Optimal voltage for superior tube-amp tone!
If you want to get the best possible sound from your tube amp, then you need an AmpRX Backline 1200 voltage attenuator.
All tube amps (especially vintage tube amps) are designed to run at an optimal voltage, and standard 120V/AC wall current is typically too high for vintage tube amps, as well as some modern designs.
With its proprietary 10-amp transformer and flexible attenuation options, the Backline 1200 brings that current down to an optimal level for significantly improved performance.
The Backline 1200 accommodates two tube amplifiers, making it ideal for musicians who run a pair of heads in a rackmount.
Safe, effective, and easy to use.
Another benefit of running your amp at optimal voltage is that your tubes will usually last much longer.
The Backline 1200 is far safer and more effective than any standard Variac, because it limits the input voltage and attenuates the output voltage.
Figuring out your amp's optimal voltage is as easy as Googling the specs, and the Backline's onboard output voltmeter lets you see exactly what you're pulling.
The Backline's four voltage-reduction modes let you get as close to optimal as possible, and there's a bypass setting so you can A/B the results!
AmpRX Backline 1200 Power Attenuator features:
• The perfect way to optimize the input voltage for 2 tube amps!
• Dramatically improves your amp's performance by providing optimized voltage.
• Optimal input voltage also extends the life of your high-performance power tubes.
• LCD voltmeter makes it easy to dial in the optimal setting for your amp.
• Selectable input current setting ensures safe and accurate operation.
• Choose from 4 attenuation modes (3%, 4%, 6%, and 10%) to fine-tune your voltage.
• Bypass mode lets you easily A/B the results of your optimized amp voltage.
• 2U rackmount design is great for musicians who run a pair of heads in a live-in rack case.
Specs
| Type | Attenuator |
| Condition | New |
| Power Handling | Up to 1200W |
| Manufacturer Warranty | Lifetime |
| Country of Origin | United States |
FREE SHIPPING
- Free shipping within Canada.
- Free shipping to the USA.
- Free shipping on international orders over 520$.
Visit the Shipping page for more.
Fast Delivery
- Canada : 1 - 2 business days
- USA : 1 - 2 business days
- Rest of the world: 3 - 5 business days.
Hassle-Free Returns
You have 45 days to test your new gear. If you choose to return it, we’ll send a full refund. It’s that simple: no bogus restocking fees or charges.
Visit the Returns page for more.
Frequently Asked Questions
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How can I tell if an item is in stock? +
Each product page shows an availability status.
• In stock items are ready to ship.
• Out of stock items are currently unavailable.
You can enter your email to be notified when an item is back in stock.
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Where are you located? +
We’re based in Blainville, Quebec, Canada.
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When will my order ship? +
Orders placed before 12 PM EST ship the same business day.
Tracking details are sent shortly after purchase.
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How much does shipping cost? +
Most orders ship free to Canada and the US.
International orders ship free on purchases over $520 CAD.
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Which shipping methods do you use? +
Orders ship via UPS Expedited by default.
For faster delivery, you can select UPS Express Saver at checkout.
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How long does shipping take? +
Typical delivery times are:
• Canada: 2–3 business days with UPS Expedited, 1 business day with UPS Express Saver
• USA: 2–3 business days with UPS Expedited, 1 business day with UPS Express Saver
• International: 3–5 business days with UPS Expedited, 2–3 business days with UPS Express Saver
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Which payment methods do you accept? +
We accept all major credit cards and PayPal.
Financing options are available through Klarna and RBC PayPlan.
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Do Canadian customers pay sales tax? +
Yes. Sales tax is applied based on your province of residence:
• Alberta: 5%
• British Columbia: 5%
• Manitoba: 5%
• New Brunswick: 15%
• Newfoundland and Labrador: 15%
• Northwest Territories: 5%
• Nova Scotia: 14%
• Nunavut: 5%
• Ontario: 13%
• Prince Edward Island: 15%
• Quebec: 14.975%
• Saskatchewan: 5%
• Yukon: 5%
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Do USA customers pay import fees? +
Yes. Starting August 29, 2025, all US-bound shipments will be subject to duties, taxes, and brokerage fees.
These charges are determined by US Customs and collected by UPS at delivery.
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Do international customers pay import fees? +
Yes. International shipments may be subject to duties and taxes.
These charges are set by the destination country’s customs authority and collected by UPS at delivery.