pass XA 60.5 vs Pass X250.5


I am just getting familiar with the XA 30.5 amp in a active system for mid and high frequency reproduction. What would fellow Pass labs owners think to be the best option for 110Hz down, the XA60.5 or the X250.5. The speaker recommended 120W into 2 drivers,i.e. as its sold there are 2x60 watt amps one for each bass driver. I think the XA series is more expensive but in terms of sonic performance do you'll envisage that there is a significant difference between these two amps for my application.
Thanks
ecka

Showing 1 response by ecka

Thank you for the responses so far. The speaker is the Orion which is a Siegfried Linkwitz design is fully active i.e. each frequency band has to have it's own amplifier. The design is an open baffle dipole with 2 bass drivers, one facing forward and the other in reverse but wired in tandem. Currently each of these drivers is powered by it's own 60 watt amplifier. The specs of the driver are as follows ( please pardon all these numbers as I don't really know which ones you'll need to give me your opinion on this issue)
Electrical Data

Nominal impedance Zn 8 ohm

Minimum impedance Zmin 4.9 ohm

Maximum impedance Zo 53.3 ohm

T-S Parameters

Resonance Frequency fs 18.9 Hz

Mechanical Q factor Qms 2.63

Electrical Q factor Qes 0.18


Sensitivity (2.83V/1m) 88.4 dB

In stock form with it's ATI amplifier, it is a excellent sounding speaker. However when I substituted the Pass XA 30.5 for the mid and high drivers it elevated the performance of the speaker to another level. My issue is to therefore get the lower end to be of comparable quality, hence the question.

Thanks again for the input