NORTON
Posts: 1336
Joined: Fri May 01, 2015 5:52 am
Location: KC,MO

Re: Aftermarket speakers?

Tue Dec 10, 2019 11:02 am

Thanks for the great posts!
Just bought it on amazon for $70.
Definitely worth a try!
And I like the idea of stashing the EVSE under hood, only in the winter I use it daily at work, so it stays on the floor behind me.
Used '14 2LT w/ DCFC. +85k miles.
Mostly free charging! Only one LONG visit to the shop....
GM needs Modern Troubleshooting tools for Modern EV's.
3 step Trouble Tree, 1st try car died again, 2nd try / cost $800. 3rd try fixed the problem.

kentdog
Posts: 1
Joined: Fri Aug 21, 2020 3:48 pm

Re: Aftermarket speakers?

Fri Aug 21, 2020 4:36 pm

I did a dumb thing. :twisted:

Having followed this thread since I got a used Spark almost a year ago, I have been on the verge of doing some these suggested upgrades many times, particularly after a long drive on a sunny day. Cruising with the windows down, but, unfortunately, the volume down, too, due to aforementioned issues. However, I never pulled the trigger due to the lack of a very simple plug and play option that would require minimal work. I even bought the Mazda cable adapters at one point, but hadn't use them yet.

A few months ago, I bought a new home theater receiver to replace the following cheap RCA I had gotten years ago:

https://www.amazon.com/RCA-5-1-Channel- ... 000P6J79E/

It was cheap, but I liked it a lot, particularly the subwoofer. It had been sitting in my garage until I finally got rid of it today, but I couldn't part with the subwoofer and decided to keep it around. As I moved it around, I noticed on the back label that it had an impedance of 8 ohms and I was reminded of this thread and the fact that the front speakers were oddly (for a car) the same.

Why not give it shot? This sub is not powered and just has the two bare wires for use on the receiver. I disconnected both rear speakers and hooked this up to one of the leads (using the adapter), not expecting much. To my surprise, it worked like a charm, and doesn't seem to have caused any issues (yet). I set the fade slightly to the rear channels and I'm bumpin California Love no problem, vibrating my rear view mirror (in a good way).

Two things: I don't know if this will eventually cause electrical issues, and this thing is LARGE. I basically gave up one-third of my trunk space, but now it's full of bass.

TheLondonBroiler
Posts: 256
Joined: Tue Oct 31, 2017 6:25 am

Re: Aftermarket speakers?

Fri Aug 21, 2020 5:30 pm

kentdog wrote:
Fri Aug 21, 2020 4:36 pm
To my surprise, it worked like a charm, and doesn't seem to have caused any issues (yet).

Two things: I don't know if this will eventually cause electrical issues, and this thing is LARGE. I basically gave up one-third of my trunk space, but now it's full of bass.
Unless the resistance changes beyond the range of say 2-12ohms (this should only happen if the speaker coil was damaged), there's no reason you should have an issue. The resistance regulates the power the speaker will draw, the amplifier in the radio wants an resting ~8 speaker, and that's what you gave it, so it's probably going to be happy.

The only issue you're having, that you may not be aware of, is that you are pushing a full range of sound frequencies through a speaker that doesn't want anything above ~200hz. This isn't anywhere nearly as destructive as the inverse (giving a full range of sound to a high frequency speaker), but still probably not a great idea.

I've only ever used inline "high" power (relative) high pass filters, which block bass, when I installed mobile electronics professionally, but after a quick glance, it appears that inline high power low pass filters (LPF) exist and aren't very expensive. If there was one thing that I'd do, I'd explore the possibility of a inline LPF. If it were me, I'd be looking to block anything above 120hz. I can't recommend this product I'm providing a link for (because I've never used it), but I think this is probably the piece that would compete your puzzle.
https://www.amazon.com/Nippon-HC-101-ch ... B009D9KHZ2

Best of luck.
2015 Spark EV w/ DCFC 48,XXX miles
Purchased 1/20/18 w/ 16,5XX miles
0-40k mile efficiency avg - 5.3 mi/kwh

2019 Bolt EV w/ DCFC 63,XXX miles
Purchased 3/16/19 w/ 87 miles
Lifetime efficiency avg - 4.7 mi/kwh

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