What type of adapter?Thank you! Really looking forward to it. Your HE90 impressions certainly have contributed.
Thank you! And yea I've always kept an eye without saying much. Just figured it would never happen lol. And catching them headphones alone w/an adapter was best case scenario for me, stars really aligned
Maybe its time to edit the title of the thread? Kind of makes no sense.
"Sennheiser the God Orpheus Vs the peasants"
"The God of headphones vs all"
"Sennheiser HE90 vs modern trash" <--- sorry cant help it
....
But we shall see. Looking forward to giving everything a fair shake and seeing how the x9000 and SGL Sr. particularly fair.
How does it change the bias voltage to 500 volts that the HE90 require vs the Stax output of 580volts?Haha, I know you can't help it.
HE90 to Stax, so that it can be used with traditional stat amps other than Sennheiser's. I really wish I knew I'd run into a pair, I would've had the T2 built with the HE90 jack directly. Maybe something to inquire about in the future.
It has been discussed quite a bit. You do not want to bias them to 580 volts. They are designed, unfortunately to 500 volts and will not sound right at 580 volts and can possibly be damaged by it. This is why Headamp designed an amp mainly for the HE90 and also the RSA A-10 amp has a socket for them, with a 500 volt bias and a Stax output for 580 volts. You need a transformer output to the right voltage, then regulated. There is the voltage and almost no current used in the bias.
I have spoken to two electrostatic amp manufactures about this at length. While I really wanted to be able to use the HE90 at the Stax bias, they both strongly recommend against it as well as everything I have read. But I know how I will treat my HE90 and if someone else wants to use the Stax bias, that is of course, totally up to them. Understanding what the bias does and how it works with the Sennheiser design is what is important and the materials involved.@number1sixerfan talk to Van about any voltage issues or concerns with the HE90. I know him personally, he is a guru in this space. He knows more about all the legends plus some than 99% people here. I hope you personally pick it up at his house. And if you do, do not hesitate to ask him kindly to listen to his Omega and R10 and his headphones. This is your chance to hear everything in one shot
@doyouknowSBmean
Your correct. Yes, I agree with you.
Yes, the HEV90 needs to be reworked and by now, would need to be recapped most likely but better caps. I don't understand why they did what they did. Underpowered and they hobbled the HE90. Some say the HE90 lack some bass, and if heard from the HEV90, I would agree. But from a well done amp, very normal and decent bass inline with the rest of the frequency range. With a good amp the HE90 and the R10 do a great job. Love the sound of the R10, very distinct.
The resistor is not the answer. And it was put forth that maybe a 10 meg ohm would work better but just like a resistor divider, does not hold the voltage correctly. I would not use this method.Absolutely appreciate @jamato8 bringing it up. I was going to check in with Kerry first either way, but I really appreciate all of the feedback from everyone.
But I forgot that Spritzer built the adapter, so I figured he would've included the additional resistor to make it safe for use with other amps. Just reached out to the seller and he confirmed that he indeed did include a 5M ballast resistor in the plug. Please let me know if anyone still has any questions here, I truly appreciate it.
At the same time, heard back from Kerry and will likely have my T2 updated at some point to naturally support the HE90. But I'll commit to this after I've already spent some time with them.
