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RAAL-requisite

RAAL VM-1a Variable Mode Vacuum Tube Ribbon Headphone Amplifier

Pre-Order Now: More will arrive late April
Updated Mar-29-2022

RAAL-requisite’s all new standalone ribbon headphone amp the VM-1a features a dedicated variable mode tube circuit design exclusively for driving ribbon headphones. Capable of operating in Ultralinear, Triode or Pentode mode, this top of the line amp delivers uncompromising performance RAAL's SR-1a rrheadphones.


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A great listen, every listen, with all that you'd expect form RAAL-requisite!

Our Take

This custom built amp features variable mode select for: Ultra-Linear, Triode, and Pentode Operation modes. This direct drive vacuum tube amplifier is compatible with all of RAAL-Requisite’s ribbon headphones. It has selectable SR-1a open-baffle compensation and CA-1a non-compensation for both outputs. It also has a 24-step precision attenuator which is ideal for precise channel matching. On top of that, it has transformer balanced inputs (left/right) and outputs for simultaneous dual headphone operation. Toroidal output transformers and the toroidal power transformer are all magnetically shielded and epoxy cased. Lastly, the amp allows you to select between 115V and 230V voltages, which is great for those who want to use the amp in different regions of the world.

Ultra-Linear

Power Output: 15W

• Bandwidth Frequency Response: 20Hz - 70kHz, -3dB

Triode

Power Output: 10W

• Bandwidth Frequency Response: 10Hz - 70kHz, -3dB

Pentode

Power Output: 20W

• Bandwidth Frequency Response: 30Hz - 50kHz, -3dB

Specifications

Input Tube: 1x Tung-sol GTB 6SN7 Dual-Triode

Splitter/Driver Tubes: 2x Apex Matched Mullard EL34

Output Power Tubes: 4x Apex Matched Mullard EL34 Quartet

Input Impedance: 50K ohms

Input Sensitivity: 2V

Distortion: < 1%

S/N Ratio: 72dB

Weight: ~29lbs

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About RAAL-requisite

RAAL-requisite represents two legendary brands in ultra high-end audio, coming together, to create a sound unlike anything the world has ever heard before.