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Amp kits from TaoBao

Posted 12th August 2011 at 07:50 AM by panson_hk

I can resist the low price from TaoBao. An LME49810 300W amp kit (w/o heatsink) is just RMB 200.00, ~$32.00. Similar "identical" kit is available from ebay for similar to higher price. So, it is time to buy some and evaluate. I just ordered such an amp kit and one 3886 x 3 amp kit.
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Headphone amp from TaoBao

Posted 12th August 2011 at 07:11 AM by panson_hk
Updated 12th August 2011 at 07:16 AM by panson_hk

I recently purchased a headamp from TaoBao. It is very inexpensive, less than US 30.00. The built quality is good though the outlook is so common. You can find my other sellers selling "identical" item under different brands e.g. 发烧级HIFI LS-100耳机放大器,耳放,耳机监听放大器@ PK千元耳放-淘宝网. My one is cheaper!

I will share my test results in the forum.
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CLASS D AMPLIFIER LINE OUPUT OPTIONS

Posted 11th August 2011 at 08:29 PM by radams23j6

I have a class d amplifier where all three ouputs are used ie both stereo chnls & sub-woofer channel. I want to add a line out connection to drive my external active speakers which are not very sensitive. Can i safely take a line out connection from each speaker crossover board, any advice would be "very much appreciated".

From. Radams23j6.
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VSPS Kit

Posted 3rd August 2011 at 01:21 AM by rjm

My notes tell me the first VSPS Kit was shipped on July 24th 2009. Two years later, there are just over 15 of the 100 kits left unsold. This was a limited edition, once gone they are gone and at the current rate that will happen before the end of the year.

So if you had it in mind to get one...

ordering page
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Philips CDM9 industrial production version bald turntable

Posted 31st July 2011 at 05:28 AM by junya

Click the image to open in full size.Three years ago, repaired a ALTIS the turntable, the sound sense in it, and therefore would like engraved it, after three years of efforts to: copy board, spare parts, commissioning. Trial finally came out.
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Swordfishy amp parts

Posted 18th July 2011 at 06:35 PM by klewis
Updated 30th November 2011 at 09:04 PM by klewis

latest schematic, parts list and pictures of boards: http://www.diyaudio.com/forums/aksa/...ml#post2702203 R4 1/2 W min

Build notes: http://www.diyaudio.com/forums/aksa/...ml#post2696859

18ga wire = 1.04 mm

bjt singleton input http://www.diyaudio.com/forums/solid...ml#post2723089

mikelm amp http://www.diyaudio.com/forums/solid...ml#post2724896

mikelm amp with buffer http://www.diyaudio.com/forums/solid...ml#post2746726

For 2sk1058/2SJ162 Amps lab 6 pieces total $45
Pacific Semi $8.48 2sk1058 $4.31 2SJ162

http://ampslab.com/trans_2sj162.htm

2SK170 GR Pacific Semi $1.10

http://www.pacificsemi.com/search.php?partno=2SK170GR...
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UHER 4000L

Posted 15th July 2011 at 02:01 AM by Aunson

I have a Uher 4000L had perfect clear audio sound a few months ago. The sounds has now slowly deteriorated to a scratchy and harsh tone you can barely hear the content. Any thoughts? TY
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Ok, a real post.

Posted 14th July 2011 at 09:23 PM by DrDyna

Just finished up my last iteration of my current main speaker, so I figured I'd post a couple of pictures.
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Energy Connoisseur C-3 Crossover Modified

Posted 10th July 2011 at 02:48 PM by tuantran
Updated 13th June 2012 at 03:48 AM by tuantran

I have modified another pair of Energy Connoisseur C-3 crossovers with V-Cap OIMP 250V capacitors(1uF, and 4uF), ClarityCap ESA 250V capacitor(15uF),Mills 12W resistors(5.6 Ohm, and 2.7 Ohm).The two inductors( 1.2mH laminated , and 0.5mH air core)are left untouched. Although V-Cap OIMP capacitors are not polarized, the outermost foil (short lead) must be connected towards the negative input of speaker. It is best to keep lead orientation consistent for 1uF and 4uF capacitors. It takes 200 hours of music listening in order to hear the clear sounds from the speakers with V-Cap OIMP in the crossovers. The speakers sound so smooth, clear with V-Cap OIMP capacitors. V-Cap OIMP capacitor may be one of the best capacitors for speaker crossover.
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Regarding the I2S lines

Posted 8th July 2011 at 02:19 PM by arumugam

Hi,

I have an Issue in my system to interface the I2S lines interface with Digital amplifier.I have the seperate signal processing board and I'm taking the I2S,BCLK,LRCLK outputs through Buffer(74LVC244) and in AMP board the signal is mapped to I2S to PWM converter.I placed a series termination resistor as 47E in all the signal lines in AMP board.In this condition,I could not listen the audio in the speaker and when I change the BCLK resistor as 1K keeping the other resistors as 47R then I could listen the audio output.Here I'm using the single core shielded cable with the length of 30cm to interface the amp and signal processing board..

Could anyone advice me reason behind this cause?

Thanks in Advance-Arumugam.
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