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The Glacier

 

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glacier

[/ˈglāSHər/]

–noun

an extended mass of ice formed from snow falling and accumulatingover the years

and moving very slowly, either descending from highmountains, as in valley glaciers, 

or moving outward from centers ofaccumulation, as in continental glaciers.

 

The Apex Glacier is our take on a small portable headphone amplifier/DAC.

 

Features:

 

Pictures

Click on the photos for a full resolution version

 

Reviews

review from our friend Chris Martens..

A review from Headphonia

...and Audio-Head

Measurements and Specifications

NOTE:  Please read the page about headphone & amp specs!

Values are typical.   Measured running from the interbnal battery.

Frequency response: DC to >100kHz, ±1dB; 20Hz - 20kHz ±0.1dB @ 1V out

Maximum output: >2.6V RMS into 150Ω; >1.7V RMS into 32Ω

Output source impedance:  Approximately 2Ω

THD+N: 0.005% @ 1V RMS out, 20Hz - 20kHz into 150Ω

Broadband noise:  <10μV RMS, unweighted, integrated over 20Hz - 20kHz

Output DC offset: <5mV

Input impedance: 10kΩ

Maximum input level: 2V RMS

Channel tracking (gain difference between channels, all volume steps): <±0.2dB

Maximum gain:  0dB, 10dB, or 20dB, ±<0.5dB

Dimensions: 114mm long x 65mm wide x 9mm thick

 

FFT: (1V RMS @ 1kHz into 33 ohms and 150 ohms):

 

Frequency response (1V into 33 ohms and 150 ohms):

 

 

 

THD+N vs. frequency (1V into 33 ohms and 150 ohms):

 

 

THD+N vs. input voltage (20dB gain, so output = 10x input) (1kHz into 33 ohms and 150 ohms):