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In Reply to: RE: Low frequency output didn't match specification posted by Elgee1 on June 12, 2015 at 11:43:29
Ratings? Optimistic, best-case scenario maybe.You could try experimenting with seat and/or speaker positioning. If you or your speakers are sitting in a bass null zone, shoving things back or forth six inches at a time while you listen for the best bass could greatly change things for the better.
Edits: 06/12/15 06/12/15Follow Ups:
and start backing up from the stereo while playing the same low frequency. You should see the meter rise and fall while the frequency is playing as you walk further from the stereo. If you then sit where the bass frequency rises, you should get the bass you expect.
However, if someone else could help, I think that two speakers producing the same frequency and at different distances from the listening position, could cause a cancellation at that frequency.
Finally an 8 inch woofer may not be able to produce enough volume at 40Hz while okay at higher frequencies. Of course, the Wharfedale speaker is supposed to be only -3Db at 40Hz.
You should realize that bass frequencies need ROOM to develop,Low frequencies need 20-30 feet of the listening room .You might try a sweep frequency CD and a SPL meter.
Don't EQ your system with this method or you will end up with mediocre sound.Stay under 100Hz.
Tom:cat
Perhaps you're thinking of room modes. The lowest frequency room mode occurs when the wavelength is equal to the longest room dimension. Below that frequency, there are no standing waves. But lower bass frequencies are still supported by the room. Think about the bass in your car. Or when listening to headphones. You don't need a big room to hear low bass.
what bass frequency I used. It was definitely below 100Hz from a Stereophile test CD. What I may wrongly call a decibel meter was what you call a SPL meter. My living room where the stereo is located is 37 feet long. I cannot recall how many nulls I measured, but there were at least three in that distance. The speakers were a stereo pair of HSU Research HSRW10 subwoofers.
I also used the SPL meter to use all the frequencies on the test CD to measure the frequency response of all of my speakers together(subs and bookshelf speakers).
I wonder how many of us look for and measure horizontal room modes while forgetting that vertical modes also exist?
Most furniture is not designed to be moved vertically. Too bad, huh?
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