Massdrop x Alex Cavalli Hybrid Headphone Amp

Massdrop (Drop) Alex Cavalli Hybrid Headphone Amp
Headphone Amplifier I'm the original owner.  I've too many amps!!!  Sounds clean, crisp, and lovely.
from drop.com Built from the ground up by Alex Cavalli, a legend in the world of headphone amps, this hybrid amp combines a solid state section, a tube amp section, and an entirely new circuit design. It delivers the current required by planar magnetics, along with the voltage drive that dynamic headphones need to perform their best. It’s quiet enough for sensitive headphones like the Massdrop x Fostex TH-X00 and powerful enough for higher-impedance headphones like the Massdrop x Sennheiser HD 6XX. With the supplied 6922 vacuum tube, the sound is smooth, natural, and resolving with precise detail and just a touch of tube character. And at this price, this amp is an easy addition to any desktop setup—especially when you consider that Cavalli’s desktop amps start at $800, and his tube amps at $3,500.
SPECS Massdrop x Alex Cavalli Chassis: High-grade CNC-milled aluminum with bead-blasted finish, silicone pads on feet Frequency response: 20 Hz–20 kHz, -0.2 dB Maximum power, 50 ohms: 1W Rms per channel Output impedance: < 0.5 ohm at 1 kHz THD: < 0.008%, 20 Hz–20 kHz 1 Vrms THD: 0.0014% at 1 kHz, 1 Vrms with 50R load IMD: 0.002% CCIF 1 Vrms SNR: -97 dB, 20 Hz–20 kHz (1 Vrms into 45 ohms) Crosstalk: -85 dv at 1 kHz Topology: Capacitor-coupled tube hybrid using 6922 tube, single-ended Gain: 8x (18 dB) Input: RCA Output: 4-pin XLR, ¼ in (6.3 mm) TRS headphone jacks Protection: Delayed start with muting relay and DC offset detection Power supply: Wall wart with 28V DC 1.25A Power consumption: Maximum 35W (28V, 1.25A), ~9W idle Dimensions: 8.3 x 9.1 x 2.2 in (210 x 230 x 57 mm) Weight: 3.6 lbs (1,625 g) Individually serialized
INCLUDED 6922 dual-triode vacuum tube Cloth storage bag Switching power supply that handles 100–240 VAC (add plug adapter for your country’s outlet)