*wrybread wrote: ↑13 Jan 2022, 00:37 Nice on the carbon trim. Has it held up longterm? I have very mixed feelings about hot glue on anything other than fabric. It always seems to fail, especially in a hot car.
On a sidenote I'm currently working on my rear speakers. The previous owner installed 6" speakers with a janky loose adaptor, and I'd get rattle whenever there was deep bass. I'm sure they'd sound better with new properly installed speakers, but I like to blast music in my car sometimes, especially with my new stereo, and I don't think it's possible to get much out of 6" or even 8" round speakers, especially without proper resonating chambers aka cabinets.
So for now at least I installed some house style 8 ohm bookshelf speakers I had lying around. My amp seems to have no problem driving them and they sound fantastic. Like really really fantastic. My amp's specs show an impedance of 4 to 8 ohms, so I'm hoping they and my amp will be fine longterm. I was planning to connect an old Bazooka powered subwoofer in the trunk, but these have so much bass that I might not need to, for now at least.
They're currently installed in the back seat for testing, but I'm thinking about installing them in the trunk under the speaker hole, aimed up at the rear windshield. But the hole isn't quite large enough for both the woofer and the tweeter... Is it the worst idea on the planet to take a sawzall and enlarge that hole a bit?
Also I vaguely remember reading that Volvo wires the speakers in some special way (series'd or parallel, can't remember) that changes the impedance. Maybe they're expecting 8 ohm speakers? Something like that. If that's the case would I be better off disconnecting the rear door speakers, since they're not really doing much anymore?
You should not hook up two sets of speakers on one speaker output. Something about impedance matching so as to balance wattage drop accross amp and speakers. Too much or too little on one end it can cook the amp or not efficient enough to drive the speakers. It's been 35 years since I finished my AA in electronics and I've forgotten everything, even the basics, since I never used it.
Regardless, if you decide to use two speakers, tweeter and woofer, you should buy a crossover. If you send the highs and mids through the bass it won't sound good as the bass speaker is now a full range speaker. I used to know how to match crossovers with tweeters and woofers and have built cabinets. Some you can just install a capacity on the tweeter and leave the bass as full range. HS classmate's Dad was a high-end cabinet maker so I just gave him the design and he make it. Should probably just Youtube and figure it out.
The only odd thing we did in wiring was to connect the positive sides from both outputs to one speaker and install a rheostat in series. This center speaker through that wiring setup produced a reverb / echo effect. The rheostat balanced the output / sound with the rest of the system. That speaker was installed in the center of the dash.
The car is not really made for heavy bass sound. We back then wanted quality and well rounded sound so bass was not the main focus. Now people just want to thump and that will always rattle something in the car, sometimes a lost nut and bolt in the car or in the head
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