Portaphile MICRO

Rated 5.00 out of 5 based on 2 customer ratings
(3 customer reviews)


Three Channel Design, Isolated Output Ground, Four Layer PCB, 3 x OPA627Au, 6xBUF634′s, Jung Multiloop Topology, Powered by Single 3.7V Lithium Ion (Battery is rated for 500 Charges), Voltage Increased Internally to over 18Vpp, Power Adapter/Charger Included (5V), Runs 4 Hours on a full charge, Battery charges in 2.5 Hours when Amplifier is charged while off, External Hi/Low Gain Switch ( 7/2), Small Size, Elna Cerafine Caps, Instruction Sheet



Available on backorder

SKU: Portaphile Micro Category:


The Portaphile MICRO is a smaller version of our highly regarded original 627 portable headphone amplifier.   The original 627 was widely considered one of the top performing portable headphone amplifiers available.  I decided to make two changes to it, make it smaller and offer USB charging.   The MICRO measures just 3.49″L by 2.6″W by 0.71″H excluding the knob which adds another .62″ to the length.   I also decided to upgrade the cosmetics by milling the front and back panels.    Each panel is milled out of a quarter inch solid block of aluminum and takes between 3 to 4 hours per panel.  The milling work in each amplifier alone is about 6 to 7 hours.  The panels are then shipped out to get Type 3 annodized in black.   Type 3 is a hard surface that resist scratches.  As you can see from the pics, all of the lettering is milled and isn’t silkscreened on.    The rest of the case has a nice powder coated finish that  is friendly to stacking.

Once you get past how nice the exterior is,  the inside is what truly makes a Portaphile amplifier live up to it’s name.   The front end are 3 Burr Brown OPA627APs and are followed a total of 6 Burr Brown Buffers (2 per channel).   Reviews can be found here.

Handcrafted 100% in the USA.

Please email me anytime if you have any questions.  I will look forward to hearing from you.


Ships in 10 to 14 days from the time you place your order.



4 Responses to “Portaphile MICRO”

  1. PortaphileAdmin March 2, 2022 at 3:29 am #

    Yes it is!

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