ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
I was looking at an old B and O catalog. It listed the lowest frequency for the 5 and 9 as 20hz and 30hz.
Looking on the web page they are now listed as 14hz and 28hz. Is this merely a change in measurements or has there been some actual change to the speakers?
Beolab 28s Beolab 9s Beolab 12-3s Beolab 1s Beolab 6000s 2 pairs Beolab 4000s Beovision 7-55 Beovision 10-40 Beoplay V1 32 inch Beovision Avant 32 inch Beosound 1 (CD player) Beosound 3000 Beosound 5 Core Essence MKII Beoplay M5
Razlaw: I was looking at an old B and O catalog. It listed the lowest frequency for the 5 and 9 as 20hz and 30hz. Looking on the web page they are now listed as 14hz and 28hz. Is this merely a change in measurements or has there been some actual change to the speakers?
The lowest frequency quoted depends upon the reference signal amplitude and frequency and the amplitude you decide to use as the cutoff "limit". When quoting frequency responses and bandwidths it is usual to use -3dB as the cutoff limit as this is the half power point, however there is no recognised standard and manufacturers can massage numbers to quote apparently better performance. B&O in recent times have taken to quoting a cutoff limit of -10dB which will result in a lower quoted frequency for the same speaker (a -10dB reduction is approximately a halving of the volume output). Depending upon the roll off rate this will reduce the quoted bass frequency by an additional octave or more.
Ban boring signatures!