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In the Forum: Playback Listening
In the Thread: Remedies the Beauty
Post Subject: Not so fastPosted by N-set on: 10/30/2022
Found this old experiment of Romy:
http://www.goodsoundclub.com/Forums/ShowPost.aspx?PageIndex=1&postID=26298#26298
Dannoy + 2x active paralleled ScanSpeaks in a sealed box of unknown tuning freq, both speakers powered from the same amp, unfiltered (the blue curve). Not sure if he ever continued this experiment. But looks like the numbers don't lie and two paralleled ScanSpeaks needed just to match the 92dB sensitivity of the Red (not relying on the boundary effects though), so anything smaller is a no-go. Furthermore, as I understand the passive operation, adding a passive Scanspeak to the sub will +/- reproduce the LF slope and the null of the Dannoy (the red curve) so the net reinforcement looks close to zero, unless I'm missing sth. Plus various rules of thumb say the passive area should be bigger than the active (not followed in the Dannoy though), so probably for two active ScanSpeaks, a bare minimum two passive will be needed, making the whole sub box quite a tower already. Hmm...
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