- Driver Selection -
Since most of my specific goals for this project deal with power
handling, excursion, and bass response, the woofer selection
was my first area of concern. My first hunch was to follow the
lead of the classic speakers and use 15" woofers, but I didn't like
what that would do for me from an aesthetic standpoint. Trying to
modernize the design somewhat, a dual woofer design seemed
appropriate. In looking through the available options, the Dayton
Shielded DVC woofers were a great choice because of their
robust construction and ability to net an 8 ohm nominal load.
Since the 12" woofer only requires a slightly larger cabinet than
the 10" and is only marginally more expensive, I decided on a
pair of the SD315-88 woofers per cabinet.
I knew that the most limiting requirement in terms of mid range
selection was the sensitivity issue, especially knowing it needed
to play fairly low and also maintain an 8 ohm overall impedance.
(Not many home audio cone based midranges or mid-woofers
have real-world sensitivities that high.) An exception that I found
was the Tang Band W6-789S 6-1/2" shielded woofer, I tested
and confirmed that it does indeed have a real-world sensitivity
of about 91-92 dB. In addition it has a smooth and extended
frequency response that would make crossover design easier.
Since both my woofers and midrange ended up being shielded,
I decided that I should carry this theme through to the tweeter
selection. While magnetic shielding wasn't one of my initial
design goals, I figured it would be a nice extra bonus and add
that much more versatility. Looking for a tweeter with high
sensitivity, shielded construction, and a somewhat lively sound,
this led me to the Dayton DC25TS-8 1" Titanium dome tweeter.
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