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In Reply to: Re: Have you measured the bass response? posted by mikel on November 17, 2004 at 16:52:31:
"in my case i have a mild 'bump' at 134hz and a mild 'hole' at 80hz (both 4db to 5db)"And there are no further bumps/holes of this magnitude to, say, 20Hz? That's pretty impressive.
"Rives said that above 134hz my room was the flatest they had ever measured"
I wasn't aware that above 200Hz was really an issue. I get 77-80dB for 250-2kHz in my untreated room.
Stephen
Follow Ups:
"I wasn't aware that above 200Hz was really an issue. I get 77-80dB for 250-2kHz in my untreated room"How did you measure that? Sounds way to good to be true. Otherwise, please tell me the secret. :-)
I used a Radio Shack Digital SPL meter at my head position and the Stereophile Test CD with frequency tones (I can't remember which disc). I was aiming for 78dB so -1, +2 seemed pretty good. Below 100Hz it's a different story ...
Stephen
To get the true readings you need sweept sine, analyzed with something with precision. I´d guess you have much worse peaks and dips than your current measurement shows. That´s why I was so surprised.An untreatened room typically have variations like +/-5dB (best case) to +/-10dB. In the bass something like +/-15dB or something like that.
-1 +2dB would be good for many speakers, add the room ontop of that and we´re talking rollercoaster unless some serious room treatment are in place,
/Peter
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