First of all I would like to thank Zach from ZMF Headphones for his generous donation of the new ZMF x VIBRO MK II closed headphone. It was actually the first pair released to the public and auctioned at the NY Head-Fi meet on Saturday November 14^th 2015. I was the lucky winning bidder. In my search for a good closed companion for my Sennheiser HD600 I ended up with the Audeze EL-8 closed. It was a very good sounding headphone and very comfortable. Within a couple weeks of use it began to develop known issues. I was pretty upset as I really liked the headphone. It was going to be returned and alas my search was to resume. I was planning on attending the upcoming NY meet and figured it was a good place to start. Long story short I listened to several closed options and kept going back to the ZMF table. After a few listens I knew the Vibro MK II was going home with me that day. My quest was short lived. I almost feel guilty about what I paid. ALMOST. 
The Vibro MK II is a costume upgrade of the Fostex T50rp MK III driver and baffle. The build quality is top notch. Each ZMF headphone is hand made to order. There are several choices   of ear pads and headbands. Many wood colors and finishes are also available. Zach is willing to custom tune the sound to meet customer’s needs, within reason. It uses mini XLR connectors for the cable connection. The comfort is ridicules as they can be worn for hours at a time. I’ve had them on for up to 5 hours lying in bed with few, if any, adjustments needed.
 
Sound
The Vibro MK II has a very balanced and natural sound. The highs mids and lows blend together nicely. They are very open sounding with a nice wide soundstage. I don’t miss the openness of my HD600 while using them. In fact I haven’t used the HD600 since bringing the Vibro home. They are a little less detailed than the EL-8 but that’s not a bad thing. The El-8s were very unforgiving with the source. Bad recordings sounded bad. I find no sibilance issues with the Vibro MK II vocals are very smooth and lush. The EL-8 had some sibilance issues mostly with female vocals. Instrument separation is very good. 
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Bass
The bass is tight and full with no sense of being boomy or exaggerated. There is no lack of bass but It’s not for hard core bass heads. You hear more than feel it. There are 3 tuning ports on the cups. You can change the bass a few dB’s by plugging the holes to suit your taste. I have only played with them a little. I did notice a slight difference when using them. I’m enjoying the stock sound but will mess with the tuning ports at some point , I’m sure.
 
Mids and Highs.
The mids and highs are well defined with no sense of harshness or congestion. The vocals are clear and focused. They are very lush and articulated. The detail is just right. Everything from the vocal breaths to the shimmer of the high hats is crisp and transparent.
 
The ZMF x Vibro MK II is an outstanding  headphone. It’s not only beautiful to look at and extremely comfortable. It sounds amazing. In a hard to find class of $400-$800 closed headphone it shines. There is just something special about a custom headphone. The only real issue is the wait. It’s 4 to 6 weeks to get your order but well worth it. Zach is readily available and the customer service is outstanding. After the auction Zach brought me a box and standard cable. I tried the cable and it had a short in it. I went over to the ZMF table and asked for a replacement no big deal things happen. Zach handed me a $129 braded upgrade cable. That’s customer service.
 
http://www.zmfheadphones.com/
 
These are actual pictures of my ZMF x Vibro MK II
 
 

 

 

 

 
 
 

I began to search for a shorter cable for my HD600 just because the stock cable is to long for using with a portable device. I didn't want to spend to much under $100. I did the standard Amazon and Ebay search finding some nice reasonably priced cables but nothing that moved me. Finding that the majority were from China I decided to give AliExpress a look. I came across the Tennmak company that offered a very nice looking custom cable. The cable is a braided flat 6 core single crystal copper + crystal made of silver mix. They will customize the cable to your liking plug size mike or not and headphone type. HD600/650 HD800 HE500/400 and other higher end headphones and IEMs. You also get several color choices. I ordered a Pure black 3.5mm straight plug no mike with HD650 connectors. After placing order Tony the owner contacted me to verify my order to make sure it was correct. Excellent communication and customer service. Cable was made and shipped within 24hr of placing the order. !0 day later cable was in my hands. The cable is very thin but seems like it will be very durable build quality was very good. Stress points seemed strong and the connectors were also done very well. I was very pleased. Plugged the cable into my Hd600 perfect fit. Hooked it up to my FiioX3 E12 rig. I found the sound to be excellent it seemed to bring out the highs somewhat. A little extra shimmer on the cymbals. I took the cable to the New York Head-Fi meet this past Saturday to get a few opinions on it. I had the pleasure of listing to the HD650 with the cable on a very high end  McIntosh Adcom set up. They sounded amazing. The owner of the set up was quite impressed with the cable. On my way out the door he stopped my and said he was glad he caught me because he wanted the cable info. This is a great cable for anyone looking for a short cable for there HD600/650 or other high ends phones. The amazing thing is the price. $43.79 delivered could be higher depending on connectors and length. The standard which I ordered is 47 inches connector to connector.
 
http://www.aliexpress.com/item/Tennmak-earphone-detachable-cable-with-microphone-remote-for-TF10-5PRO-W4R-UM3X-IE8-IE80-HD600-SR940/2035753451.html