Hi all

Totally new audiophile here! Recently got set up with a mid range turn table, and some second hand bits which includes a Marantz PM7003.

The amp is analogue and I’d like to wire in a receiver for TV, AirPlay, network audio, etc. I’ve been thinking about building a hifiberry. Does anyone have any experience with controlling an amp over the remote jacks?

What I want to be able to do is to stream audio over the hifiberry without having to turn the amp on and off every time. I was looking at the specs for the PM7003 and there is a remote control jack (D.BUS jack?) on the back. I’ve been doing some reading on software and jackd/jacks bus seems to pop up. Struggling to understand if this will allow me to power on and power off the PM7003 through that port on the back. Maybe someone has tackled this before or had a better solution?

Thanks in advance 🙏

  • thegarbz@alien.topBEnglish
    1·
    11 months ago

    The Marantz Dbus thing is proprietary so unless someone has reverse engineered it you’re out of luck.

    If you’re only interested in on/off your best option may be to wire up a rudimentary trigger to a GPIO port on the Raspberry Pi. Triggers are usually nothing more than a 12V output (though you’ll need to source the 12V from somewhere since the RPi runs on 5V).

    Then you could use a product like this https://www.audiophonics.fr/en/diy-kits-and-boards/audiophonics-trigger-12v-230v-slave-power-supply-device-p-10661.html or trigger based power board to turn the amp power on/off.

    You can get audio passthrough devices which detect an audio signal and make a 12V trigger as well if you don’t want to mess around with electronics. Then whenever you hit play on the hifiberry your amps will turn on without additional effort.

    Or you could put it all on a powerboard connected to a RF controlled outlet, and everything on and off the same time with a remote.