Presence pot placement

[soje]

This might be a dumb newbie question, but here it goes:

How often do you use the presence pot? Would it be sensible to place on the back of the amp, to save space on the front?


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Ducks, covers.....


Regards
Soje

[heisthl]

Interesting topic, recently I've been using either a DPDT on-off-on on the rear panel or a rotary 4 pos on the front panel. I like to offer an off position that disconnects the 4 ohm tap completly (not good for clean headroom) and for the typical 1uf/2kpot circuit, either go straight through (knob on 10) or pad it by 200 ohms (knob on . For the rotary I simulate knob on 7 and knob on 8.5, along wilth full on and off. The 200 ohm value is good if you are not going to offer a control at all.

[soje]

...so this is not something anyone changes "on stage"?



...ducks again.....gonna shot 'em

Regards
Soje

[heisthl]

A lot of players like having a presence to set up for the room and/or make adjustments as the room changes. The problem is with players that don't understand how to use it, if you see the knob set below 5 (noon) the amp is probably not sounding it's best, yet 5 (noon) is the normal setting mentality for the plug and play crowd. By putting it on a switch it's either on, up or off.

[ic-racer]

I had a recent experience that now makes me think of the Dumble PRESENCE control as sort of a global single-knob tone control.

I was recently working on a Pioneer SA-6700 HiFi amp. This amp would be considered an 'integrated' amp (ie. a pre-amp and power-amp in one box) but it really has no preamp (except for the phono). It is basically a power amp with tone controls put in the negative feedback loop. In normal use the tone controls function like any those in any other HiFi amp.

For me it was interesting to see that you could put a whole tone stack in the NFB loop.

[Bob-I]

I have one amp with the presence knob on the back, as well as the loop send and return controls. I do find it a little confusing at times, and I turn it the wrong way, but since I usually set and forget my controls itn's not a big problem.