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View Full Version : Multiple speakers on same channel of amp



KRN
01-06-2012, 11:38 PM
I was looking into replacing my 6.5" door speakers with 110 watts RMS 330 peak, adding a set of 4" speakers at 50 watts RMS 150 peak, and one tweeter somewhere up front as well at 50 watts RMS and 150 peak. With all that adding up to 210 watts RMS to each front door. All speakers are 4 ohm impedance. When I get the amp what would be the best way to wire them? Parallel or Series? What would the total ohms be in the end and would a 400 watt 2 channel amp be sufficient? I want the most sound I can get.

BnGRacing
01-07-2012, 03:31 AM
Those speakers do not add up to 210 RMS...they add up to zero. Speakers do not have watts and any power handling figures you come across should be taken with a grain of salt as most vendors rate their speakers differently from one another.

Your best bet is to source an outboard passive x-over designed for a 3-way system or use processing and a 6ch amp.

kramer_212
01-07-2012, 03:34 AM
Those speakers do not add up to 210 RMS...they add up to zero. Speakers do not have watts and any power handling figures you come across should be taken with a grain of salt as most vendors rate their speakers differently from one another.

Your best bet is to source an outboard passive x-over designed for a 3-way system or use processing and a 6ch amp.

this, because a chain is only as strong as its weakest link so to speak.

KRN
01-07-2012, 10:23 AM
what if i wire the 4" speaker and the tweeter together on one channel...since both are 50 watts rms, would a 100 watt channel powering these two be okay? my goal is to end up with a total of ten door speakers total, 3 on each front door and two in the back. just trying to figure out the best way to do this...

dbeez
01-07-2012, 10:38 AM
No no no

KRN
01-07-2012, 11:47 AM
What would be the best way to power this many speakers rated for different watts without having multiple amps..im just limited on space in my ext cab silverado since ive already got 2 p3l s10s under the back seat already

05fronty
01-07-2012, 11:50 AM
4 channel

KRN
01-07-2012, 12:21 PM
I thought a four channel wouldn't work because of the difference in speakers...I don't understand..if a channel is only as strongest as the weakest link why would two different speakers similar in power not work together on the same channel?

BnGRacing
01-07-2012, 02:28 PM
I thought a four channel wouldn't work because of the difference in speakers...I don't understand..if a channel is only as strongest as the weakest link why would two different speakers similar in power not work together on the same channel?

You need a 3-way passive crossover and a 2ch amp.

Rated power handling has absolutely nothing to do with it...or anything really.

KRN
01-07-2012, 09:50 PM
how do i determine my amps watt rating if i shouldnt pay attention to my speakers rms rating?

KRN
01-07-2012, 10:11 PM
and just checkin out a few 3-way passive crossovers too and the only ones im seeing use rca input and outputs...so i would need more amps? i know crossovers are usually after the amp pre speaker for some component speakers with tweeters to separate highs and lows but im not seeing a larger one for multiple speakers only preamp ones. any suggestions?

aztec
01-08-2012, 03:25 AM
your idea WILL not work.... you will need a passive x over, just buy component system with a x over,

but really read and study some more about this stuff, it will help you alot, not trying to be a @ss but it will help you..

go to diymobileaudio.com for more reading....

JoshC
01-08-2012, 03:31 AM
Do your homework before you buy anything, you should read most of the stickes on amps, wiring, and speakers



Check the site suggested above

phrostbyte0311
01-08-2012, 06:06 AM
Oh and btw, you should crossover BEFORE the amps in the signal chain NOT after.

zako
01-08-2012, 07:31 AM
I was looking into replacing my 6.5" door speakers with 110 watts RMS 330 peak, adding a set of 4" speakers at 50 watts RMS 150 peak, and one tweeter somewhere up front as well at 50 watts RMS and 150 peak. With all that adding up to 210 watts RMS to each front door. All speakers are 4 ohm impedance. When I get the amp what would be the best way to wire them? Parallel or Series? What would the total ohms be in the end and would a 400 watt 2 channel amp be sufficient? I want the most sound I can get.

First question is.. do you really need 10 speakers per door? There exist 2-way and 3-way speakers that will blow away anything you have heard before. Next issue is, the midbass, midrange, and tweeter, they are all designed to play different frequencies. A midbass speaker playing high enough frequencies may sound harsh to the ear. A tweeter playing low enough frequencies will simply blow up. So you need a device that separate the frequencies between speakers. This is what crossover boxes are about. The next issue is that your random midbass, midrange, and tweeters can have completely different sensitives. The (passive) crossover's second job is to match the levels of your speakers. Therefore do not listen the advice that you need to buy a passive crossover box separately. In a well designed speaker system, the crossover box is designed specially for a set of speakers it will be connected to. If you pick a random crossover box, it will probably will not sound good.

The second way of running multiple speakers is to use an _active_ crossover, which can be either digital or analog. It can be part of an aftermarket active crossover, processor, high end stereo, and some times part of an amplifier's pre-amp section. The active crossover splits the frequencies between channels _before_ the amplifier chain. In this case, the amplifiers will need to have a separate channel for each driver (e.g. for midbass, mid , and tweeter, you will need 3-channels per side).

And by the way, I hope your 6.5 is NOT a coaxial speaker. A coaxial speaker is a full range speaker that does not need help of any extra tweeters midranges, etc. What you want is a midrange or midbass woofer (something that's without its own tweeter) since you will be using a extra tweeter.

My advise to you is simply to buy a set of component speakers (together with their own crossover box). I personally wouldn't bother with 3-way if running passive and without advanced processing. A nice 2-way component set should run well enough. Skip the cheap mass brands. Look into Hertz, Focal, Hybrid Audio, Morel, etc. But if you really want a 3-way passive system, there certainly exist a few vendors that offer them. There were a couple of posts about them this past week.