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Thank you for the supportive words! It actually helps a lot to stay motivated on a project this intense and time consuming. I hope to have some beta test units in about a month!

I ended up withdrawing my PCB order last night as I realized I wanted to make additional changes. I'm happy to report the redesign is done! Change Log: Upgraded from one to two DACs as I found a way to do it without going to a 6 layer PCB, so the added cost is incremental. This means that...

Unexpected but positive followup update: The PCB manufacturer rejected my design for a minor issue last night, and thankfully I had to wait until morning for them to set up a way to update the file, because overnight I had an aha moment that changes the design and would have rendered the PCB...

Exciting Update 3/31/26: PCB orders have been placed for the motherboard and both vehicle model daughterboards (Honda Civic XI with Bose, and Acura Integra DE4/DE5 with ELS)! There was a lot of fiddly stuff to address in the design in order to get a clean and reasonably-priced build. All SMD...

Appreciate the important question! It reminded me I should have addressed that in my prior post. So, the short version is, any DSP/amp that offers or includes an accessory remote control knob is likely to be compatible, with one caveat. Most DSP volume controls on the market are actually...

If I were to guess (and I am) that sounds more like an ANC (noise cancellation) issue. On aftermarket systems ANC should be excluded as the DSP doesn't know what to do with the additional signal. My device leaves those pins floating for this reason.

Ok folks, I spent probably 24 full hours this weekend working on an idea I had on Friday night (I couldn't sleep the whole night because of it). Here's a sort of list of evolutions that have happened, in order, which should hopefully give some context to the progression: I moved away from...

It won't be too long now! I'm estimating a shippable beta testing (but fully functional) product in about a month!

Accomplished some insane shi this weekend! This thing is becoming a true automotive grade, drop in device! Details to come tonight.

Thank you good sir!

BTW I know for sure this will work on Arc Audio amps that use the LRC-# remotes (since that's what I have). I'm fairly certain that Helix amps that use the URC-# remotes will also work, as they use plain potentiometers for volume control strategy as well.

I'm actually working on that too... requires some R&D and volunteers with various models and brands of DSP, and models of Civic/other Hondas. I'm a one man shop with a day job so this is my best speed. I wish I could go faster!

BTW this is going to require a full redesign of the PCB, and the enclosure will need to be larger overall. But I think that's a small price to pay for the integration, and since it can now be installed in place of the factory amp thanks to the T-harness, I don't think the additional size will...

Wiring Diagrams as requested! I included the "before" along with the "after" Keen eyes may have noticed that I decided last night to make this a totally plug-and-play affair, integrating the factory power source originally for the factory amplifier, to now power the Integrator Device...

Yeah, I'll get to that soon. Focus has been on product development first :)

SPDIF connections have been added to the board. Once I get the enclosure I will figure out the milling on the end plates to expose the connectors. To summarize, there will be three "connections" to this device: The main 8-pin harness (seen in the background in the first shot) which will take...

Quick update: I found a better PCB manufacturer to work with as well as settled on a different brand of enclosure which I have purchase a sample of. Parts should start coming in next week and i will begin assembling the production prototype. I also am thinking it might make sense to embed the...

I appreciate that! I have a remote volunteer for that already, so that's why I'm hoping to also find someone local in case I need to dive deeper and troubleshoot. Much harder to do that remotely. Thank you anyway though! If I end up needing a second remote volunteer I will def let you know.

Favor request #2: are there any CTR folks local to Northern Virginia who would be up for visiting me so I can test your system to see if the factory encoding scheme is the same across models?

Folks, do me a favor please. If you're following this thread with any interest at all, can you tell me what brand and model of DSP/amp you would want to integrate into your car? Oh, and what model, year and trim Honda you have too please. Thank you!