If you get the Cat SL1, make sure it has the 6922 driver tube instead of the 12AU7. Those would be from the models SL1 Signature Mk III and up to the present day.
Caveat: the older Cat preamps do not have a high/low gain setting and their 25 dB of gain means playing music with the volume control between the "nine" and "noon" position for normal listening levels.
Caveat: the older Cat preamps do not have a high/low gain setting and their 25 dB of gain means playing music with the volume control between the "nine" and "noon" position for normal listening levels.