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ETGTE
0
Sep 20, 2013
http://www.innerfidelity.com/images/HiFiMANHE400.pdf --- Impedance is ~ 50 ohms on these, and 90dB SPL is reached at a measly 0.33mW (by my shoddy math, ~94/95dB SPL per mW). The numbers say they should sound good with any amping at all.
Rayvolution
117
Sep 20, 2013
ETGTEI'm sure they do, but being planar magnetic they can take a LOT of wattage. I'm thinking of doing the speaker amp mod with a cable from BTG. http://www.head-fi.org/t/629352/he-500-lcd2-d5000-dt770-sr80-on-a-speaker-amp-emotiva-mini-x-a-100-project<br /><br />He used the HE-500 (which I'm considering turning these around once I get them and then getting the 500's from Razor Dog for $600.) However, the HE-400s would still work well with this mod as per reviewed in the thread.
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