Can I add a Piezo tweeter to Peavey KB100?

[Jayz]

I have two 1984 KB100's. I've noticed that more current amps have piezo tweeters as well to accentuate the higher freqs. Can I add a CTS piezo tweeter to my existing KB100's? I also have a Fender KXR60 and it has a tweeter and I've attached a part schematic showing the speaker/tweeter configuration. Am I crazy?

[The Dude]

I'm pretty sure the KB100 already has a tweeter. Possibly yours is blown or has a bad crossover cap? At any rate you can certainly add one (or another one) if you like.

[Jayz]

Thanks - if it does have a tweeter it's not shown on the schematic - I haven't looked in the cab yet.

[Enzo]

Schematic covers the amp, not the cab.

[J M Fahey]

And I'm quite sure you already have a Piezo there.
The KXR schematic shows one.
Notice it's confirmed a Piezo because it has no crossover capacitor, just a 2 resistor attenuator, probably to tame its shrillness.

[Joe L]

And I'm quite sure you already have a Piezo there.
The KXR schematic shows one.
Notice it's confirmed a Piezo because it has no crossover capacitor, just a 2 resistor attenuator, probably to tame its shrillness.

The piezos can get shrill if you drive them hard. I once built a couple of small cabs for our PA with six of them at 3 different angles that sounded fantastic as long as you kept the level down. They even took some of the load off the HF horns.

[Dave Curtis, dB AudioTech]

My KB100 is roughly the same vintage and it has a piezo horn (~3"X6") mounted to the grill. Are your grills intact? Although there are no resistors, it's not shrill at all. Mine came from the transfer station (dump); someone had stomped on the speaker. Sounds great with a JBL in it. I use it for bass in band #2 at the moment.

[Jayz]

Thanks Dave. I'm somewhat embarased! I was looking only at the schematic and the tweeter doesn't show there but you are correct - both my KB100's have tweeters!

[J M Fahey]

I wonder just how you didn't notice the actual tweeters before

[Dave Curtis, dB AudioTech]

Ok, I'm going to laugh uncontrollably in 3... 2... 1... No, I just can't. I've told myself and others that there is no such thing as a stupid question, and it would be unethical for me to laugh uncontrollably. So I'm not going to. Oui awl mayk misteaks, rite?. ;o)