Question 1

Are these as good as Beats by Dre?

Accepted Answer

Beats by dre has a tuning that can be summarized as a trainwreck. 
Beats by dre have bloated bass and poor upper range that sounds completely unnatural and not clear at all. Sennheiser hd600's are a reference class headphone; which means they're tuned to be as natural as possible. They have what is referred to as a "ledgendary" tuning (which i agree with). 
If you like to hear what you're listening to in all its detail, then hd600's are the better option. If you don't care about quality at all, and only like poorly executed bass, then the beats are the better option. 
In my opinion, beats is outclassed even by cheap chinese audio brands like moondrop and tangzu. Beats can't even compare with sennheiser as a brand, let alone headphone vs headphone. 
Its like asking if someone who has never played a game is as good as a pro. Hd600's will last you for life and are all you need for good quality sound. 
However, you will need an amplifier (apple dongle for example) to get these to a loud enough volume.

Question 2

sound leakage

Accepted Answer

Ok, I am in my mid 50's and I do not blast the volume so keep that in mind, as a reference on my iPad I listen with the volume at about 2/3 and on my iPod classic the volume is just over 1/2. The sound leakage does not bother my wife (she is easily bothered by my music) with her sitting 5-6 feet away. Along the same vein the headphones do not block outside sound, if you pause the music you can easily carry on a conversation without taking them off. Hope this has some usefulness.

Question 3

bass response?

Accepted Answer

I'll put it this way: These cans play the song that was recorded the way it was recorded. If the artist didn't make it thump these won't make it thump. So if you want your headphones to add bass that wasn't recorded by the artist then these won't do that. These play EXACTLY what was recorded. So if you don't like the bass response of these then you are a person that likes your music with added bass that the artist never intended.

Question 4

Where is this Sennheiser HD 600 made ?

Accepted Answer

Sennheiser has a manufacturing plant in Ireland where some models of their headphones are made.  The product sheet for my pair of HD600s was printed in Ireland and the general word on the street is this model is made there.  The HD800 is currently manufactured in Germany but most of the other models are made in Ireland with a few in China.  A Google search of 'HD6600 made in Ireland' will get you some discussion boards on this subject.  Hope this helps.

ASIN	B00004SY4H
Additional Features	Lightweight
Age Range Description	Adult
Antenna Location	Music
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#2,185 in Electronics ( See Top 100 in Electronics ) #94 in Over-Ear Headphones
Brand Name	Sennheiser
Built-In Media	Adapter, HD 600
Cable Features	Detachable, Without Cable
Color	Black
Compatible Devices	Music Production Equipment, Laptops, Desktops, Gaming Consoles, Televisions, Hi-Fi Systems, Professional Audio Equipment
Connectivity Technology	Wired
Control Method	Touch
Control Type	Noise Control
Customer Package Type	Standard Packaging
Customer Reviews	4.7 4.7 out of 5 stars (3,164)
EU Spare Part Availability Duration	2 Years
Earpiece Shape	Over Ear
Enclosure Material	Plastic, Metal, Oxygen-Free Copper
Frequency Range	12-40500 Hz
Frequency Response	40500 Hz
Global Trade Identification Number	04044155249545
Headphone Folding Features	Over Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	On Ear
Impedance	300 Ohms
Is Autographed	No
Item Weight	9.1 Ounces
Manufacturer	Sennheiser
Model Name	Sennheiser HD 600
Model Number	4465
Noise Control	None
Number of Items	1
Sensitivity	97 dB
Series Number	600
Specific Uses For Product	Multi-Purpose
Style Name	HD 600
UPC	615104044654 615104340459
Unit Count	1.0 Count
Warranty Description	2 year
Water Resistance Level	Not Water Resistant
Wireless Technology	Wired

HD 600 - Audiophile Open-Back Dynamic Wired Headphones Over Ear with Natural Soundstage and Premium Comfort for Music Lovers, Open Metal Earpiece Covers, Black

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