Kef Q100 Speaker Drive Unit Testing

As with the Kef HTS3001SE I tested, I ordered a set of the Kef Q100 Bookshelf speakers in order to remove and review the raw Q100 driver itself. I really wanted to see how this coaxial design performed. Zaph had already tested this one but I wanted to do Klippel LSI testing on it to see how the suspension performed. He actually mentioned this in his writeup and I thought it would be cool to provide the results. Of course, since I had it on the test baffle I did some other standard measurements as well. The one I was interested in, but didn’t perform on the HTS3001SE driver was tweeter frequency response performance with movement of the woofer. I don’t necessarily have an easy way to test this so I did something a bit different: I used a 9v battery to statically ‘fix’ the woofer either in the coil out or coil in position and measured the response. I then compared this to the woofer at rest performance of the tweeter and did a direct comparison. This is discussed further below.

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