided to add 2 to each door and utilize all that power. then i further realized im gonna need a tweet to balance it out(y cant they make poly 6.5 coaxials haha).

its a power acoustik sl4-1000. im actually really surprised by this amp. its pushing 6 speakers right now, all at less than half gain.

 

[helotaxi 5,000+ posts]

If you have a passive crossover designed for a 2 ohm load on the low side and a 4 ohm load on the high side it will work just fine. The amp will never see less than 2 ohms and the mids will share the 2 ohm power and the tweet will get the full 4 ohm power. Crossovers divide frequencies, not power. The only time that speakers share power when wired on the same channel is when they are both playing the same freq.

 

[MrSwiss 10+ year member]

great! then that is my plan. i was sure i was going to need a crossover with 3 speakers on one channel.

now the question remains, where can i get this crossover?

and what do u suggest. 1 poly play 80-200hz, the other from 200-1000, and the tweet play the rest?

edit: err wait, passive decides all that for you

so basically im building a 3 way component set yes? should i still stick with the 2 aa poly mids and 1 tweet?

also ive been searching and ebay only has 1 page of returns. where can i find a xover that does what u suggested?

edit again : ok now i understand. i read the sticky in the speaker section. the mids are 4 ohm each, the tweet is 8 ohm. i can use 1 for midbass, the other for midrange, the tweets for highs(obviously), all on a passive crossover, and they would each be properly powered. very cool stuff!

 

[helotaxi 5,000+ posts]

With the poly mids I think that you would be best served by running a 2-way rather than a 3-way setup and using both mids for the same freq range.