The MHA150 Headphone Amplifier is a worthy successor to the critically-acclaimed MHA100. The MHA150 contains the same feature set and performance standards but adds our new 2nd generation digital-to-analog converter (DAC) that provides support for DSD and DXD files to give you access to the latest in digital music.

Like the MHA100, the MHA150 continues to take advantage of unique McIntosh technologies to create the best possible personal listening experience regardless of the headphones you use. Our Autoformer™ technology found in our large mono and stereo amplifiers has been adapted to produce three headphone impedance ranges of 8-40, 40-150 and 150-600 Ohms so that every headphone will receive the legendary McIntosh sound quality and performance.

For enjoying DSD and DXD files, the USB input accepts PCM signals up to 32-bit/384kHz and supports DSD64, DSD128 and DSD256 along with DXD 352.8kHz and DXD 384kHz. Our proprietary MCT input has also been added to the MHA150; when paired with the MCT80 SACD/CD Transport, it offers a secure DSD connection for playback of the high definition audio on SACDs.

HEADPHONE OUTPUT SPECIFICATIONS

• Headphone Power Output

  High Selection: 1W
  Normal Selection: 250mW

• Headphone Output Impedance

  8-40 Ohms
  40-150 Ohms
  150-600 Ohms

ELECTRONIC SPECIFICATIONS

• Power Output per Channel

  50 Watts

• Speaker Impedance

  8 Ohms

• Rated Power Band

  20Hz to 20kHz

• Total Harmonic Distortion

  0.005%

• Intermodulation Distortion

  0.005% maximum, if the instantaneous peak power is 100 watts or less per channel with both channels operating for any combination of frequencies from 20Hz to 20kHz

• Dynamic Headroom

  1.5dB

• Frequency Response

  +0, -0.5dB from 20Hz to 20kHz
  +0, -3dB from 10Hz to 100kHz

• Sensitivity (Unbalanced)

  300mV

• Sensitivity (Balanced)

  600mV

• Maximum Input Signal (Unbalanced)

  8V

• Maximum Input Signal (Balanced)

  16V

• Signal To Noise Ratio

  105dB

• Input Impedance (Balanced / Unbalanced)

  25K/25K

• Damping Factor

  >150

• Preamplifier Output

  3V (8V maximum)

• Preamplifier Output Impedance

  500 Ohms

• Voltage Gain

  36.5dB

• Power Guard

  <2% THD with up to 16dB overdrive at 1kHz

CONNECTIVITY

• Headphone Output

  1/4" High Drive with Headphone Crossfeed Director (HXD®)

• Balanced Input

  1

• Unbalanced Input

  1

• Digital AES/EBU Input

  0

• Digital Coaxial Input

  1

• Digital Optical Input

  1

• Digital MCT (DIN) Input

  1

• Digital USB Input

  1

• Preamplifier Output

  1

DIGITAL AUDIO SPECIFICATIONS

• Digital AES/EDU Input Sample Rate

  N/A

• Digital Coaxial Input Sample Rate

  16-bit, 24-bit - 32kHz to 192kHz

• Digital Optical Input Sample Rate

  16-bit, 24-bit - 32kHz to 192kHz

• Digital MCT (DIN) Input Sample Rate

  16-bit, 24-bit - 32kHz to 192kHz

• Digital USB Input Sample Rate

  16-bit, 24-bit, 32-bit - 32kHz to 384kHz

CONTROL

• Tone Controls

  5 Step Bass Boost Control: 0 to +12.5dB (in 2.5dB steps) @ 40Hz

• Power Control Input

  1

• Power Control Output

  1

GENERAL SPECIFICATIONS

• Output Meters

  Yes

• Vacuum Tube or Solid State

  Solid State

• Power Requirement

  120V 50/60Hz, 1.5A

• Standby Power Requirement

  <0.25 Watts

• Output Type

  Autoformer™ for Headphones
  Direct Coupled for Speakers

WEIGHTS & DIMENSIONS

• Dimensions (W x H x D)

  11-1/2" (29.2cm) x 5-7/8" (14.9cm) x 14-5/8" (37.1cm)

• Weight

  26.5 lbs (12 kg)

• Shipping Weight

  32.5 lbs (14.8 kg)