The TC-60 was the last model in production and was launched after Spica's purchase by Parasound. The Spica TC-60 Sales flyer described the TC-60 as retaining the characteristics of its legendary TC-50, plus extended bass, more transparent highs and vastly improved dynamics. In order to create realistic stereo imaging, every single variable was carefully calculated for perfect time coherence. Proprietary software and measurement techniques allow us to offer results other manufacturers haven't been able to match. Spica technology seamlessly combines to create sonic images which lock-in between the speakers and extends far beyond them.
While both a 6 ohm and 8 ohm versions of the literature exist, this was only a change in the literature not in the design. Interesting side note, speaker builder VMPS manufactured the TC-60 cabinets for some period (Audio Asylum thread).
Nov 1994, Spica TC-60 , vol 19, issue 99
Description: Two-way, stand-mounted, reflex-loaded (QB3 alignment) loudspeaker.
Drive-units: 1" (25mm) impregnated cloth-dome tweeter; 6.5" (165mm) polypropylene-cone woofer.
Measured crossover frequency: 3.4kHz.
Electrical crossover slopes: first-order, 6dB/octave, high-pass to tweeter; fourth-order Bessel, 24dB/octave, low-pass to woofer.
Frequency response: 48Hz–20kHz (-3dB).
Sensitivity: 87dB/W/m (2.83V).
Nominal impedance: 8 ohms (5.6 ohms minimum at 10kHz).
Power handling: 60W continuous, 120W peak.
Dimensions: 21.25" (540mm) H x 11.5" (292mm) W x 10.5" (267mm) D.
Weight: 26 lbs (11.8kg) each.
Finishes available: natural wood veneers.
Price: $795/pair in oak, $825/pair in black, $895/pair in cherry. (not including stands)
Matching "Gravity" stands $250/pair
Approximate number of dealers: 75 (Dec.1994)
TC-60 Schematic (Bau sketch with notes)
TC-60 Board Layout (Bau sketch)
Woofer: Peerless 180 WR 33 102 PPB AL 8 ohm - Order ID: 832732
Tweeter: Vifa D27TG-45
Pete Basel reports that the Vifa tweeter used in the TC60 now marketed as a Scanspeak Voice Coil (600058) at Madisound