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Anybody have plans for the G-Sub but 15"?

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JonB67 View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JonB67 Quote  Post ReplyReply Direct Link To This Post Posted: 17 September 2019 at 9:07am
Why would that be? 

Its a much smaller cab, with a noticeable reduction in internal volume. Can the more complicated port and more heavily recessed baffle really do that much?
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insguy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote insguy Quote  Post ReplyReply Direct Link To This Post Posted: 05 November 2019 at 4:02pm
Originally posted by Dub Specialist Sound Dub Specialist Sound wrote:

Ive built 100s of boxs , p-audio will piss over standed plan 15in g-sub



Did you put any insulation in this or just the braces?
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Dub Specialist Sound View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Sound Quote  Post ReplyReply Direct Link To This Post Posted: 05 November 2019 at 10:21pm
tbh both above..down to what you prefer..all box must be braced, standard procedure
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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valve head777 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote valve head777 Quote  Post ReplyReply Direct Link To This Post Posted: 05 November 2019 at 11:08pm
Sorry for asking a silly question as this thread is about 15's, but Dub, do you have plans for the p-audio 18 reflex? I really want some double 18's because I'm tempted to move away from scoops (most sounds begining to look/sound the same.)..

Edit... Grammar đŸ˜‚


Edited by valve head777 - 05 November 2019 at 11:09pm
Freedom of choice, choice of freedom.
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concept-10 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote concept-10 Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2019 at 5:18am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2019 at 8:20am
The first dual 18 P-audio design absolutely doesn't have enough port area. The second one is a step in the right direction but when using drivers like the 18sw100 I would even prefer more port area.
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APW View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote APW Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2019 at 10:09am

Have you modelled your driver in the box?

Using the first driver listed (SD1801700EL) on the first p.audio PDF the air speed through the four ports is about 0.15 Mach, anything below 0.2 is considered OK



Edited by APW - 06 November 2019 at 10:23am
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JBK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JBK Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2019 at 11:11am
Back to OP / original question, this plan is pretty popular for reggae sounds in france
We use it (1 above 2 scoops, usually in stacks of 4 scoops)) loaded with L15P530, crossed around 80/200
They kick well and sound warm (I've always prefered the warm sound of reflex over the dryer sounding bph designs often used in kick/upper bass, it suits roots / old school tune well I think, maybe less transparent), also I find them pretty sensitive, no need for enormous amps to make them sing, not that this is very subjective, I've never done a direct comparaison against another 215 reflex though.


Edited by JBK - 06 November 2019 at 11:13am
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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2019 at 7:21pm
Originally posted by APW APW wrote:

Have you modelled your driver in the box?

Using the first driver listed (SD1801700EL) on the first p.audio PDF the air speed through the four ports is about 0.15 Mach, anything below 0.2 is considered OK


When I model such a cab (around 180L, 37 Hz tuning) and using the 18SW100.
With 90V (1500 Watt) it reaches 50 m/s and then I'm even using a 35 Hz HP.



I have a PDF written up by someone from the Speakerfreakers group about port compression (can't find it atm). 
Conclusion is that bigger ports are needed.
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