Eminence APT-150 Super Tweeter with 100° x 50° Horn

I'd already bought two of these tweeters from Parts Express, so I added another.

Each time I just specified the cheapest delivery, yet I got them the very next day. I don't know how Parts Express does it, but they are my first choice for anything they sell!!!

Using this tweeter for a custom DIY speaker, and this will work perfectly for a very nice price. Horn is somewhat large, but that is no concern on this project.

I used a pair of these with the ready made Eminence 3.5 KHz 18 dB/oct x-over. Whether teamed with a Delta 10 or Beta 8 (an excellent driver by the way)they make a great PA or monitor setup, with of course a restricted bottom end. Perfect for hauling to a rehearsal space or use on stage at smaller venues. Avoiding abuse or excessive feedback they provide excellent vocal output from relatively robust power amplifiers with out damage.

What I do find a bit troubling with this APT driver/horn combo is a prominent harshness, or peakiness in the high frequencies. I know this is not the result of the low end driver. After many sessions its presence makes itself known and it becomes a bit irritating. This particular horn my be the culprit as others seem to be happy with the driver itself, though I know too that when I tried crossing over at a lower frequency and a 12 dB/oct the sound was a complete disaster - way too much resonance and honk. This driver must be crossed over at 3.5 KHz or higher for the system to sound good in my opinion.

As many others have commented I'm liking the 7" Dayton waveguide with a decent driver and will not use the APT in future projects.