Ppi fanatics

[vroomy 10+ year member]

2ohm mono?! Wont it blow up at that impedance?

 

[audiobaun 5,000+ posts]

2ohm mono?! Wont it blow up at that impedance?

It could very well blow up man.But I did run an A600.2 @ 2 ohms mono/bridged back in the 90s, but i kept the gain down and had it raised to keep it as cool as possible and did fine for over a year on a Pair of SVC 4 ohm Still Water Kicker 10s.I later replaced with an Autotek Mean Machine 99 of which I still have today and use.Its better to stay at 4 ohms mono /Bridged..Safer on that amp to be honest, but will do and run fine @8 ohms at approx 1/2 of the 4 ohm rms rating.I apologize.. I shouldnt put you at risking your amps capabilities,as I did mine.I always took chances, as i did with my 1st Hifonics VII Cyclops and tried it at 2 ohm mono, and stated nothing lower than 4 ohms/rated, but it did run at 2 ohm mono , and threw eybrows back at a shop I was working part time in back in the early 89-91,and I went on to take even more chances, as experimenting was what I did and enjoyed such as that Autotek BTS 7050/44 watts,that I also took a chance and ran 2 ohm bridged/mono and ran 4/12s and still functions today just fine.

 

[vroomy 10+ year member]

So update. Im thinking of switching to a zapco c2k 6.0, specs say ok at 2ohm bridged for 1200watts. Good move or bad? Not familiar with zapco. Are they as good as ppi?

 

[Boomin_tahoe 5,000+ posts]

So this is from my car audio brochure stash which I have kept over the course of the years. Hope this clears up any confusion....

 

[vroomy 10+ year member]

Thats a very cool brochure indeed

 

[vroomy 10+ year member]

Makes me want to stay with my ppi haha

 

[Boomin_tahoe 5,000+ posts]

Only bad thing about o/s amps is they can only run 2 ohms/4 ohms mono. Unlike today's amps, some can do 1 ohm no problem.

I have tons of other brochures from diff brands.

 

[PPI_GUY 10+ year member]

Do NOT run that amp at 2 ohm mono/bridged. It wasn't designed for that type load. just because it may survive for a while doesn't mean it's a good idea. Look at the specs posted in the brochure pic above. The amp was designed to make rated power into low VOLTAGES not low impedances. The amp isn't a so-called "cheater" from back in the day. Most PPI amps weren't. Old school class a/b amps are terribly inefficient anyway. Asking them to perform at loads beyond their design only compounds the problem and stresses the power supply.

OP, run that amp at 2/4 ohm stereo or 4 ohm mono/bridged and you'll be good. Run it at 8 ohm and you'll never have a problem.

If you want to run at 2 ohm mono/bridged (same as 1 ohm stereo) or lower, just pickup a modern budget class D amp.