Two articles are in contradiction about the BD-2 tonestack, which one is right ?

[eh là bas ma]

" a Fender-type 3-band tonestack with fixed values (with the treble on 0 and the bass and mid on 10)"

from https://www.premierguitar.com/gear/boss-bd-2-mods

and :

"Here, Bass is maxed out, while Mid and Treble are kept at their minimum value."

from https://www.analogisnotdead.com/article25/circuit-analysis-the-boss-bd2


This is slightly confusing. Isn't there some contradiction about the Mids setting ? Which article is right ?

Thank you for your help !

 

[Harry Klippton]

Isn't there a boneyard post about the bd-2?

 

[eh là bas ma]

This is getting even more confusing : Chuck's analysis is in contradiction with both articles :

Fender tone stack with Treble at 0, MID at 6 and Bass at 10

I still wonder who is right ? B. Wampler, Analogisnotdead, or Chuck D. Bones ?

 

[swyse]

Blue Pilot, an integrated Blues Driver

INTRO Hello everyone. The Blues Driver always pops up among the most popular overdrive pedals, no doubt because many people like how it sounds, but also because it's easy to find and relatively affordable, being from one the biggest pedal company in the

www.freestompboxes.org

I remembered reading about this integrated BD-2 project, and in this he says the tonestack being max bass and mids, minimum treble.

TSC in the web

In this website, if you set it as such you can see a similar curve as in the blue pilot post.

 

[eh là bas ma]

The plot in yellow is the Fender tone stack with the controls dimed

Looks like the yellow curve is the closer one to the BD-2 red curve. What values are these ? What do you mean by dimed ? Even the Bass knob is "dimed" ?

Are you in contradiction with Chuck D. Bones, Analogisnotdead and B. Wampler ?

 

[swyse]

This is getting even more confusing : Chuck analysis is in contradiction with both articles :



I still wonder who is right ? Brian Wampler, Analogisnotdead, or Chuck D. Bones ?

well the "mid capacitor" c3 on the website posted above isn't grounded out, so it can't be set to minimum so I would argue it depends on what size mid pot you have. The BD-2 uses a 15k resistor here, which is bigger than a 10k pot as shown in the website example TMB fender stack, but if its a 25k mid pot like in a 5f6 bassman then 15k/25k is 0.6 so I'd say it depends on which TMB tonestack you're looking at.

 

[eh là bas ma]

I'd say it depends on which TMB tonestack you're looking at.

Good point, that would explain all the contradictions. Thanks !

Is the BD-2 tonestack based on a specific Fender amp, or is it just "Fender-type" ?

 

[ICTRock]

the treble pot in the fender tone stack is a voltage divider between signal and ground. in the bd-2 that voltage divider is 330K series resistance to the signal and 0R to ground. Both the Bass and Mid controls are variable resistors rather than voltage dividers. Consult the Fender AB763 layout and the treble knob position would be fully CCW and the bass and mid knobs would be fully CW.

 

[eh là bas ma]

Consult the Fender AB763 layout and the treble knob position would be fully CCW and the bass and mid knobs would be fully CW.

I agree that there is a lot of bass, but isn't the BD-2 supposed to be kind of flat on the mids ?

 

[Harry Klippton]

Consult the Fender AB763 layout and the treble knob position would be fully CCW and the bass and mid knobs would be fully CW.

Why on earth would anyone ever set an amp like this?

 

[eh là bas ma]

Why on earth would anyone ever set an amp like this?

The Melvin's maybe ? Wouldn't it be a good setting for stoner metal ?

 

[owlexifry]

i feel like this tool should be consulted for this discussion

TSC in the web

 

[ICTRock]

Why on earth would anyone ever set an amp like this?

well you see it was the 90s and I was enjoying Mexico's finest brick ... and while noodling around on my blues deville I decided I'd turn the treble all the way down and the bass and mids all the way up and play delta blues riffs ... only Boss would think that would sound amazing with a treble booster into it.

 

[jesuscrisp]

Bass on max, treble at zero, mids at half depending on how you look at it or what value pot you see as "standard".