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 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 brings that current down to an optimal level for significantly improved performance. The rackmountable Backline accommodates two tube amplifiers, making it ideal for musicians who run a pair of heads in a live-in rack case. It's also great for bass players who need lots of overhead for their power-consuming rigs.Safe, effective, and easy to use
Another benefit of running your amp at optimal voltage is that your tubes will usually last much longer — something many of us

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AmpRX Backline Power Station - 2U 1200-watt

2U Rackmount 10A Input AC Voltage Attenuator for 3 Tube Amplifiers, with LCD Voltmeter, 4 Selectable Input Voltages, 4 Selectable Output Voltages, and Bypass

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 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 brings that current down to an optimal level for significantly improved performance. The rackmountable Backline accommodates two tube amplifiers, making it ideal for musicians who run a pair of heads in a live-in rack case. It's also great for bass players who need lots of overhead for their power-consuming rigs.

Safe, effective, and easy to use

Another benefit of running your amp at optimal voltage is that your tubes will usually last much longer — something many of us here at Sweetwater who've paid a pretty penny for new-old-stock tubes can appreciate. The Backline 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 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
  • 10-amp, 120/122/124/126VAC input settings accommodate most wall currents
  • Equal or attenuated output ensures that you can't accidentally overload your amp
  • 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
SpecificationDetail
Type Voltage Attenuator
Power Handling 1200W @ 120V AC (10 amps)
Inputs Multiple Primary Voltages; 120V, 122V, 124V, 126V
Outputs 3 x AC grounded outlets, Reduction Select 3%, 4%, 6%, 10%
Power Source Standard IEC AC connector

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