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Universal Audio OX Guitar Amp Top Box Side View

Universal Audio OX Guitar Amp Top Box

SKU UA-OX-U
Save $200.00
$1,499.00
$1,299.00

Manufacturer's Warranty: 1 Year from purchase date

Universal Audio OX Amp Top Box – Ultimate Tube Amp Tone, Any Volume

Take your tube amp to its full potential without worrying about volume levels. The Universal Audio OX Amp Top Box is a next-generation reactive load box, giving you the freedom to push your amp to its sweet spot while keeping total control over output. Whether you're playing live, recording in the studio, or practicing at home, OX delivers legendary tube tone—without compromise.

Equipped with UA’s Dynamic Speaker Modeling, the OX Amp Top Box lets you explore a world of perfectly crafted mic and cabinet emulations. Resulting in stunningly realistic speaker breakup, resonance, and feel—just like a perfectly mic’d cab in a pro studio. Premium analog circuitry ensures your amp retains its full harmonic depth and dynamic response, making it a must-have accessory for guitarists who demand top-tier sound quality.

Instead of plugging into a traditional speaker cab, connect your amp to the OX Amp Top Box and unlock a new level of tone shaping and sonic versatility. Whether you're tracking in a silent studio environment or dialing in stage-ready sounds, this is the ultimate tool for cranked-amp tone at any volume.

Shipping

Shipping is FREE on all orders within the lower 48 states of the US.

We don't want to mess around with fine print and extra charges, we like things to be simple and easy. 

Want to know about our Returns Policy? Read more here.

Order Confirmation:

As soon as you place your order you will receive an order confirmation e-mail.  This means that we have received your order in our system and pre-authorised your credit card for the purchase.  

As soon as we receive your order we automatically check to confirm that your order is in stock and available for immediate shipment.  If your item is on back-order or unavailable we will void the pre-authorisation and reach out to you via e-mail to see if alternate arrangements can be made.  

If your item(s) are available for immediate shipment (within 3 business days) we will process the charges and get to work preparing your order for shipment.

Order Shipment:

If your order is in stock and we process the charges to your credit card it will ship within three business days from the date of your order.  

We will send you shipping confirmation within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  

If you do not receive shipping confirmation from us within four business days of your order feel free to follow up with us at sales@musicstox.com

International Orders:

Please be aware that our products are made specifically for the USA market only.

Damages:

Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery or do not agree to accept the delivery.

If you do accept delivery you are required to immediately take photos using your smart phone or camera of the damaged packaging or products inside the packaging. 

If your item(s) do arrived damaged, please lodge your return claim by sending an email and photos of the damaged item(s) to: sales@musicstox.com.

 

Buying gear online can feel like a big decision—we get it. That’s why we make it as easy and risk-free as possible.

Everything we sell is inspected before shipping, plus with free shipping, secure payments, and a 45-day hassle-free return policy, you can shop with confidence.

The team at MusicStox is here to assist you, regardless of your level of experience, so let's get you the perfect setup—without the stress.

  • Shipping is FREE on all orders within the lower 48 states of the US.
  • Price Match Guarantee.
  • Easy 45-Day Returns. 
  • Great Service. We pride ourselves on the best service, anywhere.
  • Your Satisfaction Guaranteed. We handpick our products for quality, we know you'll love them. But if there is ever something wrong, we'll fix it.

A Beautifully Designed Software Experience

Seamlessly connected via Wi-Fi, the app lets you tweak, save, and recall hundreds of RIG presets directly from your iPad, Mac, or Windows 10 device. Dial in your perfect amp and cab combination, adjust mic placement, and craft your dream tone—all with an interface that feels as smooth as it sounds.

Realistic Speaker Breakup & Authentic Cone Cry

What sets the Universal Audio OX Amp Top Box apart? Its ability to capture the true, organic response of a real speaker cabinet—including the complex dynamics of speaker breakup and cone cry.

It reacts to your playing nuances, giving you the same expressive feedback and response as a fully cranked cabinet—without the ear-splitting volume.

