Replacement tweeter suggestions

Replacing tweeters with something not stock is tricky. If you want to go down that road Parts Express is your friend. You're already hit on some of the issues to deal with but there certainly are more. You have to find one that fits or can be adapted to fit, has the same impedance, sensitivity, and type (hard/soft dome) that will match what you have. You also have to find one that will play comfortable down to 1.8k so be sure to look at your response specs.

I would recommend that if you find one that will work that you do both mains so they will sound the same. It not you'll have one speaker that is likely to "stick out" from the rest. You might also consider doing the center too while you're at it if it's the same series. If not then just do the mains.

 

Looking at the speaker, I don't see how you even replace them. Do you access them from inside the cabinet? Does the speaker have a decorative cover over the front?

Tony hit some points you have to remember and one was impedance. He may have meant resistance but the impedance curve must match as well or your crossover point will change. Because an 8 ohm speaker is just 8 ohms nominal. The actual resistance will vary by frequency.

You either roll the dice and get a tweeter that you can fit in and might work. Or you get an exact replacement either from Ebay or getting them rebuilt as closely as possible. The third option is to just reuse the cabinets and find a DIY speaker design that will fit it. Here's an example of a TMM that may work depending on the actual size of your cabinets/drivers - http://projectgallery.parts-express.com/speaker-projects/usher-tmm/ .

 

I would trust Simply Speakers to rebuild each tweeter. Those guys have been in business for decades and know what they are doing. I've ordered woofer foam from them for some speakers that are approaching 30 years old.

Yes, it is replacing the guts of the tweeters but there isn't much to replace. It looks like an aluminum or titanium dome and there is a voice coil you can't see. They can look at the original tweeter to determine the wire gauge along with the number of turns and rebuild it as close as possible. It will be closer than anything you can buy off the shelf. Only Energy can supply anything better.

 

You can't get anything "close" because you don't have any idea what you already have outside of the description. You know the size of the speaker and that they are aluminum domes. Nothing more.

Looking at Parts Express, they have six tweeters that have a 1" metallic dome and they range in price from $11 to $92 each. Even if you pick one of them, you may have to modify the mounting system to get it to work with your speaker's reverse mounting system.

You have a broken tweeter in one so you can't mess it up any more. Replace that one with a Dayton Titanium model. If it sounds good, then replace the other tweeters so you have a matched set of speakers.

I would like to see pictures of your tweeter when removed. The reverse mounting looks neat so you only see the dome.

 

They are both 6 ohm tweeters. You will have to redesign the high pass filter of your speaker's crossover. Why? Values of the components in a passive crossover are chosen based on the impedance at the crossover point. If you change the impedance, you change the crossover point. I can't remember which way but the new tweeter may be crossed over lower meaning it will blow easier or higher meaning you will have a gap in the frequency response.

How about a Morel? http://www.parts-express.com/morel-mdt-22-1-1-8-neodymium-tweeter--277-062 Yes, the dome is 1/8" larger which may require you to open up the the hold in the cabinet but it's frequency range goes to 1.8k hz and it is 8 ohm. There are 50+ other 8 ohm tweeters on the PE site.

 

I can get you a used one or i can offer to buy your good one if you did not fix yours yet. I will use the money to partially fund a set of 2. I am in the same situation, one is damaged. Let me know. I fully tested the good one.