Sennheiser PC37X randomly goes bad after disconnecting the cable ?
Greetings, Yesterday I was using my headset like normal with my macbook, just listening to music and on a call with people like usual, and the headset was perfectly fine. The stock wire that came with the headset is extremely long and yesterday it annoyed me very much that it kept getting tangled with itself, so I decided to see if the cable is replaceable. I pulled out the cable from the headset and saw the adapter, and looked online for a replacement. Upon plugging it back in, the audio sounded extremely muffled and washed out. Im not sure what I did wrong to make it mess up like that as I've always taken good care of it, ive had it for about 2 years and its always just been chilling on my desk, but anywho I thought the cable just went bad and ordered a replacement. The replacement came, and the issue is still persistant, so I am not sure what the issue is I've tried multiple different headsets and the issue is not with the port, and I also tried it with my windows laptop and...
Apr 23, 2024
Meanwhile I orderd the chinese dac+amp dac-x6.
Will I hear a upgrade with the sdac and o2???
I have the HD650.
i guess it will have improvement but a little
better go with topping a30 and d30 combo stack
OMG!
I only need it at around 11-12 o'clock at low gain (1x) to get it plenty loud.
I already explained this to someone else today, I don't exactly want to explain it again - sorry! If you're interested head on to: https://www.massdrop.com/buy/massdrop-o2-sdac-dac-amp/talk/1821317
It will talk about the maths and explain why the O2 still struggle with a HD600, 650 and 800.
The HD650, at 300 Ohm & 103 dB/mW, only needs around 16mW (2.2V, 7.3mA) to reach 115 dB SPL and 50mW (3.9V, 13mA) to reach 120 dB SPL. These are all plenty within the O2's capabilities as it can do up to 7V without clipping and up to 88mW at 600 Ohm which is twice the impedance.
HD800 (which I also own) is even easier to drive having the same impedance rating yet slightly better efficiency. These thus need less power.
But maybe you missed that portion of high school physics? :)
The HD650 are not 103dB/mW, they are 103dB/V. They need 63mW to hit reference level at 1khz, they need 105mW to hit reference level at peak impedance in the midbass. Look carefully at the O2 specs, this is close to peak output. Yes, you can hit reference level on the O2, but you also get peak distortion.
Did you even read my calculations? The HD800 (which I also own) are even worse, they hit 640 ohms peak. They are not more efficient, they are 102dB/V and you need 66mW to reach the same volumes at 1khz.
I might add that the designer of the O2 himself used it as one of his reference headphones whilst designing the O2 and stated that the HD650 is well within the capabilities of the O2 and that they get near the threshold of pain already at 2.5Vrms.
I can back this up since upping the volume dial to the max at 1X gain (2.1Vrms) is already too loud by my standards.
Regardless, considering I get a comfortable loudness level with my O2 with the volume dial barely even halfway (1X gain, DAC output being 2.1V) I think it should be plenty fine enough to power them.
Also yes, Nwavguy, the same guy who said this: "because the HD650 is near the threshold of pain at about 2.5 Vrms" and " The HD650 needs about 2.5 Vrms for 110 dB peak SPL." (in the comments here: http://nwavguy.blogspot.se/2011/02/headphone-amp-impedance.html?showComment=1316651902158#c2530932942666858374)
This is more than enough if you ask me. And I recall he also stated at one point that the HD650 were amongst his favorite pair of headphones.
I joined the HD 6XX and now this one. It's a no brainer.
I don't give a shit about all the mathematics and "won't have enough power" bullshit, what matters is how they sound to you in the end. Audiophile snobs should calm down and stop trying to tell people they must spend 500€ on an AMP or they are buying shit.