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If anyone is interested, I'm cleaning out the garage and have the following...
DRX9575rz Head Unit with two faceplates
DRX8575z Head Unit
DPH7500z processor (works with either of the units above)
CDC655z 6-disc changer (works with units above)
Remote Control for the units, possibly two
One CeNet cable

I have an optical cable too but I just emailed Alex from Brazil about that since it appears he has been hunting for one for quite some time.

PM me if you are interested in any/all and I can give you more details.
 

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If anyone is interested in this stuff let me know by sending a PM. Cleaning out the garage.

Clarion Drx8575z - works fine but sometimes shuts off when you go to insert a disc

Clarion Drx9575rz - works but backlight doesn't come on, have extra face plate but turns out issue is with ribbon cable.

Clarion Remote - works

Clarion DPH7500z - works

Clarion 6-disc changer - worked when I pulled it out, haven't tested

10' CeNet cable












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I was wondering, has anyone here ever had one of the clarions in the 80s rx7 (seperate tuner, eq, and tape deck)? how did they compare to clarions aftermarket gear/ aftermarket in general at the time?
Came across your post while searching for something else. I picked up an '85 RX7 last year with 20,000 original miles and an untouched factory stereo system.



This was above and beyond nicer than any 80's radio I experienced, although I must admit my experience is limited to a handful of Fords and Chryslers with speakers so cheap they were destroyed by the time I took ownership. In comparison, the Clarion system held up well. The front speakers were slightly damaged from years of climate fluctuation but still worked fine while the more robust rear speakers were like new. This was a modular system and consisted of a tuner, tape deck, and optional EQ. Line-level signal was then sent to a pair of Clarion amps mounted behind the seats, roughly the size of today's class-d micro amps and were supposedly each rated for 25 watts x 2. The bane of the system was the center console fader joystick. It was easy to hit by accident, it was very touchy, and would occasionally cause certain channels to cut out. Radio reception was passable but not acceptable by today's standards. The quality improved immensely when listening to cassettes of appropriate vintage.

Being a car audio enthusiast, it didn't take long for me to start messing with the system. First I just tried aux-input with one of those cassette tape adapters. This clearly was cutting sound below 100Hz so I gave up on it. Next I tried an antenna adapter but those failed miserably. Finally, I read through the workshop manual and learned how the bus system works between each of the modules. I hooked up a 1/8" aux jack in the audio signal path and used a relay and a switch to trick the tuner into thinking the cassette was playing, while simultaneously making sure the cassette did not actually turn on. Voila, real aux input! Now I could really review the system. Oh wow, it's horrible once you get a quality signal. Replacing the speakers with aftermarket units only revealed how grainy the amps sounded...so I pulled those. Using most of the factory wiring I now have a mini class D amp powering front and rear speakers, the joy stick fader is bypassed, and I have a bluetooth module connected to my aux input. I can switch over to radio or cassette if I want, but whatever source I have I can still use the main volume and the EQ. It's pretty good now...but I wouldn't sell any of my modern equipment to have this. For my next iteration I will install a processor with it's own volume knob and multiple inputs. I'll bypass the head unit entirely for bluetooth source but have a way to switch to the radio and cassette deck whenever I want. I'll tune the system with the processor and just use the factory EQ to balance out the radio/cassette playback.

Anyway, to get back to your question, I'm guessing this unit was very similar to Clarion's aftermarket offerings of the time. Mazda charged quite a bit more for the models that came equipped with all the modules. However, what passed as really nice back in the 80's was a far cry from just about any OEM stereo offered a decade or two later.

A quick tip though, with the right connectors (which I found on Amazon) you could repurpose the EQ in another system. That's the great part about the modular radio!
 
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