Eminence Beta-10CX 10' Coaxial DriverThe Eminence Beta-10CX 10' Coaxial Driver is recommended for professional audio midrange reproduction in sealed loudspeaker enclosures. Also suitable for midbass or floor monitor applications in vented 2-way speaker cabinets. The Beta-10CX's coaxial design facilitates use of an HF driver to extend frequency response. Standard 1-3/8'-18 TPI threaded insert. Eminence Beta 10CXA 10' Co-Ax Speaker is recommended for professional audio vocal wedges, or mid-bass in a sealed enclosure. Buy Coaxial speaker Eminence BETA-10CX, 8 ohm, 10 inch, without compression driver Product type Coaxial driver (bi-entry) Datasheet Internal link Eminence BETA-10CX Transport weight 3.8 kg Transport volume weight 3.61 kg.Eminence Beta-10CX. Eminence's Beta-10CX is a coaxial solution to the challenge of achieving efficient, extended range output.
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- 10' COAXIAL SPEAKERS: Beta-10CX: Eminence Beta-10CX: 10' Coaxial Speaker; 8 Ohms; 58Hz-20kHz; 250 Watts RMS; 500 Watts Program; 2' Voice Coil; Recommend Crossover is pxb2-2K5CX; To Be Used w/ 1' Screw-On High Frequency Driver(PSD2002S, ASD1001) Not Included. Item Price: $79.99. Free UPS Ground Shipping in the U.S. KappaLite KL3010CX-8.
- SKU: BETA-10CX Categories: 10', Coaxial Speakers, Eminence Pro Woofers, Pro Audio. Recommended for professional audio vocal wedges, or mid-bass in a sealed enclosure. Also works well in a vented enclosure as a satellite or monitor.ASD:1001 HF driver and PXB2:2K5CX crossover sold separately.
Description
BETA-10CX
Recommended for professional audio vocal wedges, or mid-bass in a sealed enclosure. Also works well in a vented enclosure as a satellite or monitor. *ASD:1001 HF driver and PXB2:2K5CX crossover sold separately.
Specs:
Nominal Basket Diameter 10″, 254mm
Nominal Basket Diameter 10″, 254mm
Nominal Impedance* 8 ohms
Power Rating Watts 250W
Music Program 500W
Resonance 48Hz
Usable Frequency Range 58Hz-20kHz*
Sensitivity*** 95.1
Magnet Weight 38 oz.
Gap Height 0.312″, 7.92mm
Voice Coil Diameter 2″, 50.8mm
Thiele & Small Parameters:
Resonant Frequency (fs) 48Hz
DC Resistance (Re) 5.53
Coil Inductance (Le) 0.75mH
Mechanical Q (Qms) 5.21
Electromagnetic Q (Qes) 0.43
Total Q (Qts) 0.39
Compliance Equivalent Volume (Vas) 64.2 liters / 2.3 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 173cc
Mechanical Compliance of Suspension (Cms) 0.39mm/N
BL Product (BL) 10.4 T-M Diaphram Mass inc.
Airload (Mms) 27 grams
Efficiency Bandwidth Product (EBP) 114
Maximum Linear Excursion (Xmax) 5.0mm
Surface Area of Cone (Sd) 344.9 cm2
Maximum Mechanical Limit (Xlim) 7.6mm
Mounting Information:
Recommended Enclosure
Sealed 14.2-19.8 liters/0.5-0.7 cu.ft.
Vented 15.6-85 liters/0.55-3 cu.ft.
Overall Diameter 10.08″, 256.1mm
Baffle Hole Diameter 9.05″, 229.7mm
Front Sealing Gasket Fitted as standard
Rear Sealing Gasket Fitted as standard
Mounting Holes Diameter 0.25″, 6.4mm
Mounting Holes B.C. D. 9.66″, 245.4mm
Depth 3.98″, 101mm
Net Weight 7.3 lbs., 3.3 kg
Shipping Weight 8.4 lbs., 3.8 kg
Materials of Construction:
Coil Construction Copper voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details Vented and extended core
Basket Materials Pressed steel basket
Cone Composition Paper Cone
Cone Edge Composition Cloth cone edge
Dustcap Composition Screened cloth dust cap
*ASD:1001 HF driver and PXB2:2K5CX crossover sold separately.
