The concept would be to switch the Front Left and Front Right (+ and ground) speaker inputs from the stereo to a leisure “home” amplifier that’s powered from my leisure battery.
From reading up, it is not a good idea to wire 2 amps in series as when one is driving the other will be receiving its outputs and visa versa. I also cannot switch to power the head unit from the leisure battery due to canbus issues.
My concept is shown below. 2 channel (2x positive and 2x ground) output 30w Bluetooth leisure amp, feeds into a 4 pole double throw (4PDT) switch that switches the 2 channels between the stereo and the leisure amp.
I think a relay could do this automatically. I just need to find a reliable 12v ignition source and ground for the relay to switch from its resting state (leisure amp) to the relay activated with ignition on (car stereo)
Although I have basic wiring knowledge from the leisure battery system installation I have done, this is a little beyond me. My unknowns are:
- Where to source 12v ignition input (piggybag fuse from below steering wheel fuse box?)
- Where to ground? Can I use the radio? - I don’t want to mess with canbus!
- Can a 4PDT relay pass through reasonable quality audio, do I need to find a certain ampage rating to deal with amplified audio signals
- This will involve cutting into the stereo out cables so I don’t want to cause any irreversible issues.
Thanks for the help! This should be in the electrical forum but I’ve been on hold waiting for access to the full forum for a good few weeks now.
I just found this on AliExpress: ￡17.88 | Herdio Home Power Amplifiers Audio Bluetooth Aux Mini Amplifier For Bathroom Wall Ceiling Music Speakers EU/US/UK/AU plug
https://a.aliexpress.com/_EGoyxrc
I just found this on AliExpress: ￡2.44 | Small Electromagnetic Relay MY4NJ AC 110V 220V DC 24V 12V Coil Relay Module with Base Socket 4PDT 14 Pin Silver plated contact
https://a.aliexpress.com/_EHtyaEQ
