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

Experience Unequalled Tone, Texture, and Detail in Your Music with the RAAL VM-1a Ribbon Headphone Amp

Tube-Rolling flexibility to enhance music to your preferences
(x3) Variable operation modes: Ultra-Linear, Triode, and Pentode
Paired with the SR-1a headphone, provides crazy detail with natural and organic tone and cohesive sound-stage
Extremely well-built for longevity and easily serviceable

From RAAL-requisite
This is RAAL's new flagship amplifier for ribbon headphones. Featuring user selectable Triode, Pentode and Ultra-Linear operating modes. This top of the line amp delivers uncompromising performance with RAAL’s SR-1a headphones. Truly a joy to experience.
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, great for those who want to use the amp in different regions of the world.
Specifications
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

General


Input Tube: (x1) Tung-sol GTB 6SN7 Dual-Triode

Splitter/Driver Tubes: (x2) Apex Matched Mullard EL34

Output Power Tubes: (x4) Apex Matched Mullard EL34 Quartet

Input Impedance: 50K Ω

Input Sensitivity: 2V

Distortion: < 1%

S/NR: 72dB

Weight: ~29lb