I've had it since January 2013. Ordered from Sonic. I was building my first music system for my car and had the Pioneer DEH-15UB HU,
Pioneer 6 1/2 speakers in the front doors, Sony Xplot 6 X 9 speakers on the Rear Deck, the Alpine MRP-F300 4 ch amp and two 10" Sony
Xplod subwoofers in a sealed enclosure.
I was going through blogs and reviews about Voltage drop, headlight dimming, and the discharge of the main Battery when the Bass hits.
I was considering purchasing a capacitor because I wanted my music to sound great and was afraid of draining the main battery. My
neighbor had a two amp system with a 6 Farad capacitor in his car, and it looked great. He kept telling me that he usually spent
much time listening to music with the engine off and that he would never had a problem.
Going through the Sonic's webpage, I discovered the vast array of AGM batteries available and after some thinking I decided to try.
I purchased this BT-20 'cause of the price and I knew I did not have a 2000+ watt system. I took it to AutoZone for a pro
installation and they installed the battery in the trunk, in parallel with the main battery without an isolator.
The experience was great. My music sounded with an extra punch and I used to test the music at loud volume for extended periods and
it never discharged.
Today I'm using a 2 amp system. I'm still using the Pioneer DEH-15UB. In the front doors I have 6.5" mid woofers, the same 6 X 9
speakers on the Rear Deck. They are connected to the same Alpine V-Power 4 ch. Plus I'm using one of the 10" subs in a vented
enclosure on the floor behind the driver's seat, and it's connected to the Boss Phantom 1502MW Mono power amp. The two amps connected
to this BT-20 which is now located inside the car, hidden, beyond the area where the passenger rest their feet. I have everything
inside the car, the amplifiers under the seats.
I added the NVX BIR80 80 amp isolator. the experience is even better. The music sounds awesome. It's loud and clear, no distortion.
And I always push it, listening to music for 2 hours or so with the engine off. The 4 ch amp is rated at 300 watts RMS and the mono amp,
350 watt RMS when driving a single 4 ohm sub. That's pretty much the load I'm placing onto the BT-20.
I haven't actually measured the voltage when driving the two amps, but according to what I hear when I listen to music, it's all good. I
cannot say how long it takes to fully recharge it, but I've never had a problem.
I recommend this Shuriken BT-20. It works for me. It has never been fully discharged yet. It's driving my two power amplifiers well. The
music sounds great, with that extra punch. Plus the main battery draining is not a concern anymore, hehehe.