PAC TR-4

Added subs and an amp to my 2011 mustang with the shaker 500 system. This unit let me use the factory amp 5v turn-on and gives my sub amp the 12v turn-on it needs. Been in for 6 months with no problems whatsoever.

I bought this for use with my Kenwood KAC-1502S amplifier in my Tacoma pickup truck to power two 8-ohm subwoofers. The power antenna lead coming from my cheap after-market (VR3) head unit would not trigger the amplifier by itself. It turned out that it would not trigger the PAC TR-4 either. So, I connected one of the subwoofer speaker wires to the input of the PAC TR-4. It has enough power to trigger the PAC TR-4. The one con that I see is that with it wired this way the amplifier is always on, even when I turn off the subwoofer at the head unit. It is off when the head unit switch is turned off. I don't understand it, but it works.



I'm not interested in SPLs or the modern type of music that is meant to shake the entire neighborhood. I just wanted to enhance the bass of my factory speakers on classic rock and classical music, so I don't push a lot of power through the system. I was a little annoyed that I need the PAC TR-4 in the first place, but I guess that's what I get for buying the cheapest head unit with USB input that I could find. The PAC TR-4 has worked flawlessly and didn't cost much.

I bought this item for my Pioneer Z130 BT because the unit does not come with wireless remote capabilities and PAC-TR-4 solved that problem, installation was easy and in a couple of minutes it was installed and working as it should, great product.

If you plan on put more than just a amp in your car I would use this its very easy to install and gets the job done.

Bought this product to stop turn-on/off thump from my amp. It didn't completely fix the problem but it did help drastically. Its either this or a new amp but i like my mono block so im sticking to this.

easy to install, small and versatile. would definately recommend.