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In doing a search on this site, I see a lot of Match speaker and DSP upgrades.
However, when I did an online search I found out there is a company called PUZU that sells a plug and play DSP amp. They basically sell the same amp(s) with different T-harnesses for different car brands.
Pricing seems very reasonable. If you do an online search, Toyota and other car forums have tried it and seem to have good reviews.
I'm tempted to do this, but I already have another T-harness installed for my Linux carplay screen. In a chat with PUZU, they were not sure it is possible to add their DSP. I figure there shouldn't be a problem as long as I add their T-harness downstream from the head unit and Linux T-harness.
Another option I'm thinking of is just adding a powered under the seat subwoofer. I have already added tweeters with y-cables connected to the front 4" door speakers .
Here is Canadian pricing with free shipping:
Last edited by Valeoray; Sep 27, 2025 at 03:51 PM.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
