FiiO's New PCOCC-A Cables - Impressions, Reviews, Discussion
Dec 25, 2013 at 1:20 AM Post #16 of 22
  Hey guys...I was just wondering something...Since the PCOCC-A cable uses only a visible two strand; how exactly are they connected to the L/R/Ground?

I'm guessing there are two ground wires that run concurrently with the L/R channels?
 
Here's my review:

First of all, I would like to apologize to Fiio for the delay in this review. Life and school got in the way of me writing this review. Now that I’m at home though, here goes!
I would like to greatly thank Fiio for giving me the chance to try out their new cables.
 
Personally, I found it quite interesting when I heard Fiio, who I had always thought of as an amp and DAC company, was making cables. I received both the RC-MH1 for the Phillips X1, Sony 1R series, and V-Moda headphones and the RC-UX1, a 3.5mm extension cable.
 
While I don’t any of the abovementioned headphones that the RC-MH1 was made for, I do own multiple V-Moda cables for my modified Fostex T50RP headphone and I was curious to see how the RC-UX1 worked with my T50RP, and how it compared to the V-Moda cables I own.
 
Both the RC-MH1 and RC-UX1 both share the same Furutech cable and aluminum connector on the end that connects to your music player or amp. The cable material itself is soft and flexible, but highly prone to memory, as I demonstrate in the picture below:

(This is what happened after I wound the cable around my hand and placed it on my bed.)
 
The connectors are a nice brushed aluminum though, and the textured portion makes it easy to unplug from devices. The strain relief is good without being excessive. While it doesn’t bend very much when the cable is pulled at an angle, it seems like it will do a good job keeping the cable from being pulled out of the connector.

 
The female end of the RC-UX1 is plastic, but it’s a durable feeling plastic. Unlike some of the cheaper 3.5mm extension cables I’ve had before. Although you can see the molding where the two pieces of the connector were fused, it is much less noticeable than some of the other female 3.5mm connectors I’ve seen in the past.

 
If I had one complaint about the connectors, it would be the headphone connector for the RC-MH1 and how excessively long it seems. I’ve used the V-Moda M-100 before, and seen @miceblue's set using the RC-MH1 cable; the connector seems excessively long even for that. So much so that you could bump it with your shoulder while wearing them without much effort.

 
Comparing the RC-MH1 to the V-Moda audio only cable, the V-Moda is softer and more flexible, but to be honest, I’ve never liked 45-degree angled connectors that much, which is what one end of the V-Moda cable is. To me, it’s just a compromise between a straight connector and a 90-degree connector that feels awkward no matter how you use it. I much prefer the Fiio’s straight connector over the V-Moda. The V-Moda cable is also much less prone to microphonics, but that is because the cable is covered in a material I can only closely describe as shoelace material, which some people may find annoying.
 
I will go into sonic impressions later when I have all of my reference gear available. While I haven’t heard a night and day difference with my T50RPs, and I don’t think I will when I do compare them, any headphones that sound better with a lower output impedance may improve with the RC-MH1. When I measured the RC-MH1’s impedance in comparison to the V-Moda audio only cable, the impedance was about half (~4 ohms for the V-Moda, ~2 for the MC1). Don’t quote me though, because I don’t have my multimeter with me to verify.
 
In closing, I think Fiio did a nice job with the cables overall, despite the microphonics and wire memory. If the stock cable on your headphones break, or you need a nice extension cable, these fit the bill. I also think Fiio may want to consider making a version of this cable with a right angle connector that could be used with the Fostex T50RP, since most people dislike the stock cable, and the closest replacement available is the V-Moda audio cable, which is not idea since it has a 45 degree connector, as mentioned above.
 
Jan 31, 2014 at 1:49 AM Post #17 of 22
Well then...I was going to finish up my review on Saturday after Chinese New Year.

Unfortunately, as I found out today, the RC-MH1 cable is starting to lose its connection at the end with the metal housing. I thought it was the C5D amp at first, but unless the headphone jacks of the C5D, iPod Video, iPhone 4S, and both mini-jack connectors on the V-MODA M-100 all suddenly decided to die on me today, I think the cable is losing its connection somewhere. :frowning2:

When I wiggle the cable at the end with the metal housing, the left audio channel gets cut off.
 
Feb 3, 2014 at 3:08 PM Post #18 of 22
Okay, I wrote the last parts of my review and will update the first post shortly.
 
