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Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Sun Dec 16, 2012 11:24 am
by jzagaja
This is my Titan 48:
http://youtu.be/u73lNro99cY
driven with Beyma Power 15 and GDN-38-550-8-AE (Qt=0.9). Do you see air leaks on impedance plot?
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Sun Dec 16, 2012 12:45 pm
by Bill Fitzmaurice
No obvious air leaks, but a few resonances, probably from using OSB, which is not suitable for speaker cabinets.
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Sun Dec 16, 2012 12:48 pm
by jzagaja
True - I wanted to have something light and quick on New Years Eve. 40Hz dip is too strong compared to your samples?
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Sun Dec 16, 2012 1:02 pm
by Bill Fitzmaurice
jzagaja wrote:True - I wanted to have something light and quick on New Years Eve. 40Hz dip is too strong compared to your samples?
Not necessarily. I didn't test mine with that driver.
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Sun Dec 16, 2012 1:06 pm
by jzagaja
Simulation. Impedance of real speakers is shifted toward lower frequencies.
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Mon Dec 17, 2012 9:16 am
by netwerks
jzagaja wrote:True - I wanted to have something light and quick on New Years Eve. 40Hz dip is too strong compared to your samples?
OSB...light????
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Mon Dec 17, 2012 12:02 pm
by jzagaja
Ok. maybe not light but certainly a lot cheaper to experiment
- I wanted to see how my drivers behave.
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Thu Dec 20, 2012 11:09 pm
by Rick Lee
netwerks wrote:OSB...light????
Actually, only 2 lbs. heavier than regular plywood.
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Thu Dec 20, 2012 11:37 pm
by Lastcat
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Fri Dec 28, 2012 8:04 am
by jzagaja
I sealed internal walls and covered OSB with felt. Impedance has changed as you can see because I removed 6mH coil.
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Fri Dec 28, 2012 8:31 am
by Bill Fitzmaurice
What 6mH coil?
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Fri Dec 28, 2012 8:37 am
by jzagaja
I disassembled my Beyma Power 15 from aperiodic enclosure (5 cu. ft), put in Titan48 and forgot remove low pass filter. In comparison to closed box bass is more felt on body but this is ca. 70Hz not 40-50Hz
We'll see on Monday. It vibrates quite a lot
Re: Titan 48 (OSB panel), Beyma Power15, GDN-38-550-8-AE
Posted: Fri Dec 28, 2012 8:55 am
by jzagaja
It cost me no more than $50 plus woofer.
