In Reply to: Building a pair of 2 Pi in solid pine? posted by Erik Johansson on July 14, 2002 at 06:13:59:
Hi Eric,
I’m just doing this: I rebuild my 2 Pi (chipboard 2Pi box)
with 27 mm solid pine.
I changed also dimensions to tower-like look:
internal dimensions respects the ratio 1:1.402:1.202
(which is known as very good sounding).
I multiplied 1.202 by factor of 3 (allowed) so my box is internally
204 x 292 x 734 mm (43.5 liter, minus Alpha-10 1L and braces 2L).
The tweeter is golden-placed (asymmetrically, 0.618 from the top, 1.000
from one side and 1.618 from another side - this improve imaging).
Alpha-10 is also placed at the 1/3 of internal height.
My port is 50 mm internally and lengths from 40 mm to 100 mm works
fine. Varying the length of the port has more impact on the midrange clarity than on the bass extension (?!)The first one is ready and playing (not glued, no braces and no
stuffing material at the moment). Sound ? Very promising, but
I prefer to spend some time to critical listening before review it.Photos will be available soon.
Vladimir.
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