 
Build Quality and Usability
General Overview
[said stuff here]
  1. Cable may fail at the stiff strain relief, and especially at the end with the metal jack enclosure (the left channel of the RC-MH1 cuts off at certain angles depending on how the cable is bent at this connection)
  2. Slightly improves the sound quality (see Sound Quality section below)
 
 
 
Sound Quality
[said stuff here]
 
However, after trying and failing to accurately volume-match between the two cables, I decided to do a different way of evaluating the sound quality of the cables. Over the past month, I have been using the RC-MH1 with the V-MODA Crossfade M-100 pretty much every weekday while commuting to and from school, in addition to walking between classes. After getting used to how the two sound together, I recently switched back to the stock V-MODA SharePlay cable. My theory is that if you can hear a difference from what you're used to, then there is a difference in sound quality (it may not the most scientific reasoning, but it makes sense for us humans :)). Likewise, if you can hear that difference in a noisy public bus, then there is a difference in sound quality. I tried to compensate for the RC-MH1's lower resistance value by turning up the volume level (6 volume steps when using the JDS Labs C5D) when using the stock V-MODA SharePlay cable; yes, the volume levels were different and the audio being played through the SharePlay cable was louder than through the RC-MH1. Benefit of the doubt, the SharePlay cable should theoretically sound better because louder is better, right? Well actually I didn't find that to be the case, and I was pleasantly surprised.
 
Throughout my listening tests, I found that the RC-MH1 has a slightly more defined and deeper bass response. Switching to the SharePlay cable, I noticed that bass notes didn't hit as deep and they sounded a bit more blurred/muffled/not-as-well-defined. At the opposite end of the spectrum, I also found the RC-MH1 to have a slightly better-defined treble response. Fine details stand out a little more and are more well-defined with the RC-MH1; this is especially notable with Daft Punk's "Motherboard" song in the second half when the "bubble sounds" are played. The differences are pretty subtle, but after listening and getting used to the RC-MH1's sound over the past month, I do miss the deeper lows and more well-defined highs when switching over to the SharePlay cable.
 
 
 
Conclusion
Apart from the cable breaking at the strain relief, I really think the RC-MH1 is a great replacement cable for standard cables that use a 3.5 mm connector. The cable length is just about right for portable use; it's not too long, nor is it too short (at least for me). Although the cable itself feels kind of cheap with the matte-finished rubber-like material, and it retains kinks and bends, it's actually really easy to manage and I wasn't bothered at all when handling it with portable use.
 
Going by FiiO's pricing for their products, I think the RC-MH1 will be a great purchase for a replacement cable, or for just improving the sound experience for the user. As they say, upgrading the cable should be be the very last upgrade in an audio system and I feel that I squeezed the last 2% (an arbitrary number) out of the V-MODA Crossfade M-100.
 
If I had any advice for FiiO to improve this product, it would be to make the strain relief at the end of the cable with the metal jacket more robust (more flexible, longer strain relief section), and to make the other narrow-end of the RC-MH1 shorter and/or more flexible as well. After a month's worth of portable use, I'm kind of disappointed that the cable is already losing connection.
 
 
Other than that, thank you FiiO again for allowing me to participate in this product review! I really enjoyed writing this review and I hope to see a better strain relief implemented in future products.
 
 
 
 
  Hey guys...I was just wondering something...Since the PCOCC-A cable uses only a visible two strand; how exactly are they connected to the L/R/Ground?

I think the shield layer of the cable connects to the ground pin of the headphone jack (kind of like a coaxial cable maybe).
http://en.wikipedia.org/wiki/Shielded_cable
http://www.yourdictionary.com/coaxial-cable
 
Feb 6, 2014 at 9:49 PM Post #19 of 22
Is this cable shielded from EMF/EMI/RF? I have issues with picking up AM stations on my HD598s. It looks like it from that picture up top, but I'm confirming before I buy.
 
Feb 6, 2014 at 10:24 PM Post #20 of 22
Is this cable shielded from EMF/EMI/RF? I have issues with picking up AM stations on my HD598s. It looks like it from that picture up top, but I'm confirming before I buy.

I can give that a test tomorrow. I usually don't have EMI issues unless I'm using my phone, but I know of a place that has poor cell phone coverage and picks it up such noise.
 
Feb 20, 2016 at 11:35 PM Post #22 of 22
I assume this cable would work with the Sennheiser HD558 since it works for the HD598. Looking for a shorter replacement cable for it. 
 

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