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HeadRoom Micro Amp

MSRP $349.00
This product is no longer available for purchase.

Plug your best headphones into the HeadRoom Micro Amp and hear all the music you've been missing. Designed with high-end audio sensibilities and built to conveniently save space on your desk, the Micro packs 'Class-A'-biased electronics plus all the switching center control features needed for audiophile listening into a tiny 3" X 5" footprint. HeadRoom Micro Amp features two analog inputs; our famous HeadRoom crossfeed for superb headphone imaging; 3-position gain control to precisely match headphone impedance; and rear panel volume-controlled output for powered desktop or computer speakers. Made in Montana USA.

Reviewed by LA Audio File, May 2010

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Product Features:

  • Delivers high fidelity headphone audio with discrete component Jung 'Diamond' buffer output amplifier design
  • Improves headphone imaging with our famous HeadRoom crossfeed circuit
  • 3-position gain switch optimizes amp for headphones of different efficiencies
  • Switch between two independent analog line inputs!
  • Includes volume controlled pre-amp out for desktop computer speakers

What's In The Box:

  • (1) Standard 'Brick' Power Supply (please indicate 120v North American OR 220v for overseas voltage)


Want to bring your personal music listening experience to an entirely new level of sound quality? Simply put a Micro Amp between your music source and your favorite headphones and let the beautiful music flood in. Designed to bring fine audiophile electronics into in an affordable space-saving little amp, the HeadRoom Micro Amp is ready to inhabit any tiny nook on your desktop, nightstand, or any other listening place where you have access to AC power.


Sure, it sounds great driving headphones to glorious heights of musical detail and accuracy, but the HeadRoom Micro Amp is also a fully-featured pre-amp. The 1/8" (3.5mm)  'pre-amp' jack on the rear panel can double as a volume-controlled output to a power amp, computer speakers on your desktop or to your powered bookshelf speakers. Due to its tiny dimensions, The Micro Amp uses 'mini' 1/8" (3.5mm) connectors and smaller controls for input and output connectivity. We employ 'Class A'-biased electronics and a discrete-component Walter Jung 'Diamond Buffer'-based amplifier output. The Micro is a true Class-A, DC-coupled amp (no capacitors in the signal path) so you know the sound will drive even the most power-hungry audiophile headphones effortlessly and with total precision. Thanks to a pair of seperate 3.5 mm analog inputs, the Micro Amp can connect to a couple anaolg sources, and switch between them with the front mounted input selector switch. Front panel Gain control switch allows you to adjust the overall power output to easily control headphones of any impedance and efficiency rating. And, of course, our famous HeadRoom Crossfeed circuit centers the audio image on headphones.


The Micro is enclosed in an amazingly sturdy and lustrous black anodized aluminum enclosure with urethane bezels (the rubber piece around the front and back panel). The bezels handily act as bumpers protecting the amp, and they allow you to securely stack the Micro Amp and the Micro DAC units together. All HeadRoom Micro Amps are hand-built in Montana, USA.


A standard 120-volt AC power-supply 'brick' comes included with the HeadRoom Micro Amp. International customers can select a 220vac power supply for international or overseas voltages for a $50 upcharge. Also, a nicely upgraded international-use Astrodyne Power Supply is optionally available for audiophiles wanting to fully maximize the audio performance of the Micro Amp. The Astrodyne works anywhere on the planet you can find an outlet [from 100V ~ 240V] so it makes a great accessory for frequent travelers. Plus, the Astrodyne also improves upon the sound quality when compared to the standard 'brick' power supply.

*The Micro Amp does NOT include any interconnect cabling. To hook up your Micro Amp to a portable audio player, you will need a mini 1/8"-to-1/8" (3.5mm) interconenct cable. We recommend the Cardas 6 inch or 12 inch mini to mini cables. For longer runs, we suggest the Cardas 1 meter or 2 meter versions. If you are using an audio source with RCA outputs, the Straightwire 0.5 meter MusiCable cable will work great, or simply browse all of our cables.


The Micro Amp is 1.75" (3.8cm) high, 3.5" (9 cm) wide, and 4.75"(11.5cm) long. It weighs only 8.8oz (250 grams). The HeadRoom Micro Amp is hand-built in Bozeman Montana USA.


  • Weight: 8.8 oz (250 grams)
  • Dimensions: 3.5" x 4.5" x 1.5"
  • Frequency Response: 10–50k, ±0.3
  • THD at 1V output: <.002%
  • Input Impedance at 1kHz (ohms): 70k
  • Amplifier Group: The Micro Line
  • Home Use: yes
  • Warranty: 2 Years
  • Output Impedance: 0.5 ohm
  • Output Voltage: 10Vrms

Additional Resources:

Reviews At A Glance
27 Reviews
3 Reviews
1 Reviews

Average Rating 
(Showing 3 of 31 reviews)

Best value in Headphone amps IMO.
Posted by MaxOMan from Detroit, Mi on 2013-11-05

Recommend Product: Yes
Pros: We'll balanced neutral sound
Cons: None

Used with my Fostex TH 900 Headphones. Great stereo imaging.

4 out of 4 people found this review helpful. Did you?

Excellent amp!
Posted by BW from Bozeman, MT on 2013-08-15

Recommend Product: Yes
Pros: Sound, footprint, value

I replaced an old Headroom Mini with a combination of a Micro Amp and Micro DAC - what a great upgrade! The sound stage is broad (especially with Shure 535s), sound is crystal clear, there's plenty of air.

7 out of 7 people found this review helpful. Did you?

HeadRoom Micro Amp
Posted by Jazzman from Germantown TN on 2013-07-13

Recommend Product: Yes
Pros: Adjustable Gain, Sound, Size
Cons: No RCA Inputs, Tiny Print

My 1st headphone amp, using it to drive AKG Q701s. Amp isn't fully broken in yet, but sound is good; amp definitely benefits from being plugged into a power conditioner, makes the gain selection option between medium or high an easier choice; but then again a power conditioner benefits most equipment.

6 out of 6 people found this review helpful. Did you?

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