Advantages of a standard 2-way reflex vs coaxial |
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citizensc
Young Croc Joined: 16 October 2015 Location: Perth,Australia Status: Offline Points: 532 |
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Posted: 25 February 2021 at 12:33pm |
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Hi
Simple questions but the answer eludes me. What is the advantage of going with a standard 2 way reflex cab when you can use a coaxial driver. For example why would yo go with an 12NDL88 + DE880tn + ME90 (448 pounds at blue aran) when you could get a 12CXN88 (439 pounds)? Advantages I can see with the coaxial: -More compact -Lighter -better vertical off axis response due to no difference in time arrival vertically off axis. -A true point source -slightly cheaper -Easier to build Advantages I see with the standard 2-way: -Slightly better horizontal off axis response due to using full sized wave guide and no interference from the cone of the woofer -'Looks normal' -potentially more arrayable if designed properly. Why are we not seeing coaxial speakers everywhere? Why are standard 2-way speakers still so popular? -Hugh Edited by citizensc - 25 February 2021 at 12:34pm |
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Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5172 |
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The biggest problem with Coaxial Speakers are the dips within the Frequency Response. Not even the Whizzer Cone excludes such a phenomenon within the mid band frequencies.
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Elliot Thompson
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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Real xmax is also lower 9/10 times, even if the specced xmax is relatively high. Its just in the design most of the times. Only real exception would be the bms tri-axial.
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Yes, in my experience, coaxials (rarely) have good bass response. Even the 15" versions. Ok if you are just looking for a decent mid/top, but not for going below 60/70Hz. |
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Earplugs Are For Wimps!
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citizensc
Young Croc Joined: 16 October 2015 Location: Perth,Australia Status: Offline Points: 532 |
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Is this just because its difficult to fit a proper wave guide to the HF? or something to do with the geometry of the cone being inferior to the flat baffle a horn flare would typically be flush mounted to?
By this, do you mean that coaxials don't typically have T/S parameters that are suited to good LF response or that in practice they don't produce the LF respond you would expect based on the T/S paramaters? The 15FHX76 has an Fs of 40hz and a Qts of 0.43 for example, I cant imagine it would be difficult to get bass out of it. |
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Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5172 |
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It is more to wards blockage (a smaller loudspeaker sitting directly over larger speaker's voice coil) or, interference (The Whizzer cone creating lobes at certain frequencies) pending on the coaxial design scheme. Such methods creates problems in the Midrange and High Frequencies.
Tannoy's concentric method is the best you can achieve without serious issues in the frequency response. However, the costs are out of reach for the majority.
Many at the time,
sacrificed sound quality for higher sound pressure levels while, trying to achieve a single point of source sound. This is where Coaxial Loudspeakers fit the criteria. Coaxial Loudspeakers have been in existence beyond 80 years. So I am looking at Coaxial Loudspeakers tonal characteristics overall on how they perform within the midrange region. Best Regards,
Edited by Elliot Thompson - 26 February 2021 at 1:48pm |
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Elliot Thompson
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MarjanM
Old Croc Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7810 |
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You need to hear the BMS triax. You will ask where the sub is hidden. |
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Yes - and nice price tag as well! My experience is mainly with the "local" products, ie Beyma & DAS. Like I say, what I've heard, has been disappointing. And Tannoys, etc. - yes, a different world. |
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Earplugs Are For Wimps!
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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Nexo brought out a whole new range of coax topcabinets. They probably use something like the 12CXN88 with a different horn. That 12CXN88 does look nice in the Voice Coil magazine test.
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APC321
Young Croc Joined: 24 August 2013 Location: West Midlands Status: Offline Points: 680 |
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When I have used coaxial drivers in venues (mid-tops with separate bass bins), the "point-sourceness" of the coaxial driver really shines if it can be flown at a steep angle (maybe 30 degrees) high (say 3.5m) above a dance floor.
The conical radiation pattern gives good coverage, and would be my box of choice for this application, compared to a standard 2 way box of the same quality. However when I have used coaxial drivers in rectangular rooms of restricted ceiling height (say 2.5m) I have found that the practical effect of the conical radiation pattern is that good hf coverage is diificult to obtain. In this application I would choose a standard 2 way box over a coaxial box of the same quality. Edited by APC321 - 26 February 2021 at 7:52pm |
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JonB67
Young Croc Joined: 22 April 2016 Location: UK Status: Offline Points: 1376 |
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So it digs deep enough, but does it do a nice midrange at the same time?
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I-shen Soundboy
Registered User Joined: 21 December 2016 Location: Big Smoke Status: Offline Points: 375 |
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BMS 6.5" coax monitors. Real compression driver lovelyness.
They do sound bloody amazing, assuming you have bass duties covered elsewhere. Stunning highs. Speaker sexyness aside, this gives me a much smaller box than a horn + cone combo, which means it can be used in more places. It's a 9 inch cube, which isn't large at all. Currently rocking a home studio until I can use it on a DJ again... Edited by I-shen Soundboy - 26 February 2021 at 10:56pm |
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