$50 Value

What you get? A pot and four posts.

Bravo V2 // Tube Headphone Amplifier

Not only do you get an exposed tube, but a capacitor, also.

Acryllic like that on a VPI Turntable.
Glass like that on your iPhone (though not scratch resistant).
A 12AU Tube.

AU is gold, don't you know. (AU is gold).
http://en.wikipedia.org/wiki/Gold

https://www.touchofmodern.com/sales/bravo-audio/bravo-v2-tube-headphone-amplifier

Product Details
— Input Power: DC24V
— Input Sensitivity: 100mV
— Input Impedance: 100KOhm
— Out-Put Impedance: 20~600 Ohm
— Gain: 30dB
— Frequency response: 10Hz-60KHz +/- 0.25dB
— Signal/Noise Ratio: >90dB
— Dynamic range: 84.6dBA(300 ohm) 89.8dBA(33 ohm)
— THD: 0.016%(300 ohm) 0.45%(33 ohm)
— IMD + Noise: 0.045(300 ohm) 0.42(33ohm)

• ColorsTransparent
• MaterialsAcrylic, Aluminum, Copper, Glass
• Measurements4.13"L x 3.15"W x 2.16"H

Shipping

• Shipping AvailabilityUSA
• Shipping PolicyStandard Ground Shipping
• Estimated Delivery 2-3 weeks ?
• Return PolicyFinal sale, not eligible for return