HD215 with combined chamber. |
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Crazy Dane
Registered User Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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Posted: 16 December 2018 at 8:50pm |
Hi Guys.
Quick little question about the HD15. If i was to make a dual version, side by side like a Turbosound TSE215, would it then have any effect to make it with a combined chamber for both drivers, instead of seperate chamber for each driver? Also, how much would it affect the performance if i made the cab 20cm deeper, and at the same time changed the curvatory of the horn flare so it matches the 20cm extra depth of the cap? Regards... Frank
Edited by Crazy Dane - 16 December 2018 at 8:51pm |
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Best regards... Frank
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Crazy Dane
Registered User Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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Best regards... Frank
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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Having the drivers share the same chamber goes well enough but if something bad happens to one driver the other is more likely to follow than if they were in separate chambers. Having them in separate chambers shouldn't be much of a constructional problem and personally would leave a panel in there anyway, to function as bracing. Increasing the depth, lowers the tuning of the cabinet by two means, increased horn length and chamber volume, meaning the lower usable limit and the upper usable limit shift down. The tuning in relation to the horn mouth changes, so it's likely the frequency response changes as well. It's best if you simulate this before building anything.
Edited by mobiele eenheid - 17 December 2018 at 12:25am |
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Dub Specialist Sound
Old Croc Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4873 |
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tbh im not in favour of same chamber for drivers
as been said above |
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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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Crazy Dane
Registered User Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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Just dusted of an old design project i made som years ago. Just for fun...
It started out as a tripple HD15, but i have made some changes to it now :) Separate chambers for each driver, instead of one large chamber. Bigger chambers and deeper cab with longer flare, compared to HD15. Maybe someone has the time and desire to make some sims of the design? Got two drivers i wanted to try out. PD 154 and RCF LF15N401. Anybody up for it?? :D |
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Best regards... Frank
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Crazy Dane
Registered User Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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Off course, plenty of bracings in the horn mouth 🙂
Havent finished that part yet.
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Best regards... Frank
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Crazy Dane
Registered User Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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I have been reading and reading aaaand reading.
And now i have come to that conclusion that i should just build them as they are.. Standard HD15. But...! I would like to make the flare with 3 straight sections instead of a curve. So after alot of failed Google searching, i found some partial drawing of a plan regarding the 3 piece flare. From those, i have made my own drawings. Can anybody confirm that my findings are correct and that it will work like the original HD15? There are small chamber volume differences, and also small differences in the throat. Am i good to go? Pictures here: And last but not least.. I am trying to choose between PD154 and RCF LF15N401. They will cost me the same, so wich driver would be the superior choice? Best regards Frank
Edited by Crazy Dane - 20 December 2018 at 11:45pm |
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Best regards... Frank
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munkey
Registered User Joined: 17 August 2011 Status: Offline Points: 300 |
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https://forum.speakerplans.com/hd15-driver-sims_topic2617.html
Might be of some help. The link are broken and you need to click the images
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the midtops!
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Crazy Dane
Registered User Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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Would not say that it helps alot 🙂
A Sim does not tell much about how the sound is. But I can almost figure it out, that the PD will be more harsh and have more attack. I have used it in some Cubo 215 cabs some time ago. Very Hard hitting!
Edited by Crazy Dane - 21 December 2018 at 6:34am |
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Best regards... Frank
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corell
Young Croc Joined: 19 August 2013 Location: Berlin Status: Offline Points: 1161 |
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Both Chassis have to low qes for a frontchamber of that size. Try going with somehting more "moderate" around 0,28-0,3.
18sound 15NLW9401 comes to mind. |
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Crazy Dane
Registered User Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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Pd154 is the recommended driver for this cab, and the Lf15n401 Sims almost the same.
But I will take a look at what you recommend also 🙂
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Best regards... Frank
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corell
Young Croc Joined: 19 August 2013 Location: Berlin Status: Offline Points: 1161 |
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i know, but imo the "original" Hd15 is not a nice cab at all. it has a brutal and unpleasant sound to me.
Same as every low qes driver in a BPH, after simming and hearing quite some. |
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