Peak in high frequency response- room resonsible?

[jmiller]

My last two speakers, not known for sounding bright, have sounded bright in my room, which is a bit on the bright side. i have covered all the windowns and much of the walls and floors with sound-absorbing material, but the big ceiling remains. My latest speakers test remarkable flat over most of the audio range. Measuring in 1/3 octave bands, they are essentially flat to within about 2 dB from 25 Hz to 3 kKz ( the low frequency response of the speakers is tuned internally for the room by the dealer). However, from about 4-7 kHz there is peak in the response that rises about 4-5 dB high. At 8 kHz the response is back to normal and remains that way to 10 kHz, the highest frequency I trust my meter.

I can easily hear this bump as an unpleasant brightness. My last speakers had exactly the same measurements, yet both speakers are rated to be quite flat in this region. Is there any way the room can contribute this enhancement of response? I don't see how any resonances can be involved at this frequency. If it isn't the room, what else could it be? I have a hard time believing it's wires or interconnects, though the speakers wires are 20 feet long, guage 12. Changing electronics doesn't seem to matter.

Thanks for any help.

Joe

 

[j_garcia]

If two speakers did the same thing and various electronics I would definitely say it is the room. Though it is only one band, you might consider an EQ if it bothers you that much; and it sounds like it does.

Do you happen to have a big screen between the speakers? How far out into the room/away from the wall are the speakers placed? What if you move the speakers to another location within this room? Positioning can make a big difference.

 

[j_garcia]

i have covered all the windowns and much of the walls and floors with sound-absorbing material, but the big ceiling remains.

What about the floor? Is it hardwood? Tile? Concrete? Carpet?

 

[agarwalro]

This is a job for... BFD.

Fairly advanced knowledge required and it has a complicated setup process. But the results are supposed to worth it. It says discontinued on the company website but links still work. Available everywhere else for about $100.00

 

[j_garcia]

It was replaced with this.

 

[JohnPM]

What meter are you using? If it is an RS meter it has a bump in its response in that 4-7k range that is about the size you are seeing.