A Thread for those interested in PPSL enclosures - Page 10

hawkson · 09:25 AM

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revboden · 27th May 2011, 10:40 PM

Quote:

Originally Posted by tb46

Hi revboden,

Sorry I didn't make myself clearer, maybe this will help:

Regards,

Yes, that helps. I must build two of these and test to see if the back reflections /top-to-bottom, are positive or negative in-room. I suspect all energy being reflected out is better but you never know with physics...

Cheers,
rev.

hawkson · 28th May 2011, 02:17 AM

Is the PPSL design feasible with 2 LMS Ultra 5400 or is 'too much'

revboden · 28th May 2011, 02:36 AM

Quote:

Originally Posted by hawkson

Is the PPSL design feasible with 2 LMS Ultra 5400 or is 'too much'

unless your room is the size of a medium sized theater... too much? yes.

hawkson · 28th May 2011, 02:47 AM

huh, approximately how big would a ppsl be with 2 LMS Ultra 5400s?

hawkson · 28th May 2011, 03:18 AM

Huh,

Well, I have 2 5400 Ultra LMS and I don't know what I should do with em. Should I only make a 1 sealed?

tb46 · 28th May 2011, 12:49 PM

Hi hawkson,

Just a quick simulation:

Regards,

GM · 28th May 2011, 01:47 PM

Quote:

Originally Posted by hawkson

Is the PPSL design feasible with 2 LMS Ultra 5400 or is 'too much'

'Too much' is an individual's choice. If I had a house capable of handling such output without having it collapse around/on me, a pair of DTS 'wannabes' and a few kW would be just about right for the dynamic headroom/low distortion/BW I'd want for some movies, games: AVS Forum - View Single Post - Top 5Hz-15Hz BluRey movies

GM

hawkson · 28th May 2011, 03:47 PM

Thanks TB46. The graph you posted seems underwhelming. I am not sure I am reading it right, but LMS ultra 5400 achieving only 90 dbs at 20hz, is that right? BTW< I have Lab Gruppen 14000 powering these.

GM, thats the LMS Ultra 5400 series 2? I believe I have an older version of the lms 5400...

GM · 04:08 PM

Dunno, it's whatever someone posted awhile back: ~19 Hz Fs, 0.31 Qts, 235.5 L Vas

GM

edit: hmm, they are somewhat different than Ricci's, but don't know which specs are earlier or if his are measured........

27th May 2011, 09:21 AM	#91
hawkson diyAudio Member Join Date: Apr 2011	edit, save for later Last edited by hawkson; 27th May 2011 at 09:25 AM.

28th May 2011, 04:06 PM	#100
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Dunno, it's whatever someone posted awhile back: ~19 Hz Fs, 0.31 Qts, 235.5 L Vas GM edit: hmm, they are somewhat different than Ricci's, but don't know which specs are earlier or if his are measured........ __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents. Last edited by GM; 28th May 2011 at 04:08 PM.

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28th May 2011, 02:17 AM	#93
hawkson diyAudio Member Join Date: Apr 2011	Is the PPSL design feasible with 2 LMS Ultra 5400 or is 'too much'

28th May 2011, 02:47 AM	#95
hawkson diyAudio Member Join Date: Apr 2011	huh, approximately how big would a ppsl be with 2 LMS Ultra 5400s?

28th May 2011, 03:18 AM	#96
hawkson diyAudio Member Join Date: Apr 2011	Huh, Well, I have 2 5400 Ultra LMS and I don't know what I should do with em. Should I only make a 1 sealed?

28th May 2011, 03:47 PM	#99
hawkson diyAudio Member Join Date: Apr 2011	Thanks TB46. The graph you posted seems underwhelming. I am not sure I am reading it right, but LMS ultra 5400 achieving only 90 dbs at 20hz, is that right? BTW< I have Lab Gruppen 14000 powering these. GM, thats the LMS Ultra 5400 series 2? I believe I have an older version of the lms 5400...