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[GUIDE] Sonic Differences Between DT770-DT990 Models & More - Page 73

post #1081 of 1655
Quote:
Originally Posted by PurpleAngel View Post

The first listing is for the DT880 600-Ohm, the second and third listing are for the 250-Ohm versions.


Yes, I know, the problem is that I couldn't find a DT880 600 ohms in a physical store in Paris, this is the only store I know right now that is selling the DT880, and only the 250 version. I almost grabed it when it was 190 euros, but they didn't have in stock, and I didn't want go get the exposition piece.

post #1082 of 1655
Glad to see that my impressions of the Premium DT990 32/250/600 ohm are very close to what Zombie thought of them. I compared them directly, and not against the 880s as Zombie did. Also didn't look at his impressions until after I wrote mine.

The 32ohm does indeed sound a lot like the 600ohm with a slightly smaller soundstage and a little less refinement. The problem with the 32ohm is that they need a lot of power. With minimal amping to no amping, they sound sloppy and not as good as the others. With good amping, they sound nearly as good as the other two 990s. Enough to put them within the same 5%.

The 250ohm is indeed darker sounding with more bass. I didn't find them to be any harsher than the other two, due to the bigger bass presence taking the edge off a bit, IMHO. These are the most different sounding of the three, but still very much identical. It trades off a little bit of the mids for more bass. I actually prefer this one the most right now, as it's the most energetic.

The 600ohm is definitely the most balanced and refined.

I found both the 250/600ohm to have similar soundstage and imaging.

I'll be getting the ODAC in a few days and the Audio-GD SA-31 soon after (hopefully this week, though I doubt it). I just sent back the 32ohm, but still have the 250/600ohm. Hope to do even more A/B-ing.
Edited by Mad Lust Envy - 10/21/12 at 10:00pm
post #1083 of 1655
Quote:
Originally Posted by Mad Lust Envy View Post

The 32ohm does indeed sound a lot like the 600ohm with a slightly smaller soundstage and a little less refinement. The problem with the 32ohm is that they need a lot of power. With minimal amping to no amping, they sound sloppy and not as good as the others. With good amping, they sound nearly as good as the other two 990s. Enough to put them within the same 5%.
 

 

Waddaya mean the 32 Ohms need a lot of power?

 

Please expand. I ain't following you.

I have 600 Ohm DT880, I find that I have to crank the voluem compared to other 'phones, but this only meand they need more voltage than my other phones.................

signed,

just curious.

post #1084 of 1655
Quote:
Originally Posted by Chris J View Post

 

Waddaya mean the 32 Ohms need a lot of power?

 

Please expand. I ain't following you.

I have 600 Ohm DT880, I find that I have to crank the voluem compared to other 'phones, but this only meand they need more voltage than my other phones.................

signed,

just curious.


Sort of general rule of thumb - please correct me if I'm wrong.  High impedance phones need more voltage, but low impedance phones generally need more current.

post #1085 of 1655
Quote:
Originally Posted by DTrewwye View Post


Sort of general rule of thumb - please correct me if I'm wrong.  High impedance phones need more voltage, but low impedance phones generally need more current.

Precisely! You got it!

 

High impedance 'phones can be rather deceptive, they need more voltage so you have to turn the volume up more, but you are pulling very little current out of the headphone amp.

A lot of folks think, "if I'm turning the volume up then the 'phones must need more power".  It really means they need more voltage and you don't get a good intuitive grasp as to how much current the headphones pull.

post #1086 of 1655

Only way to do that is with equipment that measures output IIRC
 

post #1087 of 1655
Quote:
Originally Posted by Chris J View Post

Precisely! You got it!

 

High impedance 'phones can be rather deceptive, they need more voltage so you have to turn the volume up more, but you are pulling very little current out of the headphone amp.

A lot of folks think, "if I'm turning the volume up then the 'phones must need more power".  It really means they need more voltage and you don't get a good intuitive grasp as to how much current the headphones pull.

