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Read the Post in new Window Read the Post in Threaded view  Post #321: Reducing A/C Noise by RF at Ona on 2011-05-31 
Browse the content of the threads in new Window  Thread: Romy The Cat's new Listening Room in Audio Discussions  478 Replies 
Romy,You maybe thinking of your a/c problem backwards. In use, air conditioning vents become louder as the air speed and turbulence increase. Reducing the aperture of a vent can increase noise because a reduced aperture increases air flow spee...

Read the Post in new Window Read the Post in Threaded view  Post #94: Drive ULF Amp from Midbass Amp Output by RF at Ona on 2011-03-23 
Browse the content of the threads in new Window  Thread: Macondo’s lowest channel. in Horn-Loaded Speakers  150 Replies 
Romy,I might have overlooked something on your site but I understand that your ULF amp is driven directly by the preamp line stage. If that is the case, you may want to consider an old technique for integrating subwoofers and drive your ULF amp w...

Read the Post in new Window Read the Post in Threaded view  Post #86: One Bass Horn or Two – for Oxric by RF at Ona on 2011-03-13 
Browse the content of the threads in new Window  Thread: Macondo’s lowest channel. in Horn-Loaded Speakers  150 Replies 
Rakesh,Thank you for your kind remarks. I appreciate the close scrutiny you have given my previous post but I think you are at a stage of system design where many basics of your system should be considered and evaluated before the issues of my po...

Read the Post in new Window Read the Post in Threaded view  Post #73: Loudspeaker Proximity Coupling in Midbass & ULF by RF at Ona on 2011-03-10 
Browse the content of the threads in new Window  Thread: Macondo’s lowest channel. in Horn-Loaded Speakers  150 Replies 
I would like to suggest an alternative factor or explanation to your recent ULF/midbass findings.When you were chronicling the design and implementation of your midbass horns I was curious as to the effect of the very close placement of the two h...

Read the Post in new Window Read the Post in Threaded view  Post #305: Bravo Romy & carpenter … as for the joints by RF at Ona on 2010-09-19 
Browse the content of the threads in new Window  Thread: Macondo’s Midbass Project – the grown up time. in Horn-Loaded Speakers  455 Replies 
Congratulations on the construction and installation of your horns. May your pleasure at the results reward your effort and expense. I find their installed appearance even more geometrically striking than anticipated and I suspect now that some o...

Read the Post in new Window Read the Post in Threaded view  Post #274: Coupling vs Decoupling at Mouth End by RF at Ona on 2010-09-16 
Browse the content of the threads in new Window  Thread: Macondo’s Midbass Project – the grown up time. in Horn-Loaded Speakers  455 Replies 
[quote user="Romy the Cat"]  RF at Ona wrote:Personally, I think it debatable whether the mouth edge should be free or attached as there are desirable aspects to both approaches. If attached, it need not be attached with great pressure.  Robert, ca...

Read the Post in new Window Read the Post in Threaded view  Post #271: Weight bearing decoupling inches back from mouth end of horn by RF at Ona on 2010-09-15 
Browse the content of the threads in new Window  Thread: Macondo’s Midbass Project – the grown up time. in Horn-Loaded Speakers  455 Replies 
You can improve the vibration decoupling by lessening the weight on the horn mouth edge. There is no need for the edge of the horn mouth to bear a great deal of the weight of the heavy end of the horn, although that seems your current plan. Th...

Read the Post in new Window Read the Post in Threaded view  Post #253: Consider a pivoted ramp instead of dead-lift by RF at Ona on 2010-09-13 
Browse the content of the threads in new Window  Thread: Macondo’s Midbass Project – the grown up time. in Horn-Loaded Speakers  455 Replies 
From your recent posts it may be that you are already thinking along these lines but let me suggest an approach to the horn positioning anyway. I don’t think it is either necessary or desirable to vertically lift the full weight of each horn a...

Read the Post in new Window Read the Post in Threaded view  Post #17: Follow-up on Music Room Options by RF at Ona on 2007-10-20 
Browse the content of the threads in new Window  Thread: Building a new music room in Playback Listening  20 Replies 
Collin,I am pleased that you found my suggestions worthwhile. I approached the issue of your music room with two questions in mind:1- How to avoid the structural angle from interfering with the sound2- Would an enlarged room be worthwhile...

Read the Post in new Window Read the Post in Threaded view  Post #12: Consider Diagonal Placement/Hexagonal Form by RF at Ona on 2007-10-18 
Browse the content of the threads in new Window  Thread: Building a new music room in Playback Listening  20 Replies 
Collin,I would suggest that you abandon the idea of placing your speakers against the back wall with that reflecting/diffracting angle in front of the speaker(s). Such a structural intrusion would not be kind to the polar radiation pattern ...

Read the Post in new Window Read the Post in Threaded view  Post #6: Romy's Isobarik Loudspeaker by RF at Ona on 2007-05-30 
Browse the content of the threads in new Window  Thread: The inflatable speakers dumping and no only. in Audio Discussions  8 Replies 
Congratulations, Romy, I think you just re-invented the ISOBARIK loudspeaker. Although, Linn's Isobarik implementation of two drivers moving in parallel separated in a small chamber which would be nearly in constant volume (and pressure) couldn...

Read the Post in new Window Read the Post in Threaded view  Post #12: Grounding might be a factor by RF at Ona on 2007-05-29 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
Romy and friends, Reading about the sensitivity of your system to electrical power supply problems reminds me of the days when I used to make my own equipment as much for the learning experience as for the final result. One of the mundane things I ...
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