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GSP cable for LCD-2

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    Posted: 31 Jul 2013 at 10:44pm
The back story is that Morris Minor (Bob) kindly loaned me a cable for his LCD-2's which John and Graham had custom made.

Frankly the cable is an excellent upgrade which I will be looking at in the Autumn. I used a number of tracks and compared to the stock cable and my DIY 5m cable. These were not blind tests as I would have tripped up when stepping back and forth from the sofa to the hi-fi...

My listening comments can be summarised as follows:

- I was stunned by the HF clarity. It is detailed without brightness. Cymbals, finger noises on strings, breathing are all audible if picked out, without being obtrusive. This made the HD Bach Harpsichord Concerto and REM's Out of Time come to life, and ripped CD's of Dislocated Boy and Killing in the Name were dynamic, instruments clear in the mix, and exciting to listen to.
- The bass is deeper so kick drums were tight thumps, double bass was present in the orchestra. The Massive Attack tracks I tried were awesome.
- The midrange of the LCD-2's seems to be slightly more detailed than with my cables, the phrasing of the backing vocals on the REM tracks could be easily picked out.
- I think the stereo image is a bit wider with the sense that tracks on the far left or right were well outside my head.

The overall impression is a musical and natural reproduction of the music. It is what the LCD-2's do, done even better.

Thanks to John and Graham for their R&D. Bob for lending me something he must be missing!


Edited by Fatmangolf - 31 Jul 2013 at 10:51pm
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote morris_minor Quote  Post ReplyReply Direct Link To This Post Posted: 01 Aug 2013 at 9:17am
Thanks for your thoughts on this cable Jon! They thankfully echo mine, and your conclusion "It is what the LCD-2's do, done even better" seems a perfect summing up. I'll post further comments when the cable's back with me in a few days, but in the meantime here's some technical info that Graham sent me, along with a picture of the GSP cable, and for comparison (visually) the stock ribbon cable.

Originally posted by Graham Slee Graham Slee wrote:

It's a tinned copper wire cable. It exhibits a similar capacitance to the Sennheiser cables. It's around 600pf. I don't believe these make the difference. It is more likely the insulation (as I keep preaching).

The inner insulation is polypropylene. The shield is mylar/aluminium foil, with the mylar touching the polypropylene and there is a tinned copper drain wire outside the shield. Overall jacket is PVC.

The drain wire is used as the "returns" (commons/0V).

What I found when I used to screen print (when I made printed circuits many years ago) is polypropylene would not print - it doesn't like stuff in contact with it. You have to oxidize it (flame torch it - a bit dangerous in a fume ridden screen print area) for anything to stick to it.

Therefore I'm just assuming (like I always do...) that wire and polypropylene extruded over it don't get on mutually and they are unstuck...

Other insulators stick to the wire (apart from Teflon which is PTFE).

As there is no such thing as an insulator - just poor conductors - therefore there is electromagnetic wave movement in insulation and if stuck to wire, the skin effect is stalled by a slower moving electromagnetic wave. If the insulation isn't stuck to the wire the skin effect works - the electromagnetic wave is allowed to propagate at higher speed.

The above is the way I understand it, but you may wish to read http://en.wikipedia.org/wiki/Speed_of_electricity
regarding electromagnetic waves.



Another picture on an earlier thread.

The LCD2 with the stock cable:




Edited by morris_minor - 01 Aug 2013 at 9:23am
Bob

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Post Options Post Options   Thanks (0) Thanks(0)   Quote morris_minor Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2013 at 9:21am
Ok. Having got reacquainted with the GSP cable I find it hard to add to the excellent comments Jon made earlier. 

Detail, especially in highs and mids, is more apparent and the soundstage is wider and deeper. Bass remains fullsome but not overblown, and I thought it was slightly more controlled than the stock cable. This seems "boring" now in comparison to this offering from Graham and John.

I could go over the top and describe the listening experience with many albums, but I'll confine myself to two. The Florilegium LP of Vivaldi's Gloria in D (Christopher Hogwood) now had a stunning clarity (as opposed to just 'good') in both vocal and instrumental lines, and the acoustic now gave an almost holographic feeling to the music. World Circuit's Orchestra Baobab album 'Made in Dakar' exhibited all the exuberance present with the stock cable but added a discernable upping of the toe tapping quotient with improvements in dynamics, detail and depth.

I should think there's undoubted "synergy" going on here with the Solo ULDE, and in the case of the Vivaldi LP also the Reflex M and connecting CuSat50s.

This prototype cable is a lot less flexible than the standard cable but I didn't find this a problem. LCDs aren't a headphone for mobile use IMO, they're too big and heavy. A benefit though is that it doesn't get tangled and twisted like the stock cable.

I've no idea if Graham will add this cable to the growing range of GSP cables, or even if versions for other headphones (Sennheiser?) are possible. The Audeze 'phones use standard mini-XLRs so this simplified the connections.

I'll have to echo Jon's conclusion about this cable. It takes everything we like about the LCD2s and just makes it better.  

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Bob

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Post Options Post Options   Thanks (0) Thanks(0)   Quote suede Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2013 at 2:53pm
Any chance of having a HD250 replacement cable made at a reasonable cost? Smile
I bought an original replacement cable from Sennheiser but it didn't sound the same to me. The soundstage and dynamics got much more cramped and listening got dull in comparison and despite myself I tried to have it burn in by using it for a month or more but no luck. So now I use the old cable although it sometimes loses connection with the left driver if the cord gets pulled. I dread the day this becomes too bad and I have to return to the inferior new cable.
Perhaps there are more people on this very forum who'd be interested in the possible upgrade this might bring to already one of the greatest headphones not currently on the market. Tongue
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2013 at 4:53pm
OK, I'll try and find some plugs for them... Cry
Not simple enough for Google-Bot to understand...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote morris_minor Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2013 at 5:04pm
Senny owners: please form an orderly queue behind suede . . .  LOL
Bob

Majestic DAC/pre-amp
Accession MC/Enigma, Accession MM, Reflex M, Elevator EXP, Era Gold V
Solo ULDE, Novo, Lautus USB and digital, Libran balanced, CuSat50
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Drewan77 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2013 at 5:49pm
If HD250/650's share the same cable connector, then I'm in....Smile

My employers have been using 3D printing for a while now and it is definitely the future…send off your bespoke design and hey presto, a little while later a working model arrives. Mr Graham Slee is the first living, breathing iteration of this. Where else would anyone get such responsiveness? Highly impressive

 

Let’s just hope that when he receives his 60,000 service they don’t turn down the gripe-ometer, we all enjoy that part of the current version!




Edited by Drewan77 - 09 Aug 2013 at 6:04pm
Older than I once was, younger than I'll be
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Andrew
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