well -- why not? An open baffle thread
mhardy6647
Posts: 33,763
in Speakers
Comments
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I am openly baffled by these replies ;- )
C'mon -- youse guyses know about open baffles?! the Carver Amazings were open baffles...
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Those little guys are as crude as crude can get. Also, your NHSM (New Hampshire Stabilization Method) is ridiculous!! The only thing right about your picture is what's in the background on top of the sub.
With all that said, i WILL find time to hear those. I promise.Where’s the KABOOM?!?! There’s supposed to be an Earth shattering KABOOM!!! -
OB's are fun! Here is my somewhat modified MJK passive OB using Fostex FF85k and Eminence Alpha 15a
A day without music is like a day without food. -
Oooh, those look really nice -- now that's what I'm talkin' about!
The OBs in the post above are "proper" designs (based on Martin King's excellent work and careful, thoughtful designs).
The OBs in the first post were "built" to test some drivers -- I had a piece of 1 x 10" pine shelving. I cut it in half and free-handed holes for 8" drivers. Being a frugal Yankee :- ) I used the cutouts to make bases for the OBs; I thought that was beastly clever*.
Extremely scientific ;- )
At the moment, there are a pair of EV "Wolverine" LS-8 twincone "fullrange" drivers mounted in the OBs. The relatively high weight of these drivers necessitated the addition of audiophile-approved, native New Hampsha granite counterweights to keep everything erect :-P
How do they sound? Well, the EV drivers have a high Qts and are thus quite OB-friendly, but the baffles are (way) too small for best results. There's a certain 'thinness' to the sound off-axis that's quite noticeable... but on-axis... hoo-boy! They actually sound remarkably good, and, as one might expect, they image rather phenomenally.
* as my father would say, "Don't break your arm patting yourself on the back!"
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DSC_3771 by Mark Hardy, on Flickr
DSC_3770 by Mark Hardy, on Flickr
DSC_3773 by Mark Hardy, on Flickr
(no, I am not proud of my 'craftsmanship' -- but it was 'fit for purpose' for a test baffle)
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Ok well this isn't open baffle but it is a full range DIY speaker that is Doc's fault I built so I'm adding it as I can remove one side and make it open baffle
it is a Fostex BK-16 6.5" Full-Range High Efficiency Folded Horn Kit
I have it built and just need to add the driver and binding post to it. then I realized I cant even test it till I make another one
anyway it is the good Doctor/ or mad Doctor fault for pushing me down this hole and it turn out ok I think even though my wood working skill is Zero.
2 ch- Polk CRS+ * Vincent SA-31MK Preamp * Vincent Sp-331 Amp * Marantz SA8005 SACD * Project Xperience Classic TT * Sumiko Blue Point #2 MC cartridge
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD -
Looking good!
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I now have a nice collection of bar clamps
doing some more reading on open baffle and such....what do you think of this driver?
http://www.decware.com/newsite/FRX.html
I like the fact that some of these are simple to build and make a nice simple DIY project
2 ch- Polk CRS+ * Vincent SA-31MK Preamp * Vincent Sp-331 Amp * Marantz SA8005 SACD * Project Xperience Classic TT * Sumiko Blue Point #2 MC cartridge
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD -
Steve Deckert has a very high opinion of himself and his products.
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I dig the open baffle sound. So many intriguing implementations from various speaker makers. Though I must admit, open baffles means different things to different people. At my age, it means something like this....
HT SYSTEM-
Sony 850c 4k
Pioneer elite vhx 21
Sony 4k BRP
SVS SB-2000
Polk Sig. 20's
Polk FX500 surrounds
Cables-
Acoustic zen Satori speaker cables
Acoustic zen Matrix 2 IC's
Wireworld eclipse 7 ic's
Audio metallurgy ga-o digital cable
Kitchen
Sonos zp90
Grant Fidelity tube dac
B&k 1420
lsi 9's -
Let me point out the reason for my modification of MJK's small passive OB shown above:
Some people complain about the Alpha 15a having muddy bass. I think that this maybe due to mounting the 15" woofer on a too thin, poorly supported baffle. Thus my addition of small 'wings' as bracing and 2x4's for stiffening.
Cheers, Jim
A day without music is like a day without food. -
I noticed the 2 x 4s :- ) I'd like to hear those; they certainly look like they've got chops.
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Just in the sake of lexicographical clarity, I meant in the previous post that I'd like to hear the loudspeakers -- not the 2 x 4s per se.
;- )
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Ok well this isn't open baffle but it is a full range DIY speaker that is Doc's fault I built so I'm adding it as I can remove one side and make it open baffle
it is a Fostex BK-16 6.5" Full-Range High Efficiency Folded Horn Kit
I have it built and just need to add the driver and binding post to it. then I realized I cant even test it till I make another one
anyway it is the good Doctor/ or mad Doctor fault for pushing me down this hole and it turn out ok I think even though my wood working skill is Zero.
