My ampeg has an attenuator on board and it works great for me. It also has a bias switch so I can switch between 6550's and EL34's, works great for me.
...I spent a lot of money on other people's advice & opinions. Get a tone in mind & go for it. If you like the Fender/vintage/brown-sound the POD may be the one. I prefer something else. Hell! Just buy it from AMS! 45 day/100% money back.
Why can't Royston just pull power tubes until he gets a desired tone at a desired volume? I'm not familiar with the Fenders, but I know with most tube amps, you can just pull a couple of power tubes (in the correct sequence, of course) and lower the power rating while retaining the tone. Experts?????? Lets hear ya.
the pull tubes trick doesn't very opften give great results... some of the reasons (not all!);
your hearing is logarythmic bla bla. this means that going from 1 watt to 10 watt is , to the hearing, the same as going from 10 to 100watt. now my question is how do the volume controls work tehn? are they logarythmic too? as in from 0-1 is the same incerement as from 1-10... this kinda puzzles me...
second it's not just the sound from the powertubes it's the transformer and lotsa other equipment that makes the tone... some tech told me once the main reason hendrix had such an incredible toe was that his full blasting marshall overp[owered his transformer and that was the major distortion source...
tried it on a jcm2000 100watt but only made the sound raspier and harsher and no volume decrement... marshall told me to never try it again...
oh and one more; powertubes need to be removed by pair ... the outer OR the inner... so in a 100watt head with 4 el34 or 6l6 you can onlkychange wattage to a min of 50 watt and no less... 50 watt tube power is still FREAKIN' loud.