- Harman Kardon part number FT-3423996.
- 6K Push-Pull to 8 & 16 ohms 15 Watt.
- Frequency Response 10 Hz to 100 kHz +/- 1 dB @ 1 Watt
- Primary DC Resistance 305 ohms.
- Part Number TT-470-OT
- Harman Kardon part number: FT3063460
- Frequency Response: 15 Hz to 100 kHz +/- 1 dB @ 1 Watt
- Primary DC Resistance: 300 ohms.
- Part Number TT-471-OT
- Harman Kardon part number FT415216-B
- Frequency Response 15 Hz to 100 kHz +/- 1 dB @ 1 Watt
- Primary DC Resistance 300 ohms.
- Part Number TT-472-OT