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Chip Amps Amplifiers based on integrated circuits

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Old 6th April 2013, 09:31 AM   #1
andreyambalov is offline andreyambalov  United States
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Location: Colifornia

I am not a professional, have only very basic knowledge and still trying to build a 15 CHANNEL DISTRIBUTION STEREO AMPLIFIER + 15 CHANNEL POWER STEREO AMPLIFIER to distribute music signal from CD, Radio, TV or Computer to 15 different locations around my house.
On the Internet I found a schematic that was called “Stereo Distribution Amplifier Module E-234” (see the attachment). They use DUAL LOW-NOISE OPERATIONAL AMPLIFIERS NE5532 and the schematic splits 1 stereo input to 6 stereo outputs. I want to split 1 stereo input to 15 stereo outputs by adding another 9 stereo outputs (I do not need the MONO option).CAN ANYONE TELL IF THIS IS GOING TO WORK?
Talking about 15 CHANNEL POWER STEREO AMPLIFIER -- On Ebay there is a “6 X 100W Class D Audio Amplifier Combo Kit w 36V 350W Power Supply TDA7498” for around $80. This board has 3 independent stereo amplifiers in it. So, for 15-channel power stereo amplifier I would need 5 of these kits.
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File Type: pdf Module E-234 Stereo Distribution Amplifier.pdf (511.5 KB, 91 views)
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Old 6th April 2013, 10:09 AM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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Location: The Jurassic Coast, England. GB
The module your are looking at is specifically designed for balanced line commercial audio and stage work.
Not needed and far too complicated.
If you build an amplifier, with controls, per zone and mount them in each zone and then build a stereo to 15 channel stereo output mixer, use screened lead to each zone and you will not need the heavy speaker cables everywhere! If you ustilise the same E234 circuit and not use the B amplifiers, it will be unbalanced and just what you need.

Last edited by JonSnell Electronic; 6th April 2013 at 10:10 AM. Reason: Spelling ... again!
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