Originally Posted by dgeesaman

Yes, buy a Scosche adapter, and follow the directions for how to hook it up. You should buy a wire crimper tool, and use crimped connections on the wires. (Believe it or not, this is a better connection than soldering if you have a crimping tool). I've been running my Bose system in my daily driver for 5 years with a Pioneer headunit and Scosche adapter.

I believe there are full instructions in the Audio/Visual forum. Just dig in, and if you get confused about what wires go where, ask in there.

Dave

Originally Posted by Dane

I specialize in Bose systems in Nissans, and the early 90's Maxima and 300ZX have virtually the same system. The only major difference is the shape of the enclosures (of course) and the harnesses are different
The front speakers are 4.5" Bose drivers and are powered by “Omega” series amps. Nissans have Sigma series amps, but in reality there is very little difference (if any) and they are interchangeable from 91 up (front amps anyway). All Bose automotive amps from 91 and up have the same modular connection...even in GM and Honda products!
The front speakers are housed in perfectly tuned enclosures, and IF powered properly, will easily sound better than 75% of all aftermarket speakers you could buy. These are the same drivers, yet with tougher cones and cloth surrounds as the $1500 Bose 901 home speakers. These were also used in virtually every Bose automotive and PA system from the early 80's up until the mid to late 90's.
BEFORE you run and buy new speakers, I advise you to take out one front enclosure / speaker assembly. Then run a wire directly to the speaker (through the port for this test). Make sure you have reassembled the enclosure 100% airtight. Then hook the speaker up to your home stereo (for testing). If you think that you can beat the sound you then hear with aftermarket speakers, go for it! I am not saying you cannot do so with enough money and time invested, but typical off the shelf stuff won’t even come close.
Next, if desired, you can easily bypass the front amps in the RX7, simply by patching the output from the tabs in the female harness connector directly to the Bose speaker using the existing pass through on the enclosure. I make (sell) bypass harnesses for Nissans, but this is somewhat unnecessary for the RX7, since the tabs are standard .250’s in the female harness at the door panel. Anyone with common sense, and a set of strippers and crimpers could make their own bypass harness in about 10 minutes without cutting a single wire in the car. If you do this, remember that the drivers are 1 ohm, so wire and / or amplify accordingly.
The rear "Wave" setup is not so great unfortunately. They use 6.75" drivers which are also the same speakers used in the 90 model Z car, as well as Legends, and GM "Gold Bose" systems. These drivers are quite unreliable in comparison to the front drivers, which are nearly bulletproof.
In my opinion, I would eliminate the rear assembly unless you simply want to keep it for conversation’s sake or to keep the car OEM looking.
Another note, the Scosche adapter isn't totally necessary, but is helpful if you are not an experienced installer. The issue I have with them is that in reality, they are also a line level converter, so your system will never sound better than the weakest link. By using one of these you introduce quite a bit of noise, due to the process of the initial amplification of the signal by the deck’s amplifier, then the conversion to low level output by the Scosche adapter, then re-amplification back to speaker level sound by the Bose amp. However most people probably couldn’t tell the difference anyway (but I can!). I have seen other adapters that convert RCA leads to simple wires, but unless this is dirt cheap, why not do this yourself? Also, these have gain controls, so once again, you would be adding noise to the original signal by processing the signal through potentiometers, PLUS low level output is several times more volnerable to noise anyway.
The alternative is to wire in the new deck, just as you would if you didn’t have a Bose equipped car. The only major difference is that you would "splice" the RCA output of the deck into the speaker leads of the harness, rather than the speaker output of the deck. Doing the latter would overdrive the Bose amps into oblivion!
Any more questions…email me direct. Also, check out my site at the link below. Although it is written for Nissan-Bose systems, almost everything will also apply to the Bose equipped RX7. I will likely add a small RX7 section soon anyway, because I am currently dealing with a 93 RX7 with the Bose system.

http://webpages.charter.net/dm1/misc/bose.htm

Originally Posted by dgeesaman

I don't know if the current draw will go up or down if you run conventional speakers vs. Bose. If the current goes down, I'd re-use the existing wiring. The stereo shops probably won't do it because if there is a problem with the old wiring they'll be stuck in a mess.

I would not run both fronts to the center. That would destroy the stereo effect. If you're using the stock speaker locations, run the front outputs to the doors.

Dave