Universal Audio OX Amp Top Box – Key Features

  • Reactive Load Box – Lets you run your tube amp at its sweet spot while controlling volume
  • Dynamic Speaker Modeling – Captures the organic movement and breakup of real speakers
  • Extensive Cabinet & Mic Models – Access a wide range of professionally captured tones
  • Cranked-Amp Tones, Any Volume – Achieve the perfect drive without excessive loudness
  • Customizable "Rig" Controls – Store and recall six mic, cab, and FX combinations
  • "Room" Control – Adjust the natural ambiance of your virtual speaker setup
  • Footswitch Input – Expand your control with external switching options
  • Selectable Impedance – Compatible with 4-, 8-, and 16-ohm amps
  • Built-In Effects – Fine-tune your sound with EQ, compression, delay, and reverb
  • Silent Practice Mode – Headphone output for private playing sessions
  • Pro-Quality Recording Outputs – Balanced line and S/PDIF digital outs for studio use
  • Wi-Fi Remote Control – Use the OX app on Windows, Mac, or iPad for seamless adjustments
  • Wi-Fi Compatibility – Requires a 2.4 GHz network (5 GHz not supported)
Free shipping
45-Day Hassle-Free Returns
Questions about gear?

Call 888-443-5234

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The G300 is an amazing guitar for the price, it arrived in perfect condition and the delivery was fast. Highly recommend!

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Terry.E

Universal Audio OX Amp Top Box – Ultimate Tube Amp Tone, Any Volume

Take your tube amp to its full potential without worrying about volume levels. The Universal Audio OX Amp Top Box is a next-generation reactive load box, giving you the freedom to push your amp to its sweet spot while keeping total control over output. Whether you're playing live, recording in the studio, or practicing at home, OX delivers legendary tube tone—without compromise.

Equipped with UA’s Dynamic Speaker Modeling, the OX Amp Top Box lets you explore a world of perfectly crafted mic and cabinet emulations. Resulting in stunningly realistic speaker breakup, resonance, and feel—just like a perfectly mic’d cab in a pro studio. Premium analog circuitry ensures your amp retains its full harmonic depth and dynamic response, making it a must-have accessory for guitarists who demand top-tier sound quality.

Instead of plugging into a traditional speaker cab, connect your amp to the OX Amp Top Box and unlock a new level of tone shaping and sonic versatility. Whether you're tracking in a silent studio environment or dialing in stage-ready sounds, this is the ultimate tool for cranked-amp tone at any volume.

Shipping

Shipping is FREE on all orders within the lower 48 states of the US.

We don't want to mess around with fine print and extra charges, we like things to be simple and easy. 

Want to know about our Returns Policy? Read more here.

Order Confirmation:

As soon as you place your order you will receive an order confirmation e-mail.  This means that we have received your order in our system and pre-authorised your credit card for the purchase.  

As soon as we receive your order we automatically check to confirm that your order is in stock and available for immediate shipment.  If your item is on back-order or unavailable we will void the pre-authorisation and reach out to you via e-mail to see if alternate arrangements can be made.  

If your item(s) are available for immediate shipment (within 3 business days) we will process the charges and get to work preparing your order for shipment.

Order Shipment:

If your order is in stock and we process the charges to your credit card it will ship within three business days from the date of your order.  

We will send you shipping confirmation within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  

If you do not receive shipping confirmation from us within four business days of your order feel free to follow up with us at sales@musicstox.com

International Orders:

Please be aware that our products are made specifically for the USA market only.

Damages:

Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery or do not agree to accept the delivery.

If you do accept delivery you are required to immediately take photos using your smart phone or camera of the damaged packaging or products inside the packaging. 

If your item(s) do arrived damaged, please lodge your return claim by sending an email and photos of the damaged item(s) to: sales@musicstox.com.

 

Buying gear online can feel like a big decision—we get it. That’s why we make it as easy and risk-free as possible.

Everything we sell is inspected before shipping, plus with free shipping, secure payments, and a 45-day hassle-free return policy, you can shop with confidence.

The team at MusicStox is here to assist you, regardless of your level of experience, so let's get you the perfect setup—without the stress.

  • Shipping is FREE on all orders within the lower 48 states of the US.
  • Price Match Guarantee.
  • Easy 45-Day Returns. 
  • Great Service. We pride ourselves on the best service, anywhere.
  • Your Satisfaction Guaranteed. We handpick our products for quality, we know you'll love them. But if there is ever something wrong, we'll fix it.