Re: The Minuet5 in development.

Clearwave · Clearwave on Thu Jan 29, 2009 9:01 am

Interesting, when you were speaking about the port, I just assumed you were talking about noise. I'll give options for 2" flared and 2.5" one side flared. That way the end user can decide whether they can hear the compression at ear piercing levels or whether it's a factor for his/her listening levels. The Precision Ports do a nice job as do the Dayton flared ports. I'd imagine compression would be more of an issue with subwoofers than a monitor, but that's just a guess.

Precision Port 2" flared on both ends (will not fit curved PE cabinet) 5" total length including flares. F3 47hz
Dayton 2.5" port with one press fit flare (will fit curved MTM PE cabinet) 8" total length. F3 47hz

Bear · Bear on Thu Jan 29, 2009 1:08 pm

There was a fairly detailed discussion of laminar flow, boundary layer turbulence, etc., on one of the other audio forums, but my search skills are failing me now. The testing behind Flare-It, while not authoritative, is probably fairly reasonable/reliable. In other words, if it says you don't have a problem, you probably don't, though I'm not sure I'd trust it for cases at the margin one way or another.

http://www.subwoofer-builder.com/flare-testing.htm

That being said, for some port models, you just can't hit mach 0.5 and NOT have some aerodynamic issues of some sort when dealing with a 2" pipe...

Clearwave · Clearwave on Fri Jan 30, 2009 10:36 am

Well, I posted up all the info for the Minuet5 on my website. The crossovers are a bit pricey because of the high quality parts that are used. But, IMO this may be the last monitor you'll ever need to own. They are that good. Every time I listen to the Air Circ I'm just blown away by it's top end and perfect clarity. The power response on these is VERY flat and you can't even detect a crossover point. So SMOOOOTH. Anyways, if you have questions about the design post here.

Bear · Bear on Fri Jan 30, 2009 11:58 am

Clearwave wrote:Well, I posted up all the info for the Minuet5 on my website. The crossovers are a bit pricey because of the high quality parts that are used. But, IMO this may be the last monitor you'll ever need to own. They are that good. Every time I listen to the Air Circ I'm just blown away by it's top end and perfect clarity. The power response on these is VERY flat and you can't even detect a crossover point. So SMOOOOTH. Anyways, if you have questions about the design post here.

Jed - I'm always curious to see full-range FR, rather than truncated, even for a monitor like this. Any chance to see the full sweep?

Bill

Clearwave · Clearwave on Fri Jan 30, 2009 12:27 pm

Bear wrote:
Clearwave wrote:Well, I posted up all the info for the Minuet5 on my website. The crossovers are a bit pricey because of the high quality parts that are used. But, IMO this may be the last monitor you'll ever need to own. They are that good. Every time I listen to the Air Circ I'm just blown away by it's top end and perfect clarity. The power response on these is VERY flat and you can't even detect a crossover point. So SMOOOOTH. Anyways, if you have questions about the design post here.

Jed - I'm always curious to see full-range FR, rather than truncated, even for a monitor like this. Any chance to see the full sweep?

Bill

The measurements are unsmoothed. If I posted the unsmoothed response down to 40hz people might not understand that if you open the gate of the measurements to say 180ms, all kinds of room effects creep into the measurements below 600hz. Most manufacturers show down to 200hz, then a nearfield plot with spliced data for the port. I took a nearfield measurement of the port and impedance sweep to make sure it is functioning correctly rather than relying on farfield full gate measurements on axis. Your best bet to really know what is going on, is to model the response below 100hz in unibox. My other speakers I've posted full gate measurements, and you can see it gets kinda rough below 300hz with the in room responses. Still, those don't have port data spliced in. My room will be nothing like yours so the response below 100hz in my room is irrelevant to the final "real" response. I've posted a lot about how I go about measuring loudspeakers over at htguide.com. At some point I'll have to go over there and dig up some of my posts and put it on the website.

drab · drab on Fri Jan 30, 2009 1:41 pm

Hi Jed,

How about measurements at 15 and 30 degrees off axis? Embarassed

Zero the Hero · Zero the Hero on Fri Jan 30, 2009 9:07 pm

Yeah, i dont bother looking for anything under 200hz in posted measurements, but I'd also like to see off axis....

Clearwave · Clearwave on Sat Jan 31, 2009 12:47 pm

I'll take more measurements this weekend and save the responses for you all. The speakers are in the listening room at the moment.

Clearwave · Clearwave on Sat Jan 31, 2009 11:52 pm

Okay, I brought the Minuet5 down for some more measurements. As I discussed above, some room artifacts make their way into my measurements when I do a full gate in this room so ignore the slight room related hump at 200hz. I know it is room related because the same hump appears when I do this type of measurement in ARTA with other speakers.

So to start things off, here's the On Axis FR:

15 Degrees off axis in the horizontal plane:

45 Degrees off axis in the horizontal plane:

15 Degrees off axis in the vertical plane:

So in summary the power response is very flat resulting in no peaks through the presence region of 1-5k.

Bear · Bear on Sun Feb 01, 2009 10:46 pm

Very, very impressive off-axis response.

Musicman · Musicman on Tue Feb 03, 2009 6:13 am

Hi, I'am the customer that Jed has been talking about that is building his own cabinets for the Minuet 5's. I am new to this site and would like to share some of my thoughts on this particular build. Unfortunately at this time I have not started my build. However once I start I will document the build step be step and attach a few photos as well.

- Gary

Clearwave · Clearwave on Tue Feb 03, 2009 8:22 am

I'm looking forward to your build, Gary. Thanks for chiming in here.

Regards,

Jed

ripcard · ripcard on Tue Feb 03, 2009 10:28 am

Musicman wrote:Hi, I'am the customer that Jed has been talking about that is building his own cabinets for the Minuet 5's. I am new to this site and would like to share some of my thoughts on this particular build. Unfortunately at this time I have not started my build. However once I start I will document the build step be step and attach a few photos as well.

- Gary

Welcome Gary and good luck with your build. I also look forward to seeing this new design realized. Hope you have as much fun as I did with my 2 Ts.
Take care, Rick.

Bear · Bear on Wed Feb 11, 2009 3:45 am

Jed - How's the revised XO coming? Any new pics for FR? What's different about the revision?

Bill

Clearwave · Clearwave on Wed Feb 11, 2009 4:52 am

Bear wrote:Jed - How's the revised XO coming? Any new pics for FR? What's different about the revision?

Bill

Hi Bill. I've got a lot of crossovers to assemble this week including yours. Without revealing my topology configuration, let's just say I was doing some new work with the phase to align things better, which required some new cap values.

The FR will be the same as the above within .25db or so. Nothing major. I just want everything to be perfect before sending out the boards. I'll try to wrap things up before this weekend- at which point I'll post more info including the final FRs.

Jed