How to sound proof a pair of s-7 miners.

[generalt]

Nice work Phil.  I'd love to see the two S7's on one controller at 600 freq 

[philipma1957]

Phil, what was the dB reading before the muffler?  I didn't see it listed in the thread.

stock speed 600
each muffler drops it 4db  so 65 or 66db for 1 s-7 and it whines fan at about 35-38%  

 then 61-62  1 muffler

then 57-58 2 mufflers      with stock freq and  fan at 35%

it is warm in NJ  77f today  if it were colder  fan could go to 32%

all numbers above are at ⅔ meter



I am now running 2 pieces and the room is too warm since the night air is warm.

A two piece design needs to be diff.  if you attach the machines   the muffler will need to have a different adapter to accommodate the fans

[philipma1957]

Nice work Phil.  I'd love to see the two S7's on one controller at 600 freq 

need more muffler

found this at home depot


http://www.homedepot.com/p/Thermaflex-EverClean-7-in-x-25-ft-HVAC-Ducting-R8-0519-0700-0003/203767737

if this is better it is much cheaper

[generalt]

I am now running 2 pieces and the room is too warm since the night air is warm.

A two piece design needs to be diff.  if you attach the machines   the muffler will need to have a different adapter to accommodate the fans

I think you need to vent them out a window or something.

[philipma1957]

Wow I was dead lucky with that setup just plugged them in with no real thought and they worked.

Thank you. Now working .

@ Tupsu

here is a shot of my controller loaded for 6 boards.  so:

 1)full
2) full
 3) full
4)full
5) blank
6)full
7) blank
8 )full
9) blank


Click to enlarge

You guys run 2 S7 on 1 Controller ? Why ?

saves power and if it dies you have a backup.

[Hippie Tech]

geez.. that is one freakishly loud miner.. heh.

https://youtu.be/5UFGEXyduSA

Have you tried reseating the heatsinks ?

Are the chips sitting flush with said heatsinks ?

Have you considered lapping everything and/or adding a copper slab or shims to the heatsink ?

[alh]

geez.. that is one freakishly loud miner.. heh.

https://youtu.be/5UFGEXyduSA

Have you tried reseating the heatsinks ?

Are the chips sitting flush with said heatsinks ?

Have you considered lapping everything and/or adding a copper slab or shims to the heatsink ?

Why all the interest in the heatsinks? As I have seen the pictures, there is a small heatsink  :)onto each chip. They aren't screwed down in any way. There is nothing to lap. It's completely unlike a CPU heatsink in terms of it's attachment.

It's a 1200W box that's got to get rid of it's heat, and it does so with high static pressure, high CFM, loud fans.

[philipma1957]

geez.. that is one freakishly loud miner.. heh.

https://youtu.be/5UFGEXyduSA

Have you tried reseating the heatsinks ?

Are the chips sitting flush with said heatsinks ?

Have you considered lapping everything and/or adding a copper slab or shims to the heatsink ?

Why all the interest in the heatsinks? As I have seen the pictures, there is a small heatsink  :)onto each chip. They aren't screwed down in any way. There is nothing to lap. It's completely unlike a CPU heatsink in terms of it's attachment.

It's a 1200W box that's got to get rid of it's heat, and it does so with high static pressure, high CFM, loud fans.

yeah and the only way to keep temps down it to let the fans do their job.  So if you are not restricting airflow the best shot you have is a muffler system.

Now the 25 foot piece of duct work I ordered from Home Depot was 97 bucks.  If it works well it is lower cost then the mufflers and it will allow me to send the hot air out the window.  am looking forward to its arrival.

[Tupsu]

You guys run 2 S7 on 1 Controller ? Why ?

If you have to ask why, this is not for you.

I want to use the S7 controller for 8 x S5 blade.
It is 1 x water cooled S5  4,3 TH/s.  Winter is coming.

[valkir]

loll Tupsu

Yeah sure its not for me.

[philipma1957]

finally got my two set up in the garage.

hands down the best solution is this.  you can make at least 6 mufflers which does 3 s-7's

can not get this to show

https://i.imgur.com/88djusZ.png



one muffler



two on exhaust

[philipma1957]

two on intake





for the center I have an old audio rack


http://www.mcmelectronics.com/product/555-17805?green=11116641562




my two car garage is now a 1 car.  but it has been used as a one car garage with storage for years.

[philipma1957]

  results are it is quiet.

 at 60%  fan which is more than 4000 rpm

freq 575

 I am well under 55db


cost was 100 for the duct

  I can make 4 more

 I made 4

A wooden case the audio rack was  free but you could build  a rectangle open ended box  for 10 bucks

and some duct tape 10 more grand total of 120.

to be fair I added some moving blankets and a pair of long sheets of mdf but they don't take a lot of extra sound off.

I will break the  sound meter out in a bit.

[torepia]

Nice work! Are the miners inside the ducts/vents? Or are you using them just for intake/outtake?

[philipma1957]

Nice work! Are the miners inside the ducts/vents? Or are you using them just for intake/outtake?

duct----miner----duct
duct----miner----duct
                ^
                ^
------ audio rack------


 has the miners and the psu's


you could do

duct-- miner-- duct

and get good noise drop.

you could do

duct--------- tube with miner ----- duct

tube is four feet cut in 2

so 3 foot duct------- 2 foot tube (  miner inside) ---  3 foot duct.

7 feet long since some of the duct is inside the cardboard tube

I am piggybacking the controller in my setup so I used the audio rack I linked. since my miners are close together.

I may switch to the tube idea and use 2 controllers

[Mikestang]

Phil, did you consider cutting out a vent hole low in the wall between garage doors and ducting the exhaust outside?  You could put a nice vent cover over the outside and it wouldn't look like anything out of the ordinary, and then all the heat and much of the exhaust noise would be directed outside.

[citronick]

is it wise to install another fan at the other end of the duct/muffler to get as much heat out as possible?

[OgNasty]

Perhaps a cheaper alternative?

http://www.amazon.com/Lamborn-Poly-Jacket-Insulated-R-4-2/dp/B00A8P3QBM/ref=sr_1_2?ie=UTF8&qid=1446227384&sr=8-2&keywords=7+inch+insulated+duct

[philipma1957]

Perhaps a cheaper alternative?

http://www.amazon.com/Lamborn-Poly-Jacket-Insulated-R-4-2/dp/B00A8P3QBM/ref=sr_1_2?ie=UTF8&qid=1446227384&sr=8-2&keywords=7+inch+insulated+duct

it is r4 vs r8   that is the heat insulating factor  but  I suspect it will be a sound factor also.



I am going to have left over material I could build some and ship them out I need to see how much it will pack down.

is it wise to install another fan at the other end of the duct/muffler to get as much heat out as possible?

if you make the duct really long yes it may need a helping fan.  my ducts are short and I get very good exit pressure.

Phil, did you consider cutting out a vent hole low in the wall between garage doors and ducting the exhaust outside?  You could put a nice vent cover over the outside and it wouldn't look like anything out of the ordinary, and then all the heat and much of the exhaust noise would be directed outside.

the wall between the garage doors is a support beam.  No can do

it is 2400 watts more or less once we get below 50f the heat will be a non-issue.

as for sound  it is under 55db at exit point with the fans at 4100 rpm

In the summer I would need to vent, but my power jumps from 10 cents to 17 cents so I can't summer mine.

[OgNasty]

I have 6" non-insulated ducting to exhaust the heat and I'm surprised at the noise reduction.  That alone makes a 100% fan quieter than a 65% fan without it. Have you tried a shorter length, like say 10" over the exhaust fan only? I am wondering if that would be enough to make a noticeable difference.