Here is the exact same tweeter as the 1038, but without the silver highlights, just all black (see link below). It is the KSN1056. If you want some, I advise you to stock up.

Also, here is another CTS horn, KSN1016:

http://www.martinsoundpro.com/item.asp?id=340

I think this is the same driver, but the horn lens is a different shape. I don't know how this affects the sound, or if this is a viable substitute. Perhaps Wayne can answer that.

• http://www.adelcom.net/MOTOROLA_ksn1056.htm

The KSN1142a is the same driver as the KSN1165, which has a small horn on it.

The KSN1165a's are also Powerline series. I have a pair of these for my home stereo, used with some Speakerlab W1008b woofers. These are 10" woofers that have an Fs of 20 hz. In 2 cft sealed boxes go down to a nice 45 hz.

The woofers were rated as SPL=92 db, as are the 1165's, but they sounded too bright. Wayne and I have talked about this, we both agree that the CTS's are really more like 96-97db.

So, I put an 8 ohm resistor across the terminals, and an Lpad in front of it. I have 11 uf cap going to it (10 + 1).

On the woofer, just a zobel (I don't remember the cap right now) and a .75 mH inductor.

To my ear, turning the L-pad down -4 db gives the most natural sound.

I have some KSN1188's, rated at SPL=93 db, used with some PA speakers rated at 97 db. Yet they sound right.

I agree with Wayne, only the genuine CTS/Motorola Powerline piezos are worth fooling with.

Wayne... I am using the 1188's now with my PA speakers, and have them biamped. I find the best sound is with the crossover turned as low as the 1188's will respond, using their full frequency range, which is down 650 hz -3db. That is amazing.

Unfortunately, 1188's, if you can find them, are about $50, and you can get the excellent Eminence PSD2002's for that price.

• http://www.martinsoundpro.com/item.asp?id=340

Luckily I have several of the KSNs like posted in the link above, since selling my Stage 4 Pis I have had alot of time with my One Pis..I really love them. Probably moreso than my Stage 4 Pis believe it or not.