Let me start with my apologies, because I know these threads are fairly common, but here’s another. I recently had some upgrades installed in my boat.
Kicker KXMA 800.8 running 6 Wetsound 6.5s and a JL IB10”
Kicker KXMA 1200.1 running 2 12W6v3s @ 1 ohm
Battery is a XS XP3000
Each amplifier has its own dedicated Stinger 4 gauge for power and ground. From the battery to the amp it goes battery-perko switch-Stinger 150A fuse-amp
When I just start getting the volume right to where it’s almost max, the 1200.1 is hitting voltage cutoff, so I took some measurements.
Battery at rest is showing 12.9V
With the key off (ie.... no power to amp) voltage at the amplifier is 12.9V
With everything on and the volume high enough to cut the amp off.....
Battery - 12.4-12.5V
Out of the Perko 12.4-12.5V
Out of the 150A fuse 12.4-12.5V
Into the amplifier 11.2-11.4V
I’d estimate between the fuse and the amplifier is 12’-14’ of 4 gauge and no splices. The installer claims the KXMA1200.1 just isn’t enough for the 12W6s, and Kicker tech support says it’s a wiring install issue. Both the installer and Kicker agree that the 1200.1 having a dedicate 4 gauge with the length of the run, is sufficient. There’s never an issue at lower volumes, or if I turn the gain down on the amp a few clicks, so it’s strictly predicated on the draw of the sub amp. So what’s happening between the fuse and amp, that I’m getting over a 1 volt drop? The installer and the manufacturer will just continue to blame each other, so I’d like a 3rd party opinion so maybe I can actually fix it. Thanks in advance.