I’ve built 2, 3, and 4 way speakers but now I’m building full range speakers with 10” drivers. I plan on building ported cabs and while looking at a number of designs I see many have an f3 around 35 to 40 hz.
is that the normal f3 for full range?
is that the normal f3 for full range?
Why do you ask is it normal? ..because I'd also add that 10" is not the average size for a full range driver.
I just don’t know if 40hz is sufficient. My current system is flat to 20hz with 4 subwoofers. It is only 2 channel and I can’t hear that low.
below 100hz seems like pressure to me.
I think lower, the better.
I know tuning my double 15's, there were 2 ports.
Both open, tuning at 40hz.
1 open around 27hz.
27hz seemed deeper, smoother, while 40hz tuning seemed thunky, like dance club thunk thunk thunk.
The 27hz seemed more like a smooth boom than an in your face thunk sound.
Are you ready for the 10" full range driver's lack of dispersion ?
I think lower, the better.
I know tuning my double 15's, there were 2 ports.
Both open, tuning at 40hz.
1 open around 27hz.
27hz seemed deeper, smoother, while 40hz tuning seemed thunky, like dance club thunk thunk thunk.
The 27hz seemed more like a smooth boom than an in your face thunk sound.
Are you ready for the 10" full range driver's lack of dispersion ?
If you really get 40Hz properly balanced in your room, you won't have cause for complaint. Subs can be worked in for even higher rolloffs than that.
For most mosuc a F3 of 40 is more than enough, an almost no music go below 30Hz. fullrange drivers are mostly used in music, not for HT where 20Hz or lower is the norm.
It's also very hard to get real bass out of a driver and at the same time real treble, that is why many drivers even don't go that low.
It's also very hard to get real bass out of a driver and at the same time real treble, that is why many drivers even don't go that low.
Ported cab with F3 of 40Hz and 24dB/oct rolloff will have F10 between 30-31Hz. More than enough for normal listening.
Btw, which 10in FR drivers you have?
Btw, which 10in FR drivers you have?
If you can either measure or simulate your room's gain, it'll give you a better idea of what LF target to aim for. I think lower is usually better, assuming no excessive sacrifice is made to achieve it, but a gradual and smooth roll-off will often better complement said room gain than a truly flat response. That means f3 may be higher, but f6 and/or f10 actually lower.
thanks guys. I ordered the parts for a cab with an f3 of 40hz. I'll start another thread of the build. Dennis.
Fane do a couple of full range drivers.
Fane 12-250TC and Fane 15-300TC
I have a pair of 250's in a sealed cabinet and they sound OK.
Fane 12-250TC and Fane 15-300TC
I have a pair of 250's in a sealed cabinet and they sound OK.
While your cab volume will be more or less fixed, the tuning can be adjusted over a certain range to achieve the response that complements your space. Is that the field-coil you posted about before? The drive voltage can also give you some leeway if doing it empirically by ear.
Just because the speaker is capable of reproducing 40 hz, you may not want to allow the speaker to reproduce that. The speakers may start to distort due to either doppler effects, or the voice coil leaving the gap. To prevent this distortion if it occurs, you may need to high pass them at some higher frequency.
These types of speakers start to beam at higher frequencies and you may find this quality annoying (I sometimes do). There are ways to try to address this.
Retsel
