Solstice from Parts Express

[jackinnj]

I have been working on these cabinets, finished the veneering a week ago.

The design was subject to a modification by Modafferi to incorporate his XO design (infinite slope).

I have both XOs. Just to illustrate the electrical responses:

 

[jackinnj]

Some more pix. One unit is operating, the other XO just about finished:

 

[jackinnj]

I have been scouting 17mH inductors for others who might be interested. The 18mH coil on offer now at Parts-Express is an expensive Jantzen item. https://www.parts-express.com/Jantzen-6595-18mH-14-AWG-C-Coil-Toroidal-Inductor-255-844, another at Madisound: https://www.madisoundspeakerstore.com/steel-laminate-15-awg/steel-laminate-18.0-mh-15-awg-inductors/

The following was suggested by PRR in reply to a member looking for a 36mH coil much less expensively. This should apply to the lower woofer inductor suggested by Modafferi.

"

Disassemble a small power transformer with E and I laminations. Stack all the I pieces together and start winding.

Wind a few hundred turns of scrap wire (perhaps what you took off) to figure how much I and R you get for so many turns. Re-figure (remember to square) to get 36mH at a reasonably low resistance.

 

[jackinnj]

In the box impedance:

 

[jackinnj]

In the AudioXpress article of last December (2021) Modafferi wrote that the "soundstage" was not specific to any one particular location. I can confirm this.

 

[6L6]

…do you have to chase it around the house?

😆

 

[sumoking]

Any updates? How do the two compare?
Thank you.