I got my full original stereo system working! My car is a 1991 it had the original head unit, amps were done in mid 2000s, it has the original CD changer but no cartridge. The head unit would not turn on when I got the car. Reading through thread I discovered this is a common problem with these units. I managed to find one that had been reconditioned and working. From many of the threads i read it seemed the consensus is that once it reaches the state of not being able to turn on there was a low chance of it being reparable. Which is why I went down the replacement path.
I don't have cassettes anymore. But I was curious if the tape deck worked. I went to a used record store on the weekend and found a John Lennon cassette for $2 to test it. I will probably never use it again but nice to know it works.
Plus I had no idea that records are so popular again. This place was packed and the records were flying off the shelves. I thought I was retro using CDs!
I could not find an original Acura CD cartridge for a reasonable price. Doing research I found references that the Alpine 4905 would fit and work. But, I was not 100% certain. There are lots of these available for reasonable prices. I purchased one for $18.

It finally was delivered today and I can confirm that the Alpine 4905 works! [So if someone else is searching for this you can move forward with confidence] And even better my CD changer works too and sounds great.
It will not play CDs that I have burned myself. I have seen threads where this is mentioned as a problem. There maybe some specific brands of CDs that will work. I have seen some mentions of this. I will try some to test it. The CDs I have tested thus far are Sony and Memorex.
I found some BOSE 901 speakers for a reasonable price so I purchased 3 of them anticipating that 30 year old speakers are probably on their way out. When I clean my window tracks I will take a peek at the speakers. They sound good so I may just keep the ones I bought as backups.
I have not had a car with a power antenna for a long time. Not since my 1999 Acura Integra. (in 1999) So like an idiot I drove the car under my lift which has plenty of clearance for the NSX but not the antenna.
Lucky I only slightly bent it. After some gentle massaging in my bench clamp I managed to get it straight again. Greased it and it works as it should again. From now on I will park the NSX is a different spot because, I know there is a 100% chance I will forget to turn it off before pulling in.
Even though I am a person who makes their living off selling technology I really like the 1990's stereo tech from some reason. I love the red digital screen and the simplicity of it.
I don't have cassettes anymore. But I was curious if the tape deck worked. I went to a used record store on the weekend and found a John Lennon cassette for $2 to test it. I will probably never use it again but nice to know it works.

I could not find an original Acura CD cartridge for a reasonable price. Doing research I found references that the Alpine 4905 would fit and work. But, I was not 100% certain. There are lots of these available for reasonable prices. I purchased one for $18.

It finally was delivered today and I can confirm that the Alpine 4905 works! [So if someone else is searching for this you can move forward with confidence] And even better my CD changer works too and sounds great.
It will not play CDs that I have burned myself. I have seen threads where this is mentioned as a problem. There maybe some specific brands of CDs that will work. I have seen some mentions of this. I will try some to test it. The CDs I have tested thus far are Sony and Memorex.
I found some BOSE 901 speakers for a reasonable price so I purchased 3 of them anticipating that 30 year old speakers are probably on their way out. When I clean my window tracks I will take a peek at the speakers. They sound good so I may just keep the ones I bought as backups.
I have not had a car with a power antenna for a long time. Not since my 1999 Acura Integra. (in 1999) So like an idiot I drove the car under my lift which has plenty of clearance for the NSX but not the antenna.

Even though I am a person who makes their living off selling technology I really like the 1990's stereo tech from some reason. I love the red digital screen and the simplicity of it.