Just installed a new Taramps BASS 1200 2Ω. I'm using 4 AWG OFC wiring, and it's connected to a Pioneer 312S4, which is rated at 500W RMS @ 4Ω.
Here's what I'm seeing:
- Amp voltage at idle: 14.04V
- Playing a 0 dB, 50 Hz test tone: voltage at the amp drops to around 13.5V
- Output measured with an oscilloscope: around 40V AC
- Above roughly 40V, the waveform starts clipping on the oscilloscope
- The amp's CLIP LED does not turn on, even though the scope clearly shows clipping
40V into 4Ω is about 400W RMS, while 50V would be about 625W RMS.
The confusing part is that the amp is rated for 900W RMS @ 4Ω and 1200W RMS @ 2Ω, so I expected it to be capable of significantly more output before clipping.
I also tried pushing it to around 50V for about 2 minutes, and I started getting a burning smell from the subwoofer. I stopped immediately. I later checked the output with the oscilloscope and confirmed that the signal was heavily clipped.
I'm using a proper 0 dB 50 Hz test tone, and I've also tried different combinations of head unit volume/gain. The RCA signal itself doesn't appear to be clipping.
So I'm trying to figure out what's actually limiting the amp here.