hi, i want to build a bose soundlink style bluetooth speaker and have bought 4x B&C 2ndf26 because they have a good xmax to dept ratio and can handle a lot of power for a 2 inch speaker. the FS of the speakers are around 165 hz but with a dsp amplifier i can get them to 50 hz (95db). i don't know they are not made for 50hz but if i put them in winisd they recommend a box wich goes to 100hz, so pretty low. i already test them in a box and they sound clean and can handle 50 hz so i want to try them in a small bluetooth speaker. the bluetooth speaker i want to make has a netto volume of 1,1 liter so i have to give them 90 watt RMS. they are rated at 30 watt RMS x4 so they could handle 120 watt RMS. i have a amp that fits and the batteries are enough to get 6 hours out of it.
Now i have modelled a tangband w3-1876S in that same enclosure and it works twice as eficient at around 50 to 90 hz. the w3 can handle only 15 watt RMS, have more build in dept and only can go to 2000hz wich make it a bit harder to add a small tweeter and it's only 1 driver so i can't get stereo( i know it's not real stereo, but 4 speakers with 25 cm distance between them sound better as one driver in the middle i guess). now the question--> why is this, i know the w3 is build for 50hz so it makes sense, but the energy have to go somewhere. i know all parts of the speaker can affect this but how does this goes. the B&C 2ndf26 goes +- 3 DB less loud but does this mean they wasted half of the power or is the amplifier just working less because of some parameters of the speaker. i don't know if this is possible but they have the same VAS so where is the -3DB come from and where is the energy go to.
Now i have modelled a tangband w3-1876S in that same enclosure and it works twice as eficient at around 50 to 90 hz. the w3 can handle only 15 watt RMS, have more build in dept and only can go to 2000hz wich make it a bit harder to add a small tweeter and it's only 1 driver so i can't get stereo( i know it's not real stereo, but 4 speakers with 25 cm distance between them sound better as one driver in the middle i guess). now the question--> why is this, i know the w3 is build for 50hz so it makes sense, but the energy have to go somewhere. i know all parts of the speaker can affect this but how does this goes. the B&C 2ndf26 goes +- 3 DB less loud but does this mean they wasted half of the power or is the amplifier just working less because of some parameters of the speaker. i don't know if this is possible but they have the same VAS so where is the -3DB come from and where is the energy go to.
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