mypasswordis

Or this?

Or this?

Joy Division - Unknown Pleasures

And don't forget to let there be more light by setting the controls for the heart of the sun.

Happy birthday, AKG - North American division!

. Will this suffice?

I'm thinking about doing a whole long session consisting of some 9th symphonies (Beethoven 9, Mahler 9, Dvorak 9, Bruckner 9, Shostakovich 9, Schubert 9) soon. Don't know when though, it's gonna take one longass time. Curse of the ninth - Wikipedia, the free encyclopedia

It should make a difference. Assuming an SS amplifier with 0.2 ohm zo, damping factor of 600/0.2 = 3000. Damping factor of 600/120.2 = 5. Yes but the impedance curve seems to be outside of the Headroom graph.

Heh, I use the pigtail and plug it into the speaker outs so I avoid the series resistor off the the 1/4" headphone jack. Here's the article on current source amps: http://www.passdiy.com/pdf/cs-amps-speakers.pdf The reason it's a "current source" amplifier is it's really just a normal (high-powered) voltage source amplifier with a 47 ohm resistor in series at the output, which is the Thevenin equivalent of a real current source with a resistor in parallel. The reason it works is because speakers have impedances that are usually much smaller than 47 ohms so it seems like a current source, though it obviously won't work on headphones. Though many people have said they liked the K1000 with the F1, which is a current source (transconductance) amp. Well, for speakers anyway.

http://www.youtube.com/watch?v=Nbxy_-Rg41o

Yup, that's what I'm thinking too. I've never heard of Lambda drivers dying on their own. I hadn't used my SR-Lambda for half a year and it took a little bit of time for the stators to charge fully, for some reason, and it was perfectly fine after that. I'd say you need no longer than a full day or two of plugging into bias, or in my case, playing music a couple hours at a time for a few days. Anyway, I doubt your Lambda Pro is borked.

I think he's just chillin' like a villain. He seemed like he'd be able to make it to the VA meet on the 20th, when I asked him.

Me, but replace T1 with K1000 and 80s Aiwa with 70s Yamaha. My understanding is the lower the output impedance, the less effect there is on output voltage from the variation in impedance vs. frequency of the headphones. But there is such a thing as overdamping, and so there is an optimum damping factor range for each headphone. I bring up again the Pass discovery of the "current source" amplifier for efficient single driver speakers. Beyers in the past have been loose in the bass due to the bass reflex design, making producing the bass frequencies much more efficient so I don't see further undamping them helping the sound any.

Hey Tyll, could you redo the T1 impedance plot with a bigger scale? That slight dip to under 600 ohms at 3-4kHz is the only thing there currently.

The headphone is essentially a capacitor so it holds charge and there are also capacitors in the bias circuit. Once it gets going, an intermittent connection won't really be noticeable as long as it isn't really intermittent. Usually the surefire way to know if a 'stat driver is about to die is permanent channel imbalance (it never is balanced no matter how long you wait for the charge to build on the stators). How long have you had the Lambda Pro for and have you been using it a lot recently?

This.

Or the DIYers, as it may be. I redamp pretty much every headphone that comes my way. The point was that you don't want everything to be done on the mechanical side since it has plenty of its own issues to deal with (driver and enclosure resonance, diaphragm thickness, comb filter effects, ringing, etc). I am doubtful higher output impedance amplifiers will help the sound but I definitely want to hear Beyers with amplifiers with proper IEC output impedance, since you hold them in such high esteem. I am not in the no global feedback OTL camp.

Can you sing? We should do Head-Case: The Musical. If you can't, how about a Head-Case skit? Or drama. Or a combination. Maybe a mockumentary?

Great write-up Tyll. Indeed if the damping factor is less than 1, the drivers are damping the amplifiers. Yup, and what you want is the easiest possible to drive load when it comes to headphones. It's part of why orthodynamics are so fantastic. Almost completely linear impedance across the frequency range and is very near a pure resistive load, which means the amplifier should have an easy time with them given enough power. The T1 already has more distortion than normal headphones due to its extremely strong magnets. Edit: WAT.

Yeah, I'd also be scared shitless if I had to put the Fuglies on. Not that it would stop me. Any of you brave enough to put them on care to describe the sound more in detail? I have read all sorts of things, iirc from massive BAAAASSS to having treble impact to sounding like a better version of a K1000, so basically everything seems to contradict everything else and it seems like there are multiple versions of them.

I'd use that pic way too often for my/its own good. It's good to know you have standards. I have a friend who jokes about 8 months old to 80yo being his range.