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migasson

Denon DP2000 plinth options...

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Hey!

 

Ok, so I've obtained one of these:) (The pic is the model, not the actual table!)

 

So, this will turn into a long term project, so I'm no rush to build this up:) Mine will come with the motor unit, and the Denon plinth- and I get to choose my tonearm:) Where will this go? Well, I think I'm gonna grab a Jelco 750D, (or unless a SUPER cheap SME comes up here;)) and just bolt it up. But the reason for the post is I may just be tempted to build a custom plinth.

 

I wanna know if anyone here has built a custom plinth for this motor unit specifically, and what materials worked best..

 

I'm thinking:-

 

Layered birch ply

Super thick MDF (mulitiple layers)

Corian

HDF

 

Thoughts?

 

 

 

 

post-120746-0-92833600-1434282068_thumb.

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Ironically enough, over the last week I've been looking into doing the exact same thing with a Denon DP80 motor unit.

 

From what I've read on the matter at the Vinyl Engine forum, and the DIY Audio forum, apparently going for a ultra heavy high mass plinth made of a single type of material is not recommended.

Corian was one of the first materials to be warned off, according to those who have tried it, the bass can sound slow and plodding, deep but no definition....the Jelco arm is ultimately supposed to have the same attributes, so mating those to would be a pretty disastrous result.

 

Thick, multiple layers of MDF weren't given a much better rating [pity as it's much easier to cut / shape], reasoning for the disappointing resulting sound with this sort of construction was that it basically ends up, like the Corian, one large mass that doesn't do the bass frequencies in the best way.

 

Using layers of Birch ply got a better rating, but apparently best sound is gotten by constructing the plinth by layering the grain of the ply one way, then the next layer the other way, etc.

It was also recommended to use different Ply's of the Birch ply in the one build, as this breaks things up even more.

I suppose if you could get a hard plastic coating put over the whole thing, it would sort of be like a mega Rega TT.

 

If you look at Denon's top of the line DK-300 Panzerholtz ply plinth, you will see it is constructed in a similar cross layering construction.

post-103973-0-85920900-1434444058_thumb.

 

I looked into sourcing Panzerholtz ply [bullet proof plywood] - forget it, it costs a fortune and is a total PITA to shape without very expensive tooling.

 

 

Then, when doing further research I hit a blog that got into the high end build for Technics SP10's etc.

I'll just give you the links to that as it better describes the process , similar to above - different material - more like multilayer ply, with a Aluminium layer and a Basswood layer [basswod is very light,used to build Electric Guitars ]

http://www.soundfountain.com/amb/sp10plinth.html

 

So I'm still in research mode ATM, early days as I'm in no hurry to build till I know exactly what will suit me best.

 

By the way, I think most of the Denon motor units use pretty much the same cutout for the plinths.

You can download the template from the Vinyl Engine under the DP80 model [not sure if you need to be a member to get it - I am]

http://www.vinylengine.com/library/denon/dp-80.shtml

Edited by Tweaky

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It sounds like we're heading for a build-off @@Tweaky !

Good chunk of info. I've been looking for that magic bullet.. "..use this and this= great sound" but it looks like trial an error will bring results. I'm heading down that ply route, but I did see one thing. This geezer built a solid maple base, and topped it with 3/4 inch slate.. However what I'm trying to do is do most of it at home, kinda get involved with it.

Cheers, didn't know the DP-80 had the same mounting template. I've downloaded it, and will compare when my Denon arrives.. P

In the meantime, looking out for a tonearm. Some of the older Graces are tempting...

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Maple is very a very hard wood, also very dense, subsequently heavy per Cub cm.

Not exactly cheap building material either, even if sourcing the Queensland maple variant.

 

That Geezer might of built a brick, that could have easily have been built out of MDF considering the materials used.

 

Using a heavy dense top of slate might of made the sound slightly different, but I wouldn't go down that High Mass route..... seems like a Corian base result, without using Corian IMHO

 

What we both need to achieve in plinth design for this project is, rigidity over mass, inertness over weight.

 

Rega found a cheap solution to updating the P3...that was a small hard brace that ran along the top of the turntable to give it rigidity...it worked.

 

We, Thankfully, are not intending to build a TT to a budget, nor to one that needs to fall into a specific weight constraint for shipping purposes.

Thus, we can go full steam ahead and use better materials.

 

My thoughts ATM are to use multiple layers of birch ply, then use 0.5mm Brass sheet bolted both as a Top and a bottom of these ply's, to compress together.

