CPBK2

Bought this to stiffen up the voltage on my sub amp and the difference is honestly noticeable on hard bass hits. The low ESR really shows, my lights don't dim like they used to. Haven't triggered the reverse polarity warning yet, which is probably a good thing.

Wired this into my car audio setup and the difference is immediate — headlights don't dim on hard bass hits anymore. The super bright LED display is genuinely useful for keeping an eye on voltage without pulling out a meter.

The reverse polarity warning already saved me once when I swapped the leads by mistake. 2 farads holds my sub amp steady on hard hits, and the ESR is low enough that I don't get any dimming.