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Aussie Amplifiers High quality, high performance amplifier modules and accessories

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Old 17th April 2015, 03:21 AM   #11
The Saint is offline The Saint  Australia
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Join Date: Jul 2002
Location: Launceston, TAS, Australia
Quote:
Originally Posted by ben123 View Post
In the 'news' section on Anthony's website;

''I am currently developing a 20 watt Push Pull Pure Class A amplifier module. This will feature a DC Current Servo Bias Generator which actively monitors the DC bias in the main output stage and locks it into place regardless of supply rail voltage and heat sink temperature. The Bias can be actively adjusted from as low as 50ma to as high as 5 amps.''

Anthony how do you compare it against your 500L?
When I first saw your new extreme power designs, I thought they are expensive, I thought your new 20w class A would be to expensive, but your price is like super good!
Hi Ben

It is not an easy thing to compare the NXV500L to the new Class A module as the power output difference is very large. The Class A module is very much suited to the higher efficiency loudspeakers. If you have a pair of loudspeakers that are sub 88dB then the 20 watt Class A is really not for you. If your speakers are 90dB plus then the Class A module is a good match. The sound quality is very open, detailed and has excellent bass control just like the NXV500L, but at the same time has a much sharper imaging and a sweet sound signature that is unique to this module.

I hope this helps you Ben?

Cheers Anthony
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Old 18th April 2015, 01:22 PM   #12
ben123 is offline ben123  Belgium
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''20 Watts RMS sine wave into 8 Ohms Per Channel with 1.7 amps bias''

If I bias the amplifier at 0.85A, will I get 10W RMS into 8 ohm?,
does it go into class AB, at higher levels, or is this strict class A

Can you tell us about; ''Amplifier can be switched into low power dissipation or standby mode''
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Old 18th April 2015, 10:12 PM   #13
piyush7243 is offline piyush7243  India
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Join Date: May 2011
Can this be used with a 12v power supply as well if yes what would be the requirements?
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Old 19th April 2015, 04:53 AM   #14
The Saint is offline The Saint  Australia
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Join Date: Jul 2002
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Quote:
Originally Posted by piyush7243 View Post
Can this be used with a 12v power supply as well if yes what would be the requirements?
It would be possible to use it on +-12v supply not a single +12v supply

Cheers Anthony
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Old 19th April 2015, 05:09 AM   #15
The Saint is offline The Saint  Australia
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Join Date: Jul 2002
Location: Launceston, TAS, Australia
Quote:
Originally Posted by ben123 View Post
''20 Watts RMS sine wave into 8 Ohms Per Channel with 1.7 amps bias''

If I bias the amplifier at 0.85A, will I get 10W RMS into 8 ohm?,
does it go into class AB, at higher levels, or is this strict class A

Can you tell us about; ''Amplifier can be switched into low power dissipation or standby mode''
Hi Ben

For 10 watts a bias level of around 1 amp would be needed, beyond the 10 watts in Class A it will start working in Class AB.
As an example the 20 Watt Class A will double its power level into 4 ohms
but is well into Class AB at 40 watts. you can expect around 25% less power in Class A into a 4 ohm load with a 8 ohm load bias level as a rule of thumb.

The low dissipation mode switches another resistor into the bias network and presets the bias level down to around 300ma.

Cheers Anthony
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Old 19th April 2015, 08:17 AM   #16
piyush7243 is offline piyush7243  India
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Quote:
Originally Posted by The Saint View Post
It would be possible to use it on +-12v supply not a single +12v supply

Cheers Anthony
So can't be used in a car without a converter?
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Old 19th April 2015, 09:35 AM   #17
The Saint is offline The Saint  Australia
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Join Date: Jul 2002
Location: Launceston, TAS, Australia
Quote:
Originally Posted by piyush7243 View Post
So can't be used in a car without a converter?
Yes that is correct , you would need a DC to DC converter.

Cheers Anthony
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Old 20th April 2015, 07:28 PM   #18
ben123 is offline ben123  Belgium
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I have just seen that a new module is available; HPA-NXA50L
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Old 21st April 2015, 04:49 PM   #19
Leikis is offline Leikis
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Its the 20L with dual die Mosfets, more power ��
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Old 22nd April 2015, 12:49 AM   #20
The Saint is offline The Saint  Australia
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Join Date: Jul 2002
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Quote:
Originally Posted by ben123 View Post
I have just seen that a new module is available; HPA-NXA50L
Yes this is the same NXA20L module but with dual die laterals installed and some small changes to biasing for the higher power rating.

Cheers Anthony
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