OTL Tube Headphone Amplifier / Preamplifier with USB DAC

This is where it all started for the Lab12. Dealing with the sensitive signal and transforming it into the true high-end potent audio headphone amplifier is not the task that everyone dares to explore. Though really challenging for us, our love for music and high- end audio was since back then really strong and unique.
Intimate high-end audio headphone listening offers one of the most coveted and intimate musical listening experience, yet not every headphone amplifier is THE headphone amplifier. This is why we took a different and more challenging path and designed Lab12 Hpa as full blooded OTL tube headphone amplifier with the utmost transparent, musical and emotionally engaging hearth. Although we could, we didn’t stop there. HPA is not only fully enclosed state of the art headphone system with included pure Lab12’s highest grade DAC, but it is also a fully operational, high quality preamplifier with multiple inputs, including USB. Hpa tube preamplifier alone encompass all of our knowledge and know how. It offers the performance that challenges preamplifiers of few times higher the price and brings remarkable emotional bound. As all Lab12 products, the HPA also comes with the choice of multiple luxury paint finishes.


• OTL tube headphone amplifier stage
• Blue Velvet ALPS Potentiometer
• Five separate regulated Power Supplies
• SRSG® implementation
• Gold plated Teflon rca connectors
• Gold plated tube sockets
• Analog retro nissei VU meter
• 5mm Aluminum face panel with luxury painting
• Five Years Guarantee


• Power: 210 - 240VAC 50Hz (110 - 120VAC 60Hz)
• Power consumption: 60 VA max
• Frequency response: 5 Hz to 100K Hz (-3dB)
• Input impedance: 50K ohm
• Recommended headphones impedance: 32-600 ohm
• Tube complement: 3x 6n1p dual triode
• Inputs: 2x line stereo (RCA connectors), 1x USB
• Preamp output: 1x line stereo
• Headphone output: 1x 6.3mm jack
• Available colours: Matt Black, Pearl White, Custom colour
• Dimension (WxHxD): 32x11x29 cm
• Weight: 6 Kg