Very nice! For those wanting to build something similar. PE has a pair of 5-1/4" Poly Woofers for $14.88/Pr. They say it's a buyout, but it is a Dynavox woofer, sold normally at $7.50/Ea. ($15.00/Pr.) by Dynavox. It has a 0.86 QTS.
Last edited:
navin!
The driver units are Scanspeak Illuminators. The loudspeakers are based on Troel Gravesen's Illumina 66 Loudspeakers. I changed the material and veneer, the shape of the loudspeaker but faithfully kept the dimensions of the front baffle and internal volume. Top part of the baffle is covered in leather from Land Rover seats.
Steve
The driver units are Scanspeak Illuminators. The loudspeakers are based on Troel Gravesen's Illumina 66 Loudspeakers. I changed the material and veneer, the shape of the loudspeaker but faithfully kept the dimensions of the front baffle and internal volume. Top part of the baffle is covered in leather from Land Rover seats.
Steve
This is version 1. Will be starting on version 2 this summer.
Hi Rob!
Just curious how much power do these speakers require to really sing? Also do these speakers seem to prefer either solid-state or tube amplification or doesn't that seem to be an issue? Beautiful to behold and I'm sure a pleasure to listen to as well!
I'm listening to: Dreamland by Yellowjackets
Thetubeguy1954
Hey Tubeguy,
They aren't very efficient due to the mid range choice. The mids are the limiting factor with an overall efficiency of 88.3 dB 2.83V/1m. The Qts is 0.95 and why I chose them for open baffle use. Still, just a few watts is all it takes at my usual listening levels.
I use solid state amps to drive them. I can't say how they sound with tubes as all I've tried is a single tube buffer.
Rob
They aren't very efficient due to the mid range choice. The mids are the limiting factor with an overall efficiency of 88.3 dB 2.83V/1m. The Qts is 0.95 and why I chose them for open baffle use. Still, just a few watts is all it takes at my usual listening levels.
I use solid state amps to drive them. I can't say how they sound with tubes as all I've tried is a single tube buffer.
Rob
??????
24 woofers per channel with each driver at 88db. 3b increase per doubling of drivers so 2 is 91db, 4 at 94db, 8 at 97db..............if these aren't ridiculously loud with a 5 watt sett, somethings wrong! Lol
They are 7' 8" tall. The imaging is huge and yet very natural. The biggest downside being I won't be able to go any other route for my main system. I do want to build a couple different types of speakers but mainly I'm looking at ways to improve on the floor to ceiling variety. I really like full length line array type two way speakers with distributed bass. Variations of this theme is likely where my attention will be for the next few years.
Nice! I agree about Eminence 12LTA, it sounds great in open baffle and a few crossover / filter tweks...
What the chosen crossover freq. you prefer?
I let the 12LTA play full on open baffle and blend a tweeter (Eminence ASD 1001 plus Dayton 4.5" waveguide) using a 1.33uf cap. That's it. Not sure what frequency that would be but it's probably rolling in somewhere just after 10kHz.
The bass is covered by the H-frame which is dialed in by a 100 watt Dayton subwoofer amp. I'd recommend upgrading the amp to a higher powered option for better control of the bass and volume but for now it's all good in my apartment.
The bass is covered by the H-frame which is dialed in by a 100 watt Dayton subwoofer amp. I'd recommend upgrading the amp to a higher powered option for better control of the bass and volume but for now it's all good in my apartment.
Yeah, they do pretty well. 😀 It only takes a few watts per channel at my normal listening levels of about 75-85db.
Thank you very much Fjellhelten for your kind words. As they burn in I am rediscovering my music collection and finding or I should say hearing details and instruments that were vague rumors before!
well, with that many drivers per side and presumably a XO of some sort, there could be enough reactance to the impedance curve to cause many a 5 watt SET minor conniptions - sometimes there's more to power than just the number of watts "available"
Isn't it ironic...Great design, nice response, assymetrical XO, and built beautifully. But, can't figure out how to rotate a pic!!! Don't worry, we all go through things like that.
Yes it sure is! I can use Mathcad and lspcad but not rotate a picture. Go figure. Thanks for the kind words.
Attachments
I just finished (save for making some new wiring) a new pair of OB mid range units to go with my Newform Research tweeters.
I've done preliminary measurements/adjustments but now I'm going to listen for a couple of weeks before going back to the minidsp to tune them in.
So far I'm very happy!
I've done preliminary measurements/adjustments but now I'm going to listen for a couple of weeks before going back to the minidsp to tune them in.
So far I'm very happy!
