- #SPEAKER ENCLOSURE DESIGN PRINCIPLES DRIVERS#
- #SPEAKER ENCLOSURE DESIGN PRINCIPLES DRIVER#
- #SPEAKER ENCLOSURE DESIGN PRINCIPLES SOFTWARE#
These formulas were produced by Garry Margolis in 1981 in JAES (Journal of the Audio Engineering Society) and to our opinion constitute the most practical design procedure we can get from mathematical analysis of woofer suspension mounted on a speaker enclosure. Max RMS power: estimated maximum RMS power input to speaker due to woofer cone displacement limitation (Watt)Īs explained in the diagram on the right, parameters in red are input while those in blue are derived by the design formulas presented. * We suggest a moderate value of Qtc=1.0. * Values more than 1.2 produce detectable bass response peaks of more than +2dB. * SPL response curve becomes less steep for values less than 1.0. Its value affects bass response and control.
#SPEAKER ENCLOSURE DESIGN PRINCIPLES DRIVER#
Qtc: overall quality factor of woofer cone oscillation with driver mounted on final enclosure. Peak SPL: estimated peak response value (dB) with respect to flat alignment. Qts: total quality factor of woofer driverį3: estimated speaker cutoff (-3dB) frequency (Hz) Vas: suspension compliance equivalent volume (m3) We prefer setting this value to 1.0 which increases bass SPL output around the cutoff frequency : CLOSED BOX, STEP 1:įsb: woofer suspension resonance frequency (Hz)įc: estimated speaker resonance frequency (Hz) Decades of speaker design were based on the theoretically ideal value of 0.707. Second Order responses feature a (total) quality factor which decides their exact shape. The heart of our approach is the fact that the shape of the SPL response at very low frequencies is that of a Second Order High Pass System as explained in a previous tutorial. > 300Hz (3way) or 700Hz (2way) sensitivity estimate
> max RMS power due to displacement limitation The following table gives a general picture of what is needed for this part of the design protocol and what is expected to be derived: PART 2: Deep knowledge of the underlying theory helps us understand which parameter must be altered to get the desired change.
#SPEAKER ENCLOSURE DESIGN PRINCIPLES SOFTWARE#
The answer is no, as far as I am concerned ! Because using such a software involves decision-making concerning too many possible changes in enclosure dimensions and driver placement coordinates. Can we just start using such a simulation program and let all the theory of the past decades aside ? Some of them attempt to simulate the effect of the diffraction SPL step (or loss) that rises from the finite (not very large as in the case of the infinite baffle condition) dimensions of the enclosure. There are several pieces of software that simulate the low frequency behaviour of woofers in Closed Box designs, giving estimates of system SPL responses in the range 10Hz-1000Hz. We also have a rough estimate of the required (internal) volume of our CB enclosure.
#SPEAKER ENCLOSURE DESIGN PRINCIPLES DRIVERS#
We have already chosen our loudspeaker drivers and therefore have their datasheets along with their dimensions and TS (Thiele Small) parameters. This part is dedicated to Closed Box (CB) design. Details THE DESIGN PROTOCOL: PART 2a,CB-LOW FREQUENCY TUNING
0 kommentar(er)
