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RE: Hafler HA-15 Solid State

I've owned the HA15 for six months. I use it with Beyerdynamic DT 1990 and Grado GH4 headphones. IMO, it brings out the best in both: powerful, tonally neutral, fast transients, highly transparent.

- The "Focus" (i.e. crossfeed) feature is fantastic with some recordings.
- The second headphone jack is nice if you have two sets of headphones with similar sensitivities.
- Balanced XLR and unbalanced RCA inputs, and a pair of RCA outputs for pass-through. The RCA out doesn't go through the Hafler circuits at all. In fact the HA15 doesn't need to even be running to use the RCA outs.

It's a bit too sensitive for the 32-ohm Grados, the volume pot stays below 9:00 unless you turn down the source level. It runs around 11:00 with the 250-ohm 104dB DT 1990, so lots left for less efficient headphones.



Edits: 05/01/20 05/01/20 05/01/20

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