Proiect subbass Planar Wave Horn cu c18-650EL

Radu · **Scris:** Dum Iul 29, 2007 4:45 pm

I was refering to the long version :twisted:

because, as I think that you've read above, I don't think that that short waveguide can give a considerable gain in sub and bas frequencies. I must say that I've heard 14 pieces of the long planar and they rock :twisted:

Although I think that 4 pieces of short planar would have a more pronouced kick as opposed to 4 pieces of bassreflex. :roll:

fabrizio971 · **Membru din:** Sâm Oct 14, 2006 9:10 pm **Mesaje:** 42

Radu scrie:

I was refering to the long version :twisted:

because, as I think that you've read above, I don't think that that short waveguide can give a considerable gain in sub and bas frequencies. I must say that I've heard 14 pieces of the long planar and they rock :twisted:

Although I think that 4 pieces of short planar would have a more pronouced kick as opposed to 4 pieces of bassreflex. :roll:

yes i have understand what you said, i know that you prefer the long version...and yes the kick in the short is more pronounced as a bass reflex.
to be clear you have 101 db @40hz with a short planar, it's a good result for me :twisted:

user eliminat · **Scris:** Dum Iul 29, 2007 8:55 pm

fabrizio971 scrie:

101 db @40hz

no way hoze :lol:

take a few minutes and think about why it is imposible to have 101 db @ 40 hz. As Radu said the pathlenght is too short to achive some significant increase of spl, and even so only in the kick zone. In the subbas zone you need something else to increase the spl :wink:

off course in a large room, placed in corner with the acustic coupling from the walls you could get that amount of spl...but it's hard for me to realise that it could be posible to achieve that amount of spl

fabrizio971 · **Membru din:** Sâm Oct 14, 2006 9:10 pm **Mesaje:** 42

fabrizio971 scrie:

Radu scrie:

I was refering to the long version :twisted:

because, as I think that you've read above, I don't think that that short waveguide can give a considerable gain in sub and bas frequencies. I must say that I've heard 14 pieces of the long planar and they rock :twisted:

Although I think that 4 pieces of short planar would have a more pronouced kick as opposed to 4 pieces of bassreflex. :roll:

yes i have understand what you said, i know that you prefer the long version...and yes the kick in the short is more pronounced as a bass reflex.
to be clear you have 101 db @40hz with a short planar, it's a good result for me :twisted:

this curves is for the short planar not the long planar take a look at this :roll:

user eliminat · **Scris:** Dum Iul 29, 2007 9:42 pm

for one piece to achieve that amount of spl it's hard to beleve. :roll:

Maybe the blue one is. It;s more plausible :lol:

Radu · **Scris:** Dum Iul 29, 2007 10:28 pm

I bet on whatever you want that with this sub ( without any processing, just the normal signal, like the signal driven in the speaker plotted ) you won't acheive 101 dB/1W/1m/40 Hz. It's impossible in that Volume for an 18" speaker to move such a quantity of air to obtain 101 dB at 40 hz from 1 W.
Just have in mind that Dynacord, for their planar give almost 7 dB to 40 Hz, and even with that gain, the F3 doesn't reaches 40 Hz. An they have a very big waveguide compared with this version. :roll:

I am very sure that that plot is incorrect because from what I see there is something like the bassreflex vent influencing the closed box response ( in another word said: how to estimate the frequency response of a closed if we would put it a vent - this is the ideea that's behind the bassreflex ): the closed box is in reality the bassreflex cab and the vent is in reality the waveguide. The ideea is wrong, so the plot is wrong. he reality is that in the upper range, at 100 Hz, is a gain of probably 3-4 dB, but under 70-80 Hz it acts like a normal bassreflex cab.
I wolud have said may more things, but I'm not on my free time

fabrizio971 · **Membru din:** Sâm Oct 14, 2006 9:10 pm **Mesaje:** 42

Radu scrie:

I bet on whatever you want that with this sub ( without any processing, just the normal signal, like the signal driven in the speaker plotted ) you won't acheive 101 dB/1W/1m/40 Hz. It's impossible in that Volume for an 18" speaker to move such a quantity of air to obtain 101 dB at 40 hz from 1 W.

I would have said may more things, but I'm not on my free time

yes but perhaps in MP

anyway, do you think that this speaker can work good with a short planar?
Imagine

Radu · **Scris:** Mar Aug 14, 2007 9:03 pm

From my opinion ( I've never tried that speaker plan ) it will work excelent

crossed between 90-150 hz ( the crossover frequency depend on taste: if you like the lows in the male voice to be heared in the subwoofers, than you can cross it at 150-160 Hz; but if you link only true sub frequencies you could choose a frequency between 70-90 Hz.

fabrizio971 · **Membru din:** Sâm Oct 14, 2006 9:10 pm **Mesaje:** 42

Radu scrie:

From my opinion ( I've never tried that speaker plan ) it will work excelent

crossed between 90-150 hz ( the crossover frequency depend on taste: if you like the lows in the male voice to be heared in the subwoofers, than you can cross it at 150-160 Hz; but if you link only true sub frequencies you could choose a frequency between 70-90 Hz.

ok but i have a problem with the 12" speaker, this speaker is not available in france, do you think that i can replace it with a c15 300 mb from Paudio?

Bogdan Luha · **Scris:** Mar Aug 14, 2007 10:44 pm

I don't think that c15 300 mb will work, maily beacause the volume is too small 47L.
I think that c12 300 mb will work really well.

fabrizio971 · **Membru din:** Sâm Oct 14, 2006 9:10 pm **Mesaje:** 42

pitbull_bog scrie:

I don't think that c15 300 mb will work, maily beacause the volume is too small 47L.
I think that c12 300 mb will work really well.

yes i made a little mistake i was talking about 12" and i wrote 15!! silly boy! :oops:

fabrizio971 · **Membru din:** Sâm Oct 14, 2006 9:10 pm **Mesaje:** 42

a new short planar from France i hope you will like it!!!

fabrizio971 · **Membru din:** Sâm Oct 14, 2006 9:10 pm **Mesaje:** 42

and a long version with a p audio c18 650el from France again!!

Rohan Csaba-(intel) · **Scris:** Lun Aug 20, 2007 9:34 am

nice beast`s

fabrizio971 · **Membru din:** Sâm Oct 14, 2006 9:10 pm **Mesaje:** 42

this planar from France is made with a RCF speaker:RCF LF 18G400
and it works good!!!

forumpoweraudio.ro

Proiect subbass Planar Wave Horn cu c18-650EL

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