I've built the Linkwitz Pluto, utilizing a MiniDSP and cheap ($50) 4x100 @ 4ohms Sure TK2050 Class D board. The result is outstanding, even with the board a little under powered with a 24V SMPS. My plan is to upgrade to a few high quality classdaudio boards in the near future, enclosed in a nice chassis with a toroidal transformer.
I made a YouTube video. My cheap pocket camera does not do the accoustics justice, but you get the idea....
/Mason
I made a YouTube video. My cheap pocket camera does not do the accoustics justice, but you get the idea....
/Mason
While you can build a speaker that's similar to a Pluto, you can't build a Linkwitz Pluto unless you use all the Linkwitz parts.
Same drivers. Same filtering (via DSP rather than Opamps). Different amplifier. Not much difference, unless you want to split hairs in regard to branding. Linkwitz himself even suggests to use of DSP in his Linear Audio - Volume 0 article "STEREO - From live to recorded and reproduced - What does it take?"
Linkwitz said:
I don't see a problem with updating the design with newer DSP technology and a quality Class D amplifier. The sound is still outstanding, to me.
Well if you use the same drive units and emulate Linkwitz crossover down to the last detail then you've got yourself a Pluto imo. How you implement the xover (providing the filters are the same) is irrelevant, as is the amplification.
To quote SL, "The function of the ASP could be duplicated with a digital signal processor, DSP, by realizing the poles and zeros of the different transfer functions, and following the same signal flow and gain distribution. Still great care must be taken to have enough dynamic range for each number processing stage to minimize non-linear distortion. Such custom DSP design is not trivial and requires good firmware programming knowledge and technique." so no slam dunk unless the implemetation satisfies all of SL's caveats.
He's clearly not trying to fob this off as some kind of exact copy of the Pluto. I think you need to lighten up a little. Also, he's working on this in his house for his own enjoyment so he can call it whatever he wants. Dragging this thread into the dank and miserable depths of a semantic argument about what he can and can't refer to his speakers as is the definition of trolling.
Mason - That's really cool. I just bought a miniDSP and I am very interested in seeing other peoples results programming it. My first try at it was replicating the crossover in my Overnight Sensations. I think it was fairly successful! Perhaps you could post some screen shots of the plug-in settings?
Kyle
Mason - That's really cool. I just bought a miniDSP and I am very interested in seeing other peoples results programming it. My first try at it was replicating the crossover in my Overnight Sensations. I think it was fairly successful! Perhaps you could post some screen shots of the plug-in settings?
Kyle
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It's difficult to match transfer function curves by scaling photographs and estimating. 🙂
Mason supplied the .xml file (originally from Kentaro) to everyone on the Orion Users Group. (Still there and anyone can download it.) I loaded it into my miniDSP 2x4 and unfortunately it doesn't match the curves created by a real Linkwitz Pluto ASP.
Kyle,
We try to follow the lead/direction of Mr. Linkwitz for DIY projects like this. He ENCOURAGES this type of project/experimentation, but he only requests that the builder not name the project "Pluto" or "Orion" or whatever. These are projects where the builder has not purchased Construction Plans or circuit boards and/or compensated Mr. Linkwitz in any way. I know this seems a silly concept to some folks involved with "DIY" audio. (Probably like holding back the wind, at this point.) 🙂
Cheers,
Dave.
Mason supplied the .xml file (originally from Kentaro) to everyone on the Orion Users Group. (Still there and anyone can download it.) I loaded it into my miniDSP 2x4 and unfortunately it doesn't match the curves created by a real Linkwitz Pluto ASP.
Kyle,
We try to follow the lead/direction of Mr. Linkwitz for DIY projects like this. He ENCOURAGES this type of project/experimentation, but he only requests that the builder not name the project "Pluto" or "Orion" or whatever. These are projects where the builder has not purchased Construction Plans or circuit boards and/or compensated Mr. Linkwitz in any way. I know this seems a silly concept to some folks involved with "DIY" audio. (Probably like holding back the wind, at this point.) 🙂
Cheers,
Dave.
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Have a look at the L15D or L20D (2092 based Class D) threads, they are a nice economical ClassD solution that people are having success with..
It's not a silly concept at all if Mason was trying to replicated the Pluto for commercial purposes or was proclaiming that he had designed it himself. He's referring to it as a Pluto because it's such a distinct looking speaker if he didn't refer to the original design/er his post would be misleading to the readers who aren't aware of the Pluto or SL's designs. I am sure we can all appreciate that the true Pluto is more than just the drivers and the enclosures. Beating Mason over the head about it is the silly part. If he had posted "Look what I built!" and didn't use the words "Pluto" or "Linkwitz" the hew and cry would have been 10x. Too bad there isn't a face-palm smiley.
Kyle
Kyle
Planets beyond Neptune - Wikipedia, the free encyclopedia
I was just messing around.
I am going to refrain from any more of this OT chatter.
Kyle
I was just messing around.
I am going to refrain from any more of this OT chatter.
Kyle
OOHHHH Very slow here today..
Actually That's a Great reference..
And I like the idea.. Planet-X omnidirectional.. make people work a bit..
Actually That's a Great reference..
And I like the idea.. Planet-X omnidirectional.. make people work a bit..
Well of course . . . the digital delay alone (as opposed to delay by all-pass) will result in slight change (and probably an improvement, overall). And there's an oft noted variance in the response of NSW2 samples that is probably greater still, so the ability to easily tailor transfer function curves to correct that is a clear advantage . . . it could well be that a "digital" ASP gives closer to the desired response curve than an exact copy of the analog ASP.
Just saying "doesn't match" doesn't say much of anything without description and quantification of the "error".
I propose that all PLUTO derived (pipe mounted omni) designs be "named" as TNOs (of which Pluto is, despite being the first named, just one of many). I call my 6" pipe with a AA6.5 set at an angle on the end of it "ERIS", for example ('cause it's bigger than Pluto).
It's certainly possible that the "stock" ASP transfer curves weren't the "target" for this design. Maybe some tailoring was going on, but I assumed not since there was no mention of it. Forgive me if I made a false assumption. 🙂
Anyways, you're correct that saying "doesn't match" doesn't describe the "error." I can supply overlaid curves if that would satisfy someone's curiosity, but I don't see the point.
FYI, the original miniDSP Pluto setup (that has been copied incorrectly by some) was actually done by me.....a few years back. 🙂
Cheers,
Dave.
Anyways, you're correct that saying "doesn't match" doesn't describe the "error." I can supply overlaid curves if that would satisfy someone's curiosity, but I don't see the point.
FYI, the original miniDSP Pluto setup (that has been copied incorrectly by some) was actually done by me.....a few years back. 🙂
Cheers,
Dave.
I have to apologize to Mason for being way to harsh.
This is the link to the Pluto's user group thread:
ORION/PLUTO Users Group • View topic - MiniDSP + ClassD
This is the link to the Pluto's user group thread:
ORION/PLUTO Users Group • View topic - MiniDSP + ClassD
moretty is online now moretty
diyAudio Member
Join Date: Jul 2019
Hi guys! It turns out that I did some tarkus by paul carmody. once finished I had to take them out of the room, they were very big and ugly for my girlfriend Xd. Then I made some zaph audio monitors and as you also saw the linkwoz subwoofer pluto and my idea was to take out the two subwoofers of the tarkus and make two pluto. Do you know if it is possible to do it with a hypex amplifier? forgive for writing, I am Spanish and I use a translator. Thank you