TomV Posted January 21, 2021 Share Posted January 21, 2021 (edited) I used to think the Revel ACM and Revel Amplifier/DSP units were connected via a USB cable. While the T-port connectors appear like standard USB, it's actually unshielded twisted pair wire that uses the A2B automotive audio bus by Analog Devices. A2B supports a 50MB high bandwidth digital bus with up to 32 channels. Looking at the circuit boards of the ACM and Amplifier/DSP I clearly see the AD241 chips. Audio Control Module (ACM) for Revel with HD Radio. Revel Amplifier/DSP for 14 and 20 channel systems Unshielded Twisted Pair cable connector that connects the ACM to the Amplifier/DSP unit Edited January 21, 2021 by TomV added pictures Quote Link to comment Share on other sites More sharing options...
TomV Posted January 21, 2021 Author Share Posted January 21, 2021 (edited) This fits in with the Revel aftermarket amplifier interface post I created earlier. The ZEN-A2B / DSP12A-A2B device is intended to completely eliminate the Revel Amplifier/DSP unit. Unfortunately, it's a solution for better sound that is a bit too involved/expensive for me. I also believe the Revel systems sound really good and only lack deep powerful bass from a subwoofer. What the market really needs is a simpler device that taps into the A2B signal and sends it out as variable output low level analog signal (RCA) before continuing on to the Revel Amplifier/DSP. I'm imagining a device with: 2 Inputs A2B (coming from ACM) Control (Power, CAN Hi, CAN Lo, Ground for variable output) 2 Outputs A2B (slave out to Revel Amplifier/DSP) RCA (unaltered audio signal to an aftermarket subwoofer amp) Something that looks like this device, but intended for Car Audio. Now we just need to find a company to manufacture one for us. This is the only way to get a "full" audio signal from the ACM that hasn't been altered with DSP and low frequency rolloff. Edited January 22, 2021 by TomV fixed picture of A2B Analyzer Quote Link to comment Share on other sites More sharing options...
TomV Posted January 22, 2021 Author Share Posted January 22, 2021 More development info for A2B interfacing, for those "companies" looking for evaluation and test equipment. ClockWorks A2B Products Quote Link to comment Share on other sites More sharing options...
Zondedo Posted February 17, 2021 Share Posted February 17, 2021 I’ve been into high end audio systems for car and home for years and agree with you regarding the engineering and sound quality provided by the Revel systems. I’ve got the Ultima system in my MKZ and really enjoy it. The low frequency extension is very good considering the type of speakers used. Personally I don’t see the need for an aftermarket subwoofer enclosure in the trunk to augment the Ultima system. Harmon International / Revel did their homework. Robert Iggy Cerami 1 Quote Link to comment Share on other sites More sharing options...
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