Let customers speak for us
makes my old Princeton sound better than ever
Such a great device to dial in my tube amps
I use this after my power conditioner to lock in the voltage for my Ampeg Heritage bass tube amp. We play in a lot of places with improper voltage and this is providing for consistent input voltage to my amp.
This is a "must have" piece of gear. I was getting ~123v out of the wall, which was not ideal for my modern stuff, and even worse for my new-to-me pre-CBS Bassman. Glad I got this; now I run it every time I plug in.
I’m thrilled with it. I’ve resisted getting one because I didn’t want to carry another device around, but it really sweetens up the tone of my amplifiers. I wish I’d bought one years ago.
Knobs tend to work loose after agjustments.
An amazing product. Anyone who owns vintage audio gear should have one…or MORE!
Wow - 114-115v for my 65 Tremolux made a HUGE difference in tone! I'm a believer.
This product has brought my tweed Fender Super, Blackface Twin Reverb, Valco and Danelectro amps back from the storage facility.
I have played electric guitar and bass for over 55 years, I remember how these, above mentioned, amplifiers should sound like and also perform like. Now, with The Brown Box, I am playing my vintage amps again. They have great tone and reliablity. That makes me happy. Thank you
Works great to stabilize input voltage for an older SuperLead
Required equipment for any tube amp. Built like a tank, these look as good as they perform!
The plate voltage on my vintage silver panel Deluxe Reverb is now in a safe range. I feel comfortable running vintage power tubes and it sounds so good. It has just the right amount of sag that was previously missing. Thanks AmpRx!
Yes, I know it's only January, but investing in my amp with a Brown Box was the smartest decision I've made in a long time. Thanks AmpRx. Now I'm safe and secure!
My wall voltage is anywhere from 118v to 129v. I've found my Two Rocks to sound ideal biased at 30ma idle per tube.. Well, if the wall is 128v when I bias to my preferred 30ma per tube, and the next time I play the wall is 120v, my tubes are only idling at 27ma… enough to notice a little stiffness, with less smooth high end, so I’m messing with the gain and EQ trying to find the tone from the night before.
Now I set my Brownies to 120v,, bias the amps, and keep it at 120v. My amps always sound great. I turn my amps on and the tone is there…every time. So I can spend my time playing and not tweaking.