I really liked what I've heard about long term reputation of the PPI and Crossfire amps.
Found out that the PPI P600.2 has a manufacturer spec rated high channel separation threshold of 37db, and then that the 900.4 (same line) was actually tested by a 3rd party to be even worse than that. So I ruled it out, although given how small and efficient it is, it could certainly be a great sub amp (since crosstalk won't matter).
I couldn't find anything out much about that newer Crossfire model. Whereas on the other hand, there's lots of talk on other car audio forums of the BA GT series. I ended up going with the smaller GT-275
instead since it's going under my seat and because of its price. Admittedly, I'm already spending enough on this build (I just bought the HU, too) with $200 in sound deadening materials (Audio Technix 60 mil Deadner
and RAAMaudio Ensolite IUO
) added to the items above.
So I'll run the front speakers with the GT-275, and hook up the JL Audios to the HU rear output so that they are there to use when people ride in the back seat.
Next step: try NOT to think about buying a sub and a monoblock amp for a few months. LOL
Your questions are answered: Speaker FAQ
Living room HT:
Energy RC-50, Ascend Sierra Horizon w/RAAL, Ascend Sierra 1, PSB Imagine XA | PSA V1500 and CHT SS 18.1 | Denon X4200W | modified Dayton SA1000
CBM-170 SE | SVS SB-1000 | Audio-GD NFB-11 | Parasound Zamp | JBL LSR305
Headphone & Portable
AKG K7XX | NAD HP50 | AKG K550 | Soundmagic E50 & E80 | DX50 | E12 | X1