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99.59.187.200 | |
Posted on May 12, 2010 at 20:29:30 | |
green heron Audiophile Posts: 98 Location: Chicago Joined: February 19, 2010 | I'm working through Erik's volvotreter build and I finished the round 320 Hz tractrix horn (500 - 5,000 Hz) and 38 Hz Tapped horns (up to 100 Hz). I also picked up some JBL 2402 tweeters for above 5,000 Hz. Now I'm at the point where I've spent way too much time researching a 100 Hz to 600 Hz solution for mid/upper bass, and I need some suggestions. Here's what I'm considering: 1) Erik's 77 Hz conical horn (but I'd extend the length based on GM's suggestions, and it seems to loose steam well before 600 Hz, so that option could be dead in the water) 2) Karlson 12' (seems to be a lot of mixed feeling about them, and I've yet to see them plotted) 3) La Scala (I like the look of it with horns, but how would I ever time-align the fold) 4) Some type of petal conical horn would be cool, but I haven't found any plans. Would any of the above solutions work better than others? Do you have any other ideas with plans or dimensions (I only have a few hours per week to build and don't have a lot of time to experiment). Here's a link to my current build if you're curious. Scroll down to see the horns. I took a detour from my front-loaded horn project and posted my Buschhorns BLH build for my sunroom. diyfirefly.blogspot.com |
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RE: Midbass/Upper Bass help, posted on May 12, 2010 at 21:17:04 | |
Posts: 3839 Joined: December 6, 2001 | re:Karlson - make poor-fair looking plots - almost all of my old couplers loaded with fullrange or coaxial sound good - just put a new style Beta 10CX into a funky ancient diy K12 with 30 degree baffle, 10 degree 7-slit port board and no upper deflector - produces a startling bass drum -- - Its easy to make a good graph -Behringer 'Truth' for instance :^) - I'd say the little fullrange are clearer in general than coaxial but some of that is my grabbing a generic Eminence crossover. Using smaller drivers in the 12 restores some bass balance. I might not recommend the Karlson with horns on top as have not run that many with K12. Suzuki gsx 400 impulse manual. I recommend them instead of a horn system (including the one this pile is hiding - lol) Karlson Evangelist |
RE: Midbass/Upper Bass help, posted on May 13, 2010 at 04:00:45 | |
Posts: 98 Location: Chicago Joined: February 19, 2010 | Impressive stack, Freddy. I think I'll steer away from the Karlson as a midbass, but I do have some EV 12TRX coax drivers that would be pefect for a pair, so I may try out a pair someday since you speak so highly of them. The cabinets look easy enough to build. |
RE: Midbass/Upper Bass help, posted on May 13, 2010 at 05:08:07 | |
Posts: 729 Joined: March 18, 2002 | Get a copy of HornResp (free) and make a 80 or 100hz 1/2 size straight horn, with an exponential, hypex, or conical profile. It will be fine. I'd suggest using a 12' driver with it, but if length isn't a problem an 8' driver might be interesting. |
RE: Midbass/Upper Bass help, posted on May 13, 2010 at 06:16:19 | |
Posts: 590 Location: Georgia Joined: April 26, 2000 | 1) Erik's 77 Hz conical horn (but I'd extend the length based on GM's suggestions, and it seems to loose steam well before 600 Hz, so that option could be dead in the water) All large throat horns do. To get HF extension from such designs requires being filled in via the driver's HF beaming, break-up modes BW to fill in the horn's falling HF response BW and why I asked about measurements to see how well Erik matched the horn to the EV among other things. This can't be simmed in the horn programs I've used, though AkAbak may. So if you want to be horn loaded all the way to 600 Hz, then the throat must be much smaller (~7.2' dia. max) along with the driver if no phase plug is used, ergo the horn must be much longer to load down to 77/whatever Hz plus the driver needs a higher Xmax /power handling for a given peak SPL to offset its reduced piston area (Sd). GM Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents. |
