3 Way Active Loudspeaker gr

3-Way Active Loudspeaker

3_way_active_lsp_crossover.gif (13294 bytes)

�� �� 2 ��, �� 3 ��. � �� , �� . � �� , �� crossover 3 �� Butterworth �� 200�� 3500��, �� 12dB/oct. �� , �� Fig.5. �� crossover �� crossover 3 �� 24dB/oct. �� , �� J2A �� J2B. �� J2A �� 8 pin �� crossover �� . �� flat �� J2A �� J2B. �� 15V �� crossover �� . �� . �� , �� , �� . �� , �� . �� TR1-2 �� , �� .

Part List [Fig.1]

R1=47Kohms	R19-20=47ohms		C17-18=47uF 25V
R2=1Kohms	C1=2.2uF 63V MKT		TR1-2=47Kohms trimmer
R3=4.7Kohms	C2=220pF		IC1=TL071
R4-11-13-15-17=NC	C3-4-11-12=100nF 63V MKT		IC2-3=TL072-NE5532
R5-6=12Kohms	C5-6-9-10=10nF 63V MKT		J1=2pin conn. 2.54mm pin step
R7-8=120Kohms	C13=6.8nF 63V MKT		J2A=8pin conn. 2.54mm pin step
R9-10=220Kohms	C14=3.3nF 63V MKT		or 8 pinhead 2.54mm pin step*
R12-14=10Kohms	C15=33nF 63V MKT
R6-18=33Kohms	C16=18nF 63V MKT		All Resistors is 1/4W 1%
	Typical specifications
	Input sensitivity	1Vrms
	Input impedance	47K
	High Pass filter	20HZ-:-200HZ
	Band Pass filter	200HZ-:-3500HZ
	Low Pass filter	3500HZ-:-20KHZ
	Slope	-12dB/oct

3_way_active_lsp_protection.gif (21482 bytes)

�� [Fig.2] �� , �� �� 2 ��, �� . �� , �� [RL2]. �� RL1 �� , �� IC5-6, �� RL2 �� IC7. �� 15V �� crossover �� crossover.

Part List [Fig.2]

R1=470ohms 1W	C4=10uF 25V	IC1=4093
R2-3=1Mohms	C5=1uF 25V	IC2=7812
R4=22Kohms	C6=4.7uF 25V	IC3=7815
R5-21=33Kohms	C7-8-10-11-13-14=33uF 63V	IC4=7915
R6-8-16=15Kohms	C9-12-15=22uF 16V	Q1-2=BD678
R7-9-17=56Kohms	C16-17=2200uF 25V	Q3-4-5=BC550C
R10-23-18=56Kohms	C22-23=10uF 25V	RL1-2=12V RELAY G2R2 [OMRON]
R11-12-19=10Kohms	D1-2-3-4=1N4002	J2B=8pin conn. 2.54mm pin step
R14-15-20=3.9Kohms	D5=8.2V 1W Zener	J3B=3pin conn. 2.54mm pin step
R22=1Kohms	D6-7.....26=1N4148	J8A-B=2pin conn. 2.54mm pin step male-female
C1=100uF 25V	D27=Led 5mm	J8A-B=2pin conn. 2.54mm pin step male-female
C2-3-18-19-20-21=100nF 63V MKT	BR2=BRIDGE RECT. 80V 1.5A	All Resistors is 1/4W 1-5%

3_way_active_lsp_power.gif (30880 bytes)

�� Fig.3, �� . � �� STK4044XI �� SANYO �� 100W �� , �� . � �� . � �� XI �� , �� II �� V. �� [V �� II] �� . �� RLF1�3 �� 10R 3W, �� 30 �� , �� , �� 1mm. �� C66�.69 �� .

Part List [Fig.2]

R23-33-43-32-42-52=1Kohms	RLF1...3=FILTER* See text		C32-46-50=1nF 63V MKT
R24-34-44=47Kohms	C24-38-52=330pF		C33-37-47-51-63-65=100uF 63V
R25-26-35-36-45-46=100ohms	C25-39-26-40-54=1uF 63V MKT		C34-48-62=220uF 25V
R27-37-47=1Kohms	C53=2.2uF 63V MKT		C35-36-49-50-61-64=10uF 63V
R28-38-48=0.22ohms 5W	C27-28-42-56-41-55=100pF		C66-67-68-69=15000uF 63V
R29-39-49=4.7 ohms1W	C29-43-57=100pF		IC5-6-7=STK4044XI* See text
R30-40-50=56Kohms	C30-44-48=15pF		F2-3=Fuse 5A Fast 5X20mm+PCB case
R31-41-51=10Kohms	C31-45-59=100nF 100V MKT		J4A-5A-6A=2pin conn. 3.96mm pin step

	Typical specifications
	Input sensitivity	1Vrms
	Input impedance	47K
	Output Power (0.1% THD)	100W/8 ohm per Band
	Power Supply	�53V

	Block Diagram

3_way_active_lsp_block.gif (16806 bytes)

�� Fig.4, �� . �� . �� 1, � �� BR1, � �� S1, �� JF1, � �� F1, �� RCA �� JF2 �� led D27. � �� T1 �� =2�38V �� B=2X15V. � �� BR1 �� , �� . �� IC5-6-7. �� JF2 �� . �� crossover �� T1.

Part List [Fig.2]

T1=110-230Vac\|\|A=2X38V >350VA	JF2=Female RCA Jack	MID=MIDRANGE 8 ohms
B=2X15V 30VA	F1=FUSE 1.2A SLOW+CASE	WOO=WOOFER 8ohms
BR1=BRIDGE RECTIFIER 400V 35A	S1=2XON-OFF 15A Switch
JF1=3pin male supply jack	TW=TWEETER 8R

Filter_butterworth_12dB.gif (5974 bytes)

Fig.5--Crossover calculation

3-Way Active Loudspeaker - Main PCB [88kb]

3-Way electronic crossover -12dB/oct - PCB [24kb]

3-Way Active Loudspeaker in English

Sam Electronic Circuits 9/02

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