Now that the engine noise is under control, it makes sense to add some
speakers to go with the Sony Receiver. My first effort was to mount
Blaupunkt 4 in. two way speakers under the dash which puts them out of
sight, looses the high frequencies and muffles the mid-range. There is
no bass from 4 in. speakers that are not in an enclosure.
After a conversation with my brother Pete who was facing a similar
problem on a new Honda that did not come with any radio, I purchased a
pair of 5752cf Infiniti Reference speakers to put behind the front
seats and the Infiniti 505cs components for the front. The latter
consists of 5 1/4 in. for the low end, a 1 in. diameter tweeter for
the high end and a companion crossover. The former are 5 x 7 in. two
The 5 1/4 in. replaced the old 4 in. under the dash. I mounted the 1
in. tweeters at each end of the aluminum dash panel.
The 5 x 7 in. were mounted in custom boxes that I designed to set on
the floor behind the front seats.
The results are quite good according to my old ears, which I guess is
not much of a testimonial. Sitting in the car with the engine off it
sounds just as good to me as the factory upgrade radios in either the
Boxster or the Disco. Full range and clean from distortion. Flat
frequency response? How could that be true?
Last modified: Sun, 02 Jul 2000
||The rear speakers were designed to fit in the foot well behind the
front seats, leading to sealed boxes made from 3/4 in. plywood covered
with some carpet. Grills did not come with these speakers, so I made
||Here are the two rear speakers in place behind the front seats. To
keep the speaker boxes from sliding around on the floor, a metal bar
is screwed to the box. The bar is bent so that the loose end will
slide into the package tie-down strap fitting in at the back of the
||The old 4 in. speaker mounting boards were modified for the new 5 1/4
in. speakers by adding a wooden ring made from 3/4 in. plywood. These
speakers point toward the floor which is certainly not optimum
placement. However, there are few choices that do not involve cutting
||Here is the left side 5 1/4 in. speaker mounted under the dash. Best
practice says to keep the sound from the back of the speaker from
meeting and canceling the sound from the front of the speaker. This is
a bit tough to accomplish for this mounting technique. As a result the
sound can not be optimum.
||And finally here is the left side 1 in. tweeter mounted on the end of
the dash with a piece of Velcro. The high frequency music from the
old speakers beamed to the floor was largely lost. These little
speakers help that problem considerably. There is a crossover included
with each of the front speaker pairs that was mounted under the dash.