dlneubec
03-31-2008, 04:05 PM
http://i32.photobucket.com/albums/d44/dlneubec/SoundRounds/DSCF0566.jpg
I finally have an update on this project!
I have a pair built and up and running (see the following pics). The final crossover points are around 400 Hz and 3700 Hz. I've only had a few short bit of auditioning, but they appear to exceed my expectations when I first started to pencil out this design. It's hard to believe there is under $300 in drivers and crossover parts to the pair. For music only, they rival and may even better my HOSS omni's, which have around $700 in crossover parts and drivers, though the SoundRounds are a couple db's less sensitive and can't be pushed as hard. The upper bass and midrange is more clear than any speaker I've built and compete with the best I've heard. The treble is a bit splashier with the Aura NT1 than the more subdued RS28's in the HOSS, though I'm sure the RS28's are more accurate and lower distorion, especially at high output levels. The bass seems very solid, deep and clean, with much more output than one would expect from a single RS225, though maybe the slot port loading at the floor level and boundary reinforcement from the floor have something to do with that. There is certainly no lack for bass, which is modelled with an F3 of round 31hz or so, IIRC.
Still, just for kicks, I set them up to cross over to the stereo subs you see in the pic at 60hz. The subs are sealed, but with active LT circuits (designed and built by John K. for my NaO Mini's) to extend the low end and the plate amp crossovers were set to 50 Hz. All I can say is WOW, what a great combination that made. For those who say you don't need a sub for music with 3way speakers, I'd have to argue with you now and suggest that maybe you haven't heard a well blended implementation.
Clearly they are unfinished. I have some waterfall Bubinga veneer to add to the mdf parts, but i want to wait to do that until a bit warmer weather, maybe about May. I was going to paint the pvc tubing a dark blue or dark burgundy to match the decor, but both my wife and I think they might look very nice left as natural pvc white. The PVC is sanded with 180 grit, so they take on a sort of soft, almost suede material appearance (you can't really see this in the pics). The bubinga will darken them up overall significantly as it is and will hopefull add a nice contrast and richness to the look. I will probably use a linseed oil on the solid maple portions to bring out its colors and richness.
I finally have an update on this project!
I have a pair built and up and running (see the following pics). The final crossover points are around 400 Hz and 3700 Hz. I've only had a few short bit of auditioning, but they appear to exceed my expectations when I first started to pencil out this design. It's hard to believe there is under $300 in drivers and crossover parts to the pair. For music only, they rival and may even better my HOSS omni's, which have around $700 in crossover parts and drivers, though the SoundRounds are a couple db's less sensitive and can't be pushed as hard. The upper bass and midrange is more clear than any speaker I've built and compete with the best I've heard. The treble is a bit splashier with the Aura NT1 than the more subdued RS28's in the HOSS, though I'm sure the RS28's are more accurate and lower distorion, especially at high output levels. The bass seems very solid, deep and clean, with much more output than one would expect from a single RS225, though maybe the slot port loading at the floor level and boundary reinforcement from the floor have something to do with that. There is certainly no lack for bass, which is modelled with an F3 of round 31hz or so, IIRC.
Still, just for kicks, I set them up to cross over to the stereo subs you see in the pic at 60hz. The subs are sealed, but with active LT circuits (designed and built by John K. for my NaO Mini's) to extend the low end and the plate amp crossovers were set to 50 Hz. All I can say is WOW, what a great combination that made. For those who say you don't need a sub for music with 3way speakers, I'd have to argue with you now and suggest that maybe you haven't heard a well blended implementation.
Clearly they are unfinished. I have some waterfall Bubinga veneer to add to the mdf parts, but i want to wait to do that until a bit warmer weather, maybe about May. I was going to paint the pvc tubing a dark blue or dark burgundy to match the decor, but both my wife and I think they might look very nice left as natural pvc white. The PVC is sanded with 180 grit, so they take on a sort of soft, almost suede material appearance (you can't really see this in the pics). The bubinga will darken them up overall significantly as it is and will hopefull add a nice contrast and richness to the look. I will probably use a linseed oil on the solid maple portions to bring out its colors and richness.