Question:
i have 4 rockford fostgate subs stage one
2 10's
2 12's their all 8 ohms
now heres what i dont get
i have 2 amps to support these subs
a prologic 640 mosfet watts 2 channel amp idk any of the specs on it tho
and a audiobahn a2601q 2 channel amp
heres the specs on this one
150 watts RMS x 2 at 4 ohms
210 watts RMS x 2 at 2 ohms
420 watts RMS x 1 bridged output
stereo or bridged mono output
Tri-way capable (Tri-Way Crossover required)
MOSFET power supply
requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
high-pass (50-750 Hz)/low-pass (50-120 Hz) crossovers, 18 dB/octave
selectable 18 dB bass boost at 50 Hz
variable (20-50 Hz) subsonic filter
preamp outputs
cooling fan
cobalt blue illumination
digital voltmeter
12-3/4"W x 2-1/4"H x 11-5/8"D
1-year warranty
okay now how do i know about all the ohms like what does that have to do the more the better or the the less the better??
Answers:
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"Ohms" are a measure of electrical resistance.What is the loudest subwoofer system u have heard of?
In car stereos, this can be altered by hooking pairs of similar ohmage speakers to the same amp. Typically the lower the ohmage the louder the speaker since the wattage has less resistance holding it back, so to speak.
I installed a new car stereo and have to power it off separately after I turn off the ignition.?
The caveat is that when you lower the resistance, you can kill your amp if it cannot handle ohm levels that low.
If you have any big questions whether or not your amps can take the low ohms, or how to hook up a big system, and you do not have a fundamental understanding of electronic circuits, you should probably leave it to the professionals, or visit the library for more info.
How do you wire a cd player up using the wiring harness for a 98 civic lx?
Sorry I can't help you more, but I need to go pick up my fiance'!
"ohms" is the term used in the audio industry to define the load that an amplifier will see. it's not a very accurate word to use but the effect is the same. basically, it is a unit of resistance to current flow and current flow is proportional to power. the less resistance, the greater the current and the greater the power. you can connect your speakers to the amp in two ways: parallel or series. the way you do that will determine the load the amp "sees." your subs can have either one or two voice coils, and they could be 2, 4 or 8 ohms each coil. if there are two coils each sub at 8 ohms each, which i'm guessing just by the way rockford does their stuff, you can connect them in a combination of ways. the best way to hook them up will be they way that has the lowest "ohms." you can calculate them such:
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in series, you connect amp (+) to speaker1coil1 (+), speaker1coil1(-) to speaker1coil2(+), speaker1coil2(-) to speaker2coil1(+), speaker2coil1(-) to speaker2coil2(+) and speaker2coil2(-) to amp (-). in this case, the load is simply added one coil after another so 8+8+8+8=32ohms. don't do this one, it sucks. at that load, you might only get about 20WRMS (watts rms, i'll explain that later).
in parallel, the connection is just as simple but the math is a little more complicated. connect amp(+) to speaker1coil1(+) AND speaker1coil2(+) AND speaker2coil1(+) AND speaker 2coil2(+), then amp(-) to speaker1coil1(-) AND speaker1coil2(-) AND speaker2coil1(-) AND speaker2coil2(-'). easy. now the math to back it up:
How do i hook up a 4 channel amp to 2 speakers because i dont get it?
you add the inverses of all of the coils in parallel and take the inverse of the sum. easier than it sounds, especially if all your coils are the same.
How does a mono amp with 2 speaker inputs work?
1/8+1/8+1/8+1/8=1/x (x being the total resistance)
4/8=1/x (let's reduce this, it's easier)
1/2=1/x (now that's easy! since our numerator (the top number) is a one, we just have to flip it over to get the inverse)
Whats better, alpine SWR-1222 subs or the Alpine SWR-1242 subs?
2=x
this means that your amp will see a two ohm load, and put out somewhere in between 210 and 420 WRMS. i'm not sure of the actual value, because there was no published bridged output for 2 ohms only for 1 ohm. if you only have one voice coil per sub, the math remains the same. put 'em in parallel and you'll end up with 4 ohms and power at something less than you would have at 2 ohms. as far as subs are concerned, don't even bother with the stereo function. you'll get more power if you bridge, always, and when it comes to the frequency range of subs (anywhere from 5 to 200Hz) you can't tell where the sound is coming from anyways. select mono output, and bridge those babies down as low as your speakers can go and your amp can handle. sorry, buddy, shoulda got the 4-ohm versions of that sub. don't worry, though, if its too late to trade them in (which i highly reccommend). it will still sound great, and you may even encounter lower distortion levels. on to what the heck rms means.
What speakers are louder.. jbl or EV? i want louder like screaming not the bass?
defined, RMS is the "root mean squared" output of an amp. it is anywhere from .501 to .707 times the max output of the amp. simply put, RMS is the output that the amp will put out normally and continuously, vice the peak output which is usually so prominantly displayed on cheap crap. DO NOT EVER BASE YOUR DECISIONS OR SETTINGS ON PEAK OUTPUT! they are usually overrated, inaccurate, and the peak value vs. the RMS values of amps and speakers is often a very different ratio. any questions? email me.
2 ohms is less resistance than 4 ohms which allows more power to the speaker but too much will cause distortion or THD. The lower the THD the better the signal to your speaker(s). So you have to choose between more power or sound quality. Alpine is well known for both.
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