Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems Show Me Your (Gear) Rack!

As noted in other recent posts lately there hasn't been a lot of positive stuff goin' on 'round here. So I thought we could while away (waste!) our time waiting for news of the fabled HDMI/MHR device in a more positive fashion. I'm hoping fellow HH'ers will post photos of the racking or furniture beneath their M gear. I hadn't intended to show off my latest project until it was completed but here it is anyway, a work in progress...

I guess I ought to preface this rack design post by stating unequivocally: Although I currently enjoy my music played back multi-channel style and the same "Big Rig" performs cinema duties, I'm still very much a hair shirt wearing, "everything-makes-a-difference" audio dweeb. My current predominantly digital signal path and the mostly Meridian gear which play host to it does seem less affected by audiophile tweaks than the tube two-channel gear I once owned. However, I still find attention to SPDIF cabling, power conditioning, and mechanical vibration isolation all make audibly positive differences. The mix of audio and video in my present Big Rig with video's competing formats requires much more extensive racking. I am happy with some of my gear support elements. The custom Corian sand-box "shelves" and Black Diamond Racing isolation cones and pucks all work brilliantly. However, the row of low welded Target tables under the very heavy "sand box" isolation shelves leave something to be desired in rigidity, but also in effective use of space and aesthetics.



These complaints with my existing racking have driven my interest in finding something better. Unfortunately even the tweak-iest high end "audiophile approved" rack manufacturers failed to address all my requirements. In this case my decision to go DIY was totally about function rather than saving money. My steadily refined rack design was far beyond my DIY skills, but owning a high-end bicycle shop provides access to craftsmen with the abilities and tools to realize my vision. Thus this is more of a Design It Yourself rather than a Do It Yourself project. My actual build thread progress can be found here on the CAM Forum. For this post I'll stick to a Coles Notes version of the build.







The above renderings and drawings are the original rack concept and despite some last minute material changes are still a pretty accurate representation of how the finished product will look. The plan was to build the rack frame from powder coat finished high strength thin-wall steel tubing. The frame would use 3" square for the main posts and a combination of 1"x2" and 1" square for the framework. The all the smaller diameter tubing will be filled with low expansion foam to damp the steel's tendency to ring while the 4 main posts are filled almost to their open tops with sand. A BDR (Black Diamond Racing) isolation Puck "floats" atop each sand-filled pillar and provides a footer for the BDR cones which interface with the corners of the 6' wide upper shelf. The long upper shelf was originally to have been CNC milled from a 3" thick lamination of ApplePly. The milled plywood shelf would have been reinforced with a pair of inset 2" cro-mo "angle iron" stiffening ribs running almost the entire length of the shelf. This would have ensure adequate stiffness under load. The top shelf features 3 milled out wells, each to be partially filled with sand which would then float a Corian slab which in turn the component would rest upon. All the individual lower shelves are Corian sandboxes as well. Each of the six lower sandbox shelves rests on 3 point levelling set screws inset into the frame. By this point you've worked out that I'm a fan of "BrightStar"-style sand filled isolation!

Over time the design evolved some. Ultimately I chose to go with brushed thin-wall stainless steel for the frame. A gifted local custom bicycle frame builder, Hugh at True North Cycles, has almost completed the frame with just the final finishing work left to go. Below are pictures of the almost completed rack with close-ups of some of the detail work. Other than the material and finish change, the rack frame remained true to the original design.









The top shelf was a tricky proposition from the start. Aesthetically I was stuck on it being a single long span which under the weight of the shelf, sand, and components- had the potential to create rigidity problems. Well Gerry of Apex Composites, the only nearby CNC house with the a large enough mill, suggested that rather than a steel reinforced plywood shelf, we should make it from carbon composites. A shelf made from carbon wrapped structural foam would be a fraction of the wooden shelf's weight- sub-10 pounds vs 100 pounds! A composite shelf could be stiffer. Finally the composite construct of bonded foam, uni-direct carbon, and woven carbon with a "dress layer" lamination would be self damping. The three matching "floating" isolation shelves would also be made from structural foam and carbon. Well what wasn't to like with that! Yeah it drove the price up significantly but its only money. Full speed ahead! Below are the CNC-ready CAD drawings for the top and floating shelves.





