Interesting loudspeaker design
mhardy6647
Posts: 33,960
Saw this at AK and thought it was worth mentioning over here, too... interesting idea, actually... not necessarily just post-hipster ephemera.
http://danielballou.com/#cinder-speakers
http://danielballou.com/#cinder-speakers
Comments
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What's holding the cinder block?
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
They also work as nice boat anchors, or to give Vito something to listen to while he swims with da fishesThe 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 -
LOLnooshinjohn wrote: »They also work as nice boat anchors, or to give Vito something to listen to while he swims with da fishes
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/ -
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/ -
Interesting idea, would like to hear those. Wonder how resistant to vibration cinder block is? Better than MDF?"Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
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We're showing our age fellas. Unless you live near a coal power plant, the're all concrete block nowadaysHome 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/ -
Concrete Audio N1 - 27,034 Euros ($35,841). excl. Taxes and shipping
TECHNICAL DATA MODEL N1.
Housing: Concrete, monolithically poured
System: 2-way closed-box, passive
Frequency range: 34 Hz – 40,000 Hz
Power handling: 100 W
Sensitivity: 83 dB (1 W/1 m)
Total Harmonic Distortion: < 1% bei 90 dB SPL (1 m) für f > 100 Hz
Nominal impedance: 4 Ohm
Crossover frequency: 6 dB/2,000 Hz
Ports Single-wiring/bi-wiring
Components: Scan-Speak, Kimber Kable, Mundorf, WBT
Dimensions: Height: 110 cm (43,3 in)
Width: 23 cm (9,1 in)
Depth: 33 cm (13 in)
Net weight: 80 kg (176 lbs)
http://www.concrete-audio.com/en/concrete-audio/2.2 Office Setup | LG 29UB55 21:9 UltraWide | HP Probook 630 G8 | Dell Latitude | Cabasse Stream Amp 100 | Boston Acoustics VS 240 | AUDIORAX Desk Stands | Mirage Omni S8 sub1 | Mirage Omni S8 Sub2 -
westmassguy wrote: »
They don't seem to touch the blocks, just straight through the front and back boards.
Klipsch RB81, KG3.5, B&W DM602.5, Polk.
Subwoofers: Klipsch RW10, Triad ProSub Bronze. -
There are gaskets on the boards that (presumably) effect a seal.
I think that a layer of some smooth mastic/plaster/polymer material applied to (e.g., trowled on to) the surfaces of the blocks that will touch the front & rear baffles would be a good idea.
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Not being an engineer I can't tell if that's crazy or good? What I do recall from a LOT of top end speaker designers is all the talk about good "resonances" and materials. Totem comes to mind. The Rainmakers are, correct me, if I am wrong, only 12 lbs in weight, have very little damping material and actually RELY on internal sound not being silenced?
cnhCurrently 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] -
B&W states that their Matrix enclosures store less energy, and sounds better than concrete enclosures.
2.2 Office Setup | LG 29UB55 21:9 UltraWide | HP Probook 630 G8 | Dell Latitude | Cabasse Stream Amp 100 | Boston Acoustics VS 240 | AUDIORAX Desk Stands | Mirage Omni S8 sub1 | Mirage Omni S8 Sub2 -
I have an addled memory that regular old concrete is kind of ringy.
I do know, e.g., that granite is a lousy material for, e.g., turntable "plinths" -- it is quite lively compared to, e.g., slate.
One of the local NE gurus has embraced an interesting and ostensibly environmetnally responsible (and not terribly expensive) engineered material called paperstone for plinthing.
http://www.paperstoneproducts.com/
I don't know whether it has any potential for use in loudspeaker enclosures, though...
