Question 1

Will everyones ears fit into these? I like Astro

Accepted Answer

My family stood side-by-side, ear-to-ear so we could all listen, but the headphones were too small to Fit “everyone’s ears into these”...plus my daughters ears get pretty waxy so the sound quality playing out of her ear hole would have been muffled.

Question 2

What is the difference between the 250 ohm and 32 ohm models?

Accepted Answer

The Ohm is the unit of electrical impedance. It's a measure of how difficult it is for current to flow through the conductor. A conductor with a higher impedance will require a higher voltage to push an equivalent current level through it than one with a lower impedance. A 10-volt source can drive 40 milliamps (.04 amps) through a 250 Ohm impedance, but you only need a 1.5V battery to push 47 milliamps through a 32 ohm impedance. This is why 32 Ohm headphones are recommended for portable equipment (phones, etc), where low-voltage battery sources are common.

A 600 Ohm headphone is more appropriate for studio work, where the amplifier driving them often uses +/- 15 volts (a 30 volt swing).  A 250 ohm headphone is one that attempts to bridge both worlds - low enough to be used with battery powered sources, but "stiff" enough (electrically) to take advantage of the benefits that a big voltage swing provides, such as a higher s/n ratio.

A lower impedance headphone (everything else being equal) does NOT require less power to use. In fact, it requires slightly more. But you do not want to use a 600 ohm set of headphones (in general) with a low-voltage amp such as one the one in your phone or laptop. Generally, they will not play as loudly, as they will require more current than the amplifier can provide into the higher impedance.

Question 3

Do these headphones have a removable cable?

Accepted Answer

I have the dt 990 pro 250 ohms, and no they do not have a removal cable.

Question 4

Will these completely encase the ear? I can't stand headphones that put the cushion on the ear instead of around it completely, only touching the head

Accepted Answer

As long as your head is not very large, it can wrap your ears. if you want choice 250Ω or 600Ω before you need Bought a Amp。

ASIN	B07DJ17FTG
Additional Features	Lightweight, Noise Isolation, Tangle Free Cord
Age Range Description	Adult
Antenna Location	Music
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#38,604 in Electronics ( See Top 100 in Electronics ) #712 in Over-Ear Headphones
Brand	beyerdynamic
Built-In Media	1/4" Adapter, Beyerdynamic DT 990 - 600 OHM, Hard-shell Zipped Carrying / Travel Case
Cable Features	Tangle Free
Carrying Case Color	Black
Carrying Case Material	plastic
Carrying Case Weight	8 Ounces
Color	Black
Compatible Devices	Devices with a 3.5mm audio output or compatible with high-impedance headphones
Connectivity Technology	Wired
Control Method	Remote
Control Type	Media Control
Customer Package Type	Standard Packaging
Customer Reviews	4.5 4.5 out of 5 stars (704)
Earpiece Shape	Over Ear
Enclosure Material	Aluminum
Frequency Range	5 - 35,000 Hz
Global Trade Identification Number	04010118718014
Headphone Folding Features	Over Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	Over Ear
Impedance	600 Ohms
Is Autographed	No
Item Type Name	Premim over-ear open-back stereo headphones
Item Weight	703 g
Manufacturer	beyerdynamic
Model Name	DT 990 Premium
Model Number	718017
Noise Control	None
Number of Items	1
Sensitivity	96 dB
Series Number	990
Specific Uses For Product	Music
Style Name	Retro
Subject Character	no character
Theme	Music
Unit Count	1 Count
Water Resistance Level	Not Water Resistant

beyerdynamic DT 990 Premium Open-Back Over Ear HiFi Stereo Headphones

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