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Discussion Starter #1
A while back I stumbled across some information on the Audio Development MM 4" mid range driver. I was intrigued enough to buy a pair of them ( the fact I love the Vipera F6 drivers from AD also helped). Upon opening the box you notice the lack of a dust cap on the cone. Then you start noticing all of the machine work on the basket. Aesthetically, these really are beautiful pieces of workmanship. I then proceeded to install the drivers into my truck. I for the moment have a new favorite mid range driver, WOW! These drivers ( in my install anyway ) require very little eq to dial them in. I am currently running these from 200Hz to 6500Hz with LR 24db slopes. These drivers are simply amazing. I expected that they would be very good, I wasn't expecting them to be THIS GOOD. In my personal perspective these are the best mid ranges I have had to date. When one considers that I have had the Eton 3-400, Hybrid Audio Legatia L3v1 and the Sinfoni c89m all in the truck, the fact I feel that the mm4 out shines them all to me anyway is a mouth full. Admittedly, these are easily the most expensive mid range drivers I have tried to date, but, worth every single penny of what I spent. If your into sound quality, you simply can't go wrong with the mm4, I feel it is just that good.
 

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I did use these MM4 mids with the AD ribbon tweeters (T1FR) for some 2 or 3 years until the tweeters started failing me (I have already bought them used so I can't really say they should have lasted more or not). What a great pair they make! Pretty good vocals and percursion and a lot of sparkle from the twts also.
 

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HOw do these compare to the Etons you had? I have a set i have yet to play with.
 

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Not answering for Ritch, but he mentions the Etons in the first post.
Right, but I have the etons and I was curious how the Eton driver compared to the AD. I understand one is better to him, just curious where the improvement is and at what frequency etc. Just getting an opinion from someone who's used both.

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Right, but I have the etons and I was curious how the Eton driver compared to the AD. I understand one is better to him, just curious where the improvement is and at what frequency etc. Just getting an opinion from someone who's used both.
Gotcha. Shows what I get for replying before my coffee kicks in. LOL
 

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Discussion Starter #11
The Eton 3-400 is an excellent driver. I really enjoyed them. However, the mm4 is in a whole different class. The mm4 is easily in the top 3 of favorite midrange drivers for me.
 

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Discussion Starter #12
Sorry that it took so long for me to reply. As I am sure you noticed, I dont always get on here real regularly.
 
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