Pioneer SE-MJ591

General Information

[From Product Info Sheet] - To commemorate over 50 years of headphone development, Pioneer is proud to introduce its flagship SE-MJ591 audiophile-grade headphone. Representing the culmination of Pioneer’s investment in headphone research and development, the SE-MJ591 combines superb audio quality and craf tsmanship in a compact and ultra-comfortable design to offer the ultimate music listening experience.

Latest reviews

Pros: Musicality. Seductive sound. Enjoyable to use. Well made. Portable. Value.
Cons: Comfort for long sessions.
Not the best spec wise but so much fun to use. Musically expressive with an emphasis in the midbands. Everything about this can is endearing. I find the 591's sound addictive and seductive. 
A stand out product. 
Pros: excellent sound,non fatiguing, Mids, Easy to drive, very musical.Forgiving
Cons: Retail expensive, light highs
I am new here and had headaches reading about headphones. I am no audiophile and just have a laptop to enjoy my music from. No "gear" as yet. I love vocals so no V shaped signature for me. I had budget of about 250 USD and was looking for a closed can because, curiously, I thought that they sound better.
I think it’s too bad that most of us have to buy headphones without getting the chance to actually listen to them so I went to guitar center and tried AT-M50 and Shure SRH 840. I bought SRH 840 and was very excited. However, after using them for a few days, I found 840s to be very very heavy and not that musical. I define musicality as something in the sound signature that makes your music pleasing.
So I returned the Shure and went to best buy and tried few headphones like Senheiser HD 380, HD 558, B&W p5, ATH AD900, AKG 501(or 550) because these were the major brands I had read about here. I used Best buy set up music and my own GS3 for comparisons. After I was not much impressed with any of the above, I stumbled upon Pioneer mj 591 for price of 300 USD. I was blown away. They sounded so good out of both sources. So I wrote down its name and decided to do some research about it. To my surprise, it was not a much favored headphone here at head fi. After some help from members here in related thread, I ordered it online for 180 USD and have been enjoying it for a few days.
I don’t know what the hoopla is about it not being audiophile quality. They sound detailed enough to me. They are very comfortable and I wore them for about 8 hours on very first day. Design is solid too.
Sound signature is very pleasant with emphasis on Mids. Bass is very nice but not that much punch. I was surprised to see this headphone in basshead club. Highs are really light and you need to EQ them. I am not a big treble fan anyway because too much of it makes my ears hurt.
They are very easy to drive and I have forgotten about Fiio amp I was reading about. They can be very loud. I think I know the difference between loudness and sound quality and with a little EQing in the foobar, they give me perfect sound.
I am very very happy with them and I thought I should contribute a little information on this under rated headphone.
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Pros: Excellent quality, design and SQ
Cons: Bass light
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I picked these up based on the new rave review in Stereophile. I'm listening to these now fresh out of the box plugged straight into my iPhone. I've been on a kind of a little quest to find something good for mobile use out of my iPhone. Definitely mid-centric, but that's okay. Craftsmanship and SQ are top notch considering my application. I wouldn't use this on my home rig really, but for on the go with no amp I'd rate it 4.5 stars. There's good detail without highlighting the deficiencies in my source which is quite a feat. Headband needs to be stretched out for sure for comfort. I'm glad to have these.
I've heard a lot of cans out of the iPhone, and this one is my favorite for now. My bet is that I'm going to favor the Fidelio L1 for this application when it gets here tomorrow, with it being open and having more bass. I will keep these regardless because of the nice compact design.
agree completely except bass is good enough for me


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