Torpedo

Same here, it's free for any risk population. For working at a hospital I can have the vaccine, but the only year I got it, I passed the worst flu in my life, so I haven't dared to repeat At this moment passing a strong cold

Anna Troy - Ain't no man (2006)

Yep, I posted those graphs at HF too some time ago. We didn't have an adapter, so we needed to swap the wires at the headphone's end. We put much care to place the phones in the very same position, if you look at the curves, they are very well matched being the only significant difference the 1-2KHz dip in SE mode, so we assumed we didn't a bad job. Otherwise there had been other greater differences at other frequencies too. Your Behringer mic is widely used for this type of measurements, however its quality isn't comparable to the Earthworks' M30 my friend uses for his field measurements. BTW it's an omni, not a cardioid as I stated previously. I think the Behringer would take less accurate distortion measurements for its own distortion products being added to the signal the computer analyzes. Grawk, measuring using a musical signal would be too complex to be practical and meaningful, that's the main problem with it. If you apply averaging and statistics, you spoil the "real time" part of the signal, and if you try to measure in real time, the signal is too complex to let you know for sure if you're comparing the original signal to the measured one or you're also measuring spurious signals added by the environment, the own cans or measuring devices... However I agree that these measurements don't say everything we can hear, that's sure. It isn't a bad starting point though. In any case I rather trust my ears than a measurements set. I mean that I can hear the HD600 don't sound the same in SE than balanced and were measurements all equal, I'd still trust my ears since they'd be probably finding something that we still haven't learned to measure.

He also measured impulse response and energy storage-liberation, but those measurements were virtually identical in both modes. The program he uses is not RTA, so it takes some time to process the data, but the whole procedure seems quite "kosher". As a matter of fact I rely more his measurements than Headroom's, not only for the quality of the microphone, which costs about 3000 euros for its extreme frequency accuracy and balance, but also for not using unknown ponderation dBs, but just the ole good SPL ones. Let's see if your findings on harmonic distortion match ours. Distortion products are frequently overlooked, but they can explain a few things we can hear, just have a look at this graph from the K701: That 2nd harmonic peak at 400-600Hz...

I've just received a package from Ken. I'm hesitant to open it, I'm full of shame since I haven't even shipped his yet. I'm waiting for his disc to arrive, but looks like it will get way longer than I expected Maybe I'll need to change my plans. Thanks mate

Very interesting Dreadhead. To support your findings, I paste here the measurements we got using a calibrated Earthworks cardioid placed into a dummy ear, driving the signal into an Apogee Duet and using a Macbook Pro with some software which I don't know. It's a friend's system. The signal was fed into a Rudistor RPX-100 (the only balanced amp I had at that moment) driving the HD600 in Single-ended (black trace) and in balanced (clear brown trace). The main difference is a bit more than 1dB in the 1200-2500 Hz area, and also in the harmonic distortion levels (second harmonic is the top pair of traces at 40-50Hz, third harmonic is the lower pair) specially the second harmonic in the whole treble, which seems lower using balanced mode.

I'm starting with it now, my wife is passing it for three days. Yours sounds worse. Take care and get better soon.

Charlie Mingus - Blues & Roots (1959)

Hi Red, welcome to this mad case

Mmm in a strict sense a vibrator isn't the same as a dildo

Oh Deepak, I'm sorry for you. Good luck, I wish you get your power back soon. I wouldn't stand being at the hospital that long

I have no basement, but there's a quite big park in front of my building. Send him to me I know well how to cut a corp in pieces, and I have the tools. The trees, flowers and grass in the park will love the extra manure.

Sure. I'm glad I've got a couple of friends with the gear and know how. From time to time I "cheat" them to measure some phones. I've been trying to get the one having the better system to measure the PS-1, R10, L3000, MD5000 and CD3000, but he's very busy so we can't find the right moment. However none of them has critical sealing demands, so they're not as difficult to measure as the O2 would be. Anyway, I own none of both, so no worries

I agree, however, measurements even very elemental ones but using proper microphone and a decent dummy ear, if made under the very same conditions, would give a hint about the differences among mk1 and mk2 in the midbass and other areas. It's not that much knowing the exact response on each phone, as knowing where the differences take place and their relative importance to the rest of the frequency spectrum response.

I'd like to see some well measured frequency response graphs, using a competent amp, comparing the O2 mkI to the mkII. Therefore we'd know which of them is more accurate and how our brains "understand" that.

Fantastic Nate, I was concerned you were going to freeze shortly Take care.

I find it interesting nonetheless. If they managed to produce headphones with the flat response of the HD600 or better, and with the lower distortion levels of the HD650, with improved impulse response and eventually more sensitive, they could be monster cans. Moreover, add to that package that they were closed or in the least provided more isolation than the current open design HD6xx, selling at some price point below $600, and I'd be scared if I were AKG, Ultrasone, Grado and the other competitors in the dynamic phones market.

Fabulous Pete, congratulations for your purchase. I hope you like it, it's a very good amp for the price, let's know how you like it.

Thanks for the update Malos. I wish you were lucky with your finals

^ LOL, you're very bad

I'll be getting them on its due time when the loaner program goes on, but I haven't heard of it, so not sure it's working. As things are going by, I'm afraid they'll take a couple of months or three to get to me

Welcome mate . Ask Tony, he's very happy with the recabled Etys and he'll be able to compare them to the W3 shortly.

Eli "paperboy" Reed - Roll with you [2008] Definitely this guy has energy

Whatever

A high price doesn't make a product any better, and all you know it well. I'm also not saying that the Denon used alone driving speakers would suffer some hum, it's probably dead silent. Those receivers show hum issues when used as sources or preamps. That's my experience and other people's too, but this doesn't mean Tkam's unit "has to" be huming necessarily and he should accept it as is. Specially after knowing the device didn't hum previously. However I'm prone to believe that he hardly will get rid of the hum when using the receiver as source or preamp. In any case I wish him the best of lucks