6505...bias clips...

[Lasse Lammert]

inspred by XES's post in my other thread I decided to have another wee idle current shootout with my 6505 (white) again....

here are the clips:

22mA
32mA
37mA

I'm having it at 25mA now btw...sorry, no clip for that.

 

[MetalJonesy]

as soon as my 6505 is paid off in finance, I really need to do the bias mod!!

 

[::XeS::]

I like all the clips but I prefer the colder one, but as I said in the other thread, different bias settings can fit different kind of playing or song.
The colder one sounds more aggressive and a little more sterile.
The hotter is louder, has more low-mids (a little more bloated).
Moreover hotter bias doesn't tame the fizz of the amp as someone say.

As everything, it's a matter of taste

 

[::XeS::]

Not too much success for this thread

 

[jipchen]

Nice clips, thanks a lot. I think mine is now running at 30,5 mA and it was sounding like shit with the bias settings it came with (around 20mA).
I do like all samples, the 37mA-sample are maybe a tad better, but nothing overwhelming.

 

[::XeS::]

Does anyone know how the 5150 3 is biased?

 

[DigiV]

Again such little subtle differences it doesn't make a significant change in a mix or at least can't be something you can't fix with post EQ.

The hotter the bias the more bloated it seemed, that's all.

 

[P-E]

Colder ftw.

 

[TheWinterSnow]

Hotter > Colder. I have mine at 42mA and there is a huge difference between that and the stock bias (12mA).

 

[Eduardo Apolonia]

For me 22 sounds too cold and 32 too hot
Maybe somewhere in between

 

[P-E]

^ Which is why 25 must sound pretty cool actually.

 

[Ola Englund]

Must say that is a DAMN fine sound you're getting with the 6505!

I prefered the 22mA the most btw...

 

[Ohmission]

Sick sound. Maybe I'm crazy but the hotter biased ones sound much warmer and alive to me. A little trade off of tightness maybe, but it sounds thicker hotter.

Cheers,
George.

 

[TheWinterSnow]

a lot of people forget that hotter bias change the resonance of the feedback loop, yes with he same settings the hotter biased is going to sound more stuffed up especially at higher volumes, turn down the resonance knob and dial in your settings to compensate, its not that hard to do people.

 

[Jarkko Mattheiszen]

I kinda digged 32mA the most. Sounds fuller than 22mA but still not too mushy. The 22mA tone could work better in a mix, though.

 

[Frankzappa]

I like the middle one the most however you would probably get more difference in tone by standing too close to the EQ section of the amp while farting

 

[Lasse Lammert]

everyone who thinks this is very subtle:
put the files in your DAW, normalize (RMS) to get the same volume, and switch DIRECTLY back and forth between the files.
the difference is BIG!
definitely much bigger than like going from a cheap preamp to API or something...
so if you still can't hear it you should perhaps think about your monitoring/room, somethign is wrong there.

 

[gabriel g.]

like the hot one the most!!!!

Sounds like the amp gets tighter with higher Amper.
Like more in the face

Love the hot one

 

[nwright]

Hotter > Colder. I have mine at 42mA and there is a huge difference between that and the stock bias (12mA).

42mA's seems excessive. I think you should bias only to 70% plate dissipation which for 6L6's is something like 32mA's?

Also, the stock bias I believe is "around" 16mA's. I've heard people say they've gotten reading as low as 12, some as high as 22.

 

[nwright]

Shane, what were the amp settings for this, and it was boosted, right?