The 6673 is a 73-sized module, adding the 1066 mid band to the 73 classic design, creating a 4 band tone monster that is really hard to beat. In addition, the 73 mid band has been expanded in frequency choices, with the classic 73 ones kept untouched. It also features a Baxandall type High shelf band, but with the addition of a high frequency selector switch offering 3 different frequencies instead of the fixed one at 12 kHz.
- Microphone input impedance: HI=1200 Ω minimum, LO=300 Ω minimum. Higher gain positions gradually have greater impedances, perfect for lo gain ribbon mics. Input is transformer balanced and floating.
- Line input impedance: 10 kΩ bridging, transformer balanced and floating.
- Output impedance: Less than 75 Ω, transformer balanced and floating, to drive a load of 600Ω.
- Maximum output: Greater than +26 dBu into 600 Ω, THD: Less than 0.025 % at 1 kHz, Less than 0.05 % at 100 Hz.
- Frequency response: 20 Hz (+0.3 dB) to 20 kHz (-0.2 dB).
- Maximum Gain: Slightly greater than 80 dB.
- Noise: Less than -100 dBu.
- Power consumption: Less than 110 mA @24 V DC.