ESL57s - loss of high frequency?
"John Smith"
I bought the meter from Maplins about 3 years ago. I don't remember the
make
and I'm not at home to check. Maplins had it at £50 or £60 but claimed the
full price was around £100 and when I looked around the net it was on sale
elsewhere for around £100 so I guess it's accurate enough for my needs.
** Once again - did you set the meter to " C " weighting ??????
Don't you know SPL meters do NOT have flat frequency response in the A or C
settings.
Did you other to read the handbook that came with the meter ??
I set it up 12 inches from the centre of the speaker mounted on a camera
tripod (the meter has a tripod mount).
** FAR too CLOSE to get a correct result.
The mic needs to be placed ( on axis ) at 1 to 2 metres distance for
response testing of ANY speaker.
Each speaker was measured separately
so 4 runs of the test. I set the volume control as I would for normal
listening. The test CD (EMI) has a series of tracks playing a fixed
frequency for about 10 seconds (20Hz-20kHz).
** Sine wave tones are NOT suitable for response testing done in an
ordinary room.
Room standing waves will completely ruin the result.
The volume coding is the same
for each track (15dBA below peak I think).
** Gawd - this fool is really clueless.
For each frequency I noted the
meter reading (its a digital readout). While the TDL readings stayed about
the same from 8-15kHz the Quads dropped over 12dBA and by 20kHz they were
over 15 dBA less than the TDLs. I can't hear much above 10kHz these days
but
the meter had no problem and I knew what frequency was playing by the
track
number on the CD player.
** This just gets worse and worse !!!!
Does this help or do you need the actual meter readings?
** Nothing you post will help.
( A bloody top poster as well as all his other crimes.)
......... Phil
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