Simple sub questions, component specific
#1
Simple sub questions, component specific
I just bought a pair of 1020W Infinity Subs. Awesome subs, but I want an amp to match. I want to buy an Alpine amp to match my deck (CDA7893). I was looking at buying the MRV-T420, which pumps out 600 watts into one channel. I know these subs can handle 1000 watts each, but how does bridging them change their power handling? And how is impedence altered when bridging two subs together? And for absolute SPL and sound quality, is having both subs powered individually better, or will bridging them work? Thanks!
#2
First of all you do NOT bridge speakers. Bridging is a function of amplifiers. Speakers get wired either in series, parallel or a combination of the two called series/parallel.
Connecting them in parallel doubles the amount of power you can send to them. If one can handle 1000W then 2 in parallel can handle 2000W.
Connecting two 8ohm subs in parallel creates a 4ohm load. Two 4ohm subs in parallel creates a 2ohm load. Go to www.jlaudio.com and read their "Tutorials" to learn more about wiring your subs together.
For SPL, the more cone area you have the better. The more air you move the louder it will be.
Connecting them in parallel doubles the amount of power you can send to them. If one can handle 1000W then 2 in parallel can handle 2000W.
Connecting two 8ohm subs in parallel creates a 4ohm load. Two 4ohm subs in parallel creates a 2ohm load. Go to www.jlaudio.com and read their "Tutorials" to learn more about wiring your subs together.
For SPL, the more cone area you have the better. The more air you move the louder it will be.
#4
Good point. I was thinking more along the lines of two 1000W subs in parallel. If it's a single sub with dual VC's it makes no difference whether they are wired parallel or series. The power handling stays the same.
#5
ohh, ok, i just noticed the fact that him and you were talking about 2 subs. I just wanted him to be careful how much power he sends to them, cuase i have blown 4 and i know alot of ppl that have also blown them with not all that much power.
#7
PS, I should have worded my original question a little better. I wanted to know if running the subs in parallel with a bridged amp would be louder than running them in as two seperate channels on the same amp, but not bridged (2 ch).
#8
it depends on the amp you get, with 2 dvc 4 ohm subs id suggest running them either 4 ohm mono or 1 ohm mono either on a 1 or 2 channel amp.
most any amp you get can handle 4 ohm mono except theres a few that will still get hot like most RF amps do.
also if you run them at 1 ohm, you tend to get a higher s/n ratio, but if you get a good amp, its usually inaudible.
most any amp you get can handle 4 ohm mono except theres a few that will still get hot like most RF amps do.
also if you run them at 1 ohm, you tend to get a higher s/n ratio, but if you get a good amp, its usually inaudible.
#9
What's the impedance of your subs? DVC or SVC?
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'96 Firebird Formula M6
Performance
Custom cut-out, Homemade 4" CAI with 9" cone filter, !CAGS, TB Bypass, Manual fan switch, Energy Suspension Trans. Mount, Taylor 8mm Wires, Pro 5.0 shifter, LCAs, Stock 3.42 gears
Stereo
Sony Xplod MP450X MP3 Headunit, Sony XE-90MKII Half DIN EQ, MTX RTX01A Crossover, 2 12" Clarions, powered by 2 Bridged Kenwood KAC-728S amps, Infinity Reference Series component set up front, powered by Kenwood KAC-628, EFX 1 farad cap, 4 gauge wire to cap, 10 gauge to amps
Pic
------------------
'96 Firebird Formula M6
Performance
Custom cut-out, Homemade 4" CAI with 9" cone filter, !CAGS, TB Bypass, Manual fan switch, Energy Suspension Trans. Mount, Taylor 8mm Wires, Pro 5.0 shifter, LCAs, Stock 3.42 gears
Stereo
Sony Xplod MP450X MP3 Headunit, Sony XE-90MKII Half DIN EQ, MTX RTX01A Crossover, 2 12" Clarions, powered by 2 Bridged Kenwood KAC-728S amps, Infinity Reference Series component set up front, powered by Kenwood KAC-628, EFX 1 farad cap, 4 gauge wire to cap, 10 gauge to amps
Pic
#11
Your best option would be to wire the VC's of each sub in series to make them each 8ohms and then wiring the now 8ohm subs in parallel for a (amplifier friendly) final 4ohm load.
If you were to wire your subs for a final 1ohm load you're gonna have to shell out a lot more coin for an amp that can handle a load that small. And you would have to mount the amp somewhere where it can get lots of air circulating around it to help keep it cool.
If you were to wire your subs for a final 1ohm load you're gonna have to shell out a lot more coin for an amp that can handle a load that small. And you would have to mount the amp somewhere where it can get lots of air circulating around it to help keep it cool.
#13
IMO go for a class D amp and wire your subs for a 1 ohm load. I think you'll probably end up spending more money on a class a/b amp that will put out good power at 4 ohms and it will be harder on the cars electrical system.
I'd recommend the JBL 600.1. It will put out over 600W RMS at 1 ohm and can be found online for about $180US last I checked. The only feature it's lacking is a subsonic filter but I assume you'll be using a sealed box so that won't matter.
------------------
'96 Firebird Formula M6
Performance
Custom cut-out, Homemade 4" CAI with 9" cone filter, !CAGS, TB Bypass, Manual fan switch, Energy Suspension Trans. Mount, Taylor 8mm Wires, Pro 5.0 shifter, LCAs, Stock 3.42 gears
Stereo
Sony Xplod MP450X MP3 Headunit, Sony XE-90MKII Half DIN EQ, MTX RTX01A Crossover, 2 12" Clarions, powered by 2 Bridged Kenwood KAC-728S amps, Infinity Reference Series component set up front, powered by Kenwood KAC-628, EFX 1 farad cap, 4 gauge wire to cap, 10 gauge to amps
Pic
I'd recommend the JBL 600.1. It will put out over 600W RMS at 1 ohm and can be found online for about $180US last I checked. The only feature it's lacking is a subsonic filter but I assume you'll be using a sealed box so that won't matter.
------------------
'96 Firebird Formula M6
Performance
Custom cut-out, Homemade 4" CAI with 9" cone filter, !CAGS, TB Bypass, Manual fan switch, Energy Suspension Trans. Mount, Taylor 8mm Wires, Pro 5.0 shifter, LCAs, Stock 3.42 gears
Stereo
Sony Xplod MP450X MP3 Headunit, Sony XE-90MKII Half DIN EQ, MTX RTX01A Crossover, 2 12" Clarions, powered by 2 Bridged Kenwood KAC-728S amps, Infinity Reference Series component set up front, powered by Kenwood KAC-628, EFX 1 farad cap, 4 gauge wire to cap, 10 gauge to amps
Pic
#14
i cant suggest against RF enough, those jbl amps are good and clean, but they too get alittle warm at 1 ohm, but you can try to get 2 300.1 and do 2 ohm per amp, which shouldnt be a problem on the electrical system.
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