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| Originally posted by EcianIce@Apr 20 2005, 08:41 PM |
i've recently added a mono amp for my subs and this really doesn't make sense.
i have 2 12" W3v2 subs from JL - 300W rms 4ohm each. i took my multimeter to the pos . neg terminals on the sub enclosure and they -both- ohm out at 4.
the JL 500/5 amp they were running on is 250W max on a single channel.
i bought an Alpine MRD-M605 rated 600W rms @ 2ohm and 400W rms @ 4ohm.
i set everything up last night and the new amp can't even get close to the original power / sound of the 500/5. i don't understand it at all. i even jacked up the amp output signal to +16db and the head unit to +4 .. it sounds like shit but it was finally back as loud as before. =0
someone have ANY idea whats wrong here?
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| Originally posted by EcianIce@Apr 21 2005, 05:18 AM |
but if im putting 4ohms from the subs, to the amp. i -should- be getting 400rms. if i knocked it down to 2ohms it'd be 600rms. so according to what you said it should work exactly how it's setup right now. =0
i think i'll run it by a sound shop later today.
| Originally posted by EcianIce@Apr 22 2005, 07:55 PM |
so i went to the shop today. this is so messed up.
at the connectors in for the enclosure im getting 8ohms. =0
the 250W channel is pushing through 8ohms like nothing. amazing. JL ftw.
but yea .. we took each sub out and were going to make sure it was in parellel and we found out that i have a blown voice coil on 1 and for some reason another coil ohms out at 60 or so. but they still work fine.
the guys at the shop had no idea what to think of it and all i got was a reccomendation that i start all over for subs and buy new.
guy: "W7's .. thoes are like the bad boy JL's aren't they?"
me: "yea, their highest rated sub"
guy: "if you go with that i'd reccomend only 1 12" in a ported box, otherwise if it's sealed that sub will blow the sides off it."
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