Bart 3-band electronics

[TCube]

Gard,
What are the center frequencies and widths of the 3 bands on the Bartolini 3-band eqs?

I haven't been able to find the answer on this Forum, but I apologize if this is a re-hash.

Also, how do I go about getting the specs for my SKB 3006 (SN: 4575).

Thanks!

[Gard]

Originally Posted by TCube

Gard,
What are the center frequencies and widths of the 3 bands on the Bartolini 3-band eqs?

I haven't been able to find the answer on this Forum, but I apologize if this is a re-hash.

Also, how do I go about getting the specs for my SKB 3006 (SN: 4575).

Thanks!

Sorry, but we don't have the exact information you're looking for. We're just not that much of a group of "techies" that we worry about stuff like that, we just know what works/sounds good, and what doesn't! I went and looked at the Bartolini site (www.bartolini.net) and didn't get any real information about it there either, sorry.

Here's what I found in our system for your bass:

SKB 3006
Quilt Maple top
Swamp Ash body
Red finish
Bartolini 3-band preamp
Spalted Purpleheart fingerboard
Ivory nut
Black hardware

[TCube]

Gard,
Thank you for looking into the Bart EQ and for digging up the info on my new baby so quickly.

[Halftooth]

I'm pretty sure that the mid frequencies at 250 and 800, and those are those important ones that I like to know.

[TCube]

Hi Halftooth,
Thanks for your response, but I'm a bit confused. There are three bands on the EQ, presumably, low, mid, and high (right???). I agree that 250 and 800 Hz are important midrange frequencies, but there's only one mid knob. So which of those two frequencies does mid knob control? (BTW my Roscoe hasn't been delivered yet, so maybe your answer would become obvious once it's in hand.)
Good to meet you, by the way.

[maurilio]

the mid ctrl is a push/pull. down is 800hz, up 250hz. the low is 30hz and the high should be 10khz (but Bartolini has different info about this, in some diagrams it shows 6khz!).

M

[TCube]

Ok. Now that makes sense.

I also just found out from Gard at Roscoe that you cannot control the 250 and 800-Hz bands independently of one another (it's a 3 band EQ, not a 4-band).

[Gtrslngr]

Originally Posted by TCube

Ok. Now that makes sense.

I also just found out from Gard at Roscoe that you cannot control the 250 and 800-Hz bands independently of one another (it's a 3 band EQ, not a 4-band).

I'm still experimenting/trying to figure out the MID push/pull thing. It seems that if I pull it out when its cut the volume drops and if I pull it out while boosted the volume increases. I hear more difference in volume than tone when pulled out. Is it supposed to control high mids when out and low mids when in?

[Basso Gruvitas]

Originally Posted by Gtrslngr

I'm still experimenting/trying to figure out the MID push/pull thing. It seems that if I pull it out when its cut the volume drops and if I pull it out while boosted the volume increases. I hear more difference in volume than tone when pulled out. Is it supposed to control high mids when out and low mids when in?

Pushed in, it boosts or cuts the upper mids (800Hz). When pulled out, it boosts or cuts the lower mids (250Hz).

Much of a bass' tone and character is from the mids. Your ear hears these frequencies most (see "Fletcher Mundson curve" -- sorry for the bad spelling), so you're not turning down the volume, you're putting a big ol' scoop in the mids when you turn them down. Same thing with the mid boosting - you are accentuating frequencies that your ear hears most Prevalently.

Hope this helps.

[Big Mother]

Originally Posted by Basso Gruvitas

Pushed in, it boosts or cuts the upper mids (800Hz). When pulled out, it boosts or cuts the lower mids (250Hz).

Much of a bass' tone and character is from the mids. Your ear hears these frequencies most (see "Fletcher Mundson curve" -- sorry for the bad spelling), so you're not turning down the volume, you're putting a big ol' scoop in the mids when you turn them down. Same thing with the mid boosting - you are accentuating frequencies that your ear hears most Prevalently.

