sub wiring question


i just bought 2 SPL Velodyne sub ,im using them for 2 chanel music , the sub has SPEAKER LEVEL INPUT and RCA LEVEL INPUT , im using A308 cr musicalfidelity power amp , my amp has rca output , so my question is which way should i connect between SPEAKER INPUT or RCA INPUT , could you guys tell me which way the best for my sub , and without
affecting the performance of the amplifier ,Any help would be amazing.
duypham
Connect the R preamp output to the RCA level input on the R Velodyne.

Connect the L preamp output to the RCA level input on the L Velodyne.

Then use the setup/balance procedures in the Velodynes to integrate them with the main speakers. What this constitutes depends on which version of the SPL subs you have.

Also, this will not roll off the bass in your main speakers. To do this, you might make use of the Tape Monitor loop and the RCA outputs of the Velodynes.

Kal
Post removed 
If you have an extra $450 available, I'd grab a Velodyne SMS-1 and run pre
out R and L into the SMS line in R and L with RCAs and then the same scheme
from the SMS line outs into the subs. This will roll off your mains and your
subs. If you have 2 sets of RCA out from your pre, you may wish to run one
set per Kal's set-up and one per mine. This will run your mains full-range.

Either way, IME, you'll be happier.

Marty

PS search "SMS" in these forums and you'll see my (never ending -
sorry!) commentary on this excellent product.