Look pretty darn good to me Darryl. If you do build a second, and like their sound, covering them with PSA backed Veneer would be easy peasy.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
Thanks, I thought about doing something like Veneer instead of staining them, I'm working on the 2nd one now!2 ch- Polk CRS+ * Vincent SA-31MK Preamp * Vincent Sp-331 Amp * Marantz SA8005 SACD * Project Xperience Classic TT * Sumiko Blue Point #2 MC cartridge
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD -
I looked up Martin King, dude lives right down the road from me...
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Love the mass speaker loading. Wouldn't be a couple of PET ROCKS from the '70s?
Come to think of it I have some wood around here. You have piqued my curiosity!
Nice skyline shot!Currently orbiting Bowie's Blackstar.!
Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
[sig. changed on a monthly basis as I rotate in and out of my stash] -
deleted....................................
The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD
“When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson -
My latest Open Baffle build...
Features the 16 per side of the Faital 3FE25 drivers. Total Q of .7, 91db listed sensitivity, 110hz FS, 100-20k. I'm running them down to about 200hz where, of course, OB woofer line of 4 10's take over. Line level crossover courtesy of Bryston, a pair of the First Watt F-1's for power. So 10w per line, bass and mains on each channel.
Climb out of the box and you never want back in!
CJA so called science type proudly says... "I do realize that I would fool myself all the time, about listening conclusions and many other observations, if I did listen before buying. That’s why I don’t, I bought all of my current gear based on technical parameters alone, such as specs and measurements."
More amazing Internet Science Pink Panther wisdom..."My DAC has since been upgraded from Mark Levinson to Topping." -
^^^^
Holy smokes now that is COOL JAZZ
2 ch- Polk CRS+ * Vincent SA-31MK Preamp * Vincent Sp-331 Amp * Marantz SA8005 SACD * Project Xperience Classic TT * Sumiko Blue Point #2 MC cartridge
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD -
Jim Shearer wrote: »OB's are fun! Here is my somewhat modified MJK passive OB using Fostex FF85k and Eminence Alpha 15a
Hey Jim, I'd love to see your crossover's for these & how did you make the small hole on the back for the Fostex?
2 ch- Polk CRS+ * Vincent SA-31MK Preamp * Vincent Sp-331 Amp * Marantz SA8005 SACD * Project Xperience Classic TT * Sumiko Blue Point #2 MC cartridge
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD -
I keep coming back to this thread but I just don't get it...a couple of speakers on 1x5's and lamp cord to boot.
Anaheim Hills CA,
HT 5.1: Anthem MRX 720 / BDP-Denon DBT1713UD / Polkaudio LSiM703 / W4S mAmp's / Polkaudio LSiM706c / Polkaudio LSiM702F/X's / SVS PC12-NSD / Panasonic TC P55VT30
2 Channel: Rogue RP-5 / WireWorld Electra power cord / Marantz TT-15S1/ Ortofon - Quintet Black MC / Marantz NA8005 DAC / W4S mAmp's / Synology DS 216+ll-4TB / Polkaudio LSiM703 -
I'm guessing that maybe, just perhaps, you haven't heard them...
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2 ch- Polk CRS+ * Vincent SA-31MK Preamp * Vincent Sp-331 Amp * Marantz SA8005 SACD * Project Xperience Classic TT * Sumiko Blue Point #2 MC cartridge
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD -
those are the Linkwitz 521's...good sounding speaker and DIY project2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC
erat interfectorem cesar et **** dictatorem dicere a -
@mhardy6647 How do single driver open baffle setups compare to SDA's as far as soundstage /imaging/hearing stuff all around the room and not just right in front of you?afterburnt wrote: »They didn't speak a word of English, they were from South Carolina.
Village Idiot of Club Polk -
well - the twincones have really limited dispersion, so you're pretty much locked in to the center to get the full effect. Coaxes on OBs are better in that regard; I won't really be playing with any true coaxes (like that Hawthorne, heh-heh-heh) until I "build" a proper pair of baffles.
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mhardy6647 wrote: »I'm guessing that maybe, just perhaps, you haven't heard them...
I haven't but looking at it doesn't it screwup the phasing because the forward and rearward generated sounds are out of phase with each other? Maybe that's the effect is that you're talking about?Anaheim Hills CA,
HT 5.1: Anthem MRX 720 / BDP-Denon DBT1713UD / Polkaudio LSiM703 / W4S mAmp's / Polkaudio LSiM706c / Polkaudio LSiM702F/X's / SVS PC12-NSD / Panasonic TC P55VT30
2 Channel: Rogue RP-5 / WireWorld Electra power cord / Marantz TT-15S1/ Ortofon - Quintet Black MC / Marantz NA8005 DAC / W4S mAmp's / Synology DS 216+ll-4TB / Polkaudio LSiM703 -
Like any dipolar radiator (edit: e.g., Magneplanars, or the original Quad ESL-57 electrostatcs), that does indeed have to be managed. I am of the opinion that placement of OBs is pretty critical "for best results", but lots of OB fanboys imply (and sometimes even claim explicitly) that they're actually pretty easy to place in a room.
I am still rather heavily biased towards relatively traditionally loaded loudspeakers, but there's fun to be had in the simple, pure space that OBs with appropriate drivers can afford.
https://www.youtube.com/watch?v=hdbzRRTD3Ww
