Drop + THX AAA 789 Audiophile Headphone Amplifier

Description

“Used  in working order. See pictures.  It has a small cosmetic ding on the left/back side. (see the picture)
Announced at CES 2018, the Drop + THX Achromatic Audio Amplifier (THX AAA™) 789 is a linear bipolar amplifier with feed-forward error correction.
It’s designed for objectivists who appreciate an incredibly clean, transparent amp—the sought-after “wire with gain” whose amplification is wholly uncolored by a sound of its own. Made in collaboration with THX Ltd., it features the company’s groundbreaking
THX AAA and feed-forward topology, which reduce distortion by 20 to 40 dB for realistic, fatigue-free listening. In fact, this bridged-output amp’s performance figures speak for themselves: It’s powerful (2 x 6W at 32 ohms) and quiet (136 dB SNR) with a record-low THD of -140 dB at 300 ohms, 100 mW. That’s four times the power of the Objective 2 amp, for example, with far less distortion.
The engineers at THX set out to solve this problem—and to deliver the performance of a class-A amplifier without the heat and weight—and THX AAA technology was born.
more detail https://drop.com/buy/drop-thx-aaa-789-linear-amplifier
#2
The
USPS same day shipping in the double box only in lower US states.
-4 Pin XLR Balanced
-TRS Single Ended 1/4" Phone Plug
-TRS Single Ended 3.5mm Phone Plug
3 Position Gain Knob
Protective Circuits
No Break in Necessary
SPECS
General
All parameters measured at 0 dB gain, 1 kHz, with balanced inputs and 300-ohm load unless otherwise noted
Inputs: Stereo XLR-3 gold-plated Neutrik; Stereo RCA gold-plated
Outputs: 1/4 in (6.35 mm) TRS gold-plated Neutrik; 3.5 mm TRS gold-plated; XLR-4 balanced gold-plated
Frequency response: + 0.01 dB / - 0.03 dB 20 Hz–20 kHz; + 0.05 dB / - 0.15 dB 10 Hz–50 kHz
Input impedance: 50 kOhms balanced or unbalanced
Chassis: High-grade CNC-milled aluminum with bead-blasted finish
Power supply: 24 VDC inline brick, universal input 100–240 VAC
Dimensions: 8.3 x 9.1 x 2.2 in (210 x 230 x 57 mm)
Weight: 3.4 lbs (1,520 g)
Balanced Output
Output power: 6000 mW, 16 ohms, <1% THD (watts per channel)
Output power: 6000 mW, 32 ohms, <1% THD (watts per channel)
Output power: 800 mW, 300 ohms, <1% THD (watts per channel)
Output power: 400 mW, 600 ohms, <1% THD (watts per channel)
THD: -143 dB, 300 ohms, 1 mW: 0.000007%
THD: -140 dB, 300 ohms, 100 mW: 0.000010%
THD: -130 dB, 32 ohms, 1 mW: 0.000032%
THD: -130 dB, 32 ohms, 100 mW: 0.000032%
THD: -122 dB, 16 ohms, 1 mW: 0.000080%
THD: -122 dB, 16 ohms, 100 mW: 0.000080%
IMD: -123 dB, SMPTE 70 Hz + 70 kHz, 300 ohms: 0.000071%
IMD: -124 dB, DFD 18 kHz + 19 kHz, 300 ohms: 0.000063%
Crosstalk: -127 dB, 300 ohms: 0.000045%
Noise (A-wt): 2.4 uV, potentiometer at nil
SNR: 136 dB, 300 ohms, <1% THD
Gain: 0.66x , 2.0x, 6.6x (-4, +6, +16 dB), selectable via front switch
Output impedance: < 0.1 ohms
Single-Ended Output
Output power: 3000 mW, 16 ohms, <1% THD (watts per channel)
Output power: 1800 mW, 32 ohms, <1% THD (watts per channel)
Output power: 200 mW, 300 ohms, <1% THD (watts per channel)
Output power: 100 mW, 600 ohms, <1% THD (watts per channel)
THD: -143 dB, 300 ohms, 1 mW: 0.000007%
THD: -135 dB, 300 ohms, 100 mW: 0.000018%
THD: -135 dB, 32 ohms, 1 mW: 0.000018%
THD: -133 dB, 32 ohms, 100 mW: 0.000022%
THD: -130 dB, 16 ohms, 1 mW: 0.000032%
THD: -125 dB, 16 ohms, 100 mW: 0.000056%
IMD: -117 dB, SMPTE 70 Hz + 70 kHz, 300 ohms: 0.000141%
IMD: -125 dB, DFD 18 kHz + 19 kHz, 300 ohms: 0.000056%
Crosstalk: -90 dB, 300 ohms: 0.003162%
Noise (A-wt): 1.2 uV, potentiometer at nil
SNR: 136 dB, 300 ohms, <1% THD
Gain: 0.33x , 1.0x, 3.3x (-10, 0, +10 dB), selectable via front switch
Output impedance: < 0.05 ohms
SPECIFICATIONS
Inputs:
Stereo XLR-3 gold-plated Neutrik; Stereo RCA gold-plated
Outputs:
1/4 in (6.35 mm) TRS gold-plated Neutrik; 3.5 mm TRS gold-plated; XLR-4 balanced gold-plated
Frequency response:
+ 0.01 dB / - 0.03 dB 20 Hz–20 kHz; + 0.05 dB / - 0.15 dB 10 Hz–50 kHz
Input impedance:
50 kOhms balanced or unbalanced
Chassis:
High-grade CNC-milled aluminum with bead-blasted finish
Power supply:
24 VDC inline brick, universal input 100–240 VAC
Dimensions:
8.3 x 9.1 x 2.2 in (210 x 230 x 57 mm)
Weight:
3.4 lbs (1,520 g)