#1
I know Im not supposed to link to ebay but....
http://cgi.ebay.com/TUBE-AMP-VOLUME-BOX-for-FENDER-Hot-Rod-Deville-Deluxe_W0QQitemZ140221014716QQihZ004QQcategoryZ43375QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Do these work? Kind of the same idea as a power attenuator effect it goes in the effect loop instead of pre-speaker. Let you turn the power amp up and turn the preamp signal down before it goes into the power amp.
And a wise man once said:

"7 Strings are more brutal than 6"
#3
Will the amp sound any different with the power amp turned up and the this box controlling the overall volume?
And a wise man once said:

"7 Strings are more brutal than 6"
#4
That box comes before the power amp, so you'd need to turn the amp's volume down and that up.

You'd lose a lot of your preamp gain if you did that so it's not the same as having both.
A dwarf might hear you. What then?

My Music
#5
i see. Then how does an attenuator work? I thought they just decreased the volume of the signal between the head output and the cab?
And a wise man once said:

"7 Strings are more brutal than 6"
#6
An attentuator goes between the amp and the speaker, so you can turn the amp up so you're overdriving your power tubes and then take the volume level down to a reasonable level with the attentuator.

Using a master volume means that you're not pushing the power tubes as hard.

A dwarf might hear you. What then?

My Music
#7
Hilarious! It's just a pot-in-a-box, an EQ pedal without an EQ.

All the same, for $18 I guess it's okay if you want to put a volume pedal in your fx loop without fear of accidentally nudging the footswitch. In no way a serious alternative to an attenuator though.
#8
I just figured it out, if you turn the signal going into the power amp down with the volume box then its just like turning the post-gain down?
And a wise man once said:

"7 Strings are more brutal than 6"