 

So I'm assuming voltage corresponds to how many mW the amp is pushing into a 600 ohm load? If so... is there a corresponding spec on amps that will tell you how much current its providing?

post #1088 of 1655
Just putting the 32ohm next to the 250ohm, the 250ohm needs more volume out of the amp, but sounding pretty clean with a portable amp. The 32ohm require a bit less, but sounding sloppy. Once I paired them both up to the desktop amp, they were near identical, and the 32ohm improved a LOT. That is the reason why Zombie and a few others mention how the 32ohm needs quite a bit of power to be driven properly. Having heard this with a lot of A/B-ing, it doesn't make sense to get the 32ohm unless you're have very weak sources and no amps where they can get loud enough. Still, that's not helping the 32ohm go anywhere near their potential at all.
post #1089 of 1655
Quote:
Originally Posted by devhen View Post

 

So I'm assuming voltage corresponds to how many mW the amp is pushing into a 600 ohm load? If so... is there a corresponding spec on amps that will tell you how much current its providing?

 

You have to calculate..................frown.gif.........who wants to do that!  LOL!

 

Power and Volatge and Current and Impedance are all interelated.

 

Power (Watts) =  Voltage X Current

 

and

 

Power =  (voltage) squared/Impedance        i.e.  P = Volts X Volts / Impedance

 

and

 

Power = (Current) squared X Impedance        i.e.   Power  = Current X Current X Impedance.

 

You could say that a Headphone amp runs out of power because it either runs out of voltage or runs out of current.

post #1090 of 1655
Quote:
Originally Posted by Mad Lust Envy View Post

Just putting the 32ohm next to the 250ohm, the 250ohm needs more volume out of the amp, but sounding pretty clean with a portable amp. The 32ohm require a bit less, but sounding sloppy. Once I paired them both up to the desktop amp, they were near identical, and the 32ohm improved a LOT. That is the reason why Zombie and a few others mention how the 32ohm needs quite a bit of power to be driven properly. Having heard this with a lot of A/B-ing, it doesn't make sense to get the 32ohm unless you're have very weak sources and no amps where they can get loud enough. Still, that's not helping the 32ohm go anywhere near their potential at all.

 

Ah-ha!

Sounds like the little portable amp can't output enough current for the 32 Ohm version but the portable amp can output enough voltage to drive the 250 Ohm headphone!


Edited by Chris J - 10/25/12 at 9:19am
post #1091 of 1655
Quote:
Originally Posted by Chris J View Post

 

Ah-ha!

Sounds like the little portable amp can't output enough current for the 32 Ohm version but the portable amp can output enough voltage to drive the 250 Ohm headphone!


Indeed, my crummy little Fiio E6 can drive my Dt 880s decently out of my Tv where as with DAPS I need my cMoy

 

Still nice summazation of the ohm differeances, Less Ohms needs more Current, more Ohms needs more Voltage... will keep that in mind :3

 

I do like the Dt 880s sound stage, how open is the Dt 990 250 Pro compared to the dt 880 Pro 250's?

post #1092 of 1655
Quote:
Originally Posted by Bloodflowerz View Post

Could you also comment on the differences you hear between the T70 and DT770?

The T70s are a step above the DT770s sound quality wise.

post #1093 of 1655

I'm thinking of getting a pair of Beyers but can someone please help me decide?

 

Which Beyer has the most musical sound with a decent soundstage that would be best for alternative rock and be can be driven by an Asus Xonar DG. Close to $170?. Also would prefer open back.


Edited by Supertoaster - 10/29/12 at 12:04am
post #1094 of 1655
Quote:
Originally Posted by Supertoaster View Post

I'm thinking of getting a pair of Beyers but can someone please help me decide?

 

Which Beyer has the most musical sound with a decent sound stage with good mids for around $160?

The Beyer DT880 Pro 250-Ohm is a better choice for just about every type of audio (over the DT770/DT990)

But finding a used DT880 Pro 250-Ohm for around $160 might take some some patients.

post #1095 of 1655
Quote:
Originally Posted by PurpleAngel View Post

The Beyer DT880 Pro 250-Ohm is a better choice for just about every type of audio (over the DT770/DT990)

But finding a used DT880 Pro 250-Ohm for around $160 might take some some patients.

What would be the next best thing? I was thinking the DT990 Pro cause' its open or the DT250

 

If I get a 250ohm version will my Xonar DG be able to run it good enough?


Edited by Supertoaster - 10/29/12 at 12:23am
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