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Lilmike's Cinema F-20 - Page 11

post #301 of 1695
Sold!! I need to save some money right now and the F-20 fits the bill, I hope they can keep up!
post #302 of 1695
Quote:
Originally Posted by vitod View Post

Gone.

OK, I understand that. I'm curious to see what they do in your room.
post #303 of 1695
Quote:
Originally Posted by louisdamani View Post

Is it classified information? MK has had awesome set-ups so, I just wondered was it a technical reason or just time for a new awesome set up.?!

I don't think 122 db's at 10hz was bad!!! I need to downgrade I just hope not too much in performance.
post #304 of 1695
Quote:
Originally Posted by MKtheater View Post

I don't think 122 db's at 10hz was bad!!! I need to downgrade I just hope not too much in performance.

Are you using MFW drivers?
post #305 of 1695
Yes
post #306 of 1695
Thread Starter 
Quote:
Originally Posted by blackoper View Post

What version of minidsp plugin do I need for this anyway? I'm thinking two way advanced. I'm going to have two F-20s and then maybe later adding a Clark Synthesis Platinum Transducer or two to a platform

2 Way Advanced is what I use with subs currently, there are rumors of a sub-specific plugin on the way though.
post #307 of 1695
thanks for the info on the minidsp plugin. Now just to get everything in and build the f-20s. Only other thing I may need after testing everything is a bump box for the rca sub output.
post #308 of 1695
Quote:
Originally Posted by blackoper View Post

thanks for the info on the minidsp plugin. Now just to get everything in and build the f-20s. Only other thing I may need after testing everything is a bump box for the rca sub output.

If you can find a good one let me know!!! I just decided to jump for the balanced MiniDSP instead. Give me a PM if you have any specific questions about it as Ive basically spent my free time over the last several days researching the different options.
post #309 of 1695
Nice MK. I look forward to seeing your impressions of the F20's. What are you looking at for the build when all in? 4 mfw's, wood and a single ep4000 sounds like a lot of bang for the buck. What is that < $1k?
post #310 of 1695
There is a good conversation happenin over in the dts-10 thread regarding corner-loading vs. mouth firing towards seating position if anyone is interested in some extra reading I imagine similar results would happen with doing the same with the f-20.
post #311 of 1695
Quote:
Originally Posted by Ricci View Post

Nice MK. I look forward to seeing your impressions of the F20's. What are you looking at for the build when all in? 4 mfw's, wood and a single ep4000 sounds like a lot of bang for the buck. What is that < $1k?

That is about right but add $300 for my 5 channel multichannel amp that I will use to power these(450 watts per channel). One channel per sub and the extra channel will power the center.
post #312 of 1695
Quote:
Originally Posted by MKtheater View Post

That is about right but add $300 for my 5 channel multichannel amp that I will use to power these(450 watts per channel). One channel per sub and the extra channel will power the center.

where do you find a $300 5 channel 450 wpc amp?
post #313 of 1695
Quote:
Originally Posted by beastaudio View Post


where do you find a $300 5 channel 450 wpc amp?

+1

I wanna know too. :-)
post #314 of 1695
I was adding $300 to a behringer that Ricci included in his price estimate. It was $700 so more like $400 more but still a steal. It is an Ada MPA-500 and MPS-500.
post #315 of 1695
the Crown 402D amp arrived today and it looks really nice. I'm going to have to run a new power outlet for the amp though as I needed one any way. I'll be starting building the f-20s tomorrow hopefully. We will see if I can get them done by sunday night.
Also I have no idea how to setup the minidsp for dual F-20 subs. I may have to spend some time reading unless someone can point me in the right direction.
As far as REW, I do have the parts to make Lilmike's microphone on the way from digikey and will get a SPL meter from radioshack.

Edit: used wrong word was confusing
post #316 of 1695
Awesome design. Has anyone compared the efficiency of this, or max output to the original ported MFW design?
post #317 of 1695
Quote:
Originally Posted by BiGBADDABOOM View Post

Awesome design. Has anyone compared the efficiency of this, or max output to the original ported MFW design?

Uh, its lower and louder than the ported design
post #318 of 1695
Thread Starter 
Quote:
Originally Posted by BiGBADDABOOM View Post

Awesome design. Has anyone compared the efficiency of this, or max output to the original ported MFW design?

Covered that here.

6 dB is considerable, it is essentially the same as adding another ported cabinet and amp. I have posted a lot of data about this sub. I don't have an original MFW-15 to test.
post #319 of 1695
Quote:
Originally Posted by stgdz View Post

Uh, its lower and louder than the ported design

I was looking for something more specific- I was wondering what the gains were of this design over Seaton's original. I don't think one is lower than the other though (to a significant extent), the ported unit was tuned somewhere around 18-19Hz I believe.

