milkpowder

^^ I'll fully assimilate what's been said tomorrow morning. Another slightly off-topic tangent: Malo, you mentioned current-based amps. Naim Audio is the first company that comes to mind (my mind anyway, since I spent a decent amount of time listening to them). Their power ratings are low and they boast high current design. Low wattage + high current = low voltage. In that case, how do the speaker diaphragms move? How is current related to displacement of the speaker cone? I've always been taught that it's the voltage (amplitude) that makes the cones move because the magnitude of the induced EMF is proportional to the rate of change of the magnetic flux linkage (to be understood inversely, in the case, since it's the change in EMF producing a change in magnetic flux linkage), a phrase I was made to remember when I was doing physics in high school This is great physics revision:D

Thanks MaloS. Good info. I don't have too many issues with the way amplifiers deal with voltage and how they react to driving different impedance loads. What I am still not certain about is how current changes depending on load. High AC voltages will blow a driver right out of the enclosure and high currents will melt voice coils. Is there anything wrong with this statement: an increase in voltage leads to higher current flow. Hence increasing volume (voltage), leads to higher current flow? Or should I say increase voltage => increase current and both contribute to increase in volume. The basic equations I'm looking at are I=V/Zload, P=VI, and the P=Vo^2/Zload. Are there others to consider? The answer is probably yes Anyhow, you guys are saying that it is definitely safe to run something like a K1000 (Zload: 120ohm) or electrostatic adapter box (Zload: 8ohms? ) from a 10 gazillion Watt amplifier as long as the preamp is capable of finely controlling the volume to reasonable listening levels? One more stupid question before I retire: Why don't manufactures only make passive pre-amps and let the power amps do all the voltage/current gain? I understand that some sources give off minuscule voltages eg microphones and phono, so those may benefit from a bit of voltage gain so that you can actually accurately attenuate them.

Thanks for the explanation. Sorry for leading the thread offtopic.

Crawls away in shame :'( Does the current drawn change depending on volume? I thought it was only the voltage that changes, is it not? If so, then won't the high current melt the voice coils say if I plugged a K1000 into a 350W amp even at low volumes? Argh... I'm confused. School taught me nothing about this sort of stuff. Feel free to PM me.

I wouldn't touch it. The seller's feedback is nothing out of the ordinary on a superficial level, but like you said, edwood, the private bidding does smell fishy. Even if he accepts Paypal, they will only give you $200 in compensation. That will hardly cover the cost of a replacement headband, for example.

I can remember a pair on eBay selling for around 600-700. It wasn't mint though: the cable was very twisted. IIRC, Nikongod from Head-Fi bought them.

10W?! At what impedance? Did Stax put a warning in the user manual? I imagine most people have amps with over 10W of power. Last time I checked, not everyone had 300B SETs

Maybe they are collectable, but apart from that, why would you want a pair? Do they actually sound good?

Class XD always makes me crack up.

Nice to see you here Ronnie. A black AE-2, iirc

I'll give EQ (foobar) another try. Last time I tried, non-EQ seemed to sound a bit cleaner. (EDIT: 2db @ 55hz, 1db @ 77hz, 1db @ 110hz. No distortion so far) Can the SRD-7 take around 350W/ch/8ohms of power? So the AMT/Aleph M isn't as good as you hoped it would be, but still a big improvement? It "sounds" (excuse the pun) like the AMT doesn't like it hard. No Jean-Michel Jarre then

you know, he really likes your signature... \ Oh yes I do Yeah whatever. I'm going mad.

When I sit down to listen to music, it is 90% classical. I don't usually listen to anything else. Portable listening is different. That's almost 100% rock and alt. For classical, the HE60 is superb. The bass is definitely sufficient. For the other 10%, I may listen to something like Nirvana, Coldplay, Chili Peppers, Dire Straits, Mike Oldfield, Norah Jones, etc and the quickness of the bass sometimes surprises me. There is no muddiness at all.

The O2 really does bring a smile to your face whatever the music. It's sound signature is so easy on the ears. Apparently, the HE60's bass really improves with better amplification eg BH, KGSS, Woo GES. My wallet ain't big enough to find out How much heavier does the HE90 feel vs the HE60? I can't imagine the HE60 being terribly comfortable for people with large heads. They have the Senn clamp, but not quite as much as the HD6x0

Haha!

Interesting that you prefer the HE60 over HE90? They must be good out of the BH. From my limited time with the SR-007, I think I'd also prefer the SR-007 over the HE60, but only by a hairs width. It's a completely different listening experience altogether.

Sure, AKG didn't create some all-conquering beast of a headphone, but that wasn't the aim. They'd just discontinued the K1000 and wanted something more practical which would sell more.

I can't believe I'm quoting myself. Anyway, I think I can remember the denser foam ring. Nvmd about my question.

Why didn't some one tell me I could use a heater too

I tend to agree with both of you. The sound becomes hyperdetailed, if not a bit harsh. I listen to the HD650 defoamed, but defoaming the K701 takes it, IMO almost to Grado-like territory. Jon L, what S/N is your K701? My pair didn't have two layers of foam.

Suhweet! Any time-scale on the design being finalised or is it already finished? Will Justin be making any of them? I'm so behind with everything. The other forum which must-not-be-named has been down for long enough. I'm feeling right at home here

UK'ers are just too used to overpaying for goods they loose their sanity... I just don't understand why people go crazy over vintage, probably poor-sounding non-dynamic headphones over here. I sold a pair of SR-404 for more than it would cost to buy a brand new one. Go figure Oh well, all the better for those of us who might be selling gear on eBay

What's KGST :'(