Face the sides with similar Brass sheet.

This will give the stiffness requires, without undue mass, at a acceptable cost, and with great latitude as to finish.[i've got this book at home on how to patina various metals ;) ]

 

http://www.amazon.com/The-Colouring-Bronzing-Patination-Metals/dp/0823007626

 

EDIT: Just re reading your last post again....don't take the plans for the DP80 as gospel "Suitable" for your TT motor, they could be different mounting holes.

Suggest going  to the Vinyl Engine and asking owners of your motor unit.

Edited by Tweaky

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Maybe Duc (Lovetube) can build you one?

It deserves a great plinth. :)

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Out of what?

Something special?

 

Please be more specific.

 

I've been a forum member here since year dot, can you link me to any previous posts that relate to the subject we are talking about, OR to LoveTubes expertise ,I'm not familiar with it.

Cheers. :)

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Looks like birch ply is the go!

I was thinking of cross running the grain. What I'll do is build it up in layers as I go, till I achieve the sound I want- so kick off with, say, 4 layers, 24mm thick, (or 6 x 12mm) and take it from there- with the top layer having an interchangeable armboard. Then, if I need to, brace the top and bottom....

Have my spbreak coming... I'll start soon and post the result:)

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Looks like birch ply is the go!

I was thinking of cross running the grain. What I'll do is build it up in layers as I go, till I achieve the sound I want- so kick off with, say, 4 layers, 24mm thick, (or 6 x 12mm) and take it from there- with the top layer having an interchangeable armboard. Then, if I need to, brace the top and bottom....

Have my spbreak coming... I'll start soon and post the result:)

 

go for it.

Russian Birch is my first choice for plinth build unless you want to solid hardwood .

4 layer of 24mm birch is good start and i think that all you need .

have funs.

Duc

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Out of what?

Something special?

Please be more specific.

I've been a forum member here since year dot, can you link me to any previous posts that relate to the subject we are talking about, OR to LoveTubes expertise ,I'm not familiar with it.

Cheers. :)

My mistake was not quoting or addressing the OP.

Don't give a damn either how long you have been a member, what's that all about?

In fact I have been here longer. But so what?

To the OP..... I realize you did state that you might build your own plinth, I just wanted to give an alternate option.

Edited by soundfan

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Oh for Christ's sake.

 

Ok , you didn't specify who you were replying to

I wasn't having a go, or stating some missed perceived, by you, higher ground, based on how long I, or you for that matter, have been posting here....you totally missed read my question, and the point of the question.

 

All I wanted to know was what LoveTube had posted, and what interest it would have, to this thread.

The first I've heard of LoveTube was your posting in this thread ....Hence my original, quite civil and proper question to you about it.

 

You only mentioned his name, no links given to any relevant threads or posts by him, or about him concerning this project, or how and what he could contribute to it.

 

Of your 7000+ posts, how many have been so uninformative?

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go for it.

Russian Birch is my first choice for plinth build unless you want to solid hardwood .

4 layer of 24mm birch is good start and i think that all you need .

have funs.

Duc

 

What are the specifics of "Russian Birch" construction ?

Who, in Aus deals in Russian Birch Ply?

What are the properties of this ply that makes it preferable for TT building?

 

Do you have to dance like Bear standing on hot coals to get a sheet of primo Russian ply ;)

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@@Tweaky..

I did an Internet search on Russian birch ply suppliers in Melbourne, and about five popped up- coincidently, one around the corner from me!!! I reckon if you do the same, you'll find plenty in Sydney. I don't know the reasons why it seems to be better, but for the relative low expense versus other materials, it's worth the punt to see if it works. I can can a sheet cut up, 12mm thick, so I'll end up with four sheets of 600 x 450 mm, 12mm thick for $150.

Lovetube gives it the thumbs up, and he builds plinths, so it's an encouraging approval:) im building it over the next few weeks, I'll post the results

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What are the specifics of "Russian Birch" construction ?

Who, in Aus deals in Russian Birch Ply?

What are the properties of this ply that makes it preferable for TT building?

 

Do you have to dance like Bear standing on hot coals to get a sheet of primo Russian ply ;)

 

Hi Tweaky.

Plyco in Melbourne supply them .you can go to they website for more info .

why do i choose or why is it good material to built turntable plinth ?  it is heavy , it is not too dead , it is not too damp but not too live either and that is a what make it a good choice for plinth .

there is plenty of infos in the web about this material . so take sometime to read and you will know more.

Duc

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