GEAR DATABASE
AmpRX Brown Box – Sweeten The Tone And Protect Your Amp? [Plus D&M Blow The Lights Out]
Published 15 August 2025
Duration:
00:49:46
Do you need to control the voltage to your amp?
Welcome to the show! We’ve been intrigued by the AmpRX Brown Box ever since we first saw it. It’s a voltage attenuator (not regulator) designed to sit between your amp and the mains AC from the wall. Via stepped voltage attenuation increments, the idea is that you can find an ideal mains voltage for your amp. Why? We discuss all that in the video…
We also stumbled into a blown mains fuse when hammering two amps and making wild voltage changes, the reasons for which we discuss with Cassandra Sotos and Clark Singleton from AmpRX at the end of the video.
For the record, we’ve been running amps on the Brown Box ever since with no issues whatsoever. Please don’t be put off - the mains fuse is there as a protection. It was just doing its job.
Enjoy the show!
Pedals & Stuff used in this show
• TheGigRig Three2One
• TC Electronic Poly Tune Mini 3 Noir
• Dinosaural Cogmeister
• Keeley Andy Timmons Halo Dual Echo
• The GigRig ABY Baby
If you use these links to buy stuff - any stuff – we receive a small cut.
UK & Europe: Andertons Music - https://bit.ly/3zaTX5Z
USA: Sweetwater - https://sweetwater.sjv.io/5g6ALN
Australia: Pedal Empire - http://bit.ly/2mWmJQf
Interesting bits and go to sections…
0:00 Intro & intro playing
1:05 What are we doing today?
1:50 Brown Box - what and why?
4:45 Voltage variance and current draw today
6:45 AC30 & Brown Box, Tele
8:40 AC30 - what do we think?
9:45 Mick’s gig experience with it
11:07 AC30 & Brown Box, ES-335
13:05 AC30 conclusions so far
14:00 Setting the AC30 at 225V in the amp
15:27 Ooh, something is happening now
18:25 Dan on how much he loves the AC30
19:22 Let’s try the Marshall 100
20:20 Different voltages with the Marshall
22:10 Turning the Marshall up, Tele
23:55 What we heard in the Marshall
25:14 More loud Marshall, ES-335
29:00 What we heard in the Marshall 2
30:40 Spiky loud vs nice loud?
32:30 AC30 clean & crunch
32:55 Both amps on with the Brown Box
34:30 Ans then we blew a fuse!
35:25 What happened then?
37:20 Conclusions so far
39:35 Cassandra & Clark from AmpRX
Guitars in today’s show
• Gibson Memphis 1958 ES-335 - Mick’s video here: https://www.youtube.com/watch?v=Ha82vk1wLyA&ab_channel=ThatPedalShow
• Fender Custom Shop ’63 Telecaster - Dan’s video here: https://www.youtube.com/watch?v=rnQ4OIJFTgY&ab_channel=ThatPedalShow
Amps in today’s show
• 1988 Marshall 1959 Model Super Lead and Marshall 1960B cabinet with Celestion G12-65 speakers
• 1961 Vox AC30 with Celestion Alnico Blue speakers
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