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Availability:
In Stock.
Arrives
Monday, Oct 5
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Features
- Powerful UAFX dual-engine delivers the most authentic '60s British tube combo sound ever placed into a stompbox
- Includes the world's best speaker cabinet, mic, and room tones derived from the award-winning OX Amp Top Box
- Features "hot rod" treble booster, preamp boost, and speaker swaps, plus free additional downloadable speaker cabinets and mics upon registration
- Bypass cabinet/mic emulations and use in front of your amp for added tonal flavor and overdrive sounds
- UAFX mobile app lets you customize footswitches, recall and archive your presets, unlock additional features, download artist presets, and more
- Timeless UA design and craftsmanship, built to last decades
Description
Stereo amp and cabinet emulation pedal with vibrato, room modeling, multiple speakers, cabinets, and boosts, live and preset modes, and customization with the UAFX mobile app
Brand: Universal Audio
Color: ruby red
Compatible Devices: Double Bass
Product Dimensions: 4"D x 4"W x 2"H
Item Weight: 562 g
Compatible Devices: Double Bass
Number of Bands: 3
Speaker Size: 12 inches
Power Source: External Power Supply
Output Channel Quantity: 2
Amplifier Type: Tube
Connector Type: USB
Color: ruby red
Item Dimensions D x W x H: 4"D x 4"W x 2"H
Item Weight: 562 g
Brand: Universal Audio
Model Name: Ruby
Number of Items: 1
Global Trade Identification Number: 32
UPC: 819937003332
Manufacturer: Universal Audio
Built-In Media: Pedal
Item Type Name: Stereo Amp & Cabinet Emulator
Model Number: GPM-RUBY
Mfr Part Number: GPM-RUBY
Warranty Description: 1 Year Manufacturer
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Oct 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Amplifier
It didn't sound exactly right to me at first. I had a friend let me borrow one, along with the Dream and Lion. Then I got to try the other cabs. The first of the extra cabs you get from registering is an ac15 cabinet mic'd with an SM57. That's the one that made me a believer as it sounds and acts identical to my ac15 now. It's uncanny. I did an A/B test with the Ruby using the ac15 cab, and my AC15 with a modern alnico blue into a torpedo captor, with a V30 cab sim. They were so close in that way that V30's sound like Blue's sound like Greens. There really isn't a huge difference between them. Close enough that if I did the work and hooked up an SM57 and used the blue in the AC15, I'm sure it's the same. To say this makes recording live guitar easier is an understatement. It's an important thing to understand about the Ruby though. I did try turning off their cab sim, and using my own after it. Suddenly it wasn't my AC15 anymore. The cab sims are a HUGE part of the sound in the Ruby. It's more than just a speaker choice. It's part of the output tube sound also. That said, it really loves BB style pedals and fuzz pedals. It loves the BE-OD and Suhr Riot. It adores all the fuzzes from EHX. The germanium boost on the normal channel is godly good. So you get a free one. It does mono in, stereo out, which is convenient for hooking up things. Their "room" delay people keep calling a reverb is ok, but it just made me want a better one. So I put a White Tape after it. Now i can make the room whatever size and shape I want. The Epitome seemed perfect for the Ruby since they are both flawless emulations. It's all the effects I need, other than an obnoxious phaser that can be in front of it. I am only using the Normal channel. This is my perfect pedal host. I might use the TB channel someday, but throwing some light chorus and reverb on the normal channel output sounds so good clean. It's a sound that makes you want to sell every fender amp you own. Brad Paisley could tell ya. You almost don't want to "buck hum" with it. The best sounds shine with hot single coils. The best complement I can pay a product is buying a backup. Well here I am buying one. Now that said... The Dream is outstanding. It might even be a better emulation. it's definitely a better pedal host, being more transparent with the cleans. You actually hear your pedals. Vox as a pedal host is accepting that you are going to get half your grit from the amp. You have to really want and like that sound. So if this is your first rodeo, and you are specifically looking for a pedal host, maybe get the Dream 65 instead or first. You get a fuller tone stack also, and a GODLY spring reverb that somehow sounds better than the real thing. I'm still "borrowing" one of those but I'm a weak man. The Lion, I love for what it is. it's clean tones are amazing. But I don't love the SLP sound enough to want it over vox + be-od, and I won't give up my vox cleans. That said, the Lion is probably the best choice for a gigging musician. It's the most versatile out of the box with nothing added. The new one, the Anti, I'm definitely snapping up at some point. So to wrap up, the tech works. It's kind of stunning. You can forget it's not the real thing. I've done it a few times. Turned to my left and spun a knob on my real AC15 then laughed at myself.
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Reviewed in the United States on September 20, 2024 by Cake Fighter
Style: Amplifier
I’ve often been a bit let down by “amp-in-a-pedal” gear, but this is an extremely authentic-sounding representation of a vintage AC-30 (I’ve played a number of them). Super practical for home recording and other situations where a loud amp isn’t logical.
Reviewed in the United States on April 4, 2026 by mark monteith
Style: Amplifier
The sound quality exceeded my expectations, Universal Audio did an incredible job bringing all those organic frequencies of having the real amplifier in front of you. I run it through a Roland Jazz Chorus 40 using the effects loop to replace its pre-amp. If you are thinking on getting one, it’s a no brainer, incredibly realistic tube tones without having to lift heavy equipment.
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Reviewed in the United States on May 23, 2025 by Pablo Medina
Style: Amplifier
Hands down the best guitar amp emulation I've ever played. The same build quality you expect when you buy a Universal audio product. Sturdy. This pedal is bigger than it seems in the pictures. the knobs are the actual size of real amp knobs if that gives any context. I'm an industry professional and have a decade of experience with guitar amps and tone. It takes some figuring out, but if you take the time to dive deep it's brilliant. The UI is pretty easy to understand, and the app helps with saving presets. My only complaint is that you can't control the pedal with the app. It would be nice to fine tune. Great work, UA!
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Reviewed in the United States on August 8, 2023 by Josh
Style: Amplifier
Sounds great, very Voxy. Great clean tones. Excellent tremolo. Vox overdrive can be over the top, so I run it near breakup with a drive pedal in front of it. The UA Dream pedal it also incredible if Fender Deluxe sounds are your thing.
Reviewed in the United States on January 26, 2024 by 62deluxe
Style: Amplifier
Responds like an amp. Cleans up nicely with your guitar's volume knob. Unlike the other two UA amp modelers, Ruby 63's got enough gain to be used as a stand alone overdrive/dist as well. I use the preset button as a volume booster. Works like a charm and pairs well with other pedals too – Happy user here!
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Reviewed in the United States on November 24, 2022 by SP
Style: Amplifier
Had a good tone but the noise was unbearable. I tried several things to quite it down and nothing worked. I returned it and bought another popular amp/cab simulator and had no noise at all using the same setup. If they can get the noise issues fixed this would be a good product. This was from 2023 for future reference.
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Reviewed in the United States on October 12, 2023 by S. W.
Style: Amplifier
Was sold a defective unit. Purchased almost 2 yrs ago, and kept it off my board bc I wasn’t bonding with the pedal, but wanted to keep it for future use with another pedal board. Come to find out after using a friend’s Ruby pedal, the one I held on to till now is defective. The pedal doesn’t power on correctly/consistently, all three channels are not operating like a normal pedal.
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Reviewed in the United States on April 8, 2026 by Donovan K.