Now, I have the Mods Completed on My 1Cs!
1.Installed RDO 194 Tweeters
2.Installed Crossovers Upgraded by Vr3 Mods:
a. Gimpod Boards
b. Clarity Caps
c. Mundorf Resistors
i.Tweeter Network: Clarity Cap ESAs:
ii.Midbass Network: Clarity Cap PXs
d. Jantzen Perfect-lay Inductors: Board-mounted & SDA
3.Custom SDA Interconnect Cables by Vr3 Mods:
a. Supra Rondo 2.5 Cable
b.Neutrik speakOn NL2FC Male Connectors (Speaker Ends)
c.Banana Connectors (Dreadnought Ends)
4.Custom Aluminum Binding-Post Plates by Vr3 Mods:
a.Upgraded Binding Posts
b.Neutrik speakOn NLJ2MD Female Jack Receptacles for SDA Cables
5.Dreadnought SDA Amplifier Interface per DarqueKnight’s Design:
a.Toroid Corporation of Maryland 600VA Transformer
b.“Larry’s Enclosure” by Toolfan66
c.Cardas CCGR Binding Posts
6.“Larry’s Brackets & Rings” by Toolfan66:
a.Brackets for Tweeters
b.Rings for MWs and PRs
7.Black Hole 5 Installed behind Tweeters, MWs, and on Sides in Cabinets
8.Dynamat Xtreme on MW and Passive Radiator Baskets
9.JB Weld on MW Magnets
10.Custom-cut Gaskets for PRs (1/4” Neoprene Material)
First impressions of sonic performance:
Immensely improved clarity, definition and openness of the high frequencies -- e.g., in Rebecca Pidgeon's rendition of "Spanish Harlem" on Chesky's "The Raven" CD.
Greater depth and clarity and power in the bass. Timbre of the instruments came through clearly and accurately -- e.g., bass violin in the Turtle Island String Quartet, "Windham Hill Retrospective."
Overall, the accuracy and richness of the sound reproduction is remarkable even at this early stage of burn in, and I'm sure it will get better and better.
Well done, Trey! Thank you, once again for all your good work, help, and advice.
Thanks also to DarqueKnight, Toolfan66, F1Nut, drumminman, nspindel and everybody else on the Forum who have searched for, found and passed on information about these mods that have made it possible for a neophyte like me to get this done -- one way or another.
Here are some pictures of the process:
Update on 1Cs Sonic Performance
Just to round out this story as I move on to mods on my old Allison 6s and completion of power cable builds:
As I expected, the more I use the 1Cs, the better the sound gets. While the setting for this system (an exercise area in my basement, which is a large open space with the kinds of detritus characteristic of basements! :smile:) is far from ideal for evaluating a system's performance, I am confident in saying that the sound has improved dramatically after about 30 hours of use.
The highs are very crisp and clear, the transients in blue-grass music (e.g., Andy Carlson Band's "Fiddlehead" and Lenny Solomon's "Bowfire") are clear and precise, as they are in Bella Fleck's classical banjo renditions in "Perpetual Motion."
Midrange sound is distinct and mellow in a good sense -- e.g. vocals and instrumentals in David Johansen's "Shaker."
Bass is wonderful: Compact, punchy, nicely tactile, as in Mark O'Connor's Hot Swing Trio's "Live in New York," as well as in the above selections.
Because of the space in which this system performs, it is difficult to evaluate the soundstage, except 1) that in the "sweet spot" the rendition of the music is very realistic with respect to both the location of vocalists and instruments and the apparent movement of sound around the stage as parts change in the music and 2) that the power of the projection virtually fills this large space with sound, even at moderate volume levels.
All in all, these speakers produce great sound in a difficult context.
An aside: Just as I was reconnecting the 1Cs into this system, the on/off switch in my 25+ years old Perreaux PMF3150 amp failed; the switch would not remain in the "on" position. I had to replace it with my Perreaux PMF2350 (same vintage) while the 3150 is being repaired. When I have the more powerful 3150 (300 wpc into 8 ohms v. 200 wpc into 8 ohms) back in the system I expect to get even better performance.
Once again, thanks to all those on the Forum who made it possible for me to make these improvements in my system, and especially to Trey for his excellent work, great follow-up, and sound advice (pun intended :smile:).