CraigJ

Jon Marsh,

I just want to thank you for the fantastic speakers you designed. High end (store bought) speakers were way out of my budget, and you allowed me to enjoy something that I would not have been able to acquire on my own, not to mention the fun I had building!

My holiday gift to you (it's coming in a big box ) is more time away from work to enjoy other passions!

Again, many thanks,

Craig

p.s. I am sure that I'm not alone

JonMarsh

Thanks for the kind words and thoughts, Craig! It's guys like you and all the great gang at HT Guide that make the effort worthwhile (that and getting to listen to my stuff myself! This isn't all about altruism, you know!).

I'm hoping to make some more progress this Christmas, have two weeks off scheduled.

Can you spell, "Isiris" ?

And lets not forget the RS52 based center channel- a lot of folks seem to want those under their tree!

~Jon

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ThomasW

Did you say Isiris........

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JonMarsh

Leave you to come up with a tawdry connection....

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ThomasW

Hey I just typed your word into google....

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jkrueger

You guys are killin me....What is "Isiris"?

Edit...That wasn't a "highjack" was it?

ThomasW

http://www.htguide.com/forum/showpo...120&postcount=6

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David Meek

Unless Jon's gotten into hefty belly-dancers (too much info, IMO snickering sound in the background) then I'm betting it's a new DIY speaker. . . maybe?

Oh, Thomas just squeaked his post in before me.

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JonMarsh

This is not just vaporware- pictures from last week, but not reflecting current work completed....






They're heavier and stronger than they look - and that's without drivers filling the holes. First waveguide assembly is completed and threaded inserts for woofers installed.

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David Meek

Is the actual front panel shorter than the one shown in the rendering?

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Evil Twin

Move along now... these aren't the droids you want... there's nothing here for you.

We know this is all just a plot to annoy Neil Patel...


This is just a distraction until the M10ta in development is ready...

NS10-513 woofer, C89-6 Midwoofer, C13 tweeter with waveguide.


Oh, it isn't April yet? Are you sure about Imperial to Gregorian calendar conversions? Christmas? Oh crap....

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Dougie085

Who needs Christmas anyways? It'll just drain your pockets

JonMarsh

Yes, the first design is the rendered version; the shown baffle is as we say in the business "Article One" test proto, which after though and re-sim is a bit shorter and easier to build and less "imposing", and should work almost as well acoustically - the latter to be verified by measurement.

I.E., it's a ease of construction thing being tested for first article evaluation.

We'll leave the Saen-Saints project for those who want something REALLY large... these will be ~48" tall when completed. That's kind of big for a lot of people...

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jonathanb3478

Well, "imposing" and "REALLY large" is kinda what I am after. Not to the same extent as kingpin, but still.

I really want to hear a really good dipole, but huge and over built "box" speakers speak to me on an emotional level. Even with out drivers in them.

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ssabripo

Holy COW!!!

that's pretty nice man.....wooot!

hey, so are there any plans down the road to get a nice WWMTM floorstander design with some Seas Excel drivers???

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kravi4ka

M10ta !!!!!!!!

ISIRIS !!!!!!!!

Can I be THAT patient ?!?!?!?! How much can I get for my sister (beautiful, PhD in psychology) ?

JonMarsh

Attractive? Degree in psychology? Quite a lot from the right parties, I'd imagine (I'm a psych major, never took an EE course in my life, but that's another story...

The Isiris SHOULD be running in pairs by New Years.

I can't speak about the M10ta, that's Evil Twin's bag... came right out of left field, and I fear it may have the similar motivation as the Isiris- annoy Neil Patel and provide lots of opportunity for breathing MDF dust. Or not. Filters recommended, obviously.

you know what they say, no one ever expects the M10ta, or the Spanish Inquistion.

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kravi4ka

MDF dust? Talking to the man that starts the router IN the house ? I have been diagnosed by the afore mentioned psychologist as addicted to speakerbuilding since I was 16 (Not to mention my latest purchase of 4 square meters of sandal wood from a hardwood floor shop for the purpose of making crossover boxes and baffles...)
It looks that the ISIRIS my be the last one though or at least I don't even see an engeneering effort that would make this obsolete in the next 20 years.
I don't know Neil Pattel but I do beileve he is a smart man and he knows who Evil Twin is... And he should be very happy to actually learns something from him ( uuuuh, I think being unhappy about the existance of the M10ta is not an option with Evil Twin, is it ?



P.S. Shure the Isiris is not intended for people in apartments but is there a minimum requirement for the room?

ThomasW

Jon's last post was from the airport just prior to boarding a flight to Austria (10day trip). He's supposed to have a high speed net connection at the hotel.....

Neil Patel is the "designer" for Avalon Acoustics

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Mark K

That looks really, really nice Jon.

You WILL bring them to the next diy, Right...?

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cjd

There's already one with RS drivers... Do you seriously expect to gain much with the Excels (other than looks)?

C

ssabripo

slight improvement in sound, much better looks.

