I am building HT speakers with FR drivers for LCRS. For drivers I have narrowed down to the FaitalPRO 4FE35 30W, 8 ohms, 91dB. My AVR is rated 50W, THD 0.08%, 2channel driven @ 8 ohms.
These drivers are also available in 16 ohms. I was thinking of using two 16ohm drivers in parallel ( to get an impedance of 8 ohms ) for the LR speakers. I want to do this because when I listen to music in 2.1 configuration on the AVR I can use the maximum available 2 channel power/wattage of the AVR.
Question - Will doing this nullify the point source advantage of a single full range driver speaker because my fear is that the throw of the two closely places drivers on the speaker will interact acoustically and smear the stereo imaging for 2 channel stereo music ?
These drivers are also available in 16 ohms. I was thinking of using two 16ohm drivers in parallel ( to get an impedance of 8 ohms ) for the LR speakers. I want to do this because when I listen to music in 2.1 configuration on the AVR I can use the maximum available 2 channel power/wattage of the AVR.
Question - Will doing this nullify the point source advantage of a single full range driver speaker because my fear is that the throw of the two closely places drivers on the speaker will interact acoustically and smear the stereo imaging for 2 channel stereo music ?
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I would say yes. But it wont "smear the stereo image" as much as creating interference patterns due to the proximity of the 2 drivers. It doesn't really "null" it but I would say it takes a good bite out of it. Use 5 these drivers in the same shape enclosure. See to that its a low diffraction box (round, smooth shape) - EQ it flat and enjoy some really good sound. Closed boxes. Add a good sub.
How big i your room and loud do you play. I think you will be surprised how loud a pair (or 5) of these can go.
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How big i your room and loud do you play. I think you will be surprised how loud a pair (or 5) of these can go.
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Also a point source will splash the floor and ceiling. I find the point source argument defeating the purpose.
Some people use two full rangers in a cabinet and roll one of them off at the baffle step frequency.
Billy, do you have any reference material that I could read to understand what is the reason and the benefit of doing this ?
91 dB sensitivity 1 m / 1 w ->
for every doubling of input power: +3dB (5,7x)
for every doubling of distance: -6 dB (2x)
=> 91+17-12=96 dB at listening position (with one speaker!! 4 more=> +12 dB=110) - plenty loud. Do you live in a flat? Forget 96dB or neighbours will bang your door 🙂
I assume the sensitivity figure is correctly stated by the producer.
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for every doubling of input power: +3dB (5,7x)
for every doubling of distance: -6 dB (2x)
=> 91+17-12=96 dB at listening position (with one speaker!! 4 more=> +12 dB=110) - plenty loud. Do you live in a flat? Forget 96dB or neighbours will bang your door 🙂
I assume the sensitivity figure is correctly stated by the producer.
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