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Drop + THX AAA 789 Linear Headphone Amplifier - Desktop Amp with Balanced XLR and Single-Ended RCA Inputs

4.5 out of 5 stars 83 ratings

Price: $320.00 & FREE Returns
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Brand DROP
Connections Wired
Model Name DROP + THX AAA 789
Color Black
Headphones Form Factor Headphone Amplifier

About this item

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  • THE WORLD’S MOST LINEAR AMPLIFIER — Announced at CES 2018, the Drop + THX Achromatic Audio Amplifier (THX AAA) 789 is a linear bipolar amplifier with feed-forward error correction
  • FATIGUE-FREE LISTENING — 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.
  • THX AAA TECHNOLOGY — Capable of driving any headphones, including high-impedance, high-current, and high-sensitivity types, the THX AAA 789 amp transmits the original audio in its purest possible form.
  • ADDITIONAL FEATURES — Each channel of the THX AAA 789 amp is equipped with a low-bias class-AB main amplifier and an auxiliary error-correction amplifier, the former providing the majority of the power and the latter providing a realtime low-power error-correction signal.
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From the manufacturer

Drop + THX AAA 789 Massdrop headphone amplifier wired XLR 1/4" input output

THE WORLD’S MOST LINEAR AMPLIFIER

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.

Drop + THX AAA 789 Massdrop headphone amplifier wired XLR 1/4" input output

THX AAA TECHNOLOGY

Capable of driving any headphones, including high-impedance, high-current, and high-sensitivity types, the THX AAA 789 amp transmits the original audio in its purest possible form. That’s thanks in large part to THX AAA technology, which reduces harmonic, intermodulation, and crossover distortions. Virtually every conventional amplifier distorts significantly when driving current into a headphone, producing crossover distortion that fatigues the listener. 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.

ADDITIONAL FEATURES:

Each channel of the THX AAA 789 amp is equipped with a low-bias class-AB main amplifier and an auxiliary error-correction amplifier, the former providing the majority of the power and the latter providing a realtime low-power error-correction signal. These work together to null all distortion components. Additionally, the product’s low quiescent current minimizes wasted power. Finally, the THX AAA 789 has multiple gain level settings to optimize for headphone and earphone listening.

Drop + THX AAA 789 Massdrop headphone amplifier wired XLR 1/4" input output

ABOUT THX LTD.

Founded by legendary filmmaker George Lucas in 1983, THX Ltd. and its partners provide premium entertainment experiences in the cinema, in the home, and on the go. Over the past 30 years, THX has expanded its certification categories beyond studios and cinemas to consumer electronics, content, and automotive systems. Today, THX continues to redefine entertainment, providing exciting new technologies and assurance of experiences with superior quality and high performance that ensure the artist's vision is truthfully delivered to audiences worldwide. Fun fact: Composed by Lucasfilm sound engineer Dr. James “Andy” Moorer and screened at the start of the 1983 premiere of Star Wars: Episode VI - Return of the Jedi, THX Deep Note remains one of the most recognizable sonic identities to this day.

Drop + THX AAA 789 Massdrop headphone amplifier wired XLR 1/4" input output

SPECS

  • 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)

INCLUDED

  • Switching power supply that handles 100–240 VAC (US plug; adapter needed for global use)

