Adding a switch or cutting off the tweeter in my Warwick CCL

[Puavo]

At higher volumes, my warwick CCL combo seems to get annoyingly trebly. On account of the amp havin a 15" + horn arrangement, I'm blaming the horn.

I've read some of the previous threads on the subject, and am now trying to make sure not to do any further damage to the amp. I removed the woofer from the cab as much as the wiring would allow and did some investigating.

The signal path as far as I understand is as follows.

Power amp to the speaker output jack in the back panel.

Cabs built-in speaker cable to the 15" woofer

Speaker cable inside the cab from the woofer to a bunch of plastic parts, one of which is labeled:
Intertechnik 8,2 ohm +-5% 20W (this is apparently a resistor)

Speaker cable from that plastic part to the horn.

I've read Bill Fitzmaurices comments on placing the switch before the high pass filter and trust him completely. I'm basically trying to figure out, if it is this plastic part that is the high pass filter, as it seems to me.

All help and ideas are appreciated.

[Jazz Ad]

Any on-off switch on any of the 2 wires will do, before or after the filter.
They are passive components and the tweeter doesn't carry much power.
Impedance doesn't change much of anything here.

While the cab was open, did you see much insulation inside? I've seen Warwick cabs (mostly combos) that sounded harsh because they weren't insulated.

[Puavo]

Thanks. Sort of how I figured it. Seems that the woofer is getting the full signal in any case.

The cab is well padded, I'd guesstimate just under an inch of padding on all sides.

[Puavo]

As I have your ear, I grew a pair, took out the woofer and invesigated the part (L-pad, Hi-pass filter?)



Is there a simple way to add an attenuator to the circuit, and if I want to do it, do I just add a part, or do I change the existing part for another?

E: I would still appreciate advice about the attenuator, but it is not very urgent as I unhooked the whole wiring assembly to the horn leaving only the woofer in the signal path and didn't lose any high end I'd see myself missing in the foreseeable future.

[Jazz Ad]

Attenuator is another story. It's quite a lot of power to dissipate.

[Puavo]

Ok, thanks. Figures that it's more of a challenge. Oh well, the sound for my tastes is better for the time being with the horn fully out of the circuit.

[Leakim]

You could swap the blue component, whitch is a capacitor, to a capacitor with lower value. That rises the crossower frequency for the tweeter and makes your sound less harsh. I have good experience with a value of 1 µF.

[will33]

What's the tweeter look like? You have a cap and an 8 ohm resistor there. It's possible you have a piezo tweet with a resistor across the terminal leads making it "act like" a regular tweet so the cap can pass it at a given frequency. Or it could be there to help pad a regular tweet but think you need more than one resistor to do that. You could change the cap value to change where the tweet is passed at and add an L-pad (3 wires, not difficult) or put a switch between the input and that filter.

It likely sounds harsh because the tweet isn't passed steep enough. 1 cap = 1st order. Should be 3rd order unless it's passed pretty high like 5k, then 2nd order would be ok.

Or just disconnect the whole works and let the 15 do it all but leave the tweeter in there just to plug the hole so it doesn't throw off the cab tuning.

[wcriley]

The simplest solution = EQ.
Or don't amps and basses have tone controls these days?