* A Kenwood KDC-MP342U Head unit

* 1 Rockford Fosgate P1S412 in a Bassworx - 12" Single Ported Subwoofer Enclosure

* A pair of Infinity Reference 6020cs 6x1/2"

* A Pair of Infinity Reference 9622i 6x9

* 1 Lanzar Vibe 240 Amp( got it for free)


Now i am going to need another amplifier because i want to connect the speakers to amps as well as the sub.

My question is should i buy a amp for the subwoofer and just use the lanzar to amplify the speakers or the other way around? And any recommendations on an amp?

The rating on the sub is 50-150 watts RMS.

I would appreciate any help i can get
thanks Honda-tech

 

yep youll need another amp.... and honestly i wouldnt use the one you have now, its not alot of power.
do you know how many watts the amp is rms??
i would get a amp for the speakers that match the rms power.

 

I feel the same way. And even the amp he has now is overpowering his sub by at least 50 watts RMS (the amp is rated at 200 watts RMS @ 4 ohms)

Get another amp. Your HU could possibly be used to drive your speakers, but you may need a couple wire harnesses to do that. Be careful, though as the HU is underpowering the speakers and if you play your music too loud, you could send your HU into constant clipping, which destroys VC's on 6x9's and subs.

 

The speakers are rated at 75w rms each so if i want to reach that i would assume i need an amp.

also if the amp is rated 50w rms over the sub. is that a problem?

thanks for the reply

 

It may not be that significant in your case, but if your overpower your sub, you can overheat the VC and burn it out. This can be understood by the simple fact that if you plug a 12" sub rated at 500W RMS directly into the wall socket in your house, if you don't blow a fuse first you will blow the VC on your sub.

 

Use the amp you have for the sub, your much better off being over-powered then under-powered or even exact power, it will give you "dynamic headroom", [ability to produce loud passages without clipping the amp] the subs continuous power handling, [RMS] wattage is 150W the peak will be around 300W, it will easley handle the 200W RMS into 4 ohms amp, just make sure you adjust the amps gain properly.

Find a 4x45-50W RMS into 4 ohms amp, your speakers are 90W and 100W continuous and have 2 ohm VC.

I would also suggest you wire the rear speakers in series and connect the bridged rear channels of the 4ch amp for a mono rear fill, I would also suggest you disable the tweeters on the 6x9s, high frequencies behind you will only mess up the staging and imaging of your system. 94

 

hey appreciate all the help
i ended up buying a mono amp for the sub

but i have another question

the HU has 2 preamp outputs.
is it possibble to put a y-cable on one of the outputs so i can amplify the front and rear speakers?

 

If you want to amp both the front and rear speakers you will need a 4ch amp, most 4ch amps will have a "Y adapter" built in so only one set of RCA inputs is needed.

Or, because the rear speakers are for rear fill only, use HU power, [rear speaker outputs] for the rear speakers and use the 2ch amp for the front speakers. 94

 

I'm assuming you are using one of the sets of preouts for the sub. If I'm correct, then you would only have front channel audio anyway. What fcm said is true, but in case you can't find a 4-channel amp with the built-in Y-adapter, then yes, it is possible to use one.

 

^ well there are 2 sets of preamp outs on the back of the HU like this Picture One set will be going to my subwoofer the other i want to run to a 4 channel amp for the fron and rear speakers.

but do i have to add the y adapter on the HU or on the Amp?

 

^ Well, it doesn't really matter where in the scheme of things you add it as long as your amp is sending signal to both your front and rear speakers. It might look better and save the cost of an additional set of RCA cables if you add it to the amp and just plug the cables from the HU into the adapter, but in the end it will acheive the same effect.

Just make sure that if you add it to the amp it is a F-M adapter or if you add it to the HU it is a M-F adapter so you can plug your cables into it without some more adapters or splicing wires.

 

Save yourself the problem of "Y" adapters by making sure the amp you get has a "paralleling" switch, ["Y" adapter built in] there are very few 4ch amps that do not, so it will not be hard to find one in your price and power range. 94