is the LNFB on the return side of the dumbleator necessary?

Joost · Post by **Joost** » Thu Jul 21, 2011 7:57 pm

I like the clean channel of my #124 better when I shunt the LNFB on v1 to ground. so I was wondering whether the dumbleator would sound even better without the LNFB on the return stage?

Fischerman · Post by **Fischerman** » Fri Jul 22, 2011 12:54 pm

Can you somehow do a blind test between the two to see if you can even tell a difference? 20M is a lot of resistance. I'm sure someone like dogears can but tinears (me) can't. In any case, try it both ways and decide which you like better.

Joost · Post by **Joost** » Fri Jul 22, 2011 2:24 pm

Fischerman wrote:Can you somehow do a blind test between the two to see if you can even tell a difference? 20M is a lot of resistance. I'm sure someone like dogears can but tinears (me) can't. In any case, try it both ways and decide which you like better.

No I cant easily try. But if you can't hear a difference I do wonder why it's there in the first place

glasman · Post by **glasman** » Fri Jul 22, 2011 4:26 pm

Joost wrote:
Fischerman wrote:Can you somehow do a blind test between the two to see if you can even tell a difference? 20M is a lot of resistance. I'm sure someone like dogears can but tinears (me) can't. In any case, try it both ways and decide which you like better.
No I cant easily try. But if you can't hear a difference I do wonder why it's there in the first place

Alexander probably included it to control the low end response of the recovery amp. It does roll off the low end and limits the gain of the stage. One of the problems with the "unlooped" recovery amp is that they are very easy to clip or at the least compression of the signal.

Gary

Joost · Post by **Joost** » Fri Jul 22, 2011 8:51 pm

That's a great answer thanks!

glasman wrote:
Joost wrote:
Fischerman wrote:Can you somehow do a blind test between the two to see if you can even tell a difference? 20M is a lot of resistance. I'm sure someone like dogears can but tinears (me) can't. In any case, try it both ways and decide which you like better.
No I cant easily try. But if you can't hear a difference I do wonder why it's there in the first place
Alexander probably included it to control the low end response of the recovery amp. It does roll off the low end and limits the gain of the stage. One of the problems with the "unlooped" recovery amp is that they are very easy to clip or at the least compression of the signal.

Gary

jelle · Post by **jelle** » Sat Jul 23, 2011 6:00 am

The difference is not huge but it is there. I would yould recommend to try it with and without...a guitar player and a pair or pliers will do it.

Jelle

Structo · Post by **Structo** » Sat Jul 23, 2011 3:46 pm

Put it on a switch.

glasman · Post by **glasman** » Sun Jul 24, 2011 3:40 pm

Structo wrote:Put it on a switch.

Put it on a 3 way with a 20M and 40M. great options there.

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is the LNFB on the return side of the dumbleator necessary?

is the LNFB on the return side of the dumbleator necessary?

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Re: is the LNFB on the return side of the dumbleator necessary?

Re: is the LNFB on the return side of the dumbleator necessary?

Re: is the LNFB on the return side of the dumbleator necessary?

Re: is the LNFB on the return side of the dumbleator necessary?