Massdrop X Alex Cavalli CTH Massdrop x Alex Cavalli Liquid Carbon X AMP Massdrop CTH + SDAC DAC/AMP Massdrop Liquid Carbon X + SDAC DAC/Amp Drop THX AAA Massdrop Massdrop Objective 2 Headphone Amp: Desktop Edition
Massdrop X Alex Cavalli CTH Massdrop x Alex Cavalli Liquid Carbon X AMP Massdrop CTH + SDAC DAC/AMP Massdrop Liquid Carbon X + SDAC DAC/Amp Drop + THX AAA 789 Linear Amplifier Drop Objective 2 Headphone AMP: Desktop Edition (Standard)
Component Type: Compact Tube Hybrid Amp Solid-State Amp Compact Tube Hybrid Amp + SDAC DAC Solid-State Amp + SDAC DAC THX Achromatic Audio Amplifier Desktop Amplifier
Frequency response: 20 Hz–20 kHz, -0.2 dB 20Hz–20 kHz: +/-0.02 dB 20Hz–20 kHz: +/- 0.02 dB + 0.01 dB / - 0.03 dB 20 Hz–20 kHz; + 0.05 dB / - 0.15 dB 10 Hz–50 kHz +/-0.1 dB (20 Hz–20 kHz)
Maximum power: 50 ohms: 1W Rms per channel Balanced 2.8W RMS into 50 ohms, single-ended 0.7W RMS into 50 ohms 50 ohms: 1W Rms per channel Balanced 2.8W RMS into 50 ohms, single-ended 0.7W RMS into 50 ohms Balanced: (16 ohms): 6000 mW - (600 ohms): 400 mW. Sindle-Ended: (16 ohms): 3000 mW - (600 ohms): 100 mW (33 ohms): 613 mW - (600 ohms): 88 mW
Output impedance: < 0.5 ohm at 1 kHz ~0.12 ohm balanced, ~0.08 ohm single-ended < 0.5 ohm at 1 kHz ~0.12 ohm balanced, ~0.08 ohm single-ended Balanced: < 0.1 ohms / Single-Ended: < 0.05 ohms 0.54 ohms
Gain: 8x (18 dB) 1x (0 dB) and 3x (10 dB), hot switchable from front panel 8x (12 dB) 1x (0 dB) and 3x (10 dB), hot switchable from front panel Balanced: 0.66x , 2.0x, 6.6x (-4, +6, +16 dB) / Single-Ended: 0.33x , 1.0x, 3.3x (-10, 0, +10 dB) 2.5x and 6.5x / 1.0x and 3.3x (select your configuration)
Input: RCA 1 x XLR (balanced), 1 x RCA DAC: USB Micro; Amp: RCA DAC: USB micro; AMP: 1 x XLR (balanced), 1 x RCA Stereo XLR-3 gold-plated Neutrik; Stereo RCA gold-plated RCA
Outputs: Output: 4-pin XLR, ¼ in (6.3 mm) TRS headphone jacks 1 x 4-pin XLR, 1 x ¼ in (6.3 mm) TRS headphone jacks DAC: 3.5mm TRS; Amp: 4-pin XLR, 1/4 in (6.3 mm) TRS headphone jack DAC: 3.5mm TRS; AMP: 1 x 4-pin XLR, 1 x ¼ in (6.3 mm) TRS headphone jacks 1/4 in (6.35 mm) TRS gold-plated Neutrik; 3.5 mm TRS gold-plated; XLR-4 balanced gold-plated 6.35 mm
Power Supply: Wall wart with 28V DC 1.25A: Switching power supply that handles 100–240 VAC (add plug adapter for your country’s outlet) Switching power supply that handles 100–240 VAC (add plug adapter for your country’s outlet) Wall wart with 28V DC 1.25A Switching power supply that handles 100–240 VAC (add plug adapter for your country’s outlet) 24 VDC inline brick, universal input 100–240 VAC Battery (not included) or AC adapter (included, select 110V or 220V)
Dimensions: 8.3 x 9.1 x 2.2 in / (210 x 230 x 57 mm) 8.3 x 9.1 x 2.2 in / (210 x 231 x 56 mm) 8.3 x 9.1 x 2.2 in / (210 x 231 x 57 mm) 8.3 x 9.1 x 2.2 in / (210 x 231 x 57 mm) 8.3 x 9.1 x 2.2 in / (210 x 230 x 57 mm) 4.12 x 3.87 x 1.12 in / (105 x 98 x 29 mm)
Weight: 3.6 lbs (1,625 g) 3.6 lbs (1,625 g) 3.4 lbs (1,520 g) 9 oz (255 g)

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Product description

Announced at CES 2018, the Drop + THX Achromatic Audio Amplifier (THX AAA) 789 is a 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. THX AAA TECHNOLOGY: Capable of driving any headphones, including high-impedance, high-current, and high-sensitivity types, the THX AAA 789 amp transmits the original audio in its purest possible form. That’s thanks in large part to THX AAA technology, which reduces harmonic, intermodulation, and crossover distortions. Virtually every conventional amplifier distorts significantly when driving current into a headphone, producing crossover distortion that fatigues the listener. 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.


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5.0 out of 5 stars Cleanest Amp Ever
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3.0 out of 5 stars Neutral and bright
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