PX300.4 Amp is in great condition. Information on the amp, and specs can be found here:
JBL PX300.4 (px3004) - 4-Channel Amplifiers - Sonic Electronix
Never had a problem with the amp, no protection lights or anything of the sort.
I also have the JBL GTO601.1II as well that have been powering two type S subs...perfect match. THIS AMP IS BROKEN. The amp comes on, makes a weird pop sound, and then turns back off, and it literally just keeps doing this over and over. I really dont think it is a big problem to fix... Hell it might even be the ground location I had it connected to, but I doubt it. This should be an easy fix for someone out there to get a good deal on 600w @ 2 ohms.
Specs can be found here:
GTO601.1II - JBL 600 Watt Mono Amplifier
Looking for $200 OBO shipped on the perfectly working 4 channel, and $80 shipped on the mono 600x1 amp. I will sell both for $250 shipped. The one amp retails for 349.99, and the other one 249.99. I have plenty of refs, and will send pics to whomever is interested. Thank you.