I am connecting two pairs of identical 8 ohm woofers (1401Nd) to two mono amps. Is it better to wire them in parallel for 4 ohms, or in series for 16 ohms impedance? Should one way sound any different than the other? My amps are Bryston 7Bs which are actually bridged amps (series), which can also be wired in parallel. The manufacturer states that in bridged mode they will handle impedances down to 4 ohms. In Parallel they will handle 2 ohms. Any opinions on what is the optimum way to set this up? Thanks.