Get tech support or a refund then.

I think I've already posted the FR chart showing no difference in FR between 252 and 717 with SR-007 at a very high 105 dB.

The 007 is more sensitive than other models according to its specs. On another forum, the 007 was level matched across different amps to a quite high 105 dB. There was no difference in frequency response between 252s and 717. It's time for big amp proponents to explain the value, and in clearer...

Headphones don't image as music is typically not made for them. Soundstage is a perception of the 3-7 kHz frequencies. Stax models are flatter than not so soundstage is much less present than DF compensated headphones. You can always jack up the soundstage with the ED-1 filter implemented in...

Recoat them + check solder joints if you can't organize paid service.

Can you speculate whether your L700 is ported?

Owners of the new series: Does your set have an acoustic seal?   Do they spit if you take them off quickly? Does bass extend completely?

   

  Not even the BHSE can 100% tame the new Lambdas.

  Carbon minimum.

Hi Michgelsen, The hum is coming from the unit while the sound output is completely clean. I just want to make sure the 323S transformer is not delaminating or something. Do Stax amps quietly hum or are they typically silent?

I've noticed a quiet hum coming from my 323S that I don't recall having heard before. Sound output is unaffected. It is powered from a 240-100 V 100 W rated toroidal transformer. Should I be concerned?

  I had a buzzy distortion when listening to the 307 at high loudness. I swapped the headphones back to front and it remained on the left side only. It's actually my left ear's acoustic reflex causing it to what I can tell.

  I've gotta tell you, my thoughts match yours. I bought the 3170 because I was suffering less with EQed Samsung buds than my dynamic pair. I was going to feed the Stax a DF EQ and be happy with an accurate, channel matched system that was free of complaints.   It didn't turn out that way...

  Just yesterday I believed I had an EQ applied when the master was off. It took me fifteen minutes to realise. We haven't applied the standard measurements yet. They may well be inadequate.   Quote: There has been no argument made previously about testing the behaviour of different...