I chose gains of 1x & 3x by the way. This is enough to drive all my headphones very well.
Edited by Zorrofox - 6/25/14 at 1:22pm
Hi everyone, I just ordered the Just Mobile Head Phone stand for my HD650
And after reading a review in amazon someone said they won't fit the HD650 because the stand is too short, does any of you have experience with that ?
The stand length is 25cm its really on the edge when considering the headphone with the cable connectors..
Should I cancel my order?
Can someone explain (or link) why output transformer-less amplifiers are particularly well-suited for HD 650 (and other headphones in its impedance range)? Clearly this is accepted wisdom, but I'm having trouble finding an explanation. What makes it so favorable?
Were I to guess at answering my question, I see that the Valhalla 2 power output peaks into 300 Ω (higher than both 50 Ω and 600 Ω specs), whereas other designs scale down in power with escalating headphone impedance (power into 600 Ω lower than 300 Ω, 300 Ω lower than 50 Ω, etc.). An amplifier that delivers its peak power into your desired impedance load implies an ideal match of sorts.
The V2 delivers 800 mW into 300 Ω. Checking just a few common amplifier specifications, I found only Schiit's own Mjolnir with more power at that load, and only another 50 mW at that. What does all that power get you? Clearly it'll be plenty loud, but 40x less power would accomplish that for HD 650. Does it also optimize signal/noise ratio (even better than the quite acceptable low-gain spec Schiit gives)? Does it free up the design budget for other goodies you wouldn't otherwise get when trying to optimize for other impedance loads (or accommodate a range or loads)?
I have a perfectly good Asgard 2 that drives the HD 650 (and my powered desktop speakers) quite nicely. But since I only use HD 650 headphone at the desktop, I don't really need the A2's range of capability, so I'm intrigued by getting an amplifier optimized for the HD 650. But other than more than 2x the power, the rest of the specs differences, as they relate to HD 650, seem pretty nuanced to me. V2 has 5x the distortion, but IMD tops out at 0.05%, so doesn't seem like an issue.
Which brings up a somewhat more sensitive point, that even with different distortion character between tubes and solid state, why would I expect much audible difference with such low distortion overall? The funny thing is, seeking out a particular sonic signature or harmony between the amp and headphone isn't really the priority for me (nor is implying that all amps with the same specs sound the same). If I just wanted to "try tubes," I'd order a Vali. But I would like to understand why the V2 and other OTL designs are particularly well-suited for HD 650 and why.
That's an interesting question, I've been asking myself:
And to answer your main question - I would stay on Asgard 2, there wouldn't be much (if any) sonic difference and its power output is more than adequate for HD650.
I recently got a new DAC, and I must say, my current setup finally brings the best out of my HD650's. At first I wasn't overly impressed with the headphones, but boy did these grow on me! and I have to say, the sound I have coming out of my current setup with the HD650s is the best I ever had it. I am running music from my computer via USB to a North Star Design Essensio DAC to a Meier Audio Corda Concerto amp and to the HD650s. I had the HD650s for months now and only now after replacing the DAC in my setup the results are just remarkable...! once day I'll want to get an Audeze for this setup, but for now the HD650s are just sparkling, more dynamic and detailed than I've ever heard. Truly a winning combo!!
Hey, where is the cheapest you can buy these? Anywhere cheaper than the Sennheiser Outlet Store ($424)? I always check Amazon Warehouse, they are at $411 right now. My paycheck comes in a week and I'm constantly trying to find the best deal possible.
I won't use the FS forum on here, but I will buy open-box, refurb.
Sennheiser has tightened their grip on how their dealers can price these phones, so unfortunately the days of the great HD650 deals might be over. I used to recomend RazorDog for these, but I think he's no longer a Senn dealer. Most likely because of the latest crack downs...
You can find them new in accessory jack for 400$ ..
Though you should read up about the warranty in here:
According to camelcamelcamel.com, the price on Amazon has not dipped below $400 in two years. But that does not include gift card promotions. I snagged my HD 650 with one of those, might have been $400 price - $50 gift card, maybe a little lower price, but pretty sure the card was $50. I think I reported the transaction on this thread. It was a couple of years ago, early December I think. Might be worth keeping an eye out for.