2 side-firing drivers in push/pull thoughts???

mclsound

Member
2007-09-16 9:20 pm
My goals are are a smaller/slimmer design for better wife approval(lets say) and putting as much LF in a single cabinet as possible.
Can you put 2 woofers crossed at say 50-70hz,ish on the side wired in a push/pull design to keep box size down yet give good bass for 2ch.I have searched and not seen any info on this type.I know all about clamshell and front to back etc. but not sure if this would work.
I can get about 9ft3 but need 3ft3 for midbass(2) and bracing,leaving around 6ft3.Most drivers will require 6ft3 for a single box for a Aura NS-18 so I was curious if this may work
Just a thought?
 
If size it's a limiting factor (not your wife :D) you can use a better adapted woofer for small internal volumes and use one or two ""one above the other"" as you stated, that's not a problem.
My goals are are a smaller/slimmer design for better wife approval(lets say)
You need a high WAF...
and putting as much LF in a single cabinet as possible.
You need a good driver. :D
Again size it's not a problem, and isobarics with woofers pairs can be smaller in size and more expensive.
 

mayhem13

Member
2008-09-22 4:37 am
Agreed.....smaller box req either a driver with higher motor strength or Isobaric. What you propose...push pull, while reducing distortion, results in a need for a larger box. There's often confusion on the topic....isobaric is not push/pull as the air space between the drivers needs to be physically seperate from the enclosure volume.
 
Let's see if I understand, you are using two Aurasound NS18 drivers (1 in the left speaker + 1 in the right speaker) in your set-up, side firing, plus a sub with two Aurasound NS18 woofers. Am I right?
Or the pair of subs separated from each other?! (1 sub/Aurasound NS18 + 1 sub/Aurasound NS18)
If true then your mains can be small(er) in size. As small as not to affect the quality of sound. I'm not addressing here active crossovers, amps, control and such...
LineSource posted this on the Mark Levinson/Beyma 18p80nd in his Daniel Hertz M1 $100K speaker, not long ago.
Beyma 12p80nd + TPL-150 - diyAudio

I think WAF in this case is high, just spell the name... or the money. :D :D
 
Last edited:
4.5ft³ = 127.43L
AURA SOUND NS18-992-4A, VB = 127.0 L, QTC = 0.928, F3=31.8 Hz (free field).
Note. Not advisable, the driver presents a peak of [email protected]/60Hz, unless you know what you are doing. It requires filtering and controlling amplification and frequencies. Might become a problem to match with the lower frequency subs in a bigger box unless they are independently controlled.
 

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  • AURA SOUND NS18-992-4A, VB = 127.0 L, QTC = 0.928, 88.7 dB2.83Vm..jpg
    AURA SOUND NS18-992-4A, VB = 127.0 L, QTC = 0.928, 88.7 dB2.83Vm..jpg
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mclsound

Member
2007-09-16 9:20 pm
It will be in 6ft3 by the time I lose my internal midbass box. and I will make 2 other cabs at 6ft3 also for the other 2....so yes on 1 sidefire/one cab per side of the room......
speakers were 2 for the price of one is why I have 4 and I had someone to pick them up so no shipping.
 
Most drivers will require 6ft3 for a single box for a Aura NS-18 so I was curious if this may work
Not in this case. :mad:

6ft³ = 169.90L
12.75w x 58h x 19.75d internal
(12.75in = 32.385cm, 58in = 147.32cm, 19.75in = 50.165cm)
(8.452 cubic feet = 239.34 liters TOTAL)

Aurasound NS18-992-4A 18" Subwoofer
Frame: 477mm (47.7cm = 18 25⁄32in)
Cut out: 426.4mm (42.64cm = 16 25⁄32in)
Depth: 287.1mm (28.71cm = 11 19⁄64in)

1. AURA SOUND NS18-992-4A, VB = 305.5 L, QTC = 0.707 (acceptable or ideal) :yes:
(305.5L = 10.789ft³)
2. AURA SOUND NS18-992-4A, VB = 197.6 L, QTC = 0.800 (+/-, not ideal) :xfingers:
(197.6L = 6.9782ft³)
3. AURA SOUND NS18-992-4A, VB = 169.9 L, QTC = 0.839 (bad) :down:

Hope this helps, now is up to you...
 

Attachments

  • 1. AURA SOUND NS18-992-4A, VB = 305.5 L, QTC = 0.707, le 0 dB correspond à 88.7 dB2.83Vm..jpg
    1. AURA SOUND NS18-992-4A, VB = 305.5 L, QTC = 0.707, le 0 dB correspond à 88.7 dB2.83Vm..jpg
    118.1 KB · Views: 100
  • 2. AURA SOUND NS18-992-4A, VB = 197.6 L, QTC = 0.800, le 0 dB correspond à 88.7 dB2.83Vm..jpg
    2. AURA SOUND NS18-992-4A, VB = 197.6 L, QTC = 0.800, le 0 dB correspond à 88.7 dB2.83Vm..jpg
    120 KB · Views: 99
  • 3. AURA SOUND NS18-992-4A, VB = 169.9 L, QTC = 0.839, le 0 dB correspond à 88.7 dB2.83Vm..jpg
    3. AURA SOUND NS18-992-4A, VB = 169.9 L, QTC = 0.839, le 0 dB correspond à 88.7 dB2.83Vm..jpg
    117.5 KB · Views: 95