On electrostatic amps, what to look for by specs? Is it voltage swing or gain that determines how much amplification you get. I see some list greater gain compared to voltage swing.

Just curious.

I have a ton of Ei tubes, and for the most part I like them. I have some Tesla labeled tubes (plus the JJ versions). Any way I have yet to hear a Tungsram or RFT tubes. So what are the opinions on the various former communist vacuum tubes?

So while l looking on eBay, I stumbled across these listed as electrostatic headphones. Ni info from the seller as to bias and any other specs. I looked at the picture, and at the yoke hinge , it has ATH-M50x ! So it turns out it is a rebadged Audio Technica dynmaic headphone set.

I purchased a SRM-1/MK2 that has one socket modded for pro bias. After nit is on for 5-10 minutes I get a hum in the left channel, The pro bias side is louder than the normal bias. It looks to me that all the electrolytic caps have been updated. So any ideas as to what may be causing the...

Saw these on eBay any one know anything about them? https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F401819079423

If you decide to accept this challenge you need to: Make it affordable Able to hook up to most power amps, like your 3 power amps Able to be used with most electrostatic such as Stax, Koss, Sennhieser, and others Multiple bias selections for both the Stax, Koss, etc Perhaps...

I have the latest ESP-950 headphones and I do enjoy them a lot. I have had them since about 1993 when they first came out. What I would like to find out is about the previous versions. I have read about and seen ESP-6, ESP-7,ESP-9 (and B), and ESP-10 headphone systems. I know they all have...

Eq used to be a nasty word for audiophiles back in the day. My first stereo I bought back in the mid 70's, I added a passive Radio Shack on, and from memory, I thought it sucked, caused all kinds of phase shifts. As of late, the Schiit Loki Mini seems to be a big sensation in the Headphone...

Ok so I have been tube rolling for over 25 years. But now that I have a Schiit Vali 2, I have learned a lot more. First, with the exception of Sino and Russian tubes, Phillips may have had their fingers in just about all tube brands at one time or another. Second, trying to ID 6DJ8 and 6922...

Ok so there hundreds of different tubes out there. Some sound great others, not so much. Mullard and Telefunken are getting rare and pricey. What signal, power and rectifier tubes can you say are good with a good price? Some new tubes such as Gold Lion are said to be very good, as are the...

Just curious if such a beast exist. A headphone with multiple tap's of a transformer would indeed be a nice item. Tap's such as 16, 32, 64, 150, 300 and 600 ohm from a transformer coupled amp could be interesting. Speaker power tube (and McIntosh SS) amps have 4, 8 and 16 ohm tap's so why not...

I am using my Koss PortaPro's right now.

I am guessing there had to be some produced i the 80's and 90's. Of the portable cd player's I owned, I seem to recall they were all single bit delta sigma players.

So you have a DAC with headphone output, when do you decide I need an amp? Of course if the volume is not enough you need one, but what else do you use to decide?

I received these yesterday and have been letting them burn in a bit. So far the sound with the bass tuning ports, they sound good on my ipod classic 160. As of yet, I have not tried the normal tuning ports, but I will keep everyone informed of what I found.

Hello I have a USB Cyberdrive Feather Clarity dac. It is a nice sounding dac, but the connection part of the USB seems to be failing. So what I would like to know, is if I disassemble the casing and solder a USB cable leads to the data input, can I use an external USB power source that...

has anyone tried one of these yet in their player? I am currently using 200 gb cards in my Xduoo X10 and Fiio X3 II The Xduoo having 2 slots would mean 800 gb of files, which would be almost every high resolution file I have ripped from vinyl would fit on it.

It has no markings other than l and r on each respective ear cup and a silver metal tag on the right ear cup that's is: MID#0790813. The same tag is on the left, but nothing in it. It has a nice tight mesh headband cover, and what feels like a cloth cable. No gold tips and no microphone. It...

I have Koss ESP-950 heaphones, and I have often wondered how it would sound with another amp/energizer. Has any one tried one of these yet?

Can any one give me a guess as to when these were made? The cord has some issues, but if I place it over the yoke, they play fine. So wow, what can I say, vintage phones, but not my oldest, as my Stax mark III are most likely a little bit older. They are rated at 50 ohms, per the...

With the exception of the ESP-950, does koss only have 2 types of drivers? The one in the PortaPro and the one in the KSC75. And those may be the same drivers except for the titanium coating on the one. I suspect all the full size cans have one of these 2 drivers in them. Am I wrong for...

Just curious as to how people keep track of the cards (label storage etc)? I currently have 2 DAP's that take cards, the Fiio X3 II with 1 slot and the Xduoo X10 with 2 slots. I am debating if I should but more than the 3 cards I have for them. While I have pulled cards from one and...

Well I know the Audeze iSine iem's have not out for very long, but begs to b asked, how do SRS-002 compare with iSine? They both are large by iem standards. What little I have read on the iSine seems to point that the Audeze are better than the Stax. The Stax comes with a small battery...

It is that time where I am having a GAS attack. I have had my Koss PortaPro headphones for over 10 years, and I plan on keeping them for a long time still. I had a pair of Grado SR60 headphones years ago, but they got destroyed while they where in storage, mouse attack o. The cables. I always...