The high Q of this driver makes it go very low in a bigger box, and the bass is very articulated . My speaker has 31 liter box volume and a Monacor BR60 tube . This gives a tuning frequency of the speaker at 35 Hz .
At this frequency, the chn110 is standing still while all sound comes from the port, allowing rather high spl down to about 30 Hz .
I combine this with a dsp high pass crossover set at 33 Hz 24db/oct with the help of a WiiM ultra .
This speaker can play louder in the deep bass than my former SAM 8340 speaker.
I see a lot of constructions with horn loading and that’s fine, but you have an advantage with the backpressure from the tube in a ported speaker, lowering distortion significantly in the bass area.
At this frequency, the chn110 is standing still while all sound comes from the port, allowing rather high spl down to about 30 Hz .
I combine this with a dsp high pass crossover set at 33 Hz 24db/oct with the help of a WiiM ultra .
This speaker can play louder in the deep bass than my former SAM 8340 speaker.
I see a lot of constructions with horn loading and that’s fine, but you have an advantage with the backpressure from the tube in a ported speaker, lowering distortion significantly in the bass area.
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With a high Q driver like chn110 one can tune the speaker below the fs frequency of the driver , this is not the case with a low Q driver.
Scottmoose can probably write more info on this .
Scottmoose can probably write more info on this .
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Right, the break point is ~0.403 Qts'.........
FYI/FWIW, IME and proved to my satisfaction when 'proofing' MJK's MathCad design programs against some of my own Tower/Column alignments from 'way back when', the vented TL (closed pipe) alignment (aka MLTL) range from ~0.312 - 0.624 Qts' seems technically good enough, i.e. from Keele's 6th order assisted bass reflex to his Extended Bass Shelf (EBS) alignment.
While the 'sweet spot' (mean) is a ~0.4412 Qts', a 'close enough' simple guideline is:
~0.403, Vb = Vas, Fb = Fs
~ <0.403, Vb = < Vas, Fb = > Fs
~ >0.403, Vb = > Vas, Fb = < Fs
Keeping in mind that one has to factor in the (huge) impact thermal power, inductive distortion can have on effective Qts, the dominant vented box alignment factor.
(Qts'): (Qts) + any added series resistance (Rs)
FYI/FWIW, IME and proved to my satisfaction when 'proofing' MJK's MathCad design programs against some of my own Tower/Column alignments from 'way back when', the vented TL (closed pipe) alignment (aka MLTL) range from ~0.312 - 0.624 Qts' seems technically good enough, i.e. from Keele's 6th order assisted bass reflex to his Extended Bass Shelf (EBS) alignment.
While the 'sweet spot' (mean) is a ~0.4412 Qts', a 'close enough' simple guideline is:
~0.403, Vb = Vas, Fb = Fs
~ <0.403, Vb = < Vas, Fb = > Fs
~ >0.403, Vb = > Vas, Fb = < Fs
Keeping in mind that one has to factor in the (huge) impact thermal power, inductive distortion can have on effective Qts, the dominant vented box alignment factor.
(Qts'): (Qts) + any added series resistance (Rs)
Not much I can add [no surprise there 😉 ] to what GM has said there. The only two notes I'd make are
a/ A [well-designed] bass horn is always the most efficient back-load for a given tuning, or I suppose more accurately, it offers the potential for that. It's related to a vented box, they just happen to be moving in opposite directions on a sliding scale
b/ Vented loading, like anything [whatever variation] only goes so far. Using the example here, CHN-110 was designed to want by current standards a relatively large enclosure for its size & offer the potential for decent LF extension. And you can certainly get that, as GM shows above, & the various boxes I've done for it are meant to demonstrate. The price for that can be power handling, unless you start introducing some slightly broader-band loading -which takes us back to pipes, horns &c.
a/ A [well-designed] bass horn is always the most efficient back-load for a given tuning, or I suppose more accurately, it offers the potential for that. It's related to a vented box, they just happen to be moving in opposite directions on a sliding scale
b/ Vented loading, like anything [whatever variation] only goes so far. Using the example here, CHN-110 was designed to want by current standards a relatively large enclosure for its size & offer the potential for decent LF extension. And you can certainly get that, as GM shows above, & the various boxes I've done for it are meant to demonstrate. The price for that can be power handling, unless you start introducing some slightly broader-band loading -which takes us back to pipes, horns &c.