Speaker Asylum

"BBC dip" is overstated

12.28.46.98


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As an interested owner, I've seen several in-room and anechoic frequency response graphs of the Spendor SP1/2 series. I've never seen or heard anything that qualifies as the kind of dip in response you describe. I find my "E" version very neutral compared to many speakers in its price range.

Here is what the Harbeth web site has to say:

"There is much myth, folklore and misunderstanding about this subject.

"The 'BBC dip' is (was) a shallow shelf-down in the acoustic output of some BBC-designed speaker system of the 1960s-1980s in the 1kHz to 4kHz region. The LS3/5a does not have this effect, neither in the 15 ohm nor 11 ohm, both of which are in fact slightly lifted in that region."

It goes on to say that the "dip", when it was used, had the effect of making very near-field monitors sound slightly further away. This was effective in cramped quarters, but in reality none of the current Spendors or Harbeths are voiced in that manner.

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