Summer holidays have hampered the progress of my shelf somewhat as its a side project for Gerry at Apex but we are getting there. Two slabs of dense structural foam were laminated and then CNC milled to the desired shape. Lengthwise recesses were milled top and bottom to accommodate layers of unidirectional carbon which provides the strength stiffness. Then the entire thing was sheathed in regular woven carbon and "Peel-Ply", which when removed leaves a rough finish carbon which doesn't require sanding for subsequent laminations. Below are bottom view photos of the shelf. You can clearly see the underlaying strips of unidirectional carbon in the photos but it will be invisible upon completion.

[img]http://i299.photobucket.com/albums/mm295/VinceHoffman/IMG_2832.jpg[/img]

[img]http://i299.photobucket.com/albums/mm295/VinceHoffman/IMG_2833.jpg[/img]

At this point we performed a deflection test on the shelf. We supported the shelf on BDR cones and pucks at the outside corners and then distributed a 230 pound load of Olympic weight plates over the component sand wells. A dial micrometer device measured just over 1mm of deflection under that load. The in-house engineer at Apex had predicted under 1mm for 180 pounds so he was dead on. Wow at the moment the shelf weighs about 7 pounds! So with the core construction and testing complete, I'm now in hurry-up-and-wait mode for the shelf and three matching isolation slabs to be finished.

I'll update this post with further pictures upon the rack's completion later this Summer.

Happy Trails!
Vince@Freewheelcycle.com

I've just realised I'm not a hi-fi enthusiast at all.

6 little numbers , that's all I need

Great work ! Unfortunately , if I wanted to do same , the most expensive part would be buying the 2nd house to put it in

On a serious note , M should realise the effort that enthusiasts put in to their setups and this is yet another reason to try to keep people informed about upcoming developments / costs wherever possible.

Nice One Vince!

~M~

This is the sort of thing Meridian enthusiasts have been forced to do to entertain themselves whilst waiting for an HDMI solution!

Happy Trails!
Vince@Freewheelcycle.com

I hope you left a space for it on your new rack

Chris

Put me down for one in Taupe

Really nice looking room and rack.

Keep us up to date with progress.

I love your front speakers too

Congrats! I guess I need one of those right about now ...

Ok guys,

This is kinda lame. A full day, seven replies, 250+ views and still not a single additional rack photo. Quid pro quo gentlemen! Show us where your M gear resides...

Happy Trails!
Vince@Freewheelcycle.com

We're all a little embarrassed, but here's mine. It's a Salamander Snergy S20/S40. Top to bottom the components are:

1. 17" widescreen monitor displaying iTunes, and wireless mouse
2. Meridian G68ADV
3. Toshiba HD-XA2 (used exclusively for upscaling DVDs)
4. (reserved for Blu-ray player)
5. Rotel RMB-1066 six channel amplifier (for sides and rears; two channels reserved for hight channels!)
6. Furman RI-1210 balanced power unit (for "front end" components)
7. ThinkPad X24 with 500GB USB hard drive (shelf now occupied with an XP server)
8. DVD tray (holds up to 500 DVDs in Case Logic sleeves)

Hey Frank,

Ya gotta love Salamander's Synergy modular AV furniture. In preparation for our new son's arrival last Fall, we too purchased a Synergy system- a Quad(!)30 rack with locking wire mesh doors for our living room M set-up. The stuff is surprisingly solid when assembled, looks great, and you can pretty much create anything you need with their Lego-style building blocks. The 3/4" thick laminate MDF shelves are pleasingly dead (much more so than the thin shelving of the ubiquitous Target or Sound Org racking) and if you take your time, you can get the individually adjustable shelves dead level with the aid of a carpenter's level and some curse words. Yeah I miss spike-coupled shelving but the rack still manage to not put my delicate audiophile sensibilities too far out of joint.



This 7' long monster comfortably houses a heap 'o gear. There is the living room AV system of 596, 504, 565, 562.3, HD cable box, sat box, Pioneer plasma media box, and an Xbox 360. In addition there is a 541, 557, and 505 which power a 2nd zone Trifield speaker arrangement on our deck. Finally there is 4 media drawers that accommodate about 300 movies (in retail packaging). Believe it or not there is still an empty space or two left. This rack is reminiscent of an open ocean passenger ferry in its ability to swallow gear! BTW- the locking doors have proven to be invaluable. Our toddler is an inquisitive soul!

Though not the cutting edge of audiophilic rack design, I'd still highly recommend Synergy to other North American HitchHikers.

Happy Trails!
Vince@Freewheelcycle.com

My equipment rack is a mess and in a state of complete reworking. I'll get some pics taken if/when I ever get the project done.

Best,