davewantsmoore Posted August 11, 2021 Posted August 11, 2021 On 06/08/2021 at 10:36 AM, EHT007 said: it depends on If you play around with a simulator, the membrane is probably the biggest parameter... They all matter, but the range of practical cabinet depths, and flow resistance from the absorber, that you can use, is limited..... where as you can vary the membrane a lot more. As you noted the bandwith can get quite narrow when highly tuned.... in practise, if not building an exact published recipie (where the materials will need to be exact) .... then the best way to go is build -> measure -> tweak -> repeat. ... but the absolute most important thing is placement, as this affects the efficiency of coupling with the sound (just like how the position you measure from is also makes a huge difference). 1
EHT007 Posted August 17, 2021 Author Posted August 17, 2021 Anyone building LIMPs take care if your placing it in corner. Better idea would be to make it sit flush with walls. Placing thick wool blanket over the pine has reduced RT30 by 90ms! At 200hz. 3
Decky Posted August 17, 2021 Posted August 17, 2021 What would Helmotz say if he figures that you are using his resonator...
EHT007 Posted August 17, 2021 Author Posted August 17, 2021 1 hour ago, Decky said: What would Helmotz say if he figures that you are using his resonator... I think he would resonate well with it.
EHT007 Posted August 17, 2021 Author Posted August 17, 2021 (edited) Pic 1. No Limps & 1 Limps Pic 2 1 Limps & 2 Limps Only main speakers, no subs. Less variables. Edited August 17, 2021 by EHT007 1
Steffen Posted November 15, 2021 Posted November 15, 2021 On 17/8/21 at 6:45 PM, EHT007 said: Anyone building LIMPs take care if your placing it in corner. Better idea would be to make it sit flush with walls. Yes, it should be close to the wall for maximum efficiency, not spaced away. The membrane should be facing the wall (not the room), with just a few centimetres distance. That’s where the sound pressure is the largest. 1
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