tunning a ported box
07-14-2005, 02:11 PM
#1
50 Watt CAFz'r
Thread Starter
Join Date: Jun 2005
Posts: 56
Right know I hit decent spl# with my current box, which is tuned to 37hz, I called the manufacture and they gave me specs on a new spl box but they told me most people with my equipment tune to 50-55hz! I had a test done, between 42 and 47hz it was the loundest with a 44hz peak. However, I never went past 47hz because it started to lose db's! What should I do? retest! or tune to their recommended 50hz? This box they recommend is much bigger then the box I tested at to begin with.
Thanks
David
Thanks
David
07-14-2005, 08:31 PM
#3
50 Watt CAFz'r
Join Date: Apr 2004
Posts: 52
07-15-2005, 10:32 AM
#6
50 Watt CAFz'r
Thread Starter
Join Date: Jun 2005
Posts: 56
Alright lets say my car gets the most response at 44hz! What should I tune the port at?
The size box they want me to make is like 7.25cf, made out of inch thick mdf, I cant afford to make 4 or 5 of these boxes even though I know testing is my best bet. I just want to think everthying through so I get as close on the first try.
Thanks
David
[ July 15, 2005, 11:35 AM: Message edited by: dchow ]
The size box they want me to make is like 7.25cf, made out of inch thick mdf, I cant afford to make 4 or 5 of these boxes even though I know testing is my best bet. I just want to think everthying through so I get as close on the first try.
Thanks
David
[ July 15, 2005, 11:35 AM: Message edited by: dchow ]
07-15-2005, 06:48 PM
#8
Guest
Posts: n/a
^ 7hz? Always? Regardless of what the frequency is?
I'm not knee deep in the SPL world so I'm not disputing you - just seems kind of odd. If you look at it from a box point of view, one would tune 1/2 an octave below the resonant peak, so in this case 33Hz. Admittedly, that seems low for an SPL box but then 44Hz is kind of a low resonance too - must be a large vehicle.
Must be a case of the real world and theory not quite lining up [img]graemlins/dunno.gif[/img]
I'm not knee deep in the SPL world so I'm not disputing you - just seems kind of odd. If you look at it from a box point of view, one would tune 1/2 an octave below the resonant peak, so in this case 33Hz. Admittedly, that seems low for an SPL box but then 44Hz is kind of a low resonance too - must be a large vehicle.
Must be a case of the real world and theory not quite lining up [img]graemlins/dunno.gif[/img]
07-15-2005, 07:42 PM
#9
Originally posted by Dukk:
^ 7hz? Always? Regardless of what the frequency is?
I'm not knee deep in the SPL world so I'm not disputing you - just seems kind of odd. If you look at it from a box point of view, one would tune 1/2 an octave below the resonant peak, so in this case 33Hz. Admittedly, that seems low for an SPL box but then 44Hz is kind of a low resonance too - must be a large vehicle.
Must be a case of the real world and theory not quite lining up [img]graemlins/dunno.gif[/img]
^ 7hz? Always? Regardless of what the frequency is?
I'm not knee deep in the SPL world so I'm not disputing you - just seems kind of odd. If you look at it from a box point of view, one would tune 1/2 an octave below the resonant peak, so in this case 33Hz. Admittedly, that seems low for an SPL box but then 44Hz is kind of a low resonance too - must be a large vehicle.
Must be a case of the real world and theory not quite lining up [img]graemlins/dunno.gif[/img]
