• S3MX XLR male, silver-plated 3-pole contacts, nickel-plated die-cast shell

• S3FX XLR female, silver-plated 3-pole contacts, nickel-plated die-cast shell

• S3MDX XLR male chassis, silver-plated 3-pole contacts, nickel-plated "D"-size

• S3FDX XLR female chassis, silver-plated 3-pole contacts, nickel-plated "D"-size