Hello, I am Ito of the Akihabara shop. I think that it is one yearning for many audio files what we do with the reproduction which enriched the middle range.
How a middle range is enriched, lengthening a range, I think you are worried about that.
DIATONE P-610. If you sounded vocal with this speaker, I do not know what is better than this. No other expensive speaker reproduces enrich middle range except P-610.
KM-610M put on the marketing in 1995 as a specification box of DIATONE P-610MA/MB, That size is 529mm in width 294x depth 259x height, There is only 27L.
. If you put into a bigger box, unexpected low-range will come out.
(Photo is P-610DB, 6.5 inch full range, Impedance: 8 ohms F range: 70〜20,000Hz Sound pressure level: 92 dB/W/m W325xH687xD400 41,790 yen (Including tax).
P-610 of the photograph in the Akihabara shop has height of the specification box of DIATONE. And content is large.
If you are tired to adjust of a large-sized speaker, Adjust by the full range speaker.