Showing posts with label subwoofer. Show all posts
Showing posts with label subwoofer. Show all posts
Monday, November 18, 2013
Subwoofer amplifier schematic diagram
Amplifier circuit is very suitable for use in subwoofer speaker, because its strong. This circuit using ic, ic based on STK. to use it can be used on cars that use speakers or a subwoofer system in his car. 30 V supply voltage that has been rectified. Power output 20W mono.
Part List :
R1 = 100K
R2 = 47R
R3 = 100R
R4 = 1R
C1 = 220uF
C2 = 100uF
C3 = 100uF
C5 = 10uF
C6 = 1uF
C7 = 1uF
C8 = 1000uF
C9 = 0.1uF
IC = STK011 , STK015 , STK016
Friday, October 25, 2013
Differences subwoofer and woofer speakers
In the world of electronics, especially in terms of audio must be familiar with the term speaker, be it a woofer or subwoofer. Each of these types of speakers choose a variety of characteristics and differences. Here will be explained a little about subwoofe speakers and woofer speakers, so we can find out where the fine for use as needed.
 |
| Subwoofer Speaker |
Subwoofer is a bass speaker system yangg could produce a lower frequency than usual with an additional woofer low pass filter.Walaupun sub-woofer does not have to wear two opposite poles mounted speakers, a good sub-woofer is that using 2 woofers for the volume remains loud. Sub woofer with the woofer does not always have a special, because ordinary woofer can be built into the subwoofer, by adding an amplifier low pass filter. Sound system (sound system) even if only to include a sophisticated subwoofer, along with some other speakers.
And in other words, the difference in bass speaker (woofer) with speaker Sub Woofer:By description SUB word, it means the speaker must be able to handle bass tones below.
Bass speakers can use the speakers with her without a rubber edge cones.
Speaker Sub Woofer, using cones with rubber edges, so its more flexible movement of cones.
Performance of all speakers (tweeter, Middle, woofer or sub woofer) strongly depends on the source signal and Pre Amp and Power of his amps. So if not supported by all three of these factors, it will not produce a good tone (tone control).
Regarding his Ohm, 100%, depending on its output amps.
Like the amps in the car, the output is 4 ohms, while the home is generally 8 ohm amp, but there is also a distinguished 16 ohms. So adjust the speakers to the amplifier.
So the key difference lies in the low tones (bass) are produced. Subwoofers capable of producing a low tone below the average normal woofers, and the tone is also more melodic and soft . So what can I share, may be useful to visitors all. Thank you
Thursday, October 24, 2013
Differences subwoofer and woofer speakers
In the world of electronics, especially in terms of audio must be familiar with the term speaker, be it a woofer or subwoofer. Each of these types of speakers choose a variety of characteristics and differences. Here will be explained a little about subwoofe speakers and woofer speakers, so we can find out where the fine for use as needed.
|
| Subwoofer Speaker |
Subwoofer is a bass speaker system yangg could produce a lower frequency than usual with an additional woofer low pass filter.Walaupun sub-woofer does not have to wear two opposite poles mounted speakers, a good sub-woofer is that using 2 woofers for the volume remains loud. Sub woofer with the woofer does not always have a special, because ordinary woofer can be built into the subwoofer, by adding an amplifier low pass filter. Sound system (sound system) even if only to include a sophisticated subwoofer, along with some other speakers.
And in other words, the difference in bass speaker (woofer) with speaker Sub Woofer:By description SUB word, it means the speaker must be able to handle bass tones below.
Bass speakers can use the speakers with her without a rubber edge cones.
Speaker Sub Woofer, using cones with rubber edges, so its more flexible movement of cones.
Performance of all speakers (tweeter, Middle, woofer or sub woofer) strongly depends on the source signal and Pre Amp and Power of his amps. So if not supported by all three of these factors, it will not produce a good tone (tone control).
Regarding his Ohm, 100%, depending on its output amps.
Like the amps in the car, the output is 4 ohms, while the home is generally 8 ohm amp, but there is also a distinguished 16 ohms. So adjust the speakers to the amplifier.
