I am repairing my Marantz Imperial 9 speakers. I refoamed three woofers and one needs a new spider. The woofers pictured look like they are the original woofers to these speakers, but they are not CTS woofers like most other Marantz 9's pictured on the www have. The cones are not paper. The speakers have the early crossovers with air core coils and different capacitors. Does anyone know what these woofers are?