The Volvo service center finally told us the ring replacement would cost almost as much as engine replacement. Volvo North America a first considered paying half the cost but then decided the car was "too far out of warranty". Be aware. Major engine work means engine replacement. air filter replacements

None . .

I have used many different amps like kenwood, alpine, pyle, and lanzar they were all 300watts rms, they dont even come close to IX404 in power and sound quality. Greensboro truck repair company

None . .

It sounded good when it was working, as long as it was with 4 ohms speakers.

Overheats.
Problems when pushing low impedances.
Unreliable.

My Studio 100 sounded much better. First Zapco I ever had that overheated. Problems when pushing low impedances. Blew a channel twice until I decided not to fix it anymore. When I opened it up I found out why:in order to make a cheaper amp, ZAPCO cut the number of output devices.

Similar Products Used:

Zapco Studio 100, 300, Xtant M404, JL 300/4, Denon.

small size, very underrated in power. Crystal clear sound.

power and ground screws are too small, they make you use a ring terminal.

Simply the best amp that I have used bar none. I dont know why I waited so long to try the Zapco products. It even make the JL amp in my truck sound lame. Such a clean clear tight sound that I could be happier.

Similar Products Used:

JL Audio, Rockford Fosgate, PPI, Xtant

cheap price

fuse voltage, overheating, rms is low

This is the worst amplifier that Zapco has made, it must be because it was the first amplifier made since the owner/creator of Zapco sold the business and went on to create Arc Audio.

Similar Products Used:

Arc Audio arc4050, Zapco c2k-9.0x