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The Levels are also measured at the listening position to determine if the FR has changed due to the room reflections/absorbtion balance.
It is known that most small-medium rooms lift the bass frequencies more than the treble - this is a good thing practically because loudspeaker tranducers and amplifiers generally have a diminishing Bass level both to
save money, and to minimise 'room-boom'
Isnt it confusing that there seem to be three types of test room?
Anechoic chamber(no walls)
Treated listening room (dealer demo room with absorbent areas)
Typical living room (mainly hard furnishings with likely hard ceiling and walls allowing 'boom')
Above is a table, showing how different materials absorb very different (dont reflect around the room) amounts of the sound. Any
domestic room can be considered an echo-chamber, it is just a compromise of how 'deaed' you want your room to be, or how reverberant (adds a little live feeling as if you were in a hall anyway)
Above : theory and measured performance are constantly at odds, here 1960s technology produces a smoother FR than is measurable today with 1/24 th octave FFT systems
When manufacturers launch a loudspeaker, they try to produce a flat F.R, that is a lie. this can be forged from using ridiculous measurement techniques, recorder settings, and averaging results till they are happy.
 
Above: When you visit a showroom, you may be treated to a 'treated' room, in most cases set up to minimise the flaws in that
loudspeaker, by careful placement, room adjustments and tweaking with cables , CD recordings available and so forth. In this
typical dealers room, which was purpose built for these loudspeakers, the excessive rugs, even over the sofa and walls were used
to disguise the wooly bass and room boom. Even though the room was built with no parallel walls, it couldnt be cured. I was
asked to find the room problem, but I tried toafter careful measurement and listening it was obvious that because the bass was
wooly coming out of the speakers, it couldnt be 'cured' no matter what you did to the room. they found that view impossible to swallow, given the thousands it cost to build.
Domestically, you are probably not going to treat your room with hundreds of pounds of special ceiling tiles, wall hangings and
certainly not throw out most of your CDs! The resolutions have been tested by many different owners in different lounges and all
were positive about the experiences over legacy loudspeakers. the feedback was so helpful, that it became policy NOT to treat
listening rooms for loudspeakers that dont need it, and so our own room is not treated. visitors can be sure that they are hearing a typical demonstration, not a custom one.
If you bought loudspeakers with anything like 'ppowerful bass', then you will end up with an 'overpowering' boom somewhere
around 100hz. what a headache, and have the neighbours jumping through your party wall if you play any rock at all.
Illustrated above wer the Celestio Ditton 25s with powerful 12inch woofer, that was impressive by muscle, but no detail at all..I was convinced they were the only superior bass end loudspeaker I heard, till i put themm in a relatively untreated room, and they
were awful booming, resonant things - consigned to the loft now..
Room acoustics changed my mind. The previous time I heard them, they were pride of place in a collectors 'tweaked' listening room.
This is a flaw in the whole marketing aand magazine reviewing process that pretends that ppowereful bass is not only essential, but
also everyone will only listen to them in an anechoic chamber or a treated room. Hmmm!
The resolution's bass is relatively quiet, but incredibly detailed - like nothing else. this means that even with moderate bass-boost
from your amp, the bass is nothing like so boomy and unsociable.If you want a disco or rock band - go see one, but if you are a
reasonable domesticated person, you will want pleasure rather than uncontrolled power. from the bass end anyway. after all there
is an obvious difference between what should be accredited as 'Hifi' rather than 'P.A. system'
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