Mnyb;540070 Wrote: > -84db and 90dB seems to be in higher pitch too at least the files I > grabbed ? > > -84 > -90 is in 3500kHz region > > -96 etc are in "A" something 440 region > > This invalidates my test, the god ol Fletcher Munson curve (aka > loudness) > Shows that and my test validates this, our hearing is much more > sensitive at 3,5k than 440 Hz. > > So regarding this -90 audible from listening position > And -114 dB with ear on speaker not much noise in the midrange driver > > I think that -102 or -108will be audible from listening position if i > get 3.5 kHz files. > > I took out my radio shack spl meter it show 54dB dBa 1,5" from the > driver. > This was on Left speaker full tilt volume on my meridianG68J with the > -84dB file. > > I use one power amp with adjustable input gain (all amps should have > this) > The rest have rothwell -10 dB attenuators fix to them. > Correct gain scaling of your system is important, especially with > digital preamps involved. > > Attache Fletcher munson curve.
Yes you are correct the files are a mixture of 440Hz and 3.5kHz - so not an apples-apples comparison! Also, that highband noise doesn't help... I can just make out the -96dB file on full volume at normal position. -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker & Chord Interconnect cables Kitchen Boom, Outdoors: SB Radio ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=77725 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
