Volfenhag ZX-HYPERCAP2.2 (Silver)

Really, these either work or don't. They are like a wire or switch in that regard. This does indeed work, and has improved my bass response and don't have the dimming headlights issue anymore.
I'm pushing 2 Alpine Type E off a Sony 1000 watt amp.Bass does hit harder Car doesn't act like the battery is dying. Quick and easy installation. Did all the prep while installing a new head unit.

Good cap at a good price, does its job, looks great, and never had a problem with it.

I have a manual chevy s10. When I would be in nuetral the headlights would dim as well as me being in fifth. Figured this would do the trick from the other reviews. It fix the dim in fifth and the lights still dim a little when in neutral (probably need a new batt). Too my surprise, my amp gives more power to my sub and I feel more confident in the protection of my gear as well. I'm very happy with this purchase but if I were to go back I probably would have spent more.

I have had this cap for a few weeks and i love in, i am running a kenwood 1800 watt amp and the cap powers it good with no dim to my lights. i would recommend this cap to anyone

it does what it says it would do