treading similar waters, posted on May 13, 2010 at 06:24:16 | |
Posts: 820 Location: NJ/NYC Joined: August 3, 2001 | While not exactly the same course, I am treading similar waters. I have two pairs of horns being made, a large OS/LeCleach hybrid meant to be crossed in the 600-800hz range and a pair of 140hz LeCleach horns (see elevenhorns for example). I am planning to build some 38hz Tapped horns too. I also have some bass bins (direct radiator) with AE Lambda TD15Xs that I will press into action. In my case, I am looking at solutions to the 80hz - 300hz range. Most are huge if you are looking at FLHs. ---------------- 'When Khruschev said 'we will bury you' I don't think he meant with surplus parts.' zacster |
RE: Midbass/Upper Bass help, posted on May 13, 2010 at 06:27:16 | |
Posts: 590 Location: Georgia Joined: April 26, 2000 | Actually, as a pure mid-bass I believe you'd be hard pressed to get any more performance out of any other alignment in the same bulk, but your 600 Hz goal is asking a bit too much of it for a high SQ system AFAIK, but if mated to a 250-300 Hz HE system, that could be right entertaining, especially if coupled to a BP 'sub' to fill in the bottom couple of octaves. GM Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents. |
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RE: treading similar waters, posted on May 13, 2010 at 06:59:38 | |
Posts: 590 Location: Georgia Joined: April 26, 2000 | In my case, I am looking at solutions to the 80hz - 300hz range. Most are huge if you are looking at FLHs. Indeed, ultimately concluding that my old 'subs', i.e. low tuned ML-pipe horns loaded with low Fs, Qts, high Vas dual 15' performed better overall than the ~34'H x 60'W x 48'D 70 - 500 Hz expo compression horns they replaced. The efficiency loss proved academic in reality for my SPL needs and the lack of the slight 'pinching' of the horn's 1:1 CR throats completely ameliorated what I initially considered a tragic loss when I was forced to sell them in a 'fire sale' many years ago. These are quite large to extend to 16 Hz, but the dual drivers work fine down to 70 Hz in a 3 ft^3, 0.7 Qtc sealed cab, i.e. the horn's compression chamber I used, so a system type to consider IME, though you may want a four square design if really high efficiency is desired. GM Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents. |
RE: Midbass/Upper Bass help, posted on May 13, 2010 at 09:23:14 | |
Posts: 3839 Joined: December 6, 2001 | I don't worry about the dips but years ago KenL added a tapering stub to the 'top' of the front chamber and produced this graph using an 8' Eclipse polycone woofer - said it would shake his garage (I think Ken wanted to patent the idea) - baffle and reflector angle also influence the possibility of dips. I once added a short damped stub to an 18' test coupler and it improved that toy's graph KenL's K8 Karlson Evangelist |
RE: Midbass/Upper Bass help, posted on May 13, 2010 at 09:30:51 | |
Posts: 590 Location: Georgia Joined: April 26, 2000 | The response looks good! By 'stub', do you mean the 'tophat' chamber you showed me ages ago? I don't remember nor can find any plots you may have sent along with it. GM Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents. |
RE: Midbass/Upper Bass help, posted on May 13, 2010 at 09:59:51 | |
Posts: 3839 Joined: December 6, 2001 | Ken had that stub attach at the top, it ran back the depth of the cabinet then down the back to a point (like BIB in that aspect) - I don't believe it needed to be that long (?) being lazy and poor carpenter I just added a 20 liter rectangular section at the top of an 18' coupler with 80 liter rear chamber - looking back it might work just to extend the typical 10 degree board 'upwards' beyond the top then just bend that back to the cabinet's depth. Maybe a simple perpendicular board will work in some cases where high frequencies aren't needed. Karlson expressed in patent 3540544 that off axis response could be improved by a system of reflectors - maybe that's true - I'd think some experimenting with pink noise and RTA would be helpful to adjust for minimum dips - then make smooth curve version reflector. Would you say its possible for an improperly focused top reflector to intensify ground-plane dips? or is that more a function of dimensions versus angles? Karlson Evangelist |
