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View Full Version : connecting subwoofer to a 2 channel amp



inspire
12-09-2002, 12:17 AM
how do i do it?? do i connect it to R- and R+ or L- and L+ or a combo?? help?

Ekliptix
12-09-2002, 12:20 AM
How many ohms can you run the amp? how many ohms are your speakers rated at? This will decide if you can run parrallel or not.

D'z Nutz
12-09-2002, 12:26 AM
Bridge it instead....

Ekliptix
12-09-2002, 12:30 AM
yea, oops

inspire
12-09-2002, 12:31 AM
how do i bridge the amp?? is there a button on the amp or do i do this using the deck?

D'z Nutz
12-09-2002, 12:33 AM
You'll have to read the manual on that one.... It's either use R- and L+, or R+ and L-. Basically it involves using on polarity on each channel. Make sure your amp is bridgeable.

Ekliptix
12-09-2002, 12:35 AM
It is possible when hooking up more then one speaker to an amp. wiring them in parallel or series makes the difference. Series = more power + harder on the amp.

inspire
12-09-2002, 12:44 AM
ok i found out, its L- and R+, do i put the amp onto High Pass. Low pass, or OFF??
and what should i set the subwoofer crossover frequency to?

Ekliptix
12-09-2002, 12:48 AM
Carefull not to run it at too low a load(ohms).

freq? what size is it? box spec?

inspire
12-09-2002, 12:56 AM
10" JL 10W3, and it is a ported box....umm...i dont remember the specs....

Ekliptix
12-09-2002, 01:05 AM
I'd say set the freq to 60hz. play around w/ it though.

redline_13000
12-09-2002, 01:48 AM
low pass

Scott
12-09-2002, 02:03 AM
Originally posted by inspire
ok i found out, its L- and R+, do i put the amp onto High Pass. Low pass, or OFF??
and what should i set the subwoofer crossover frequency to?

After that display of lack of knowlege, I recommend your nearest stereo shop does the setup for you :rofl:

inspire
12-09-2002, 02:10 AM
well...i am here on a forum seeking answers to my questions. I am hoping to learn about things from people who are knowledgable in this field. I want to be able to learn what all the controls do. I am glad there are people like D'z nuts who are actually here to help people in my position instead of people like you who arent helping me in any way at all

Scott
12-09-2002, 02:14 AM
Sorry if i was a bit harsh, I would just hate to see you hook it all up and then put it in high pass and fry the sub. Not tryin to be rude.

D'z Nutz
12-09-2002, 12:40 PM
Originally posted by Scott
Sorry if i was a bit harsh, I would just hate to see you hook it all up and then put it in high pass and fry the sub. Not tryin to be rude.

Of course, you could've just told him the difference :)

Basically the difference between low pass and high pass is the frequency the amp is allowed to output to the speaker. Since subwoofers play lower frequencies, the low pass would filter out any higher frequencies the woofer wouldn't be able to play anyways (which could even damage the sub, as Scott mentioned). Similarily, the high pass filters out the lower frequencies and is usually used for speakers, such as components, coaxials, etc.

inspire
12-09-2002, 07:02 PM
everything is working good now! thx guys! but my amp isnt powerful enough!! it is a Phoenix Gold QX2180, 180 watts when i bridge it!!! my amp isnt giving enough power to my JL 10w3, can anyone recommend an amp that will power this adequately? for around 200??

Weapon_R
12-09-2002, 07:37 PM
That is probably not going to power that sub and speakers (If you still have them wired too). Get yourself another sub. With xmas and boxing day coming up, you should be able to get a lower end amp for about $200.

inspire
12-10-2002, 01:30 AM
it is just powering my sub now....