Aune B1s Portable Headphone Amp Review – Class A Amp

Welcome to my review of the new Aune B1s Portable Headphone Amp. The Aune B1s was sent to me by Aune to evaluate.

The Key Specifications

– Frequency response (from 10 Hz to 20 kHz): ±0.02dB
– THD + n: 0.00015% @300Ω
– SNR: 124dB @300Ω
– Crosstalk: <110dB @300Ω
– Max output: 6.443Vrms 18.4dBu(10Hz to 20kHz)
– Headphone output power: @300Ω 84mW , @600Ω 42mW ,@32Ω 74mW
– Class-A: 25mW/16R 50mW/32R
– Size: 125×65×18(mm)
– Weight:230g

For the review of the Aune B1s a range of headphones were used. Sennheiser HD579, HD598 HD660s, Sennheiser Momentum in ears, Sony XBA-1 Balanced Armatures, Fiio F9 Pro in ear and Beyer Dynamic DT770 Pro 80 and 250 ohm headphones.

Genres tested included rock, pop, classical, blues and jazz.

The main video part of the review covers off the sound in more detail along with the results using the above headphones.

In summary, warmer headphones like the Sennheiser sounded much nicer and were a good match. The Sony XBA-1 sound awful.

Using the Aune B1s allowed for plenty of power to drive my Beyers DT770 Pro, both the 80 and 250 ohms. The same applied to the over ear Sennheiser.

Where the pairing worked, more detail and soundstage occurred. Jazz and blues genres in my opinion worked the best.


The Aune B1s is a neutral sounding amp and therefore its pairing is best suited to warmer sounding headphones. Otherwise the sound lacks excitement as it is so neutral.

Useful Links

Best selling Aune products on Amazon UK


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