RE: Midbass/Upper Bass help, posted on May 13, 2010 at 10:15:42 | |
Posts: 590 Location: Georgia Joined: April 26, 2000 | Dunno, it appears to be acting as another resonant chamber to fill in nulls, so its path-length and CSA would be determined by the base K's response and since the Ken's 18' is probably tuned lower it makes sense for it to be longer/bigger. Well, the more reflections that leave the K slot, the better its power response will be.... GM Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents. |
RE: treading similar waters, posted on May 13, 2010 at 14:57:56 | |
Posts: 98 Location: Chicago Joined: February 19, 2010 | Josh - Are you going active or passive on the crossovers? I'm going active (hopefully 4-way) with two separate active crossovers (a 2-way feeing into a 3-way), I'd rather not add another speaker because that would mean another amp and active crossover or trying to experiment with building a passive. |
RE: treading similar waters, posted on May 13, 2010 at 15:26:21 | |
Posts: 98 Location: Chicago Joined: February 19, 2010 | GM - Would a ML-TQWT work to cover the 100-600Hz range? I've never seen one used this way. I've mostly seen them in full-range driver or with a tweeter. Do you have any examples you can point me to? I'd probably want to fold it (could I fold it more than once?) so I can place my horn and tweeter on top to get a good listening height. |
RE: treading similar waters, posted on May 13, 2010 at 16:41:42 | |
Posts: 820 Location: NJ/NYC Joined: August 3, 2001 | Active. I am using a DEQX for xo duties. Amps..well I have a few and some to come. ---------------- 'When Khruschev said 'we will bury you' I don't think he meant with surplus parts.' zacster |
RE: treading similar waters, posted on May 13, 2010 at 17:01:32 | |
Posts: 590 Location: Georgia Joined: April 26, 2000 | It could be made to work same as a reflex, but if you don't want sealed, then with a horn on top and a TH on bottom, I recommend a max flat impedance TL as the highest SQ choice. GM Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents. |
two 8s, posted on May 14, 2010 at 02:51:01 | |
Posts: 6135 Joined: June 17, 2000 |
RE: two 8s, posted on May 14, 2010 at 09:25:15 | |
Posts: 3839 Joined: December 6, 2001 | NICE! - in their literature, why might Eminence's 16 ohm version have a smoother graph than 8A? does it have any overhang? Karlson Evangelist |
RE: two 8s, posted on May 14, 2010 at 09:59:29 | |
Posts: 98 Location: Chicago Joined: February 19, 2010 | Wow - that plot looks perfect. I'll draw this up in SketchUp and post it, but I have a few questions about the model. I'm new to hornresp (and I only have a Mac), so forgive me if my questions or assumptions seem basic. Here's what I gather from the parameters: Exponential curve 101 Hz cutoff Length 1.48 meters (in 1/2 space) Mouth 10,000 sq cm The throat area is 80 cm ??? (that seems small for two drivers). Or is that 80 cm per driver? Would this two 8' driver horn work in 1/4 space? I'm planning to use this in a basement with good concrete walls under plywood. |
free pair 1950s karlsons for 12in., posted on May 14, 2010 at 14:31:01 | |
In S WI. Come get them. Nice cabs not crap. |
RE: two 8s, posted on May 14, 2010 at 15:24:12 | |
djk Manufacturer | 'NICE! - in their literature, why might Eminence's 16 ohm version have a smoother graph than 8A? does it have any overhang? ' Don't know, could be a misteak (sic). Will be different on a horn anyway. Driver has 3mm overhang on coil, looks like it could play 130dB/40V without running into x-max problems. |
RE: two 8s, posted on May 14, 2010 at 15:42:45 | |
