MTX Mobile Audio - Education

MTX Car Audio - MTX delivers classic, high performance car, home and professional audio products geared toward audio fans of all ages and listening preferences. This web site makes use of Macromedia^®Flash^TM software. You have an old version of Macromedia Flash Player that cannot play the content we've created.
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Length
inch	to	millimeters	X 25.4
inch	to	centimeters	X 2.54
inch	to	Meters	X .0254
inch	to	feet	X .0833
millimeters	to	centimeters	X .100
millimeters	to	feet	X .00328
millimeters	to	inch	X .03937
millimeters	to	meters	X .00100
centimeters	to	millimeters	X 10.0
centimeters	to	feet	X .0328
centimeters	to	inch	X .3937
centimeters	to	meters	X .0100
feet	to	centimeters	X 30.48
feet	to	inch	X 12.0
feet	to	meters	X .3048
feet	to	millimeters	X 304.8
meters	to	centimeters	X 100
meters	to	inch	X 39.37
meters	to	feet	X 3.28
meters	to	millimeters	X 1000

Area
inch^2	to	centimeters^2	X 6.452
inch^2	to	feet^2	X .006944
inch^2	to	millimeter^2	X 645.2
inch^2	to	meter^2	X .0006452
centimeter^2	to	inch^2	X .1550
centimeter^2	to	feet^2	X .001076
centimeter^2	to	millimeter^2	X 100
centimeter^2	to	meter^2	X .0001
millimeter^2	to	inch^2	X .001550
millimeter^2	to	centimeters^2	X .0100
millimeter^2	to	feet^2	X .00001076
millimeter^2	to	meter^2	X .000001
meter^2	to	inch^2	X 1550
meter^2	to	centimeters^2	X 10000
meter^2	to	feet^2	X 10.76
meter^2	to	millimeter^2	X 1000000
feet^2	to	millimeter^2	X .000929
feet^2	to	centimeter^2	X 929.0
feet^2	to	inch^2	X 144.0
feet^2	to	meter^2	X .0929

Volume
inch^3	to	feet^3	X .0005787
inch^3	to	centimeters^3	X 16.39
inch^3	to	meters^3	X .00001639
inch^3	to	liters	X .01639
feet^3	to	centimeters^3	X 28320
feet^3	to	inch^3	X 1728
feet^3	to	meters^3	X .02832
feet^3	to	liters	X 28.32
centiimeters^3	to	inch^3	X .06102
centiimeters^3	to	feet^3	X .00003531
centiimeters^3	to	meters^3	X .000001
centiimeters^3	to	liters	X .001
liters	to	centimeters^3	X 1000
liters	to	inch^3	X 61.02
liters	to	feet^3	X .03531
liters	to	meters^3	X .001

Electronics
In many electrical circuits, the values of components are specified in units with prefixes. This makes the numbers easier to handle without long strings of zeros.
mega	=	X 10^6
kilo	=	X 10^3
milli	=	X 10^-3
micro	=	X 10^-6
nano	=	X 10^-9
pico	=	X 10^-12

E	=	Potential Difference (volts)	I	=	Current (amperes)
R	=	Resistance (ohms)	P	=	Power (watts)

Potential Difference (volts)
I X R
SQRT( P X R )
P / I

Current (amperes)
E / R
P / E
SQRT ( P / R )

Resistance (ohms)
E / I
E^2 / P
P / I^2

Power (watts)
E X I
I^2 X R
E^2 / R

Resistances in series
RT = R1 + R2 + R3 .... + Rn

Resistances in parallel
1/RT = 1/R1 + 1/R2 + 1/R3... + 1/Rn

Resistances in parallel
(2 components)
RT = (R1 X R2) / (R1 + R2)

Capacitances in series
1/CT = 1/C1 + 1/C2 + 1/C3... + 1/Cn

Capacitances in parallel
CT = C1 + C2 + C3 .... + Cn

6dB High Pass
Series Cap = .159 / ( Impedance X Frequency )

6dB Low Pass
Series Inductor = Impedance / (6.28 X Frequency )

12dB Butterworth (high and low pass)
Capacitor = .1125 / ( Impedance X Frequency )
Inductor = ( .2251 X Impedance ) / Frequency

Attenuation Circuit

Attenuation in dB	2 Ohms		4 Ohms		8 Ohms
Attenuation in dB	R1	R2	R1	R2	R1	R2
1	.25	16	.5	33	1	60
2	.5	7.5	.8	15	1.6	31
3	.66	5	1.2	10	2.5	20
4	.75	3.4	1.5	6.2	3	13
5	.83	2.5	1.7	5	3.4	10
6	1	2	2	4	4	8
7	1.1	1.8	2.2	3.4	4.3	6.6
8	1.2	1.4	2.5	2.75	5	5.2
9	1.3	1.2	2.5	2.2	5.2	4.3
10	1.4	.83	2.75	1.87	5.5	3.75

Zobel Network

Resistor = 1.25 X Re
Capacitor = Inductance / Resistor2

Series Notch Filter

Capacitor = .1592 / ( Re X Qes X Fs )
Inductor = (.1592 X ( Qes X Re ) ) / Fs
Resistor = Re + ( ( Qes X Re ) / Qms )

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