The Marantz PMD 661, MKII & MKIII Super MOD upgrade rebuilds the XLR inputs using very high speed, very low noise and super low distortion op amps that dramatically improve low level detail and clarity. Super low THD+N op amps allow for a very wide SFDR even with signal levels down 50dB. This preserves the signal quality of the highest grade microphones when recording soft signals, like voice, un amplified music, nature sounds and FX. The Super MOD is the 661 upgrade of choice for filmmakers as it's audio qualities allow for more post production while maintaining the clarity and detail needed for optimal playback on typical audio systems used for video.
Please note this upgrade works in all 661 versions.
Click
Here for more details.