djk Manufacturer | I made a misteak (sic) in the Sd, now corrected. Each throat is 80 sq cm, about a 3:1 compression ratio. Horn could be smaller if actually radiating into 1Pi (1/4 space). In reality that would be with the mouth flush in the wall right on the floor. How small? With a 200 sq cm throat per driver the total mouth could be only 5000 sq cm, the length from the driver mounting plane to the mouth about 75cm, quite small for a 100hz horn. Back volume per driver about 4L |
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RE: two 8s, posted on May 14, 2010 at 19:40:16 | |
green heron Audiophile Posts: 98 Location: Chicago Joined: February 19, 2010 | I sketched up the two scenarios in Illustrator. Does the throat look all right to you at 160 sq cm combined? I made the mouth square for simplicity. I still need to see where the exponential curve falls at the mouth and adjust the width and height. |
RE: two 8s, posted on May 14, 2010 at 20:05:17 | |
GM Audiophile | The drivers are firing into a 700 cm^3 filter chamber (Vtc) which in turn is loading the throat, so while it technically has a ~2.74:1 CR, it's acoustically buffered somewhat. Note that for prosound apps up to ~3:1 is considered acceptable. FWIW, I've experimented with cone drivers with up to ~10:1 same as some 1' exit horn drivers use and for HIFI apps it wasn't a problem since efficiency is so high, though it's impractical from a usable gain BW POV without a comparable phase plug. GM Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents. |
B&C 12PE32, posted on May 15, 2010 at 03:37:02 | |
djk Manufacturer | I guess it would be much simpler to go with a single 12. |
RE: B&C 12PE32, posted on May 15, 2010 at 04:45:57 | |
green heron Audiophile Posts: 98 Location: Chicago Joined: February 19, 2010 | Could you run the 12' B&C in hornresp as a straight walled petal horn in 1/4 space? (Sorry, I really need to borrow a Windows computer to run hornresp myself.) Does anyone know if a 16-sided petal horn would be preferable to a 4-walled conical? |
1Pi, posted on May 15, 2010 at 11:36:11 | |
djk Manufacturer | How are you going to provide 1Pi loading? Round horns are usually operated in 4Pi, freestanding. 2Pi would be flush in a wall, 1Pi would be a half-circle, flush in the wall, where it joins the floor. If you make a freestanding round horn it looks OK with a 20000 sq cm mouth (80cm radius, not dia), and an axial length of about 107cm vs 69cm on the rectangular 1Pi horn. |
RE: 1Pi, posted on May 15, 2010 at 12:12:24 | |
green heron Audiophile Posts: 98 Location: Chicago Joined: February 19, 2010 | A 5' wide horn would be impossible to time align with the other drivers, so I'm definitely better off going with a square conical or expo curve in 1/2 space. |
RE: Midbass/Upper Bass help, posted on May 15, 2010 at 13:13:29 | |
Posts: 3839 Joined: December 6, 2001 | here's ~groundplane of 15' Karlson with M151 vs same speaker in RCA-Fan V-vent reflex- there's tradeoffs - the Karlson has more output over a certain region plus less than 1/2 the cone excursion of the reflex for perhaps a 9dB dynamic advantage - if the driver doesn't compress much Karlson Evangelist |
RE: 1Pi, posted on May 17, 2010 at 13:38:35 | |
Posts: 98 Location: Chicago Joined: February 19, 2010 | Do you see any problem with these parameters using an EV 15L (I already have a couple of them)? It holds up pretty well from 100 to 600 Hz. |
RE: 1Pi, posted on May 18, 2010 at 06:04:10 | |
Posts: 6135 Joined: June 17, 2000 | That looks good, and you have the drivers. I would try it (if you don't mind it being 48' deep with the driver). |
RE: two 8s, posted on May 26, 2010 at 07:04:09 | |
Posts: 98 Location: Chicago Joined: February 19, 2010 | I decided to build some 16 sided 100 Hz conical horns driven by a pair of EV 15Ls. I think they look pretty good, even in full space. Here are the specs: L = 90 cm Mouth = 80 cm Throat = 21 cm I already calculated all of the angles and started cutting. I'll post my progress here: diyfirefly.blogspot.com |
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