This is a 12v system I built over lockdown this year. I used designs from other posts in the 12v section, big thanks for all the info!
I’ve had it out a fair bit over the summer, either on a bike trailer using one tham and a pa top, or using the full system with my 240v amp rack from another system.

I’m struggling to get my mini dsp (the t.racks DSP 4x4 Mini) to sound good. It makes horrible noises as soon as I turn it up loud. I don’t really understand how to set it up and have spent a long time fiddling with it without really getting anywhere. Even if I don’t change anything from the factory settings and play it without any crossover settings through a pa speaker the same thing happens.

Everything sounds perfect when I use either the 2 way crossover in the 12v amps or when I use my amp rack.

I’ve tried powering the dsp of a different power supply and the problem persists.

My setup is: audio into a Behringer 302 USB Xenyx Mixer (as it’s lightweight and usb powered), then through a Behringer MICROHD Hum Destroyer HD400 and into the mini-dsp. From the dsp into Pioneer GM-D8704 and a Juice Car Audio JA1504 (1500w).

The Thams are loaded with RCF LF12G301 (12" 450W 8 Ohm).

Mids are Beyma SM110/N (10" 200W 8 Ohm) and horns are P-Audio BM-D26 Mk2 (30W 1" Throat Compression Driver).

I'm having trouble uploading images but you can see the system on: http://https://www.instagram.com/compaktsystem/ - http://https://www.instagram.com/compaktsoundsystem/