Those are indeed the TOTL Fried model for their time.
I sent Ohighway a copy of the crossover plans I have.
I will be curious to see if the crossover specs are the same?
The C2 and O2 use the same exact enclosure as the first model C and O.
The C2 use aperiodic loading and the O2 use the 1/4W T-lines.
Transparent Sound sourced the polypropylene cone woofers.
The C2 models serial no. C1801K and later were wired using the series crossover configuration. The switch to the series crossover were also used in the entire line of Fried speakers.
There were two versions of the C2 and O2 model.
The first versions used the Dynaudio D-28H like the first model C.
The woofer frames were the square type like the first model C and O that used the Dalesford drivers.
The other question is are the tweeters the Scan Speak 2008 or the Hiquphon 2092 Fs?
I heard an early C3L model that used the Scan Speak 2010 tweeter.
The Hiquphon tweeters were used in later versions of the model C3L- C6L They also used 1/4W T-lines for the mid bass driver.
http://www.usaudiomart.com/details/649024094-fried_c2_monitor_speakers/
http://www.hometheaterequipment.com...gendary-speakers-70s-friedclassicspeakers.jpg
I am looking forward to reading Ohighway's review of these speakers.