SVT3-Pro and GK SBX question?

So I picked this Ampeg SVT3-Pro up a week or so ago...

http://www.talkbass.com/forum/showthread.php?t=502013

I have been playing it thru my GK 410 SBX Plus and GK 115 SBX, both 8ohm, both bi-ampable (set to full range for both tests), both with adjustable horns....now the question...

With the horns in the cabs turned all the way down, the rig sounds great, but if I turn the horns up any, they have an overdriven "fuzzy" sound, regardless of volume or gain settings

To verify the horns were OK, I hooked my GK700RBII (normal rig) back up using all the same cables and bass (stock Highway One P bass), and the horns were crystal clear

Now, when I tried out the Ampeg before I bought it, the cab I played thru did not have a horn in it, so I did not notice any problems then. And the tone/sound from my GK cabs with the horns off is not fuzzy or distorted at all. And I can't see the Ampeg just overdriving the horns, even at low volumes?

I really like the tone I am getting with the horns off, but I guess I am just worried about an underlying problem

Biskitt

 

Thanks, I'll give it a try, but right now I only am running the preamp (gain) at about 9o'clock position and the tube gain about 10o'clock

 

Just an "update"...

Went to GC today and gave two different SVT3-Pro's a shot and they both had the "fuzz" I was describing, so it is either in the settings I was using, or just the sound of the 3-Pro. So I now feel better about the one I picked up.

The downside....I played and SVT-CL thru an 810E.....

THAT, is the sound I am after...!!!

Guess it's time to start saving up....