Speakers are usually rated in open air.
If you place it near a wall it will gain up to 3dB.
It is yes
2Ch: MacBook w/Dirac Live RCS, Neko Audio D100 Mk2, Anthem TLP-1, Wyred 4 Sound ST-500, Acoustic Zen Crescendo, Behringer DCX2496/2xEP2500+4x15" Sealed Sub
HT: OPPO DV-983H, Sony PS3, Marantz AV8003, Wyred 4 Sound ST-500, D-Sonic M2-1750-5, Acoustic Zen Crescendo/Adagio Jr, Behringer DCX2496/2xEP2500+4x15" Sealed Sub, Epson 6500UB
Aux: Neko Audio D100, Musical Fidelity M6i, Onix Reference 3, SVS SB12-NSD, Panasonic TC-P50S1
HP: iMac, Neko Audio D100 Mk2, Donald North Audio Sonett, Audeze LCD-2
Depends where you place your subwoofer.
If its near a single wall, you will gain up to 3dB, near a corner will gain up to 6dB.
IPL S5TL Transmission Line and Ribbon front loudspeakers, less than £800
Minimax Tube DAC Plus (tube removed for extra 3D soundstage on electronic output!) fed by USB from PC, Foobar2000 player with WASAPI.
Emotiva XPA-2 amp, direct to DAC, no pre-amp for music, running S5TL speakers.
Onkyo 875 for centre and rear channels, XPA-2 for fronts in 5.1.
IPL Ribbon Centre and Rears
BK Monolith Sub
Rel Strata II sub
Panny 42PZ80B TV
LG DM2780D 3DTV / PC monitor
Humax Foxsat HD PVR
I got my speakers in today, and set them up. I did the auto calibrate function and then went in to manually set crossover. It turns out my only chooces are 50, 80, 100, 150, and 200.
It sounds the best at 80.
When I play my older L212s which have a acoustical roll off @ 70 htz I set my P7 pre-amp @ 80 htz for the sub XO, being my choices are 50, 80, off.
For my PT800s, I set the sub's XO to 100~110, which is about the max for the SUB1500, as it is VLF sub. So that gets me close to the PT800's -3db point. If I were to set the sub XO to 80 then I would end up with a 3db dip, as the PT800 is -6db @ 80.
So that gets me close to what the PT800 was designed for, when stacked to a PS1400 sub to make a full range system with the XO @ 130.
amp, will not be as forceful as a good sub.
If you have the good fortune to have something like the Revel Salon2 and have very good amps, like a pair of Parasound JC1 mono blocks, then those full range speakers will kick ***.
The one exception in most cases for the XO point is if the mains and sub(s) are co-located. Such as with a JBL Performance Series system. When docked together and the internal 130 htz XO is used, they become a full range system with a built-in powered sub. So the 130 htz XO does not become a problem as both share the same location.