Originally Posted by zimmo
now my dimension for my cinéma room is 11x20x7,I eventually I make modification to 13x25x8,my instalation now is 7.4.4 ,I think to buy xpa7 and xpa5 for put more
power in my new cinéma room, my onkyo tx-nr3030 serve to préamp.what do you thing is good or not.
Zimmo, whether it's "good or not" or worthwhile depends on more than gut feel and the feelgood factor
of having a big new amp.
It actually depends on several things, one of which we don't know just yet. That is: What is the loudest level (-/+dB master volume) you would like to watch a movie or listen to music at in your room? Please let us know.
Your Onkyo TX-NR3030 has reasonably powerful amps and carries THX Select2 certification. This means that it's capable of playing any
commercially available program material (movies and music) to Reference Level
(calibrated 0dBMV) in a "Select" sized room when hooked up to a set of speakers with a minimum sensitivity of 89dB/1W/1m and nominal impedance of 4Ω (fronts) and 8Ω (all others).
THX room volumes and associated viewing/listening distances are shown below. Your current room (<1600ft^3) fits within the Select/Select2 envelope and I presume your viewing distance is about 12ft. All your speakers claim to meet or exceed the THX sensitivity and impedance requirements, if these are the ones: Paradigm Monitor 9 v5
; Paradigm CC-390 v5
; Earthquake Sweetspot SS-82W
So, provided those are
your speakers and you don't
intend to watch movies or listen at above reference
(calibrated 0dBMV) in your current room, the Onkyo TX-NR3030 alone will be capable of meeting your current power needs, and an XPA-7 or XPA-5 would not
be worthwhile. They won't actually "put more power into the room"... only the power that's actually required by your particular situation will be generated and the Onkyo will be able to generate that. Your money would almost certainly be better spent elsewhere.
In the future, when you modify your room to be larger (2600ft^3) than the Select/Select2 envelope, and if
you like to watch/listen at close to 0dBMV, that is when you should re-examine your need for a power amp.
I hope that helps Zimmo...