Just be aware that if you intend to buy one just to use with the A4000 you would only be getting a little more volume over the phone socket output and then you are in deafness territory. I know theres a bunch of cheap bluethooth headsets out there and Ive gotten pretty lucky with my picks. Anyone who says that their $20 off-brand earbuds produce the same quality of sound must be (at least partially) hard of hearing. Having said all that, would I recommend this system to a friend? Yes! So I do feel really bad that Im leaving this post for the vendor, cause maybe I should have contacted them first. Por lo que evitaría x completo pensar en utilizarlo para hacer abs y press declinado, así como press plano con peso elevado. After just a few days I am highly impressed with the clarity and separation of this outstanding cartridge and stylus. 5x32. Again they get better as the days go on. Updated review: I bought 2 of these but one came a day later.