[eliteway13]

I am installing sounds in my 1966 mustang. Should I cut the back to fit the 6X9? The second question is how do you hook up tweeters? If you must answer just one question answer the tweeter one because I will probably not cut. I’m installing the exact same sound system from my old 66 to my new 66. I was happy with the way it sounded. I just don’t remember how they hooked up the tweeters. All I have is a 15inch speaker box, two 6X9's, two 6.5 round speakers and the two tweeters, and a 4 channel amp. When I went to the sound system shop they want to me to buy this thing that will filter the sound from the tweeter so there is no voice. Like I said I'm happy the way it was I want no more or less. Some people say to hook up the 2 channels of the amp to the box and two channels to the 6X9's. And to hook up the 6.5's to the stereo. But what do I hook the tweeters to? Also some one told me that they could hook up the 6.5's and the 6X9's to the same 2 channels. Could you do that? I think that it was like that because it was loud when I had it. Thank you

[beetlejuice]

I wouldn't cut out the rear panel to fit 6x9s. I believe it was made to fit 5x7s, not sure. However, your 6.5s are probably component speakers with the tweeters and are made to work together since the 6.5s don't make high frequencies just mids as the tweeters don't make lower frequencies just the highs. If the 6.5s have no tweeter built into them you'll know. It might even say on the back of the magnet with the model#. If they have the tweeter built in it will be a small seperate speaker raised above the cone with 2 little wires going to it-a coaxial speaker, then you don't need the tweeters. If they are components and you use one without the other it will sound like krap. You should have the crossover boxes that came with those tweeters which splits and sends the frequencies to the proper speakers. If you don't have them you NEED to buy a pair to make them work right. Usually, hooking up the head unit to the components is fine unless you're into major sound systems. The 15" should have it's own seperate amp wired as mono to the one channel if it is a single 15" speaker. And the 6x9s or 5x7s can be put to the amp or the head unit. But if you have 2 channels left on the amp after the subwoofer(2 into 1-mono) then use that.