Hope this helps.

Nail on the head.

[Gard]

John got it exactly! Mids are the strongest frequency for human hearing, so cutting them even a little kills percieved volume, boosting them a bit will have the opposite effect.

Side observation/rant:

WHY do so many bassists "scoop" their mids???? WHY WHY WHY WHY?????



Hello!!! Guess what, the guitar is GONE under 300 hz, the bass drum is not doing any business over about 100-120 hz...there's a great huge GAP for you to be present in, and every time I go see a bassist that I can't hear, it's because either he has the "smiley face" EQ on his amp, or the soundman has sabotaged him in a like fashion in the mix.



Hey, midrange is our FRIEND! Use it (don't ABUSE it)!!!

Kill the smiley face EQ!!! Sucking your midrange out sucks YOU out of the mix!!!

...OK, sorry 'bout that...rant over...

[Shiveringbass]

+1000 with you Gard. I've never understood that smiley face eq thing that reduce you to vibrations and clics.


Mids are our friends and IMHO, that's the reason why Roscoe cut so well in the mix.

Regards

Ludo

[JOME77]

Originally Posted by Gard

John got it exactly! Mids are the strongest frequency for human hearing, so cutting them even a little kills percieved volume, boosting them a bit will have the opposite effect.

Side observation/rant:

WHY do so many bassists "scoop" their mids???? WHY WHY WHY WHY?????



Hello!!! Guess what, the guitar is GONE under 300 hz, the bass drum is not doing any business over about 100-120 hz...there's a great huge GAP for you to be present in, and every time I go see a bassist that I can't hear, it's because either he has the "smiley face" EQ on his amp, or the soundman has sabotaged him in a like fashion in the mix.



Hey, midrange is our FRIEND! Use it (don't ABUSE it)!!!

Kill the smiley face EQ!!! Sucking your midrange out sucks YOU out of the mix!!!

...OK, sorry 'bout that...rant over...

So Gard,.........want to tell us how you really feel 'bout mids?

It's just like the good ole USA........the Mid-Class carries America!

Upper and lower America don't pay no stinking taxes!!!

[Gtrslngr]

Originally Posted by JOME77

So Gard,.........want to tell us how you really feel 'bout mids?

It's just like the good ole USA........the Mid-Class carries America!

Upper and lower America don't pay no stinking taxes!!!

Thanx,
I enjoy the tone of some serious midrange growl meself. Have any of you ever seen Trans-Siberian Orchestra before? I got good seats for the RBC show tonight here in Raleigh.

[nosajwp]

I noticed something strange on my 3007...even when the mid control is set flat at the detent, the tone changes some when you pull the mid knob out. I would have figured it wouldn't change if the level was set to 0.

Slinger...I'm jealous...I'd love to see TSO!!!

[Williamsburgjim]

..I was going to ask this same question (just did a search and found this old thread). But with my midrange pot, it seems the opposite (800-out; 250-in). Anyone else have this issue?

Without testing it against an amp with a graphic EQ, I get more of a Fender J tone when it's pulled out... .

Maybe I'm just going crazy... .

Jimbob

[JOME77]

Originally Posted by Williamsburgjim

..I was going to ask this same question (just did a search and found this old thread). But with my midrange pot, it seems the opposite (800-out; 250-in). Anyone else have this issue?

Without testing it against an amp with a graphic EQ, I get more of a Fender J tone when it's pulled out... .

Maybe I'm just going crazy... .

Jimbob

It's certainly possible that it's wiried backwards All of mine have been with the low freq out. IMO it's not worth rewiring (since you know how it operates).

[Nidan]

For any one interested see http://www.webervst.com/fm.htm for a detailed description of the Fletcher-Munson curve

[VroomVroom]

FWIW, mine has the low frequency 'out' as well. I find it a bit helpful in some rooms, but in general I prefer to keep that knob...like all of the others...centered.

Great info in this thread, though - good read, folks. Thank you!