| Model ID | T-IIIA |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 81.3 × 182.9 × 2.5 cm (W × H × D); 6.4 × 7.2 × 0.1 cm (W × H × D) |
| Weight | 195lbs (System Shipped) |
| Frequency Response | 42Hz-18kHz ±2dB, 38Hz-20kHz ±4dB |
| Treble | 88in² Push-Pull Planar-Magnetic |
| Midrange | 504in² Single-Ended Planar-Magnetic |
| Bass | 504in² Single-Ended Planar-Magnetic (x2) |
| Sensitivity (500Hz) | 97dB/10W/2m |
| Impedance (Nominal) | 8Ω |
| Crossover Frequencies | 100Hz, 1.6kHz (Bi-Amplification Required) |
| Crossover Slope | 6dB/Oct (First Order) |
| Recommended Amplifier Power | 10-500W |
| Power Handling (Program, Midrange/Treble) | 300W |
| Power Handling (Program, Bass) | 300W |
| Enclosure Type | Dipole |
| MSRP (1974) | $1695 |
