Re: exterior porn...and a Q for Dave...
In the works, I believe. =)
Thanks Stew, they are very pretty - that bamboo plywood is beautiful. But I didn't build them, my associates up in Seattle did. So they are closer than you think....
You're gonna love yours, I'm sure.
I'm half way thru a pair of open baffles using 1/4" bamboo ply as veneer over 1" pine. Nice looking, kinda like a big (16x35") cutting board.
When I dragged one into the living room this afternoon my wife called it a "cute little speaker." Now that's WAF!
I think the Mileva fits the "cute little speaker" description pretty well, too.
planet10 said:
In the works, I believe. =)
Nanook said:
Thanks Stew, they are very pretty - that bamboo plywood is beautiful. But I didn't build them, my associates up in Seattle did. So they are closer than you think....
You're gonna love yours, I'm sure.
I'm half way thru a pair of open baffles using 1/4" bamboo ply as veneer over 1" pine. Nice looking, kinda like a big (16x35") cutting board.
When I dragged one into the living room this afternoon my wife called it a "cute little speaker." Now that's WAF!I think the Mileva fits the "cute little speaker" description pretty well, too.
Corloc said:
Sort of. In the end they are sort of a mass-loaded BIB, but we call them ML-Vs
Here is the (now not so) secret receipe for a monoloth. Take a Metronome (or an actul ML-V) and fold it just above the driver position (usually 50% in an ML-V). Convert the port to a slot (the higher the aspect & the longer it is the more aperiodic the characteristic -- and with the desired placement close to a wall these can provide more bass than you want*), and remove the little tiny piece representing the top so that the line reaches to a point. Some juggling of depth may be required to get the driver to fit, get the width right.
*(resistively loading the port with some foam can further tune the bottom if you have too much, as can polyfluff just above & below the driver)
I would appreciate it, if any designs that come of these get feed back so i can post them on the box-plans page.
Anytime you can use 1 piece to do 2 jobs i like it... elegance was something i took away from all those math proofs i did in University.
dave
Monolithists of the world unite!
My original intent and a little history...
originally my intent was to rebox some DCM Time Frames (TF250s) for my nephew--he has two pairs. I sold these when they were new. The speakers, although not very revealling, and not terribly expensive (at the time they sold for CAD$300/pr), made music.
Upon opening the enclosures, the drivers, box and crossover were not worth improving, each were terribly low quality, so on to a "monolith" search. That was 2 or 3 years ago and my introduction to diyAudio.com .
I never thought it would all end up here, trying my Hemps in a Demetri. I do have to say that the biggest challenge has been getting the panels cut, and cutting out the openings for the drivers. Next biggest challenge: the side "horn" attachment. no router use, just well glued butt joints (Bulldog PL300 construction adhesive works great for this). Hoping next pair will be easier.
For all who have two left thumbs: If I can do it, anybody can. And for any that think a full range driver can't possibly make bass, or have enough "sparkle" think again.
The Hemps I purchashed are excellent in this regard. So too are the Fostex drivers, and even my old 12" Oxfords (although they do need a tweeter).
So for any that might doubt that they could live with a single driver: until you try them, don't discount them as an option. You can always add an active sub if you need more bass, or an add on tweeter (like the Fostex types) if you need more sparkle.
I've even made a convert of my eldest daughter's boyfriend---he's dumping home theatre in favour of good two channel (not expensive, but good).
My original intent and a little history...
originally my intent was to rebox some DCM Time Frames (TF250s) for my nephew--he has two pairs. I sold these when they were new. The speakers, although not very revealling, and not terribly expensive (at the time they sold for CAD$300/pr), made music.
Upon opening the enclosures, the drivers, box and crossover were not worth improving, each were terribly low quality, so on to a "monolith" search. That was 2 or 3 years ago and my introduction to diyAudio.com .
I never thought it would all end up here, trying my Hemps in a Demetri. I do have to say that the biggest challenge has been getting the panels cut, and cutting out the openings for the drivers. Next biggest challenge: the side "horn" attachment. no router use, just well glued butt joints (Bulldog PL300 construction adhesive works great for this). Hoping next pair will be easier.
For all who have two left thumbs: If I can do it, anybody can. And for any that think a full range driver can't possibly make bass, or have enough "sparkle" think again.
The Hemps I purchashed are excellent in this regard. So too are the Fostex drivers, and even my old 12" Oxfords (although they do need a tweeter).
So for any that might doubt that they could live with a single driver: until you try them, don't discount them as an option. You can always add an active sub if you need more bass, or an add on tweeter (like the Fostex types) if you need more sparkle.
I've even made a convert of my eldest daughter's boyfriend---he's dumping home theatre in favour of good two channel (not expensive, but good).
From what I understand the Demetris plans are designed for the Hemp Acoustics FR8C (or FE207) which is a totally different driver than the A Brown Soun FR8. The differences have been talked to death in other threads but I just wanted to check if I get the A Brown Soun drivers, will they work in the Demetris design? Cool design and nice builds so far!
Thanks - Max
Thanks - Max
maxdd_nj said:
If you get the TT drivers and we determine that Demetri isn't the right vehicle then we'll just come up with a monolith suitable for them. (that the same box is OK for FR8c, FE207 and FE167 (the last with a minor port change) illustrates that it is a pretty tolerant box,
What are the most recent parameters for these?
dave
Thanx for that Dave - I have given serious thought to a de-whizzered, phase plugged, EnABLed FR8c... that with tweeter support in Demitri should make for a pretty satisfying 'speaker.
