I'm not looking for sub in the sense that I need true 20Hz extension so maybe this isn't the proper forum. F3 in the 30s is fine for my purposes. Given that, will these work well?
Thanks,
Marty
| Model Number: | Xmax (inch) | Re | Vd (cu. in.) | Fs | Vas (cu. ft.) | Ref (%) | Qts | Qms | Qes | Vid |
| 3154 | 0.25 | 6.40 | 31.90 | 25.00 | 13.90 | 1.50 | 0.32 | 2.12 | 0.38 | 0.23 |
Thanks,
Marty
It's a low-Q and not-much Xmax. That means you'll need EQ, and won't have much room to boost the bass before running out of excursion.
Is there a particular reason you'd like to use a dipole LF system?
IMO, they throw away a LOT of output, in the name of something I'm not convinced is a good idea.
Chris
Is there a particular reason you'd like to use a dipole LF system?
IMO, they throw away a LOT of output, in the name of something I'm not convinced is a good idea.
Chris
Thanks for the input Chris, I don't need much output and I would need something small and dipole to match with the magnepan lrs+ i'm thinking about. Other than that, I have 8 of them and only have plans for 4. I can get the extension I am looking for with a big vented box but that won't work for my wife in the living room.
Take small woofers (6.5") and make vented cases as Stands for the LRS... It will be a good low extension for small Magnepan speakers.
Marty,
IMO, once you're down into the room's modal region, it's probably better to hand off to monopole subwoofers anyway.
However, if you're detemined to keep the system a dipole and/or want to cross high enough that the woofer(s) might be locateable, then ripole is an option. Really, it's just another way of folding an open baffle. Be careful of resonances developing - you might end up with peaks at/near the crossover frequency, and those will need to be attenuated. DSP is a good method here.
Chris
IMO, once you're down into the room's modal region, it's probably better to hand off to monopole subwoofers anyway.
However, if you're detemined to keep the system a dipole and/or want to cross high enough that the woofer(s) might be locateable, then ripole is an option. Really, it's just another way of folding an open baffle. Be careful of resonances developing - you might end up with peaks at/near the crossover frequency, and those will need to be attenuated. DSP is a good method here.
Chris
Your Maggies do EXCEPTIONALLY well in the upper midbass region so no need to augment them with ripole/dipole bass
What you want to do is naturally augment the response below 200hz down to 60hz or so with a dipole solution and then fill in the last octave with a sealed subwoofer system that will excite the room evenly. The above measurement and the countless shared experiences of Maggie owners about the difficulty of integrating them with subs fully supports my position……..its not a one part solution.
Your lower midbass/ upper bass application needs to be primarily a direct sound to match…….a ripole can do just that if you execute it properly……this CANNOT be placed on the ground plane and must be elevated so that the vector from the center of the front slot is equal distance to the seated ear height of the vector from the center of the LRS bass panel.
Now the above gives you the space below the ripole section for a sealed driver…..two opposed would be better to excite as many modes as possible.…..a pair of 8’s would work very well. It’s important to remember how the acoustic suspension alignement works with room gain……..the 2nd order rolloff generally winds up becoming a wonderful first order with around 6db of room gain.
The IDEAL solution here would be to manage all of this with a 2x4 Minidsp now having 4 discreet channels at your disposal……two for the suspension and two for the ripole. A simple coil /1st order highnpass can be calculated and placed on the Maggie input to cut the low end below 250hz which would be a HUGE improvement to the rest of the panel‘s non linear behavior from trying to produce low bass.
What you want to do is naturally augment the response below 200hz down to 60hz or so with a dipole solution and then fill in the last octave with a sealed subwoofer system that will excite the room evenly. The above measurement and the countless shared experiences of Maggie owners about the difficulty of integrating them with subs fully supports my position……..its not a one part solution.
Your lower midbass/ upper bass application needs to be primarily a direct sound to match…….a ripole can do just that if you execute it properly……this CANNOT be placed on the ground plane and must be elevated so that the vector from the center of the front slot is equal distance to the seated ear height of the vector from the center of the LRS bass panel.
Now the above gives you the space below the ripole section for a sealed driver…..two opposed would be better to excite as many modes as possible.…..a pair of 8’s would work very well. It’s important to remember how the acoustic suspension alignement works with room gain……..the 2nd order rolloff generally winds up becoming a wonderful first order with around 6db of room gain.
The IDEAL solution here would be to manage all of this with a 2x4 Minidsp now having 4 discreet channels at your disposal……two for the suspension and two for the ripole. A simple coil /1st order highnpass can be calculated and placed on the Maggie input to cut the low end below 250hz which would be a HUGE improvement to the rest of the panel‘s non linear behavior from trying to produce low bass.
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