Class AB Audio Amplifiers

Cristi · 14th January 2010, 04:51 AM

Discussions about class AB audio amplifiers from Connexelectronic

julcat · 13th February 2010, 01:42 AM

Hello Cristi

I'm interested in the 300W LME49810 Audio Amplifier with Heatsink but i have some questions.

How many watts can it ouput in class A??
Does it comes assambled??

Cristi · 15th February 2010, 10:45 AM

the 300LME49810 module is complete assembled, and is class AB amplifier but can be adjusted to work as a class A amplifier with derrated output power to about 50-100W depending on cooling method. i recommend to use it in class AB, since the sound quality is quite high to not justify the class A operation with the inherent disadvantages.

butch_vlad · 25th February 2010, 01:17 AM

Hello
What is the supply voltage for the 500w amplifier?
can it run of 2x70 v cc?
thx

Cristi · 25th February 2010, 04:11 AM

to get the full power out of the 500W LME49810 amplifier, each module must be supplied with +-72 to +-76V DC for the power stage and +-75 to +-80V for the driver stage.

marchel · 27th February 2010, 09:09 AM

About the 500W LME49810,

Can it be configured to run 500W class A/B at 2 ohms? What's the supply voltage needed?

Thanks

Cristi · 27th February 2010, 09:16 AM

the supply voltage for 500W at 2 Ohms load impedance should be +-560 to +-60V for the power stage and +-60 to +-67V for the driver stage. if you want to use this SMPS Connexelectronic for the amplifier, can use a single differential voltage for both power stage and driver stage and the output voltage of the smps can be adjusted for +-60V.

butch_vlad · 27th February 2010, 11:01 AM

"Can provide differential output voltage within +-45 to +-55V range"
From the website.....what is the maximum voltage this smps can give? The increased output capacitors help sustaining the maximum wattage better?

Cristi · 6th March 2010, 06:22 AM

the A1000SMPS can provide as i mention before +-45 to +-55V without any change. for different output voltage, in range of +-35 to +-70 V one resistor from the feedback loop must be changed. the same transformer can be used for this voltage range.

TCx · 23rd May 2010, 08:45 AM

Hi,
I am looking for a hifi amp module. Output power is not much important, sound quality is of highest priority.
Which of these class AB modules would you recommend?
2x100W LM4702 BPL
2x100W LM4702 MOS
2x100W LM4702 SAP15
300W LME49810 Audio Amplifier
AEM6000 Audio Amplifier with heatsink

And if we add the class T or D amps to this comparison, which one(s) would be most recommended?
Thanks.

14th January 2010, 04:51 AM	#1
Cristi diyAudio Member Join Date: Dec 2008 Location: Shenzhen	Class AB Audio Amplifiers Discussions about class AB audio amplifiers from Connexelectronic

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13th February 2010, 01:42 AM	#2
julcat diyAudio Member Join Date: Sep 2009	Hello Cristi I'm interested in the 300W LME49810 Audio Amplifier with Heatsink but i have some questions. How many watts can it ouput in class A?? Does it comes assambled??

15th February 2010, 10:45 AM	#3
Cristi diyAudio Member Join Date: Dec 2008 Location: Shenzhen	the 300LME49810 module is complete assembled, and is class AB amplifier but can be adjusted to work as a class A amplifier with derrated output power to about 50-100W depending on cooling method. i recommend to use it in class AB, since the sound quality is quite high to not justify the class A operation with the inherent disadvantages.

25th February 2010, 01:17 AM	#4
butch_vlad diyAudio Member Join Date: Feb 2008	Hello What is the supply voltage for the 500w amplifier? can it run of 2x70 v cc? thx

25th February 2010, 04:11 AM	#5
Cristi diyAudio Member Join Date: Dec 2008 Location: Shenzhen	to get the full power out of the 500W LME49810 amplifier, each module must be supplied with +-72 to +-76V DC for the power stage and +-75 to +-80V for the driver stage.

27th February 2010, 09:09 AM	#6
marchel diyAudio Member Join Date: Nov 2007	About the 500W LME49810, Can it be configured to run 500W class A/B at 2 ohms? What's the supply voltage needed? Thanks

27th February 2010, 09:16 AM	#7
Cristi diyAudio Member Join Date: Dec 2008 Location: Shenzhen	the supply voltage for 500W at 2 Ohms load impedance should be +-560 to +-60V for the power stage and +-60 to +-67V for the driver stage. if you want to use this SMPS Connexelectronic for the amplifier, can use a single differential voltage for both power stage and driver stage and the output voltage of the smps can be adjusted for +-60V.

27th February 2010, 11:01 AM	#8
butch_vlad diyAudio Member Join Date: Feb 2008	"Can provide differential output voltage within +-45 to +-55V range" From the website.....what is the maximum voltage this smps can give? The increased output capacitors help sustaining the maximum wattage better?

6th March 2010, 06:22 AM	#9
Cristi diyAudio Member Join Date: Dec 2008 Location: Shenzhen	the A1000SMPS can provide as i mention before +-45 to +-55V without any change. for different output voltage, in range of +-35 to +-70 V one resistor from the feedback loop must be changed. the same transformer can be used for this voltage range.

23rd May 2010, 08:45 AM	#10
TCx diyAudio Member Join Date: Apr 2010	Hi, I am looking for a hifi amp module. Output power is not much important, sound quality is of highest priority. Which of these class AB modules would you recommend? 2x100W LM4702 BPL 2x100W LM4702 MOS 2x100W LM4702 SAP15 300W LME49810 Audio Amplifier AEM6000 Audio Amplifier with heatsink And if we add the class T or D amps to this comparison, which one(s) would be most recommended? Thanks.

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