amp wiring question?

re510

i recently purchased a carver av-405 amp here are the specs
SPECIFICATIONS
>
> 8 ohm Rated Power/Channel (L/R front) 100W
> Rated Full Power Bandwidth 20-20kHz
> Center channel power 110W
> Surround power/channel 50W
> Stereo Power (L/R front) 150W
> 4 ohm Continuous Power/Channel (L/R front)
> 150W
> THD at 1kHz <0.05%
> Input Impedance (Line) 39 kohms
> Input Sensitivity (L/R front) 1V
> Gain 29dB
> S/N A-weighted, ref. to rated power >95dB
> Power Consumption at full power 775W
> Dimensions without handles 4.4x17x13.7
> Net Weight 30 lbs.
> Shipping Weight 35 lbs.

i have two sets of main speakers, rt100i w/ rt35i stacked on top (upside down) should i wire them parallel to get a 4 ohm load or sould i wire th rt100i's off the amp and the rt35i's off my yamaha
if i wire them parallel is that going to give me more or less power?
Any input would help?
Thanks