Lenco L70 plinth rebuild

hacknet · 20th January 2007, 02:46 PM

after 2 years of feet dragging, i finally finished my plinth for my lenco L70.

its a mdf and ply sandwich. 6 layers of 18mm mdf and 6 layers of 3mm ply. inbetween the bottom most layer, i used 3M double sided sponge tape instead of the ply.

the plinth orignally sounded very lean in the midbass. a rubber and steel washer combo to place between the 2nd and 3rd layers helped to fatten up mid bass. placing this spacer too far up made the mid bass sound too fat, too far down and it sounded too lean. spent an afternoon tweaking and i found that placing it inbetween the 2nd and 3rd yield the best balance

i am thinking of taking it down from the rack and placeing it on an ikea lack table.. any suggestions?

Floric · 20th January 2007, 07:36 PM

Very interesting,

I prefer Plywood over MDF for plinths, MDF dampens too much, I think.

What tonearm are you using there?

Regards

Floric

hacknet · 21st January 2007, 03:40 AM

yeah, i totally agree with you!

im using a unipivot made out of aluminium u channel, very much like the altman concept.

im thinking of ways i can improve the plinth.. me thinks it needs a new rack.

owen · 21st January 2007, 09:49 AM

Arrrgggghhh.. I hate 'teaser' shots...

More Pictures! More Pictures!, More Pictures! (especially of that arm

)

Congratz that you've finally got to the point of being able to listen, and from here the journey begins 8)

Owen

Floric · 21st January 2007, 11:47 AM

My plinth is made of three layers of birch plywood and two layers of beech plywood that are glued to each other. This provides a little damping because of the different materials in the layered structure and it provides a lot of mass. Sounds quite good.

It is important to glue the layers together.

For more questions, I would refere to the lenco-lovers forum

Regards

hacknet · 21st January 2007, 02:13 PM

from the top

hacknet · 21st January 2007, 02:14 PM

side view

hacknet · 21st January 2007, 02:17 PM

im having alittle trouble with the counter weight. i need to make a circular weight with a threaded hole in the middle so i can adjust the vtf without loosening the screw..

i'm thinking of a ply plinth next.

got myself a lack today and i am not very impressed. not exactly a fanastic table for the lenco.

20th January 2007, 02:46 PM	#1
hacknet diyAudio Member Join Date: Nov 2002 Location: sg	Lenco L70 plinth rebuild after 2 years of feet dragging, i finally finished my plinth for my lenco L70. its a mdf and ply sandwich. 6 layers of 18mm mdf and 6 layers of 3mm ply. inbetween the bottom most layer, i used 3M double sided sponge tape instead of the ply. the plinth orignally sounded very lean in the midbass. a rubber and steel washer combo to place between the 2nd and 3rd layers helped to fatten up mid bass. placing this spacer too far up made the mid bass sound too fat, too far down and it sounded too lean. spent an afternoon tweaking and i found that placing it inbetween the 2nd and 3rd yield the best balance i am thinking of taking it down from the rack and placeing it on an ikea lack table.. any suggestions?

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20th January 2007, 07:36 PM	#2
Floric diyAudio Member Join Date: Jan 2005 Location: Bavaria	Very interesting, I prefer Plywood over MDF for plinths, MDF dampens too much, I think. What tonearm are you using there? Regards Floric

21st January 2007, 03:40 AM	#3
hacknet diyAudio Member Join Date: Nov 2002 Location: sg	yeah, i totally agree with you! im using a unipivot made out of aluminium u channel, very much like the altman concept. im thinking of ways i can improve the plinth.. me thinks it needs a new rack.

21st January 2007, 09:49 AM	#4
owen diyAudio Member Join Date: Mar 2004 Location: Shilton	Arrrgggghhh.. I hate 'teaser' shots... More Pictures! More Pictures!, More Pictures! (especially of that arm ) Congratz that you've finally got to the point of being able to listen, and from here the journey begins 8) Owen

21st January 2007, 11:47 AM	#5
Floric diyAudio Member Join Date: Jan 2005 Location: Bavaria	My plinth is made of three layers of birch plywood and two layers of beech plywood that are glued to each other. This provides a little damping because of the different materials in the layered structure and it provides a lot of mass. Sounds quite good. It is important to glue the layers together. For more questions, I would refere to the lenco-lovers forum Regards

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