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Ricci's CKRAM Subwoofer and Files


Ricci

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  • 10 months later...

Hi all I am looking at a DIY FOH build. For the top boxes looking at the Peter Morris PM90 and was wondering if this sub in two per side would be a good match. I plan to bite the bullet and spend once so the Eminence NSW6021-6 will be the driver. On that what would be ideal power amps to run the show

Chris

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8 hours ago, Chris said:

Hi all I am looking at a DIY FOH build. For the top boxes looking at the Peter Morris PM90 and was wondering if this sub in two per side would be a good match. I plan to bite the bullet and spend once so the Eminence NSW6021-6 will be the driver. On that what would be ideal power amps to run the show

Chris

https://www.avsforum.com/threads/diy-mid-hi-bms-coax-2x-12-b-c.3006048/

Almost the same setup, I think @dsl1 was very happy with it  ;)

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On 7/7/2021 at 11:38 PM, Chris said:

Hi all I am looking at a DIY FOH build. For the top boxes looking at the Peter Morris PM90 and was wondering if this sub in two per side would be a good match. I plan to bite the bullet and spend once so the Eminence NSW6021-6 will be the driver. On that what would be ideal power amps to run the show

Chris

4 of these and a pair of PM90's should be quite a good sounding setup and compact for the performance available. I've not personally heard the PM90's but I've looked at the design and talked with guys who have built and heard them. The feedback and measurements are positive. 

Amplification will depend on budget, channel needs and available mains supply. You've got everything from Behringer at the cheap end on up through something like a PS X8. Would the PM90,s be active?

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  • 4 weeks later...

You can use it as a vented cab without the front panel. It is designed to be used either way. If you read the initial (LONG) posts I made it goes into some detail about what the front panel "should" do. I never had a chance to fully GP test this cab design yet. 

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  • 1 month later...
  • 1 month later...

First post on this forum, hi Guys! Really like all the content here and wish I would find it sooner.
Looks like a pair of Ckrams is my next dream build. Big thanks for the design and detailed information! Frankly would prefer to build Scrams instead but the size and weight scares me (me and my spine, to be precise), don't think I can handle it. The biggest sub I built so far is vented B&C 18DS115-8 and so it's very interesting for me to see how a couple of NSW21 in Ckram cabs will sound. I will do some measurements after I'm done and will post here.

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  • 2 weeks later...
  • 7 months later...

Hi Guys

Has been awhile. Due to the AUD exchange rate and shipping the NSW21 and most other are bit pricey!!

Have any of you modelled the SB Audience Nero? (see attach below) and would they be ok in this cabinet?

Still looking at two per side and running a Powersoft K10

Also I was going to look at the PM90 but have just picked up a pair of EAW394 powered version in mint condition. Crossover select 80 or 110. So would the CKRAM be smooth up to 110?

TIA Chris

https://www.sbaudience.com/index.php/products/subwoofers/nero-21sw1100d/

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Hey Chris. The Nero will make some noise but it has lower xmax, power handling and less motor force. It probably wants a bit more cabinet volume. Hard to say with out trying it though. The Mms is light too indicating a cone that may flex at war volume. 

CKram should be useful up to 120Hz giver or take. 

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  • 1 month later...
  • 2 weeks later...

Isobaric doesn't really give much extra output. You are still limited by the xmax of 1 driver. it was a way to get extra motor force and a smaller cab back in the day. The modern 21's don't lack for motor force. It's a huge money sink for not much gain. The CKRAM is already small for a single 21. 

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  • 1 month later...
  • 2 months later...
  • 3 months later...

Hello,

 

New to the forum, impressive stuf !! searching the different forums for a compact somewhat light enclosure with max output for a sound system operated outside and bike mounted (Dutch people.....). Am i correct in concidering the ckram for this purpose, or can more knowledgable people on this forum direct me in the right way. Also, are the plans for the ckram yet available in any cnc or cnc transferable format?

Afbeelding van WhatsApp op 2023-05-18 om 14.20.13.jpg

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  • 6 months later...

Using economy style plywood and some scraps for the 12mm parts i started construction here are some pictures of the process.

First off thank you Josh the drawings are flawless!

Sadly upon reaching this point my work shift starts again so will continue with the circular bit once i get back home. sofar everything is up to the millimeter exactly as drawn.

Upon completion i would like to submit measurements. I think i have everything (software, calib. mic., mic, stand etc) Could anyone point me in the right directions on a step by step measurement process?

I know theres a big chance this thread is dead, no one will be reading this but im trying anyway and like to thank Josh again for the nice drawings.

 

Greetings Lex Breijs.

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