i Have a MRP-M850 Mono channel (http://www.alpine-europe.com/index.php?id=v-poweramplifiers&L=0,)
and i was wondering how do i know when im using 2 ohms and when i'm using 4 ohms. I dont get it can you help?
2007-12-03 11:18:35 · 5 answers · asked by Mike T 1 in Cars & Transportation ➔ Car Audio
The is dependant on how you wired your subs or speakers.
If parrell, add the resistance, if series divide in half.
2007-12-03 11:23:30 · answer #1 · answered by captsead0nkey 6 · 0⤊ 4⤋
If you're looking at the different power outputs of the amp that depend on how many ohms, it's referring to the ohms of your speakers. If your speakers measure 2 ohms, the amp puts out so much power. Less power into 4 or 8 ohms, because the fewer the ohms your speakers are, the more current they draw from the amp.
2007-12-03 19:41:45 · answer #2 · answered by Nomadd 7 · 0⤊ 0⤋
1 x 800W RMS @ 2ohms, 0.3% THD
1 x 500W RMS @ 4ohms, 0.08% THD
A 500 watt RMS , 4 ohm sub would be best.
The ohms of the sub is the load that goes on an amp. This load determines output power.
There is a trade off though, the lower the impedance (ohms) the more power is pushed as well as higher distortion (THD)
and more heat is generated. The excessive heat will shorten the life of the amp.
For best overall performance, it's far better to get a higher powered amp and load it with 4 ohms than a lower powered amp and force it to push more power with a lower impedance (2 or less ohms) load.
More info here http://spkrbox1.spaces.live.com
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captsead0nkey has it all backwards.
2007-12-03 20:14:18 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Here's a site that shows speaker configurations and they way they are wired to show how many ohms the amp is reading.
http://www.the12volt.com/caraudio/woofer_configurations.asp
All you do is click on the drop menus how many speakers and # of voice coils and ohms stated on the sub and it will show you the diagram of the configuration.
I hope this helps.
2007-12-03 19:48:40 · answer #4 · answered by John D 4 · 0⤊ 0⤋
Your question actually doesn't make sense. If you have TWO 8 ohm speakers (for example) and you connectc them in series, you get 16 ohms. (Rt=R1 + R2) If you have two speakers and you connect them in parallel, you get 4 ohms. (Rt =1/( (1/R1)+(1/R2)). If you use one by itself, you have 8 ohms.
It really depends on how you connect speakers to the amp.
What are you trying to do?
2007-12-03 19:28:44 · answer #5 · answered by tkquestion 7 · 0⤊ 0⤋