How did I build my SASS ? - DD4WH/SASS GitHub Wiki

Parts needed:

• large Yoga block (290mm x 52mm x 124mm)
• boundaries made from wood (1.9mm x 9.2cm x 12.4cm)
• 4 x EM272 electret condenser microphone capsules (preferably matched for sensitivity)
• good shielded audio cable (eg. Mogami 2697 balanced miniature cable)
• 2 x Neutrik male XLR plugs
• 2 x electrolytic capacitor at least 4.7µF 25V
• 2 x 22 KOhms resistors
• acoustic foam block ["should block frequencies above 1200Hz by more than 3dB per inch"]. I used "Basotect", but that is probably overkill
• aluminium or metal sheet (<= 0.8mm thick), 150mm x 400mm

Dimensions

Dimensions of the DIY SASS built by DD4WH Front view of my DIY SASS

Assembly

• drill two holes each into each of the wood boundaries for the mics. It is essential that the mics are flush with the boundary surface
• fix the mics
• solder the mics in parallel to one cable end (for details look HERE )
• drill holes for the cables into the yoga block
• put cables through yoga block

• solder electrolytic capacitor and resistor and GND connection to XLR plug (for details look HERE )

Adjust the resistor value to your needs. For my Marantz PMD661 recorder with 4.2kOhms input impedance I can measure 8.2 Volts at the EM272 mic with 22kOhms resitors

• solder cable ends to aproppriate connections on the XLR HERE