The design of active crossovers- Douglas Self wants your opinions - Page 29 - diyAudio
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Old 23rd October 2012, 05:02 PM   #281
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Very nice ...of full moons and capacitor rolling
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Old 23rd October 2012, 08:18 PM   #282
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Join Date: May 2012
Originally Posted by CharlieLaub View Post
I would be interested to know if the same effect happens if you set up the speakers in a different listening environment, e.g. differently shaped room and/or with a different amount of adsorbing material. My guess is that the room is reflecting some energy back to your listening position that generates a comb filtering type effect and this generates an ambience effect, giving the illusion that the soundfield is high.

Room response can be very, very influential on the sound of a loudspeaker!

Try it and report back please!

Room does have an influence. Lower flat ceilings 9 - 10 feet do not provoke the effect. The effect was clearly present in a room with a 20ft flat ceiling and also in a room with steeply sloping eaves as in a bungalow. The effect is not psychological and was simultaneously witnessed by many people not all being in the optimal listening position. If it was comb filtering the high ceiling would have had less. The image was extremely stable and did not wander unless stereo was panned. In this case the the image formed an arc between the speakers.
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Old 7th December 2012, 01:56 PM   #283
Telstar is offline Telstar  Italy
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Originally Posted by Pano View Post
(opamps) Who would use them for an active crossover in the 21st century, except as input and output buffers?
Yer right! We want to use discretes
"The total harmonic distortion is not a measure of the degree of distastefulness to the listener and it is recommended that its use should be discontinued." D. Masa, 1938
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Old 12th August 2014, 11:01 AM   #284
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Join Date: Mar 2012
The book is very well written and provides essential information on the subject. Have read articles by R. Elliott and the book by Mr. Self completes the picture on active XO nicely. Thanks a lot for the comprehensive work !
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