Ian Bell wrote:

Apart from the 90Hz peak this is not a million miles away from the
response of the average human ear so the speaker may in fact be
better than it sounds. The 25Hz surprise may well be a room
resonance artifact although you would need a rather big room to get a
large peak.

I've since had a play with a reflex cab design spreadsheet - I fiddled with
the desired cab resonance to get a reflex pipe about the same size as the
Concerto's - for my cab size, I got a close size match at 24.5Hz.


Whereabouts was the speaker when you did this test?

Played it through both speakers. Their sides are about 6" from the walls,
the backs have about 3' clear space behind. They're about 3'x2'x1 (H,W,D)
and sit on small concrete blocks. Concrete floors and walls.


--
Wally
www.art-gallery.myby.co.uk
Latest addition: Early Works gallery