I'm creating this thread just so I won't continue thread jacking other ones when related topics come up- :roll:
The Arvo Pärt Picante is a very new project (about a couple weeks old!) which has been motivated/inspired by a number of diverse factors.
If this doesn't constitute all the planets and stars coming into alignment, then I don't know what does... plus I'm going to have a bit of time off and be spending time in town, as my girlfriend is having a hip replacement surgery, so no travel for us for a while.
I'm cutting wood this afternoon, for the first test article, and some pieces for the final pair. I should probably just lay low on this until we've got hardware and results in hand, but I have a good feeling about it...
Also, I plan to investigate lower cost driver and active crossover solutions with a later test bench build. Possible drivers might be the RSS265HO on the bottom end, and the RS180 for miss; tweeter will likely be the N26c if it pans out regardless; I haven't found anything else of significantly lower cost I'm truly partial to, but this could be a good opportunity for the RS28F, or for me to get to know it!
This has also brought up the topic of lower cost active crossover solutions in digital; the DCX2496 is a known but controversial, perhaps inconsistent solution; a new interesting contender is the MiniDSP products, which seem to be easy to work with and well suited to a DIY approach. Lots to investigate and talk about.
The general outline of the cabinet structure is forming fairly clearly, and I have early sketches and some cut wood (a dangerous combination, I know... a little more simulation work remains to be done).
So, in the spirit of sharing, the basic sketches for front and side profile:
As mentioned, I have simulated the crossover concept from some measured data box mount data, using the SS aluminum Illuminator woofers and the SS 9130 tweeter with waveguide as a "proof of concept". This seems satisfactory in a first pass to establish the passive crossover concept for midrange to highs.
This should by NO means be taken as the finished passive part of the crossover, just a way of verifying the network structure and proof of concept using SS waveguide mounted tweeter with the Illuminator woofers at the desired crossover range (LR4 at 1600 Hz, in TMM 2.5 way)
The Arvo Pärt Picante is a very new project (about a couple weeks old!) which has been motivated/inspired by a number of diverse factors.
- Metric Halo LIO-8: my main DAC is capable of a lot more than just two channel audio playback, and with it's fairly powerful DSP front end and 8 main channels, it seems like a natural for an active or partially active speaker system. It's about time I tried that out.
- Earlier this year I bought a full Mamba XDB I/O interface box for the LIO-8, so I've all the physical I/O for the DB25 connectors solved.
- Seas has released the L26RO4Y 10" driver optimized for open baffle- a lot of changes to parameters, spider design, etc. - and at nearly the same price as the original- this represents a new level of performance possible with just a 10" nominal OB woofer.
- I've got a couple of pairs of Scanspeak 18wu-8747t00 that were originally intended just for LF, but some testing has shown they can likely be used up through the mids, say with an LR4 1600 Hz crossover? And their LF performance is phenomenal, due to the underhung motor design and suspension.
- I have three pairs of the Jantzen waveguides, and have gotten nice results with the 6640 in them, but also have a pair of Transducer Labs N26c on the way for testing- SS or Accuton level performance at lowline SS pricing
- I already have a good TMM 2.5 way crossover designed at 1600 Hz with measured data from the 18WU/8747t00 and 6640 - using the Jantzen waveguide on the tweeter
- I have enough Pau Ferro and LBL bamboo and high density birch ply that's phenolic veneered on hand to build something new in an Arvo configuration
- I have been a bit inspired by the web site Eric S put together for the Arvo Part Mk II, made be a little nostaligic for some of the "good old days" stuff (five years ago?!?). The section of Eric's site covering the Arvo was exactly what I would have like to put together, but I usually spend my spare time building speakers, not web sites….
If this doesn't constitute all the planets and stars coming into alignment, then I don't know what does... plus I'm going to have a bit of time off and be spending time in town, as my girlfriend is having a hip replacement surgery, so no travel for us for a while.
I'm cutting wood this afternoon, for the first test article, and some pieces for the final pair. I should probably just lay low on this until we've got hardware and results in hand, but I have a good feeling about it...
Also, I plan to investigate lower cost driver and active crossover solutions with a later test bench build. Possible drivers might be the RSS265HO on the bottom end, and the RS180 for miss; tweeter will likely be the N26c if it pans out regardless; I haven't found anything else of significantly lower cost I'm truly partial to, but this could be a good opportunity for the RS28F, or for me to get to know it!
This has also brought up the topic of lower cost active crossover solutions in digital; the DCX2496 is a known but controversial, perhaps inconsistent solution; a new interesting contender is the MiniDSP products, which seem to be easy to work with and well suited to a DIY approach. Lots to investigate and talk about.
The general outline of the cabinet structure is forming fairly clearly, and I have early sketches and some cut wood (a dangerous combination, I know... a little more simulation work remains to be done).
So, in the spirit of sharing, the basic sketches for front and side profile:
As mentioned, I have simulated the crossover concept from some measured data box mount data, using the SS aluminum Illuminator woofers and the SS 9130 tweeter with waveguide as a "proof of concept". This seems satisfactory in a first pass to establish the passive crossover concept for midrange to highs.
This should by NO means be taken as the finished passive part of the crossover, just a way of verifying the network structure and proof of concept using SS waveguide mounted tweeter with the Illuminator woofers at the desired crossover range (LR4 at 1600 Hz, in TMM 2.5 way)
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