Sure you will get some very interesting responses. I have owned a pair of Spica SC-50s, predecessor to the TC-50 for about 15 years. Little odd shaped cylindrical enclosure. Coupled with a local designer's subwoofer, the combination has been amazing for the price. Vocals, piano, guitar excellent. Could not drive too loud or they became edgy. Visited audiophile dealers several times over the years comparing the SC-50s to their latest "hot" speakers claimed to be great for imaging and quality of reproduction. Each time left with my SC-50s. Nothing better until you spent over $800 per speaker.
Recently acquired a pair of Spica TC-60s. As advertised, great imaging. Not sure if Time Coherent is making the difference, but the TC-60s are clearer, slightly better imaging than the SC-50s. Neither has a strong low end alone, but the TC-60s coupled with the subwoofer are knock outs. The low end is cleaner, tighter, deeper and explain this - the subwoofer amplifer is now running at 40% volume when it previously took 80% for the same sound level. Better quality, less power.
Recently acquired a pair of Spica TC-60s. As advertised, great imaging. Not sure if Time Coherent is making the difference, but the TC-60s are clearer, slightly better imaging than the SC-50s. Neither has a strong low end alone, but the TC-60s coupled with the subwoofer are knock outs. The low end is cleaner, tighter, deeper and explain this - the subwoofer amplifer is now running at 40% volume when it previously took 80% for the same sound level. Better quality, less power.