So the key difference lies in the low tones (bass) are produced. Subwoofers capable of producing a low tone below the average normal woofers, and the tone is also more melodic and soft . So what can I share, may be useful to visitors all. Thank you
Friday, October 4, 2013
Tone control include subwoofer out
PT2350 is a tone control subwoofer cross-over low pass filter chip utilizing CMOS Technology. It features a tone control range of + 10dB (50Hz, 4 KHz) and subwoofer low pass filter of the second order Sallen Key Design. The roll-off point can be adjusted by changing the value of the external capacitor. Pin assignments and application circuits are optimized for easy PCB Layout and cost saving advantages.
CMOS Technology
2-Channel Input
3-Channel Output (Including 1 stereo Output and Subwoofer Output)
Low Total Harmonic Distortion (THD<0.01%, Subwoofer THD<0.2%)
High S/N Ratio (S/N Ratio <-87dB, A-weighting)
Least External Components
Adjustment of Frequency response by changing the value of the external component
Single Power Supply: 3 to 8.5 Volts
Available in 20 pins, DIP or SO Package
PARTS
Resistors
2------ R1,R2-------------- --------- 10k / 1% / metal film
Capacitors
2------ C9,C10------------- -------- 4.7nF / 63V / polyester / raster R. 5mm
3------ C1,C7,C8-------- ----------- 47nF / 63V / polyester / raster R. 5mm
1------ C16---------------- --------- 100nF / 63V / polyester / raster R. 5mm
1------ C13----------------- -------- 220nF / 63V / polyester / raster R. 5mm
2------ C3,C4------------- --------- 2.2uF / 50V / polyester / raster R. 5mm
5------ C5,C6,C11,C14,C15--- 3.3uF / 100V / electrolytic / vertical / raster R. 5mm
1------ C12-------------------------- 10uF / 35V / 105C / electrolytic / vertical / raster R. 5mm
1------ C17----------------- --------- 100uF / 16V / 105C / electrolytic / vertical / raster R. 5mm
1------ C2---------------------------- 470uF / 35V / electrolytic / vertical / raster R. 5mm
Integrated Circuits
1------ U1---------------------------- 78L08 / +8V voltage regulator / TO-92
1-------U2---------------------------- PT2350 / stereo tone control, subwoofer low pass filter IC / DIP20
Diodes
1------ D1---------------------------- 1N4153
Miscellaneous
1------ J1----------------------------- 2 pole wire connector (terminal block) to pcb / raster r. 5 mm / hight 9.7 mm
1------ P1----------------- ----------- 10k log stereo potentiometer / 6 mm saft
2------ P2,P3------------------------ 100k lin stereo potentiometer / 6 mm saft
5------ J2 to J5---------------------- RCA female to PCB, straight, Hosiden any colour
NOTICE ABOUT J2 to J18 . if you make one stereo input device you need 5 pcs of RCA female as listed in parts list
If you make 2 x 6 input device, you need total quantity of 15 pcs RCA female and also 2 x 6 changeover switch.
Code of J2 to J18 RCA female to PCB, straight, Hosiden, any colour
SW1 2 x 6 changeover High quality DIP rotary switch to PCB 2 x 6, Alcos witch DRS 2-6, 3.2mm saft
Frequency response of tone control unit is flat between 20 Hz … 20 kHz when treble and bass pots are in middle.
Overall gain is approx. 6 dB when treble and bass pots are in middle.
Treble and bass tone control range is approx. 10 dB (50Hz / 4 kHz) with given component values.
Subwoofer cut off frequency can be adjusted by bass potentiometer… with component values as listed above it is as follows : bass pot in minimum (left) -3dB point, 240 Hz / -12dB 450 Hz, bass pot (middle) -3dB point 100 Hz /-12dB 200 Hz, bass pot maximum (right) -3dB point 60 Hz / -12dB 120 Hz.
Distortion was < 0.1 % when input level was < 0.3V rms.
There is no balance adjustment potentiometer in this application, if you need balance, you must add it separately in this device.
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