D'Appolito on What Matters

In case others don't know, D'Appolito has designed many different types of speakers but he is most famous for the configuration that bears his name, the MTM (midwoofer, tweeter, midwoofer). Not all MTM designs are D'Appolito and not every speaker D'Appolito has designed are MTM. :)

As far as the mids matching, the design doesn't suffer from those problem so much. You en up hearing the average of the two drivers, assuming the speaker is properly designed. Some would even argue you'll get more consistent results by using 2 drivers, as the average will tend to vary less than any single speaker.

The D'Appolito also has improved room interactions vs. traditional 2-way speakers and in the midrange act closer to line sources.

I'd give them a listen, but not saying you should buy them.

^Can't comment on the D'Appolito's, but Dunlavy used a similar       W M T M W  driver configuration (with different cross-overs of course). 
It has been claimed that he had all parts tested, logged and matched accordingly, and then the cross-overs for each speaker was individually tweaked to match a reference.
http://www.stereophile.com/content/dunlavy-audio-labs-signature-sc-vi-loudspeaker-specifications#Gkx...

unsound,

If you are making high end, that makes sense! :)  It was probably a crap load of work then too! :)

Not just drivers, but caps and coils are notorious for varying. Depends of course on the type and maker. It's totally worth buying 1% resistors for this reason alone!

With automated testing and characterization software I imagine it's much easier now. Not to mention, if you are buying in bulk, you can request certain specs be tested before delivery.

Best,


Erik

Rumor had it that many suppliers were irked that he sent so many things back.

The last time I spoke with him, he was very excited about going to an all digital self powered multi-amped model. He was holding out for better chips. He said the amount of labor time would drop dramatically,  and though the initial project would be expensive, he thought that the cost of succeeding models would drop at a considerably fast rate. Regretfully, he didn't live long enough to see it to completion.