Michael_Collins
Auditioning
- Joined
- Dec 8, 2003
- Messages
- 6
Hello All,
I've been reading about Sonotube subs as well as having looked at the various different designs on the Sonosub homepage link.
After looking at the designs, I've got a few questions and ideas that I'd like opinions on:
1) It looks like most sonotube subs are single port/single chamber or closed box design. Has anyone tried a dual port/dual chamber (6th order bandpass) design?
2) I've been playing with LspCAD from Adire.com and came up with a design that looks pretty good for In-room response, even thought the 1 M 2Pi space plot isn't all that great. Essentially, the in-room response is -3dB @ 13.5 Hz and 50Hz. At 20W the output is +/- 1dB 16-45Hz at an SPL of 102dB.
3) If I ran a Behringer EX1200 out of the LFE channel of my preamp, would it be better to use the LspCAD sub, or go with a couple of butt kickers on a platform?
4) Any better ideas to boost the SPL at those freqs? An Infinite Baffle design has been recommended to me, but I don't have the physical space to accomodate a design like that without upgrading the house right now (not within the budget constraints)
5) Will the Bass Expander EX1200 really work down to 10Hz? If so, what's the best way to extend my lower range @ High in-room SPL? I've got cone excursion problems with the Shivas, and the total volume of my box is starting to get huge as I up the driver size.....
Thanks for any feedback/opinions!
Michael
Here are the specifics about the design....
BANDPASS BOX TYPE 3
FilenameIn Room Flat Optimized.box
Rear box
Vol700.00 l
Qa30.0
Ql15.0
Fill0 %
Front box
Vol120.00 l
Qa30.0
Ql15.0
Fill0 %
Rear port
Length133.16 cm
Area324.29 sq.cm
Dia20.32 cm
Flange radiusinf.
Max dia20.32 cm
# ports2
Simulation of port non linearity ON
Res freq.13.50 Hz
Front port
Length6.88 cm
Area81.07 sq.cm
Dia10.16 cm
Flange radiusinf.
Max dia10.16 cm
# ports2
Simulation of port non linearity ON
Res freq.50.00 Hz
Driver
ManufacturerAdire Audio
ModelShiva 2
Filename
# drivers2
Extra mass0.0 g
Simulation of BL non linearity ON
Simulation of voice coil heating ON
Simulation of Cms non linearity ON
Double voice coil with
voice coils connected in parallell
Electrical connection of drivers : Sep. sources
Room and Cabinet
Roof height2.600m
Room depth10.210m
Room width3.960m
Speaker pos.X=3.000m Y=0.000m Z=0.750m
Meas. pos.X=2.13mY=0.80mZ=5.49m
Reflections from
Speaker backwall (0.19), Left side wall (0.19), Right side wall (0.19), Floor (0.36), Roof (0.36), Cabinet edges,
Response 1/3 octave smoothed
I've been reading about Sonotube subs as well as having looked at the various different designs on the Sonosub homepage link.
After looking at the designs, I've got a few questions and ideas that I'd like opinions on:
1) It looks like most sonotube subs are single port/single chamber or closed box design. Has anyone tried a dual port/dual chamber (6th order bandpass) design?
2) I've been playing with LspCAD from Adire.com and came up with a design that looks pretty good for In-room response, even thought the 1 M 2Pi space plot isn't all that great. Essentially, the in-room response is -3dB @ 13.5 Hz and 50Hz. At 20W the output is +/- 1dB 16-45Hz at an SPL of 102dB.
3) If I ran a Behringer EX1200 out of the LFE channel of my preamp, would it be better to use the LspCAD sub, or go with a couple of butt kickers on a platform?
4) Any better ideas to boost the SPL at those freqs? An Infinite Baffle design has been recommended to me, but I don't have the physical space to accomodate a design like that without upgrading the house right now (not within the budget constraints)
5) Will the Bass Expander EX1200 really work down to 10Hz? If so, what's the best way to extend my lower range @ High in-room SPL? I've got cone excursion problems with the Shivas, and the total volume of my box is starting to get huge as I up the driver size.....
Thanks for any feedback/opinions!
Michael
Here are the specifics about the design....
BANDPASS BOX TYPE 3
FilenameIn Room Flat Optimized.box
Rear box
Vol700.00 l
Qa30.0
Ql15.0
Fill0 %
Front box
Vol120.00 l
Qa30.0
Ql15.0
Fill0 %
Rear port
Length133.16 cm
Area324.29 sq.cm
Dia20.32 cm
Flange radiusinf.
Max dia20.32 cm
# ports2
Simulation of port non linearity ON
Res freq.13.50 Hz
Front port
Length6.88 cm
Area81.07 sq.cm
Dia10.16 cm
Flange radiusinf.
Max dia10.16 cm
# ports2
Simulation of port non linearity ON
Res freq.50.00 Hz
Driver
ManufacturerAdire Audio
ModelShiva 2
Filename
# drivers2
Extra mass0.0 g
Simulation of BL non linearity ON
Simulation of voice coil heating ON
Simulation of Cms non linearity ON
Double voice coil with
voice coils connected in parallell
Electrical connection of drivers : Sep. sources
Room and Cabinet
Roof height2.600m
Room depth10.210m
Room width3.960m
Speaker pos.X=3.000m Y=0.000m Z=0.750m
Meas. pos.X=2.13mY=0.80mZ=5.49m
Reflections from
Speaker backwall (0.19), Left side wall (0.19), Right side wall (0.19), Floor (0.36), Roof (0.36), Cabinet edges,
Response 1/3 octave smoothed