KT88 tubes for Monos


Hi,
I have a set of Ayon Audio mono's that use KT88 tubes.  Over time I've purchased their importers version of the KT88's that are 200 bucks a pop.  Can I use a different tube?  I think I'm paying premium cash for the Ayon name on the tube.

Thanks.
jbbikerider
Contact Jim McShane:  http://www.mcshanedesign.net/

Very knowledgeable, great inventory, good prices and very responsive.  I've purchased several tubes from him (including a quad matched set of Gold Lion KT88s).
Jim McShane can provided matched tested KT88's. The GL reissue are great take about 100 to start sounding there best.
Psvane TII are also very fine sounding tubes very musical.

So next question,

If my amps have auto bias, in the manual it says that matching tubes is not necessary. 
thoughts??
I would like to spread the word about these tubes from a company called Canada Fuller found here, Quad matched Canada Fuller KT88G Gold Pin Vacuum tube ( KT88 ) | eBay.  They're designed by that company and the key components come from Canada (I believe) and the U.K., but they are manufactured in China by ShuGuang.  In my Music Reference RM-200 I've tried several tubes such as the RAM's that came with the amp, Sovtek, and have gone through a couple of sets of Gold Lion.  Someone on A'gon mentioned these tubes so I gave them a try and I've never looked back.  If you don't mind using a Chinese brand or buying on Ebay, I don't think you'll be sorry.  In fact, I know you won't.  They're that good.   
I had issues with some sloppily made Psvanes (albeit 12AX7s, not 88s) so I won't be trying those again, but having rolled Tung Sol 6550s, KT120s, Sovtek 88s, and KT150s through my amp I wound up becoming curious about the (new version, not NOS) Russian Gold Lion KT88s and stuck 'em in last year…they sound great, maybe the best match with my Jolida 502p amp than all of the above, and since they're relatively inexpensive they're kind of a bargain. Highly recommended.