I think sb12pac sounds just fantastic!
but as always, it does not matter how good things are, we just want more, in my case i want a tad more bass reach, not much, only slightly
a small 4.5" midwoofer with a free air resonace at ~45hz and total Q of 0.3 would suit my needs perfect, any ideas?
but as always, it does not matter how good things are, we just want more, in my case i want a tad more bass reach, not much, only slightly
a small 4.5" midwoofer with a free air resonace at ~45hz and total Q of 0.3 would suit my needs perfect, any ideas?
Get modelling different 4" drivers and see which ones will give you what you want. I'd start with the SB12 ceramic and metal drivers. The W12CY magnesium cone from seas will probably do quite well too.
I have looked quite a bit in this area. I think 12 PAC is as more or less as low as it goes for a midwoofer. Beyond that they are called subwoofers. I see some from Tangband. Only thing is expanding the box and you can tune the port all the way down to 50Hz...
Oon
Oon
Something like the peerless 830855 might do bass in a smaller ported enclosure, but at 4 inches, there are going to be a lot of tradeoffs. I would say the sb12pac is better overall, and if you make a solution that comfortably reaches 80hz, turning it into a 2.1 setup is a much better idea if it needs to be compact
The other angle would be to use the 12PAC passive radiator. Might allow for more bass and a small cabinet. But you will need to simulate it properly.
Oon
Oon
The 12PAC PR will not help. With a single it's useless but 2 helps but fine tuning is an issue.
Better to increase the Fb to give the roll off a hump which gives a more balanced bottom end. I've tuned mine to 78Hz which gives an F3=72Hz.
See pic... green vented, purple PRx2.
I've used a few 4" midwoofers such as the 830870, NE123W-08 but they don't go lower. The best for a bit of more bottom end is SB12NRX25-4 as it can give an F3 below 60Hz. Look at Jeff Bagby's article on the Soprano and note the suggested vent tuning to give a roll off hump.
Better to increase the Fb to give the roll off a hump which gives a more balanced bottom end. I've tuned mine to 78Hz which gives an F3=72Hz.
See pic... green vented, purple PRx2.
I've used a few 4" midwoofers such as the 830870, NE123W-08 but they don't go lower. The best for a bit of more bottom end is SB12NRX25-4 as it can give an F3 below 60Hz. Look at Jeff Bagby's article on the Soprano and note the suggested vent tuning to give a roll off hump.
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The seas excel driver looks excellent, but i doubt that official t/s parameters are correct, has anyone measured this driver?
Thank you! Just as i thought, slightly high fs and qts so the low end response will not really meet my needs, to bad for otherwise nice driver (excel magnesium)
Do you know the Wavecor SW118WA02 ?
f3 = 42 Hz in 6 liters or 48 hz in 4,6 liters
http://www.wavecor.com/Wavecor_SW118WA02_enclosure_simulations.pdf
But you need a tweeter that can reach 1200 hz like this : TW030WA11
The following project is based on these 2 drivers and get very good reviews in Germany :
Bernd Timmermanns’ Micro Block MK2 compact loudspeakers – audio at home
f3 = 42 Hz in 6 liters or 48 hz in 4,6 liters
http://www.wavecor.com/Wavecor_SW118WA02_enclosure_simulations.pdf
But you need a tweeter that can reach 1200 hz like this : TW030WA11
The following project is based on these 2 drivers and get very good reviews in Germany :
Bernd Timmermanns’ Micro Block MK2 compact loudspeakers – audio at home
Thank you, i ditched the small speaker for a massive 12” eminence coaxial system instead 🙂 but it does not work yet however
In the mean time i running a pair of sb16 coaxials, and i think they sounds superb
In the mean time i running a pair of sb16 coaxials, and i think they sounds superb