[chlngr1970]

And if I want to install a new head unit i have to rewire and bypass the amp??? Thanks!

I misread what you posted, sorry. If you are just replacing the HU, no. You don't have to bypass the amp. If you are replacing the SPEAKERS, you don't have to. If you use 2 ohm speakers, you are good to go. If you use 4 ohm speakers, you will lose some volume. This weekend, I'm replacing the speakers in my 03 'rango with Polk DXi 650s ( it's my GF truck ) and if I get enough in my paycheck, I'm picking up two of the Alpine KTP-445U amplifiers. The truck already has a Kenwood KDC-945U HU, a Kicker 10ZX400.1 sub amp, and a Polk DXi 104DVC sub in a ported box ( got a great deal on all that gear ) Unfortunately, she blew out the rf speaker.

I debated just swapping the fronts, and leaving the amp in place, then swapping out all 4 and leaving the stock amp, but decided I'll either swap all 4 and bypass the stock amp, or swap all 4 and put in the two Alpine mini amps bridged. I'll start a thread when I get home and get some work done to the 'rango...

j

 

[DTrow82]

Got it. Rewire for 4 ohm but not 2 ohm. I still haven't done it yet... I want a good clean all around sound at high volume with bass (obviously not sub sound). Would 2 ohm do this or would you reccomend putting in the work for 4 ohm? Thanks

 

[chlngr1970]

2 Ohm vs 4 Ohm isn't going to change how it sounds given all other things being equal. Ohm rating is how much power an amp will require at the resistance of the speaker to produce a set volume. You can run 8 Ohm speakers in your truck all day long, if you have enough amplifier to push it. Take the Alpine MRX-V70 amp for example. At 4 Ohms, it produces 60W RMS to 4 channels. At 2 Ohms, it produces 90W RMS to 4 channels. The lower the resistance of the speaker, the less power the amp needs to produce for the same volume ( someone please correct me if I am wrong on this :sorry: )

What I would do, is listen to the speakers. Chose the ones YOU like, then make that purchase based on what YOU like, and match an amp as close as you can to those speakers.

j

 

[TazRango]

Actually while the impedance of the speaker does not make a difference in loudness ([email protected] ohms is just as loud as [email protected] ohms), it does make a difference in sound quality. The higher the impedance, the more control the amp has over the movement of the speaker (and therefore the less distortion there will be).

 

[Thdavisz]

i have rockford fostgate speakers in my doors and they sound good, and have a decent amount of bass for door speakers and i dont have subs (yet), they sounded good on the stock headunit even with the stock amp in place but when i bypassed the amp and put in my sony head unit they got alot better

How did you bypass the amp? No