Krell Master Reference Subwoofer - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Closed Thread
 
Thread Tools Search this Thread
Old 9th July 2002, 12:36 PM   #1
diyAudio Member
 
Join Date: May 2002
Location: wheeling illinois
Default Krell Master Reference Subwoofer

Finally had a chance to hear this unit over the weekend.
Very impressed. Price is rediculous of course. ($30Kusd)

I have access to a machine shop, so i could build a diy version
also out of 1 inch aluminum. Which brings me to the drivers.
What would be the best pair of 15 drivers to put in this
sealed box of about 20 x 20 x 30 inch size.

Given the stated frequency response that is about -3db at
10hz, why don't other companies build similar products.

What do you think about using a silicon pressure sensor as
a feedback element making a servo out of the whole thing.
 
Old 9th July 2002, 02:01 PM   #2
Bill F. is offline Bill F.  United States
diyAudio Member
 
Bill F.'s Avatar
 
Join Date: Nov 2001
Location: SW MI
Hello Kevin,

Take a look at this thread for some info about the KMR sub and a naked picture of it: subwoofer design problem

You're not going to achieve -3dB at 10Hz anechoic without equalization, no matter what driver you spec, IMO. I'll bet that's Krell's secret, if they do achieve that spec.

For the money, the Blueprint line seems to dish up the goods. If you don't need drivers right away, you could hold out for the Adire "Uber 15" Dan W. is developing: http://www.hometheaterforum.com/htfo...threadid=50843

Happy thumping,

Bill
 
Old 9th July 2002, 02:56 PM   #3
diyAudio Member
 
Join Date: May 2002
Location: wheeling illinois
Equalization not a problem. Will build whatever i need.
I have a 1 inch B&K capsule mic to measure well into the
10hz region. Power amps not a problem either.

What is the duct tape on the back of the woofer in the
picture for...

Moving it around when i am finsished building it is going
to be the only problem.

Now that i know what drivers they use, the rest should
be easy.
 
Old 9th July 2002, 03:08 PM   #4
Bill F. is offline Bill F.  United States
diyAudio Member
 
Bill F.'s Avatar
 
Join Date: Nov 2001
Location: SW MI
Just curious...

Are you a machinist (with shop) yourself, or are you planning to have this done? The reason I wonder is that I anticipate needing some fabrication done on some transducer prototypes I've been working on. It would be cool to work with a machinist who is also an audio dude.

Bill
 
Old 9th July 2002, 03:47 PM   #5
diyAudio Member
 
Bill Fitzpatrick's Avatar
 
Join Date: Jun 2001
Location: Eugene, OR
Hmmm, another Bill F.

I have a friend who is a machinist and has his own shop. He might be interested. Maybe you could post (preferable) or email (not to big in file size or my mail system will reject it) me a drawing or two so we can see what you have in mind.
 
Old 9th July 2002, 03:55 PM   #6
diyAudio Member
 
Join Date: May 2002
Location: wheeling illinois
I'm an electrical engineer. (among other things)
I also have a vertical mill and a lathe in my
basement. Generally for plastics and woods, machining up
that much aluminum would make way to much of a mess.

I have friends in the machineshop at work, and a few of them
owe me favors. Still i will have to pay for the material which
i estimate at about $800 plus anodizing.

blueprintdrivers.com website no longer exists.
 
Old 9th July 2002, 04:06 PM   #7
Bill F. is offline Bill F.  United States
diyAudio Member
 
Bill F.'s Avatar
 
Join Date: Nov 2001
Location: SW MI
Hello fellow Bill F.,

In my concept quiver I've got a compression driver, an extreme excursion sub-bass driver, and a new-topology dynamic driver, all super-duper top secret .

That is to say, are you in the mood to sign an NDA? If so, I'd be glad to share and hopefully get some feedback from you, too.

Bill
 
Old 9th July 2002, 05:54 PM   #8
diyAudio Member
 
Join Date: Oct 2001
Location: 5280'
Quote:
blueprintdrivers.com website no longer exists.
Actually they certainly do exist the new URL is

http://www.missiondigital.net/
 

Closed Thread


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
My Dayton Reference 12" Subwoofer owdi Subwoofers 25 2nd June 2011 08:49 PM
Reference Sound - Reference IC's? amirmk Solid State 0 26th July 2005 07:49 PM
Krell Master Reference Schematics (in here!) ShinOBIWAN Solid State 5 1st April 2005 11:39 PM
Any website reference for diy Audio Research REFERENCE amp and Manley Studio amp bmpa Tubes / Valves 4 19th April 2004 05:11 AM
Oh Master, my Master... Stefano Pass Labs 6 6th February 2004 01:41 PM


New To Site? Need Help?

All times are GMT. The time now is 04:56 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2