I am the Infinity Kappa 5.25" speakers all around, and they are 55w @ 4 ohm RMS. I want a 4 channel amp to power them. I shouldn't get an amp that is more than the 55w@ 4 ohm RMS, right? DOn't want to overpower the speakers and blow them? I am looking at a Audiobahn 50wx4 @ 4ohm amp, would this be a good decision? Thanks for any answers

 

There are a lot of really knowledgeable people on this forum, so I'm sure you'll get a ton of good suggestions. It also wouldn't hurt to call Crutchfield and ask, they have a great tech staff and you don't need to be an existing customer to ask a question. Just tell them you're looking for an amp (enter your speaker setup here) and they can give you some suggestions.

 

you can overpower them just not by too much. underpowered is worse since they'll be more distortion from raising the volume.

oh and why do u have such small front door speakers?

 

^^^ as long as the gain is set properly, underpowering them won't hurt them either.... it's just when people try to get greedy that stuff starts breaking...


That amp will work as long as all 4 speakers are 4 ohm each...

 

That amp will definately work. And you should filter out as much low bass information as you can, so you can turn up the volume without destroying your new speakers.

I don't want to confuse you here. Speakers can take ALOT more power than is advertised(within reason, everything has limits). While playing music only about 10% of your power is being used. So if you were looking at an amp that had 65watts/ch or 75watts/channel, and you really liked it better than the amp your looking at, you will still be safe. Just filter out the bass and use amplifier gain responsively-meaning that it isn't a volume ****. An audio shop should easily be able to properly set your gain for you. Even if you install everything else. Good luck!!

 

hey chris drop it on by i can help ya out.

 

With Infinity 6.5"s, they were too big for the Schoche spacers, and they hit the window

But I have to wait until the 1st to get the rear speakers, and the amp. If its safe I think I will probably get a more powerful amp, just turn down/off the bass on it and maybe even add some bass blockers. So Darren is a 4 channel amp install on your long list of offerings?

 

So the speakers I am going with will be (because I have the same ones up front):
http://cgi.ebay.com/ws/eBayISAPI.dll...MEWN%3AIT&rd=1
Specifications
MSRP U.S. $: $169.95 pair
Power Handling, RMS: 55 Watts
Power Handling, Peak: 165 Watts
Frequency Response (?3dB): 55Hz - 21kHz
Sensitivity: 90dB
Impedance: 4 Ohms
Mounting Depth: 2-1/16"


And the AMp would be something along the lines of....
http://cgi.ebay.com/AUDIOBAHN-A6004T...QQcmdZViewItem
Audiobahn A6004T 4 Channel Amp
Class A/B MOSFET Power Amplifier
2? Stable Stereo
Requlated Power Supply
Full MOSFET Circuitry
Double Sided Circuit Board
Air Induction Fan Cooled
RCA (Low Level) & Speaker (Hi Level) Inputs
RCA Outputs
Variable Hi Pass Crossover : 50Hz to 750Hz
Variable Low Pass Crossover : 50Hz to 120Hz
Variable Subsonic Filter : 20Hz to 50Hz
Signal To Noise Ratio : > 100dB
18dB Bass Boost
T.H.D. : 0.02%
2/3/4/5/6 Channel Operation (Mixed Mono)
Soft Start Circuitry
25A x 2 Fuses
Dimensions : 9-7/8"W x 1-7/8"H x 9-7/8"D
White Cloth Handling Gloves
Audiobahn Window Sticker
Frequency Response : 10Hz - 40KHz (+/- 1dB)
3-way Protection Circuitry: Thermal, Short Circuit and Overload; Cooling Fan
Cobalt Blue Illumination
High gloss Chrome Plated Finish
Nickel Plated Block Terminals
4? Stereo : 75W x 4
2? Stereo : 150W x 4
4? Mono : 300W x 2



Or would a http://cgi.ebay.com/AUDIOBAHN-A4004T...QQcmdZViewItem be safer? (A 50x4 at 4ohm Audiobahn amp)

ANy help is appreciated, I dont know much about the compatability of 4 channel amps with speakers

 

Also anyone know the name of the Adapters I will need for the rear? Was it the Scoche SAT 4?

 

Grime,

Are you going to use the dash speakers? You do know that the dash and front doors speakers are wired together! You could buy a 4 channel amp that is stable to 2 ohms and keep the front door and dash speakers wired together and the last 2 channels can run the rear. If the speakers handle 55RMS and 165 Peak than get a amp that has about the same numbers but not less on the RMS numbers , do not under power speaker due to distortion. Hope this helps


John

 

I have Infinity 4" loudspeakers in the dash, and I forgot about that.... Well since the amp is 75x4 at 4omhs, and 150x4 at 2ohms, would it be possible to wire the front door speakers and dash together to be 2 ohm stable, and use the other two channels at 4ohms to power the rear speakers?

 

OK if you're going with the amp you listed all the specs for that wouldn't be a bad idea. If you wanted to run the door speakers and the dash speakers on one channel (per side) you could. You would have to have sure that 1) the amp is stalble to 2 ohm's (and that one is) and that both speakers are 4 ohm's each. Running them in a parallel configuration would give you the ohm load you need (2 ohm's). Then you could run the rear at 4 ohm's. This would make the front slightly louder which is what you want anyway. Now since the amp has the option of running mixed mono you can take channel's 5 & 6, bridge them and run a sub.

Now here's what you want to do to set the volume. Before you install your amp turn your head unit up until is starts to distort then turn it back a few clicks. This helps you find the peak power the h/u can produce. Then install the amp and turn your h/u up to the max it was without the amp. Then go to your amp and set the crossover at about 50 or 60hz. Start turning your gain until you hear the speakers start to distort and turn it back a notch until it's clean. By this point it will more than likely be louder than you'll ever listen to it. Turn you H/U back down to a reasonable volume and you're set. This way you can never blow your speakers.

The really cool part about that amp you have listed is it have built in crossovers and a sub sonic filter. So you can cut off all the frequencies you cant here or the sub won't reproduce. This make the amp play more efficient.

If you have any question about what I've said here please feel free to ask.

 

josh_trdsparks, will said my friend. I could not have explained it better.


John

 

Very well said, I'm basically speachless.... That was great, thanks for the help!

 

No problem. Anytime.