As for the TT green cones, I think Dr Dan was pushing TT to release those a while back. IIRC they had a pretty steeply rising response that Dan eq'ed out on Foobar?
Thanx again Dave.
whizzerless Hemp FR8c...
well as the owner of the p10 modded Hemps I can tell you several things...
well as the owner of the p10 modded Hemps I can tell you several things...
- the bass from the Hemp/Demetris is near subwoofing (using a Sony SCHP 1001 as a cd player)
- I think that after 3-4 months now, I can say the whizzerless Hemp is smoother, with help from C37...
- and so on and so on
I did the EnABL pattern on the FR8c you see posted. Did the painting at 6AM in the hotel bathroom! My buddies Mike and Brain actually built the box. Mike is working on a version with a supra-baffle and some more curves to the box. Bamboo, of course.
Talked to Mike today, he likes the sound he's getting out of the Demetri a lot. Says it sounds great and has plenty of bass when right up against the wall. If it weren't for cosmetic reasons, he would put the binding posts on the side of the box, so that the speakers could be snug against the wall. BSC? What BSC?
I haven't heard the FR8c without the whizzer, but have seen a plot of one sans whizzer and with phase plug. Looked very smooth. No top octave, but that's what super tweeters are for, right?
Is that what you have, Nanook?
Talked to Mike today, he likes the sound he's getting out of the Demetri a lot. Says it sounds great and has plenty of bass when right up against the wall. If it weren't for cosmetic reasons, he would put the binding posts on the side of the box, so that the speakers could be snug against the wall. BSC? What BSC?
I haven't heard the FR8c without the whizzer, but have seen a plot of one sans whizzer and with phase plug. Looked very smooth. No top octave, but that's what super tweeters are for, right?
Is that what you have, Nanook?
Hi Nanook and Pano'
Thanx for the info on the Hemps and Demitri. Seems I have made a decision to go with these... I will send P10 an email WRT modded hemps when I am a little closer. I have been putting off changing my system for a while due to a demanding study schedule and having a decent system already. Well, I am just finishing up my last semester (two weeks to go) and am moving to a smaller place in Sydney early next year - which means no room for tall ribbons 1.5m into the room!
Seems that as one part of a journey comes to a close another begins.
Thanx guys.
Thanx for the info on the Hemps and Demitri. Seems I have made a decision to go with these... I will send P10 an email WRT modded hemps when I am a little closer. I have been putting off changing my system for a while due to a demanding study schedule and having a decent system already. Well, I am just finishing up my last semester (two weeks to go) and am moving to a smaller place in Sydney early next year - which means no room for tall ribbons 1.5m into the room!
Seems that as one part of a journey comes to a close another begins.
Thanx guys.
sans whizzer and mit phase plug..
I damaged my Hemp Acoustics FR8Cs just prior to heading to Vancouver Island DIY audiofest this past summer. Dave cut the whizzers off, and added the phase plugs, and c37 to the cones.
a huge difference. I've been a little chicken to EnABL them cause I don't have the correct stuff to do it with. I however do agree completely with BudP's ideas, and the EnABL process makes absolute sense to me....one day I may get my nerve up, else do my reversible EnABL mod (don't ask, it'll only drive ya crazy).
I have considered using 100% natural latex rubber painted on in the correct pattern as well.
tonight I finally heard the Demetris near sub-woof using a Sony Playstation (unmodded) as a cdplayer. Many are amazed at what the playstation can do. Do yourself a favour and get one while you can. I'm even contemplating having "knock-offs" to be built using many of the same components. Maybe have to ask the big red S for some licencing...
I damaged my Hemp Acoustics FR8Cs just prior to heading to Vancouver Island DIY audiofest this past summer. Dave cut the whizzers off, and added the phase plugs, and c37 to the cones.
a huge difference. I've been a little chicken to EnABL them cause I don't have the correct stuff to do it with. I however do agree completely with BudP's ideas, and the EnABL process makes absolute sense to me....one day I may get my nerve up, else do my reversible EnABL mod (don't ask, it'll only drive ya crazy).
I have considered using 100% natural latex rubber painted on in the correct pattern as well.
tonight I finally heard the Demetris near sub-woof using a Sony Playstation (unmodded) as a cdplayer. Many are amazed at what the playstation can do. Do yourself a favour and get one while you can. I'm even contemplating having "knock-offs" to be built using many of the same components. Maybe have to ask the big red S for some licencing...
Anyone have an answer for my question? The Hemps do share the same BIB dimensions as the B20, here are the measured specifications courtesy of slomatt, which seem to be slightly different than the manufactured specs given:Fast1one said:So many options, so little time
How would these work for say the Pioneer BOFU? And how would it compare to the half-changs? My drivers are coming in soon, Im so confusedThese look so much more elegant than the Half changs, not to mention practically no need for a BSC
Note the QTS is lower as well as the FS when compared to the manufacture specs.slomatt said:
Edit: Reviewing the specs for the Hemp, looks like it will work, only difference is the FS (About an 8 hz difference) would this lead to lower bass? Or would the cabinets have to be changed slightly?
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