I am looking for a new amp. Here is a list of the amps I am looking at. Any opinions or suggestions. My front stage is Hertz Hks 6.5 Comps and I have a 12" sub that needs around 250-350 at 4 ohm. Thanks guys.

1. Hertz EP4
2. Arc Audio XXD 5080
3. DLS A5
4. JL Audio 450/4
5. Rainbow iPaul 4.300
6. Alpine PDX 5 ??????

 

I'm an Alpine guy... Here's what I would choose if money is not a concern, The Alpine PDX-1.600 for the sub woofer, it will give you 600 watts at 4 ohms. Plus the Alpine PDX-4.100 for the door speakers. It produces 100 watts per channel (4 speakers) at 4 ohms. Small foot print, low heat output, and stackable quality amps that will more than meet your needs...

 

I am wanting to run my system with 1 amp. That is why I am looking at the amps I listed. What are your ideas on running a system with one amp? why/why not. The pdx 5 is way less than buying two pdx's and has enough power for the sub. How efficient are the alpines? What is their THD? Thanks.

 

Regarding the Alpine PDX-5, CEA-2006 Power Rating: THD+N, S/N: 77dBA, for mono ch. 75W x 4 + 300W x 1.
RMS Power Ratings:
Per channel into 4 Ohms: (@ 14.4V Ƈ%THD+N, 20Hz - 20kHz @ 4I? for 4ch.) 75W x 4
Per channel into 2 Ohms: (@ 14.4V Ƈ%THD+N, 20Hz - 200Hz @ 2I? for Mono ch.) 300W x 1.
It is less expensive to go with a single amp, but having a two amp system delivers the power you are looking for while going with 4 ohms.

Here's is what I am running, Alpine MRP-M500 for my sub...
RMS Power Ratings:
Per channel into 4 Ohms: (@ 14.4V Ƈ%THD+N, 20Hz - 200Hz) 300W x 1
Per channel into 2 Ohms: (@ 14.4V Ƈ%THD+N, 20Hz - 200Hz) 500W x 1

Alpine MRA-F350 Digital 5-channel Surround Sound for the other speakers...
Bass Engine® features:
variable center-channel high-pass crossover (20-400 Hz in 1/3 octave steps, 6/12/18/24 dB per octave)
variable front left and right high-pass crossovers (20-200 Hz in 1/3 octave steps, 6/12/18/24 dB per octave)
variable rear left and right high-pass crossovers (20-200 Hz in 1/3 octave steps, 6/12/18/24 dB per octave)
sub channel preamp output (20-200 Hz low-pass filter, 6, 12, 18, or 24 dB/octave)
variable subsonic filter (20-50 Hz in 1/6 octave steps, 6/12/18/24 dB per octave)
subwoofer phase control (0/180 degrees)
time correction adjustment (0-20 mSec in 0.1 mSec increments)

THD at Rated RMS Power 1%
Signal to Noise Ratio 80 dB
This is cheaper than the PDX systems of amps...
Here is what it looks like...






This is coupled with the Alpine IVA-W505 HU, Alpine SPX REF 17 component speakers, Alpine SWS-1043D Sub Woofer, and the Alpine SBS-05DC in dash center channel speakers...

 

Can't go wrong with rainbow or arc. Really though you don't want to run the system on 1 amp. You want a class D for the subs and a class A for the components. If you have a supercrew those amps would do nice powering all 4 door speakers. Then just an additional amp for the sub.