Jenson A300 HLX

mike49504 · 1st July 2011, 08:04 PM

This amp is using a 2N4401 for the bias transistor..

Is there a good sub to for this part?

mike49504 · 1st July 2011, 08:29 PM

Ok I guess the other transistors are also defective in the left channel

Are there good subs for the 2N4401 and the 2N4403??

Perry Babin · 1st July 2011, 10:06 PM

For a bias transistor, changing the transistor to a different part number could result in a bias that's no longer stable over a wide range of temperatures. The MPSA06 may work but you'd need to run the amp up to thermal to confirm that the bias is not drifting. If it drifts upward at high temperatures, it could cause the outputs to fail when the amp gets hot.

1st July 2011, 08:04 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Jenson A300 HLX This amp is using a 2N4401 for the bias transistor.. Is there a good sub to for this part?

1st July 2011, 10:06 PM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	For a bias transistor, changing the transistor to a different part number could result in a bias that's no longer stable over a wide range of temperatures. The MPSA06 may work but you'd need to run the amp up to thermal to confirm that the bias is not drifting. If it drifts upward at high temperatures, it could cause the outputs to fail when the amp gets hot. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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1st July 2011, 08:29 PM	#2
mike49504 diyAudio Member Join Date: Sep 2006	Ok I guess the other transistors are also defective in the left channel Are there good subs for the 2N4401 and the 2N4403??

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