For years I've been pretty happy with the sound of my Hot Rod Deville 410 (1998 USA model) by replacing the v1 with a 12AY7 (ECC83S) tube and v2 with a 12DW7 in V2, and using a volume box in the effects loop. This allowed me to play the clean volume around 7-8 for a little preamp breakup, and keep the overall SPL down to about 90db or so -- my personal sweet spot where the speakers are working and there's effective feedback between the guitar and the amp. But I'd never heard the amp with power amp saturation. I accidentally stumbled on to a long thread in the Marshall Forum (was not a regular browser there as I'm totally Fender-based) in which the author, @JohnH, described his journey to design and build a "perfect" attenuator with the simple goal to massively reduce the volume of powerful Marshall 50W amps but with negligible tone loss. He succeeded brilliantly, and in his thread, he shares his ideas and evolving schematics. I'd encourage anyone interested in attenuators to spend some time there, especially after about page 10, when he starts making significant progress with what he called Attenuator M. Please pay attention though to what John requests should you consider building your own (not for business purposes, for example). http://www.marshallforum.com/threads/simple-attenuators-design-and-testing.98285/ So I built one and this thread will attempt to show just how well it works, and also try to demonstrate the real tonal capabilities of the Hot Rod Deville amp, which as all of us know, is generally either loved or loathed. Quick summary for those who don't want any detail: there is almost no perceptible tone loss at all caused by the attenuator, even when going down to the maximum level of attenuation of -31.5db which is true bedroom level; obviously at bedroom level the speakers aren't really pushing much air and isn't my preference; the HRDv is excellent for clean tones and as a pedal platform, particularly with Fender guitars (no surprises), and is pretty decent for classic rock tones but not exceptional (without pedals). Just for fun, I"ll also add some thoughts on the BassBreaker 15 as a comparison.