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TacoD

Seas Excels are ugly! (so I would go for Dayton if I was going for the looks )

cjd

You're more likely to find an improvement in sound due to a difference in crossover designer.

Looks, I'll argue about. Each is unique. I love the copper. But I can't stand the mush grey. Now, if we could get the Dayton cones with a copper phase plug!

C

Bent

Yes, if it's not black, it goes back.

Jonasz

Jon, I read somewhere you planned a budget version of the Isiris with Dayton RSS12", Peerless Exclusive and some tweeter, are you still planning to do this? The thing is, I'm moving to the US in january and I don't know if I should just ship my existing system there or just leave it here for now and build something new. I know, it's a luxury problem but this move has drained my pockets and I can't afford a pair of "real" Isiris...

Btw, to ship my system there would be the same money as a better used car would cost...

ThomasW

Good audio equipment is 'cheap' comparatively speaking in the US. So no don't bring equipment with you unless you have some vintage gear that money can't buy.

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Jonasz

Thank's Thomas, you've just made up my mind!

Chris7

Plus, it's an excuse to DIY a whole new set of gear

kravi4ka

Aaaaa,I know who Neil Patel is (and I kind of like his speakers ), that's why I was hoping that he will not underestimate how important good behavoiur is for our friend from Coruscant (not only to stay in business but stay alive also).

I will not spam the forum anymore, just the excitement took over and I had to express my overwhelming joy before I put Moby's "God Moving Over The Face Of The Waters" on repeat and wait and wait and wait

P.S. The question about optimum (more like minimum as I see it) room dimensions was quite serious though and I hope Jon sees it when he comes back. Any information will be eagerly awaited you know,now that it looks so real...

JonMarsh

well, it might not be obvious, but I'm paying a lot of attention to weight in the new designs, so that I CAN try it in different locales. Might still need some strategic reinforcement of the frame/panel, but we'll see.

Of course, the $64,000 question is when will the next DIY be? But hopefully the answer is yes. I'm taking two weeks off at Xmas, so I expect a lot of forward momentum. I'm considering a full passive and a hybrid approach (using the re-released DCX2496 if it actually ships) for those who like some active crossovers, and retrofitting that to the orignal Arvo, too.

I'm pretty excited about this- it's been a while in planning, and unfortunately have had little time for work since March, but I've got pretty much all the parts in house (even an expensive pile of Cocobolo and Pau Ferro, and a big buyout of inductors from NorthCreek (you know how retro I am)), and now it's up to me...

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JonMarsh

Hello from Chicago O'Hare Airport!

Actually, the Isris will do much better in a smaller room than something like the Isis- part of why the Isris is being built instead of an Isis Klone- you need a large room to do the Cardas style placement that Avalon's and other high grade monopoles need for good bass fidelity. Just remember the pics of the Isis at RMAF a year ago.

In my case the Isiris will be in a condo living room. They should have the flexibility of placement of the Orions and Arvo, but a bit more oomph that the Orions and hopefully better off axis response smoothness, and flatter power response and lower overall distortion than the last Arvo version. After a lot of thought and experimentation, I've come to the conclusion (possibly erroneously) that the best in room fidelity will be with a dipole that maintains the same radiation pattern over a side range and doesn't shift to a cardiod in the bass frequencies, as this changes (and increases, I believe) excitation of room modes.

It may be that I'll add W cabeint dipole "subs" to this configuration; the pure passive version will have an inline LF equalizer to provide some lift below ~ 80 Hz down to 35 Hz. A hybrid version using DCX2496 wouldn't need that.

Fantasy idea #39 this week is a hybrid version using the DCX2496 with Aragon's on the bottem end amplification and those cute little Nuera tube amps on the top. With a midrange/tweeter grouping that's ~ 92 dB efficient, it's not like you'd need many watts... a small Ayre amp on top would be even better, I expect, but unfortunately pricier. Somedays I wish I'd talked Chas into making the amp part of their integrated available as just an amplifier.

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AJINFLA

Is that multiple thin layers of MDF that I'm seeing, or Plywood?

cheers,

AJ

JonMarsh

There's lots of good used equipment available here- start looking on Audiogon for some ideas.

For the lower cost Arvo Isiris I'm leaning towards the RS390 HF; a single one, instead of dual 12's. Depends on how it measures up, so to speak. The impedance would give a sensitivity advantage. Haven't finalized midwoofer choice, but so far the 830883 seems the one to beat. But I'm always open to suggestions. The 27TDFC in a waveguide seems like the totally logical bang for the buck choice- haven't been able to think of anything close in that price range, though again, I'm always open to suggestions.

Now, there are a lot of options if one wants to raise the gate on driver cost, but keeping the midwoofer under $100 and the tweeter under $50 seems like a reasonable approach for a "budget" system, yes?

Is this a permenant (more or less) move, or just a planned assignement? (some of our guys come over from Germany or Austria for 2-3 year assignments).

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