Make sealed boxes and add EQ to reach 35Hz with your 10 or 12" drivers.
Keep the big woofers for OB. You'll need lots of cone area for OB
Keep the big woofers for OB. You'll need lots of cone area for OB
Haha, I was trying to demystify pass/notch filters sorry. The standard formulae required a calculator; simplified formulae for common 8ohm impedance 1st-order high-pass XO frequency ~ 20khz/uF (off by 0.5%, immaterial since typical LRC part only rated within 5%). Very high frequency above that gets "recovered" going through the capacitor; low frequency below baffle-step goes through the inductor; broad notch zone a combination of all three LRC running parallel.
Example WAW with notch filter to flatten mid-high but passing supertweeter frequency.
Example WAW with notch filter to flatten mid-high but passing supertweeter frequency.
Unless the driver has built in compensation in the response, like some of the Mark Audio drivers then you will definitely benefit from a circuit.
Just start with a calculator based on your baffle width. That’ll get your inductor value and then buy a handful of different resistor values and tune it by ear. You can just wire it outside of your finished speaker to the positive post. It probably won’t be completely optimized, but it’s an easy, cheap and fun way to substantially change the bass weight and brightness of your sound.
Thanks satz!
Referring to Tigeranand’s post earlier about speakers to go from 35htz to 16khtz…
This SB Acoustics driver is amazing 🤩… however I’m very doubtful that it will get to 16 khtz with any Authority…
If Convincing treble around 13=16 khtz is required, then a smaller “ Full range “ driver might be a better choice. ( As you plan to get the bass from a dedicated Bass driver).
Just my 2 cents worth…
Referring to Tigeranand’s post earlier about speakers to go from 35htz to 16khtz…
This SB Acoustics driver is amazing 🤩… however I’m very doubtful that it will get to 16 khtz with any Authority…
If Convincing treble around 13=16 khtz is required, then a smaller “ Full range “ driver might be a better choice. ( As you plan to get the bass from a dedicated Bass driver).
Just my 2 cents worth…
@Stanislav some questio about post #809. All dimenzion are about inside? Aperiodic vent is circle dimensio D=100 mm? Can You give some more information about making this box! Any information are welcome!!! I am interesting to make one pair! Two SB20FRPC80 are witing unpacked!!!
TIA!
TIA!
All dimensions are external.
I used 20mm plywood for the boxes.
The important bit is the internal volume, which needs to be 30L. That is your starting point.
If you add bracing inside, as I did, re-calculate dimensions to keep the volume @30L.
Aperiodic vent is indeed D=100mm, but that is not critical.
I used 20mm plywood for the boxes.
The important bit is the internal volume, which needs to be 30L. That is your starting point.
If you add bracing inside, as I did, re-calculate dimensions to keep the volume @30L.
Aperiodic vent is indeed D=100mm, but that is not critical.