Sound differences between KT-88 and 6550 ?

[dennq]

Can anyone tell me what the difference in sounds are between KT-88's and 6550's

 

[Amokoma]

I think the KT-88s give more bottom whilst the 6550s are a tad more hifi. Not entirely sure, so I'm about to test it. I'm gonna swap the original tubes in my Peavey Classic 400 from the so-and-so 6550s to Genalex Golden Lion KT-88s.

 

[i_got_a_mohawk]

KT-88s are more hi-fi, and tend to have a bit more punch to them
6550s tend to have a bit more grind

Also, KT-88s are a bit higher powered

 

[Psycho Bass Guy]

This has been covered pretty well by the ten or so other threads that ask exactly the same thing.

 

[GreyBeard]

I've played a lot of tube amp but I really don't know the difference between a KT88 and a 6550. Can an amp designed to work with 6550's be fitted with KT88's. What adjustments have to be made to the amp? Is it really a good idea to substitute one power tube for another?

 

[anderbass]

6550 vs KT88 info:
http://www.google.com/custom?domain...;S:http://www.talkbass.com;LP:1;FORID:1&hl=en

 

[i_got_a_mohawk]

I've played a lot of tube amp but I really don't know the difference between a KT88 and a 6550. Can an amp designed to work with 6550's be fitted with KT88's. What adjustments have to be made to the amp? Is it really a good idea to substitute one power tube for another?

They are substitutable.