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Old 20th October 2005, 09:41 PM   #1
KnoB is offline KnoB  Finland
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Join Date: Oct 2005
Default Multiroom amplifier system

Hello!
I have almost ready audiosystem in my house. All cables and speakers are installed.
Only multiroom amplifier is missing.
So I need 4-channel amp with volumecontrol and mute/standby in each channel separately.
Every zone have own pair of speakers and a place for "keypad".
Every keypad need controls for volume up/down and mute or stby amp, one keypad added master on/off control for all 4 amps.

I think system like this:
- from H/K AVR430 multiroom outputs goes to mono sum (sounds better in large rooms when all speakers driven mono)
- after mono sum signal have to divide 4
- each signal goes thru "DS1669 Digital Pot IC" (http://www.aaroncake.net/circuits/volume.htm)
- signals to monoamps
- using amps with mute/standby option
- amp capable for 4ohm and about 15w (speakers 8ohm driven parallel)
- one transformer use all 4 amps, so I get all "off" with remote masterswitch

You have any ideas or comments?

Thanks,
KnoB
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Old 21st October 2005, 05:58 AM   #2
eehobby is offline eehobby  Canada
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Join Date: Aug 2003
Location: Calgary
Default Digital Pots Application Note

Sounds interesting.

Be sure to read this too:
http://www.maxim-ic.com/appnotes.cfm/appnote_number/161

Jake
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Old 21st October 2005, 03:10 PM   #3
mcp is offline mcp  United States
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Join Date: Jul 2002
Location: Vacation Land
Hello KnoB

Have a look at the TDA7386 (4-ch power amp IC). Ideal for BGM or Multi-Zoning.

Regards
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Michael Chua
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