Audio Speaker DesignFormulas for Calculating
Volume and Port DimensionsDriver Parameters Ro = Rmax / Re Rx = Re * ( Ro )1/2 Qms = Fqr * [( Ro ) / ( F2 – F1 )]1/2 Qes = Qms / ( Ro – 1 ) Qts = Qms / Ro Sd = 3.14159 * ( Dia / 200 )2 Cms =
[ 1 / ( 12.56636 * ( M / 1000 ) ) ] * [ (Fqr + Fqs) * (Fqr – Fqs) / (Fqr2* Fqs2) ] Vas = 140000000 * Cms * Sd2 EMP = Fqs / Qes L = X /6283.18 X = ( R2 – Re2)1/2 Sealed Enclosures Qts = Qes * Qms / ( Qms + Qes ) Fcb = Fs * [ ( Vas / Vb ) + 1 ]1/2 Qtc = Qts * [ ( Vas / Vb ) + 1 ]1/2 db = 20 * log10[ Qtc4 / ( Qtc2– 0.25 ) ] Fdb = Fcb * [1 – ( 1 / ( 2 * Qtc2 )]1/2 F3 = Fcb * [ ( a + (a2 + 4)1/2 ) /2 ]1/2
a = [ 1 / (Qtc * Qtc) ] – 2 Dual driver Qes = Qes / 2 Vas = 2 * Vas Quad driver Qes = Qes / 4 Vas = 4 * Vas Vented Enclosures Vb = 15 * Vas * Qts2.87 Fb = 0.42 * Fs / Qts0.9 F3 = 0.26 * Fs / Qts1.4 db = 20 * log10 [ 2.6 * Qts * ( Vas / Vb )0.35] Recalculations Fb = [ Vas / Vb ] 0.32 F3 = Fs * [ Vas / Vb ] 1/2 Single port Vb_in = Vb * 61.016949 R_in = 0.393701 * Dp / 2 Lp_in = [ ( 14630000 * R_in2 ) / ( Fb2* Vb_in ) ] - [ 1.463 * R_in ] Lp = Lp_in * 2.54 Dual port tramadol Dp = [(Dp * Dp) + (Dp * Dp)]1/2 - for calculation of Lp Dual driver Qes = Qes / 2 Vas = 2 * Vas dd = 68600.0152 / Fqx Dimension calculations y = [ (Vb * 1000) + (Vdr * 1000) / ( 1.618 *0.618 ) ]1/3 W = y H = y * 1.618 D = y * 0.618 3rd order 2 way Butterworthcrossover C1 = 106103 / ( Fc * Rt ) C2 = 318391 / ( Fc * Rt ) C3 = 212207 / (Fc * Rw) L1 = 119.37 * Rt / Fc L2 = 238.73 * Rw / Fc L3 = 79.58 * Rw / Fc 1st order 3 way crossover ratio = Math.round [ ( FqH / FqL ) – 1 ] FqL2 = ( FqL * FqH / ratio )1/2 FqH2 = FqL * FqH / FqL2 C1 = 159155 / ( FqH * Rt ) C2 = 159155 / ( FqL2 * Rm ) L1 = 159.155 * Rm / FqH2 L2 = 159.155 * Rw / FqL Attenuation network Rp = 10db/20 * Rt / ( 1 – 10db/20) Rs = Rt – [ ( 1 / Rp ) + ( 1 / Rt ) ]–1 Impedance compensation network Rc = 1.25 * Re C = 1000 * Ld / ( Rc * Rc )
Please see the Online Enclosure Calculators for definitions of variables. xanax |
