CSS FR125S ... production units playing now...

[jleaman]

On another note at the start of the day when dae picked me up i was talking about a pair of speakers id like to build with 4 drivers 2 x 7" a 5" and a tweeter bragging about this is wha ti want not something some one esle has designed and had.

Lets just say at the end of the day dave laughed at me and said well there goes your complex driver's / Boxes. I agreed and said i would rather have the floor standing towers.

[morbo]

Wow that Mini-O looks cool, kind of like those D-Box 'mammoth' subs that AudioIdeasGuide used to rave about. Any details about that enclosure? Is it just a slot-ported box with multiple ports?

[planet10]

Originally posted by morbo
Wow that Mini-O looks cool, kind of like those D-Box 'mammoth' subs that AudioIdeasGuide used to rave about. Any details about that enclosure? Is it just a slot-ported box with multiple ports?

No idea about the D-Box (except that is is pricey). Once we nail these i'll publish the plans on my web-site. So far things are looking good. Just ran impedance... based on that they should have F3 in the 55 Hz neighborhood, and hopefully the resistive nature of the ports will give a less drastic roll-off than a typical BR.

dave

[chrisb]

I had a chance to listen for a few more hours last night & this morning, and they're sounding better by the hour.

I can't wait to give 'em 200-300 break-in, and compare to FE127E bipoles, but my bias to SE amps might get in the way.

For the benefit of readers, the short story is that in both enclosures, (the Onken inspired and Tim's bipole MLTL) 3 different SET tubed amps ( Decware Zen Select, and 2 experimental homebuilts) sounded absolutely broken with the WR & FR drivers. The absolutely worst case of amplifier imcompatibility I've heard in over 35yrs, and quite disheartening with Bob sitting in the room.
Fortunately, someone finally suggested we switch to a differnent amp topology.

With the Pass Mini-A (ask Jason for model details) or relatively stock Jolida 302 (EL34 PP triode strapped) no problems at all. Excellent bass extension and articulation on the SS, but rather dry/thin midrange and collapsed soundstage compared to the tubed amp.

Tim: excellent design work on both the FE127E & CCS enclosures - hopefully we'll still have some running for your next visit.



Don, thanks for the listen to the GG - very nice pre-amp, even if a very "engineer" execution, and best of luck with the Buschorns - no doubt there's tons of advice available re tweaking the public design. Just remember in this hobby as in life, there is no single "right" way to do anything, and even experts and engineers have been known to change their thinking.

"Perfect music, forever"?

[planet10]

For those that haven't seen these drivers in real life a picture (the Wr125S & FR125S are pretty much indistinguishable except for the label)

dave

[Timn8ter]

Tim: excellent design work on both the FE127E & CCS enclosures - hopefully we'll still have some running for your next visit.

Thanks. I hope you have them available for listening in August. BTW, an integrated amp I've heard that has been successful at driving these is the Plinius 8100.

[jleaman]

Originally posted by Timn8ter


Thanks. I hope you have them available for listening in August. BTW, an integrated amp I've heard that has been successful at driving these is the Plinius 8100.

I'll be bringing out my Mini a ( class a 15 Watt amps )

[planet10]

Originally posted by Timn8ter
I hope you have them available for listening in August. BTW

Plans are to have a plywood set & an MDF set so that we can do a materials shoot-out.

dave

[maxro]

Originally posted by chrisb
For the benefit of readers, the short story is that in both enclosures, (the Onken inspired and Tim's bipole MLTL) 3 different SET tubed amps ( Decware Zen Select, and 2 experimental homebuilts) sounded absolutely broken with the WR & FR drivers. The absolutely worst case of amplifier imcompatibility I've heard in over 35yrs, and quite disheartening with Bob sitting in the room.
Fortunately, someone finally suggested we switch to a differnent amp topology.

With the Pass Mini-A (ask Jason for model details) or relatively stock Jolida 302 (EL34 PP triode strapped) no problems at all. Excellent bass extension and articulation on the SS, but rather dry/thin midrange and collapsed soundstage compared to the tubed amp.

[/B]

So, what's the deal with amp/driver incompatibilty? Is it the (assuming parallel wiring of drivers) 4 ohm load that is the problem? How would they do with a mass market solid state ie '90's Yamaha or '70's Kenwood? How about a Gainclone?

Max

[morbo]

I can't speak to any reasons for the incompatibility, but I have run the WR125s off a 70's Yamaha reciever @ 40wpc, a 90's Carver reciever @ 60wpc, and a brand new Panasonic XR50 digital reciever with very good results.