Dumb question about my Traynor YBA-3...

[Din Of Win]

/embarassed


I did some searching, but couldn't find a good answer...


What EXACTLY do the 'Presence' knobs do?

I set everything flat all the time and haven't done much 'tweaking'... but, if i knew what i was listening for, it'd help a ton...

[Madcity Fats]

The presence knob on any amplifier typically boosts the upper mid-range frequencies. The result is that your instrument cuts through a bit better, or sounds more "present" in the mix.

As far as I know (mind you, I'm not an electronics engineer), there are differences in design and there's no set standard for what frequencies get boosted. I would suspect a presence knob on a guitar amp is doing something a bit different than the one on a bass amp, but the intent is the same.

[okcrum]

Looking at the YBA-3A schematic, it looks like the presence control provides a variable center frequency midrange cut. It works interactively with the bass expander control. It looks like it will work from about 200 Hz to about 1.2 kHz over its range.

[Din Of Win]

Originally Posted by okcrum

Looking at the YBA-3A schematic, it looks like the presence control provides a variable amount of high mids boost and cut,

Oh, right on!

roughly centered at 2.1 kHz.

Lost me here


Thanks, though! (Madcity Fats, too)

[okcrum]

Originally Posted by Din Of Win

Oh, right on!



Lost me here


Thanks, though! (Madcity Fats, too)

Ignore that last bit, the number was wrong.

It's a variable mids cut, from low mids to roughly high mids. The bass enhance control will affect it some too.

[jastacey]

On my YBA3's I get the most effect when the controls are set at: Treble expander-7, Treble-5, Bass-7. Bass Expander 8 ... it basically makes the mids sharper when the control is past 5, it makes the sound more rounder below 5 ...when everything is set flat is sounds like it has no effect ... it works good with a sealed cabinet, when using a ported cabinet, it sounds like it has no effect ... that's been my experience with the YBA3's

[Crabby]

I found that I really didn't need to tweak much on the YBA-3 as it sounded sweet no matter how it was set. The presence control was hard to figure out but did seem to interact with the other controls. I sold her this year but it sure was a neat amp.

[recreate.me]

I thought the YBA 3 had passive controls? Which means no boosts in freqs, so essentially you can only take away from the sound, so 10s are flat.

I noticed on my YBA 3 that it made the high mids stand out more as it was turned up. I usually kept it around 3 or 4.
Bass at 6 bass expander 8, treble 5 treble expander 7 presence 3/4 Vol between 6-8, master never got over 4 haha

[turk26]

The Bass Expander circuit is active in the latter versions of the YBA-3's. The Treble and Bass pots, plus the Teble and Bass Boost switches are passive.