dgage Posted June 17, 2020 Report Share Posted June 17, 2020 I need a small source device to be able to test our powered subwoofers. A phone doesn't provide enough voltage to push our subwoofers to their limits. I have used a computer with a USB interface (Focusrite 2i2) and it can get fairly loud but I forgot my computer at home one day and couldn't test. So I'm hoping for something pretty small that I can play through or attached to a phone and has enough voltage to get the subwoofers really moving. Does anyone have some ideas on such a mini preamp with subwoofer out? Thanks. David Quote Link to comment Share on other sites More sharing options...
kipman725 Posted June 17, 2020 Report Share Posted June 17, 2020 Art clean box pro will convert the single ended signal from your phone to balanced signal with gain. I did some measurements /modifications on mine to improve LF response: https://www.diyaudio.com/forums/analog-line-level/329210-art-cleanbox-pro-low-freq-modification.html 1 Quote Link to comment Share on other sites More sharing options...
dgage Posted June 17, 2020 Author Report Share Posted June 17, 2020 Thanks Kipman725. I think this will work well for my needs. Since I’m just using it for testing purposes (no measurements), I won’t even need to worry about modifying it for roll off. Quote Link to comment Share on other sites More sharing options...
peniku8 Posted June 18, 2020 Report Share Posted June 18, 2020 What‘s the purpose of those caps? DC blocking? Wouldn‘t it possible to just short em instead then? Quote Link to comment Share on other sites More sharing options...
kipman725 Posted June 22, 2020 Report Share Posted June 22, 2020 On 6/18/2020 at 9:52 AM, peniku8 said: What‘s the purpose of those caps? DC blocking? Wouldn‘t it possible to just short em instead then? possibly they are not needed, its hard to tell because powering the unit up outside its case is tricky. Quote Link to comment Share on other sites More sharing options...
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