planning stage: Help with amplifier for a carputer

[relefat]

Hello, I am in the process of preplanning what parts I need for my carputer project. I know HATs are non-stackable but then again if they don't really use the same pins, there should be no problems, right? So my plan is to put a 4G/LTE addon board, it has the following pinout:

https://www.waveshare.com/w/upload/4/45 ... nition.png


The obvious question is what amp can you recommend so it does not cause any conflicts with the LTE board? The speakers I am connecting are 2 sets of Hertz DSK 130.3 - that is 4 woofers and 4 tweeters altogether, or 4 pairs of woofers and tweeters, connected together as per the schematic:

Screenshot 2023-09-24 165420.png (51.91 KiB) Viewed 1948 times

Note there is a difference in the way they are wired between the front door pairs and rear door pairs (top R154 and bottom R153 on the schematic are the front doors; middle two R155 and R156 are the rear doors), so I will need to know how to wire those speakers to the Pi Amp.

Given their rated wattage (60 watts continuous, 4 Ohms), I know that practically any Pi amplifier board would not be enough to utilise their full potential but that is alright since I am not going to blast music that much. That being said, I'd still prefer something decent that I can still use to turn the volume up a bit from time to time.

I need a 2-channel amp as basically 99% of the music is stereo and not 4-channel anyway, so I need advice what amp I can use and how to wire the speakers to it.

Would the HiFi Berry Amp100 do the job?

[aBUGSworstnightmare]

As an idea: https://www.raspberrypi.com/products/digiamp-plus/

You can stack HATs, just ignore checking the EEPROM. And yes, you need to avoid GPIO conflicts, so check the pin requirements in detail.

[relefat]

As an idea: https://www.raspberrypi.com/products/digiamp-plus/

You can stack HATs, just ignore checking the EEPROM. And yes, you need to avoid GPIO conflicts, so check the pin requirements in detail.

Thanks for the suggestion. One thing I cannot find information about is the resistance rating for the DigiAMP+, I am worried 35watts per channel might be just not powerful enough for my car speakers. I'd rather stick with the Amp100 however I found it actually shares GPIO4 with the LTE modem addon that I have chosen for my project.

have actually posted a new thread to ask if it is possible to readdress or remap an unused GPIO pin on the Pi which I can use to connect to one of the boards GPIO4 via jumper cables in order to avoid conflict:

viewtopic.php?t=356757

[aBUGSworstnightmare]

I would check here https://www.ti.com/lit/gpn/tas5756m