Originally Posted by gug42
: Thank you for thoses reports ! Wich headphones did you have use ?
For 32 to 70 Ohms headphones, between LL1664 (ratio 19) and LL2765 (ratio 12) wich one could suit the best
Thank you evry one
I've used a 250 ohms Beyerdynamics 880pro, which sounded nice on both 12:1 and 6:1 of the LL2765.
In my opinion, you should use the LL2765 which is a dedicated headphone output tranny. You'll have more power output compared to the 1664 and you'll need it when using the HE-500. Also for the same power output you'll need less gain using the LL2765.
I've seen on 6moons that the recommendation for the HE-500 is a 1 W output amplifier. So a 300B or 50 would be more appropriate for your headphones.
4p1l can also be a choice but expect a bit of microphonic sensitivity. Still think the 45 is the best compromise. And there are many options of new production, expensive though.