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Massdrop CTH + SDAC DAC/Amp

Massdrop CTH + SDAC DAC/Amp

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The Best of Both Worlds

The Massdrop CTH + SDAC DAC/amp brings two of the community’s favorite designers together in one affordable, easy-to-use package. It features the Massdrop x Alex Cavalli Tube Hybrid Amp (or CTH), built from the ground up by the founder of Cavalli Audio—a legend in the world of headphone amps. For the DAC section, it uses the Massdrop x Grace Design Standard DAC (or SDAC), a collaboration with a company long known for its incredibly accurate, transparent studio gear. The result is an all-in-one unit that measures objectively well and works with a variety of driver types and impedances, including all previous Massdrop over-ear headphones.

Note: This item is in stock and will ship within 1 business day. Your payment method will be charged 2 hours after joining. Cancellations are accepted until that time. The drop will launch and end each day to collect purchases.

Massdrop CTH + SDAC DAC/Amp
Massdrop CTH + SDAC DAC/Amp
Massdrop CTH + SDAC DAC/Amp
Massdrop CTH + SDAC DAC/Amp

About the Massdrop x Grace Design Standard DAC

The Standard DAC sets a new standard in entry-level DACs. Designed with the objectivist audiophile in mind, the SDAC delivers objectively good performance meant to meet or exceed the measurements of the popular ODAC while retaining many of its other benefits. It’s equipped with the new AKM AK4452 digital-to-analog conversion chip and can process the most common file types up to 24 bit/96 kHz with no harshness or edge and the kind of resolution and detail that’ll make you want to listen on and on. It runs off of USB bus power with plug-and-play operation, which means you won’t need drivers or any special software to get started.

Massdrop CTH + SDAC DAC/Amp
Massdrop CTH + SDAC DAC/Amp

About the Massdrop x Alex Cavalli Tube Hybrid Amp

This hybrid amp combines a solid state section, a tube amp section, and an entirely new circuit design. A complete revision of one of Cavalli’s early DIY designs, 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.

Massdrop CTH + SDAC DAC/Amp
Massdrop CTH + SDAC DAC/Amp
Massdrop CTH + SDAC DAC/Amp

Reviews & More


DAC Section

  • Massdrop x Grace Design
  • DAC chip: AKM AK4452
  • Audio formats: Up to 24 bit/96 kHz
  • Frequency response, 20Hz–20 kHz: +/-0.02 dB
  • THD+N at 20 Hz -0.15 dBFS: 0.0013%
  • THD+N at 100 Hz, -0.15 dBFS: 0.0013%
  • THD+N at 10 kHz, -0.15 dBFS: 0.0024%
  • IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k: 0.0005%
  • IMD SMPTE -6 dBFS, 24/96k: 0.0015%
  • Noise, A-weighted:  -105 dBu
  • Dynamic range, A-weighted: >114 dB
  • Linearity, -90 dBFS: -0.07 dB
  • Crosstalk at 1 kHz, -10 dBFS (3.5mm jack): -102 dB
  • Sum of jitter components at 11,025 Hz, -1 dBFS: -133 dB
  • Maximum output:  2.15VRMS
  • USB controller: XMOS XU208-128-TQ64
  • Input: USB micro
  • Output: 3.5mm TRS
  • Power: USB Class 1 (no drivers required for Windows, Mac, or Linux)

Amp Section

  • Massdrop x Alex Cavalli
  • 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 (12 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


  • Chassis material: Anodized aluminum
  • Dimensions: 8.3 x 9.1 x 2.2 in (21 x 23 x 5.7 cm)


  • 6922 dual-triode vacuum tube
  • Power supply
  • Cloth storage bag
  • Massdrop 1-year warranty


All orders will be shipped by Massdrop.

Estimated ship date is Dec 18, 2018 PT.

Your payment method will be charged 2 hours after purchase. Cancellations are accepted until that time, after which the request will be submitted to vendors to deliver the best delivery time to members, making all sales final. Be sure to check the discussion page for updates.

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