Product Details:
Krohn-Hite Model 3343 dual channel precision variable audio filter. Digitally tuned over a frequency range of 0.01 Hz to 99.9 KHz. Can be operated in low-pass, high-pass, band-pass or band-reject mode. Attenuation slope of 96 db per octave in high-pass or low-pass mode and 48 dB per octave in band-pass or band-reject mode. Distortion is less than 0.1% over most of the range. Output impedance of 50 ohms. In excellent condition.

Features:

• Frequency Range: 0.01Hz to 99.9 KHz
• Frequency Accuracy: ±2%
• Pass Band Gain: 0 dB or 20 dB
• Attenuation Slope: 48 dB/oct. (each channel)
• Battery Operation
• Maximum Attenuation: 80 dB
• Floating (ungrounded) Operation

• 0.01 Hz to 99.9 KHz frequency range
• 48 db per channel attenuation slope
• 0 dB or 20 dB pass band gain
• eight pole butterworth or rc response
• ±2% calibration accuracy
• < 0.1% distortion (typically)
• 0.5 mv RMS hum and noise
• 80 dB maximum attenuation
• Dimensions: 17" x 17" x 6"