Pd 1850 tuned lower? |
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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You clearly havent got a clue or are rather miss informed. I ran 8185 loaded cubo's built by bee from 38-80hz and they destroyed many bigger boxes ive had. 1850 loaded cubo's would rock a mobile rig and they don't benifit from group coupling is a bonus too. |
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prestigedjsdk
Registered User Joined: 17 December 2013 Status: Offline Points: 77 |
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If you look at the diagram with the void v1000 which is almost identical to the pd 1850 ts. You will see that it starts to deliver its sound at 110hz and up. Which is not sub duty, its peak is at 125hz an lower than 85hz there is no power in it really. at 45hz it is 4 db´s lower then 18lw1400. How is that better then everything else?
http://www.freespeakerplans.com/bass-cabinets/11-cubo-18
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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I dont know where that plot comes from maybe the Sun or the Mirror but in the real world if you run a cubo past 120hz it will honk and sound awfull.
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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sorry but this is rubbish, the cubo extended loaded with the 1850 or the 1852, drop to 35hz and are good up to 90ish past 100 and they get a bit honky. (driver magnet in horn) (driver magnet in chamber)they play to 120hz but only drop to 40hz.... its a trade off.... ps.... the graph showing a driver only playing to 85hz was a v1000's, and were from the 3rd prototype version, not the published version. The published version is even better.....
Edited by bee - 09 July 2014 at 3:50pm |
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https://www.elements-audio.com
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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the v1000, and pd1850 ts parameters are not even close..... this is a great example of why you should take specs with a pinch of salt, and actually test drivers and use your ears, and full rta them....
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https://www.elements-audio.com
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TONY.A.S.S.
Old Croc Joined: 21 February 2007 Location: United Kingdom Status: Offline Points: 6878 |
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Surely, the Horn is the Horn and there is not much you can do to lower frequency, apart from make the Horn a lot larger (with the given speaker). It might be confusion over terminology, but you can only tune a reflex enclosure.
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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PD1850 vs Void V1000
Fs 33.15 Hz Fs 34.53 Hz Re 5.22 Ω Re 5.5 Ω Qms 15.42 Qms 7.63 Qes 0.24 Qes 0.22 Qts 0.24 Qts 0.215 Le 1.33 mh Le 1.18mh L2 2.45 mh L2 2.20mh R2 5.3 Ω R2 !!!!!!! Vas 203.84 litres Vas 201.7 litres Mms 215.24 g Mms 226.23g Sd 1164.16 cm2 Sd 1230 cm2 Cms 107 µm/N Cms 93.89 µm/N BL 30.99 T/m BL 34.8 T/m Xmax 11.05 mm Xmax 10.5 mm Vd 1.28 litres Vd !!!!!!! Ref. Efficiency 2.88% Ref. Efficiency 3.62% Edited by bee - 09 July 2014 at 11:53pm |
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https://www.elements-audio.com
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corell
Young Croc Joined: 19 August 2013 Location: Berlin Status: Offline Points: 1161 |
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are these specs measured by you ben?
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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both taken from data provided by pd and void....
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https://www.elements-audio.com
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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longer horn and horm mouth = lower response. but driver may not be able to take it.... would need to sim... then build and measure... increasing horn length to 3 meters, the cab drops to 35hz, but the response is very peaky. To smooth out response more changes are needed.
Edited by bee - 09 July 2014 at 5:55pm |
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https://www.elements-audio.com
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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https://www.elements-audio.com
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patryk1305
Registered User Joined: 13 December 2012 Location: United Kingdom Status: Offline Points: 488 |
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Void Specs are not correct or is it just me?
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