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Hey guys I have for the past year been riding around with my components in the doors with nothing to power them, so I figured this winter while its stored away I will finally get them powered. Anyway I have Vifa 7" mids, 4 ohms, 100wRMS, and Audax 1" tweets, 6 ohms, 50wRMS. I was wondering if I can wire the tweeters to 4 ohm or not? I was looking at getting the PG octane series R5.0:4 amp rated at 80wRMSx4 at 4 ohms, that way i figured it would be around 50-60 watts RMS. I need to stay on the somewhat cheap side for amps and JBL stopped making the amps I can afford. Any help would be great.
Thanks,
-Matt
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What are you looking to spend? I would HIGHLY recommend the Alpine MRV-F540. Rated at atleast 80W x 4RMS @4ohms Mine was 87w X 4RMS. You should be able to find one for around $300 or so.
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Well I was hoping less than 200, because I figured I would also get the Kenwood KEC600 crossover, but Im not sure if I need one or not?
Thanks,
-Matt
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I would say don't hassel with the X-over.. Assuming your Components already came with them. And the amp you get should also have a good crossover on it. So to get the best amp you can, I'd say drop the X-over from the equation.
2000 SVT Black/Tan #1633/2150 (a few mods)
Alpine: CDA-9835, MRV-F540, MRD-M550
PG: TANTRUM-X 6.5 COMP all around.
Some people wear Superman pajamas. Superman wears Chuck Norris pajamas.
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I bought them from parts express seperatly with no xovers. So that is why I figured I would add a xover into it, but if one is not necessary then I wont get one. Still not sure if I can drop 300 bones on an amp tho!
Thanks,
-Matt
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Plus can I wire the 6ohm tweeters to a 4 ohm load or no?
-Matt
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You'll definitely need some sort of crossover for the set (either passive or active) Check PE, they usually have cheaper sets of Passive crossovers that will work.
The tweeter being 6 ohm is no problem. Most tweeters are usually attenuated anyway so this being 6 ohm would work out the same as a passive crossover with a -3dB output for the tweeter.
Previous Owner of 00 SVT Contour #1077/2150 
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Originally posted by slvr98svt:
I bought them from parts express seperatly with no xovers. So that is why I figured I would add a xover into it, but if one is not necessary then I wont get one. Still not sure if I can drop 300 bones on an amp tho!
Thanks,
-Matt
You will need some kind of crossover (set to approximately 2500Hz) to send the correct frequencies to the drivers. The two easiest options are:
(1) Electronic (active) crossover like an Audiocontrol 2XS that will split the pre-amp frequencies. You'd then need a 4ch amp to power each driver.
Head Unit --> Active Crossover --> Amp --> Speakers
(2) Passive crossover that splits an amplified signal. You'd only need a 2ch amp to drive the components.
Head Unit --> Amp --> Passive Crossover --> Speakers
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From my experience with the Vifa 7" mids, they like a lot of power. I had originally powered them with 80w and it wasn't enough IMO. I now have 150w going to each component set and they handle it with ease (just be careful with the gains). You'll want to keep your tweeter at 6ohm like suggested above, so no worries there. I would suggest a crossover more in the 3000Hz range for the drivers you have. I had Madisound custom make some passive crossovers for me, but that may be too costly for you. If you are pwering each driver with a separate channel from the amp, then you can just use the amp crossovers. Btw, I love my set, once they get the right amount of power, they sing... 
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Path914, what kind of amp are you using? How much does Madi usually charge for some custom xover's? The tweeters say they can only handle 50w RMS so I didnt want to put to much power to them, I figured they could handle the 80w that the PG would put out.
-Matt
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Sorry about all the questions, but what would the best bang for the buck active crossover be for my system? Does anyone have any recomendations for 4 channel amps in the 150-200 dollar range to power this setup?
Thanks,
-Matt
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Originally posted by slvr98svt:
Sorry about all the questions, but what would the best bang for the buck active crossover be for my system? Does anyone have any recomendations for 4 channel amps in the 150-200 dollar range to power this setup?
Thanks,
-Matt
What I'd buy:
EQ - Audiocontrol 2XS (or equivalent) - eBay used < $50
4ch Amp - Lanzar OPTI200X4 - www.audioblowouts.com - $235
It's tough to find a good 4ch amp to put out a true 100+ watts into a 4ohm load in the < $200 range without going into the used market.
I too have the 7" Vifa PL's which are only getting maybe 80w, and they do seem a bit underpowered at that point. I'd love to hear them with 150w pushing them.
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That Pacific Gold amp you listed is actually a very good amplifier.
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Im talking about a Phoenix Gold amp. Thanks for the input guys.
-Matt
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Originally posted by slvr98svt:
Path914, what kind of amp are you using? How much does Madi usually charge for some custom xover's? The tweeters say they can only handle 50w RMS so I didnt want to put to much power to them, I figured they could handle the 80w that the PG would put out.
-Matt
I am using an Eclipse amp, model 3422 I believe. It puts out 150w x 2, with each channel going to a crossover, then split to the components. IIRC, Madisound charged a $30 design fee and $30 per crossover, so around $90 total. Not cheap, but at the time I knew absolutely nothing about crossovers and I wanted something designed specificaly to the speakers I had. You only need a 2 channel amp if you are going to use a passive x-over, so the tweets won't be getting the same amount of watts as the mids, so 100w-125w per side should be fine.
I have never used an active x-over, so I no suggestions regarding that.
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finding an amp for less than 200 that has internal xovers that will handle the mids and tweets will be tough. i had a ppi crossover and the kec crossover and sold them both. i wanted to cut down on the equipment to install. so i got ppi pcx amps. one for sub and the other (4channel) to run my mids and tweets in the front. the ppi has a good xover that lets u bandpass with enough range to cross the tweets properly. i dont see too many amps that do this. diamond does but i cant afford them. most just offer limited hi/lopass xovers.
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