Adding Subwoofer output to Aikido preamp circuit

dr._sleep · 22nd June 2006, 04:09 PM

I would like to add a summed L/R subwoofer out to my Aikido preamp circuit. I already have an active crossover (60 Hz) and sub dedicated amplifier, so I'm looking for a summed line out circuit.

Any ideas on the implementation of such.

Thanks, dr_sleep

Giaime · 22nd June 2006, 04:40 PM

Maybe it's too simple, but you should be able to do the mixing with 2 resistors, one from L output, one from R output and connected togheter.

dr._sleep · 22nd June 2006, 04:45 PM

I've summed the active crossover L/R outs via 2-100 ohm resistors to a mono SS amp, I could do the same for a mono pre out in the preamplifier.

dr._sleep

agent.5 · 22nd June 2006, 07:08 PM

tubecad has one or two blogs about using two coupling capacitors in an aikido for two outputs. Using different capacitor values, you can not only get 2 outputs, but different frequency for high pass filters.

dr._sleep · 23rd June 2006, 12:10 AM

Thanks for the input.

I decided to use the stereo 400 ohm transformerless outputs of the Aikido (33uF Solen coupling cap) to my active crossover which then sums to mono before going to my mono sub amp (Crown DC 150 strapped) and a Decware 10 inch Deathbox (http://www.decware.com/newsite/mainmenu.htm),
sounds nice and low with mucho puncho.

dr_sleep

reenberg · 13th November 2007, 04:18 PM

Nice work Dr.

Any change you could make a drawing of your schematic ?
I'm planing to make a headphone/preamp comby my self and would love some inspiration

22nd June 2006, 04:09 PM	#1
dr._sleep diyAudio Member Join Date: Jul 2005 Location: southern us	Adding Subwoofer output to Aikido preamp circuit I would like to add a summed L/R subwoofer out to my Aikido preamp circuit. I already have an active crossover (60 Hz) and sub dedicated amplifier, so I'm looking for a summed line out circuit. Any ideas on the implementation of such. Thanks, dr_sleep

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22nd June 2006, 04:40 PM	#2
Giaime diyAudio Member Join Date: Oct 2004	Maybe it's too simple, but you should be able to do the mixing with 2 resistors, one from L output, one from R output and connected togheter.

22nd June 2006, 04:45 PM	#3
dr._sleep diyAudio Member Join Date: Jul 2005 Location: southern us	I've summed the active crossover L/R outs via 2-100 ohm resistors to a mono SS amp, I could do the same for a mono pre out in the preamplifier. dr._sleep

22nd June 2006, 07:08 PM	#4
agent.5 diyAudio Member Join Date: Aug 2003 Location: San Francisco, CA	tubecad has one or two blogs about using two coupling capacitors in an aikido for two outputs. Using different capacitor values, you can not only get 2 outputs, but different frequency for high pass filters.

23rd June 2006, 12:10 AM	#5
dr._sleep diyAudio Member Join Date: Jul 2005 Location: southern us	Thanks for the input. I decided to use the stereo 400 ohm transformerless outputs of the Aikido (33uF Solen coupling cap) to my active crossover which then sums to mono before going to my mono sub amp (Crown DC 150 strapped) and a Decware 10 inch Deathbox (http://www.decware.com/newsite/mainmenu.htm), sounds nice and low with mucho puncho. dr_sleep

13th November 2007, 04:18 PM	#6
reenberg diyAudio Member Join Date: Jun 2005 Location: Dk	Nice work Dr. Any change you could make a drawing of your schematic ? I'm planing to make a headphone/preamp comby my self and would love some inspiration

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