Quote:
Originally Posted by lilmike View Post

Covered that here.

6 dB is considerable, it is essentially the same as adding another ported cabinet and amp. I have posted a lot of data about this sub. I don't have an original MFW-15 to test.

Indeed it is, thanks. That's exactly what I was wondering. Great work and contribution!
post #320 of 1695
I ordered a mini dsp yesterday and will be putting in a PE order for the Speakons, speaker caulk, and wire today. Am I forgetting anything that could be useful for the build from PE? Notnyt's going to be helping me so tools won't be an issue
post #321 of 1695
Quote:
Originally Posted by kibe29 View Post

I ordered a mini dsp yesterday and will be putting in a PE order for the Speakons, speaker caulk, and wire today. Am I forgetting anything that could be useful for the build from PE? Notnyt's going to be helping me so tools won't be an issue

Sounds like your on the right track

Also, since you'll have help from someone who has previously built THT's, I am positive he will laugh and say at some point that this build is insanely simple.
post #322 of 1695
Thread Starter 
Quote:
Originally Posted by kibe29 View Post

I ordered a mini dsp yesterday and will be putting in a PE order for the Speakons, speaker caulk, and wire today. Am I forgetting anything that could be useful for the build from PE? Notnyt's going to be helping me so tools won't be an issue

Maybe the Hurricane nuts?

There is a complete parts list at the front of the instructions. I think you should be able to source the rest locally.
post #323 of 1695
well home for dinner. Didn't get started cutting birch plywood until 3:30ish. Got everything cut and laid out. I'll see how much I can get done but it looks like I'll have to come back next weekend to finish everything.
Having a panel saw and a large table saw seemed to hurry things along

8pm - everything is laid out on both and the access panel is ready to be cut. Done for the week. I'll head back next weekend to finish them up. I'm thinking about painting the two f-20s a mahogany color
post #324 of 1695
Quote:
Originally Posted by blackoper View Post

the Crown 402D amp arrived today and it looks really nice. I'm going to have to run a new power outlet for the amp though as I needed one any way. I'll be starting building the f-20s tomorrow hopefully. We will see if I can get them done by sunday night.

yep, with the xls2000 running through my power conditioner, it kept kicking it. Im having a new circuit run hopefully sometime this week as well.

I got the second f-20 cut and laid out this weekend as well, cut the access panel right this time, and should hopefully be able to get it together this week.

a quick question, does anyone know if the cutout diameter of the MFW is the same as the tempest, and if the mounting holes can/will match up properly? Im hoping that is the case!

Cant wait to hear two of these in action. once the speaker got good and broken in on the first, it really came alive!!

my initial plan is to have the tempest running in the f-20 up front, then the one I have now, in the rear of the theater dialed down just a shade (since it will still be getting double the rated power necessary for the MFW) will there be any problems with doing it this way? Im am also wondering how you EQ dual enclosures in different areas of the room correctly with the MINI?
post #325 of 1695
Been reading the best $500 sub thread and the intense discussion thereabouts. It brought one question to mind however, since this build is not technically a horn design, it is a sealed enclosure with a large transmission line? how does one really compare it to any other type enclosure to begin with? i.e., do we get the benefits of a sealed enclosure, with the benefits of a horn or ported as well?
post #326 of 1695
I wonder with a more robust driver they could EQ the lower end since the driver is sealed. Not that is a smart thing to do in a Font loaded horn anyways.
post #327 of 1695
you mean below the 20 hz tune?
post #328 of 1695
Quote:
Originally Posted by beastaudio View Post

you mean below the 20 hz tune?

Yes, Even though the current model is design for 20Hz. I wonder what happens if we boost below 20Hz. The driver is in a sealed enclosure so its excursion is lmited by that volume.
post #329 of 1695
Quote:
Originally Posted by penngray View Post

Yes, Even though the current model is design for 20Hz. I wonder what happens if we boost below 20Hz. The driver is in a sealed enclosure so its excursion is lmited by that volume.

Ill be interested to see what mike says about this, I imagine that it may cause issues further up the FR band but who knows, throw a HP at 15 instead of 20 with the intent to get a little better lowend and see what the graph shows! How big a difference is there in reality between 20 and 15 to begin with?
post #330 of 1695
Im building some mid bass horns (Front loaded idea also). I will be trying the EQing idea after I have them built.

The F20 is very, very impressive (I would like to see what Kevin offers with his new driver). If you think from the other discussion that Im against horns, I just have to comment that Im not but we need to understand any compromises that come with them.
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