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Why ScanSpeak tweeters aren't the
same |
"The dealer told me the 9500 and 9700 can work fine from the same
crossover....".
Above the 9500, 9700 and 9900 on the same baffle (SP95 front panel). It will look different on another baffle or with another position on the baffle, but it doesn't change the fact that there are significant differences in frequency response of the two drivers. The 9500 is the more sensitive tweeter of the three. So, how will it look if we apply the same crossover to the two tweeters? See below.
Above the 9500, 9700 and 9900 from same 3rd order crossover (3k/3rd order LR). Quite some difference, actually 3-5 dB at 5-10 kHz.
Above the 9500, 9700 and 9900 targeting the same SPL around 90 dB. As
can be seen from the schematics, there are major differences in
crossover component values to render the same response. The 9700
response is slightly equalised by the input series coil. Due to the flat
impedance of the 9700 this rising response cannot be handled by the more
common RC-circuit across tweeter terminals. |