Left: SEAS Prestige CA12RCY and L12RCY/P
Right: SEAS Excel W12CY003 and W12CY001
I’ve added measurements for the SEAS CA12RCY and the W12CY003 to the mid-woofer measurement section.
The measurements speak for themselves, but here are some comments about them:
Despite their small size they all need a rather low cross-over frequency in order to work properly. Especially the hard cone versions L12RCY/P and the W12CY001 ideally needs a cross-over point of about 2kHz in combination with notch filters in order to deal with the large cone break-up modes and their distortion profiles. For its size the W12CY001 have amazing bass capabilities.
The coated paper cone CA12RCY also have a raising distortion profile in the upper mid-range at higher listening levels, despite its rather smooth frequency response. This mid-woofer would also work better with a cross-over point of about 2kHz.
The Nextel cone W12CY003 mid-woofer can be used higher up in frequency, but have a rather high resonance frequency and it has some resonance and distortion issues at 950Hz, which might limit its usability.
For a complete line-up of 4.5” SEAS mid-woofer measurements see: