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★★Free JLH Hifi Headphone Amp PCB, 0.008% THD★★
★★Free JLH Hifi Headphone Amp PCB, 0.008% THD★★
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Old 16th December 2011, 09:37 AM   #1
siliconray is offline siliconray  China
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Default ★★Free JLH Hifi Headphone Amp PCB, 0.008% THD★★

Keep on offering free audio PCBs..

Free JLH Headphone Amplifier Boards

This board is following JLH2005 design. Transistors used are: BC550, BC560 and MJE3055. Works excellent for 32, 120, 300 and 600 Ohm headphones. The THD is only 0.008%. Feel free to get 2 now, happy listenning!

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Old 16th December 2011, 09:51 AM   #2
gervenja is offline gervenja  Netherlands
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Hello Siliconray,

I would love to receive a pair of boards.
Please let me know what to do.

best regards John
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Old 16th December 2011, 09:56 AM   #3
siliconray is offline siliconray  China
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Hello Hohn

just click the link at the beginning of the post to "order" it. price is $0.01/pc because the system do not allow 0. What you need to pay is only shipping cost from China to your country.
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Old 16th December 2011, 11:36 AM   #4
andee1310 is offline andee1310
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If I want to connect it to headphone can I connected to one pcb or two pcb of this JLH Hifi Headphone Amp....?
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Old 16th December 2011, 02:08 PM   #5
siliconray is offline siliconray  China
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Hi Andee1310:

You can see from the photo there're 2 transistor one one board, that means one channel per board. You need 2 pcb to make a stereo. A 6.3mm headphone connector is comes with every 2 kit.
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Old 28th December 2011, 08:08 AM   #6
siliconray is offline siliconray  China
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Hello we developed a nice power supply for this headphone amplifier kit. Please see the details here:
Power supply for JLH headphone amplifier

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Old 6th January 2012, 01:21 AM   #7
dillmeister is offline dillmeister  Canada
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Thanks Siliconray, I got my boards in record time and they look great. Not sure how fast I will populate them and see how they work but I am impressed with your quick response and packaging. ( :
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Old 6th January 2012, 08:45 AM   #8
siliconray is offline siliconray  China
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Great...looking forward to see your finished boards and testing result. Don't forget to adjust the static output voltage to 0 before connect headphone
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Old 6th January 2012, 11:37 AM   #9
gervenja is offline gervenja  Netherlands
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Received my boards from the post office today, they have been there for over a week.
Very nice boards, very fast shipping.
Thanks John
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Old 22nd January 2012, 06:20 PM   #10
RS232 is offline RS232  United Kingdom
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Thanks for the fast shipping
I have 2 questions
The first is the value of R10 ?
The second one is: do the BC550/560 need to be matched ?

Many thanks
Ric
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