Would an AudioQuest - Dragon Fly Black be able to power a T50 mod sufficiently?

[chimney189]

As the title states!

I'm also wondering if anyone has had the chance to compare the Black to the Red?
I'm mainly looking to power my Mod House Audio Argons.

 

[youngarthur]

Type Audioquest Dragonfly in the search engine, it will give you your answers.

 

[cossix]

Do you know the power output of the Dragonfly? I can't find specs anywhere but if you knew how much power it put out and how sensitive the T50 is then you could make a decent guess on how well the Dragonfly would drive them

 

[chimney189]

Do you know the power output of the Dragonfly? I can't find specs anywhere but if you knew how much power it put out and how sensitive the T50 is then you could make a decent guess on how well the Dragonfly would drive them

1.2V for the Dragonfly Black and 2.1V for the Dragonfly Red

T50 sensitivity: 92Db at 1mW

How does one calculate if it's enough?

 

[FumblingFoo]

T50 impedance specified?

 

[chimney189]

Here is everything that I could get:

Impedance: 50 ohm
Sensitivity: 92dB (at 1kHz, 1mW)
Frequency Response: 15Hz – 35kHz
Maximum Input Power: 3000mW

 

[FumblingFoo]

Ok, excellent. To reach 105db at 0dbfs (the absolute loudest sound that can be produced), you'll need 1.0v. This'll be just enough volume (being generous with a 10db buffer), listening at a pretty loud level, with modern, loud music, but not loud enough will really cranked-up volume (which I'd consider beyond a safe listening level). For quieter tracks with more dynamic range like classical or film scores, you'll need more power. With the 2.1v Dragonfly red, you'll get a bit more headroom (about 6 db or 1.5x as loud).

Edit: Note - this is only if the dragonfly can deliver 2.1v into 50ohms. Somebody please correct me on this if it say, only does so at a higher impedance. 92db headphones are relatively hard to drive

 

[chimney189]

Perfect! Thanks FumblingFoo!

 

[FumblingFoo]

No prob . Be sure to check the edit I just made in my above post, e.g. the dragonfly red might put 2.1v into 100ohm headphones but less than that into 50ohms (this isn't specified), so to be safe I definitely recommend going with the higher voltage model.

 

[chimney189]

Agreed.
I was lucky enough to find one in the classified ADS used.

 

[cossix]

92db is not very sensitive so I'm not sure if it'll be a good match. I see people listing voltage measurements but I can't find any power measurements in mW. I don't understand why they wouldn't list that specification

 

[FumblingFoo]

Yeah, there's only enough information to get into a general ball-park estimate of whether the phones are compatible or not. I used a handy excel spreadsheet calculator to do a little magic with the available information.

http://www.apexhifi.com/specs.html

 

[chimney189]

I guess I'll find out soon enough if the matching works!

 

[cossix]

Good luck!

 

[FumblingFoo]

Ditto