Author Archives: Dan

About Dan

For a complete biography, stop by www.danmarx.org and click around for a while.

Unexpected Goodwill Find – You Won’t Believe What I Turned it Into

A little over 2 years ago I was checking out my local Goodwill for any miscellaneous stereo/electronics/speakers (as one does on a Saturday morning) when I came across a pretty interesting find – 8 small carboard boxes with a familiar … Continue reading

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DIY Swans M3 Tower Speakers Get an Upgrade for 2024!

I’ve had a pair of Swans M3 speakers since around the year 2000 – that was 24 years ago as of this writing – they were one of the first pair of really nice speakers I had ever built at … Continue reading

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Cerwin Vega L-7 Bookshelf Speaker Crossover-Enclosure-Tweeter Upgrade!

Last month I was at my parents house when my dad says, “Hey do you want a pair of speakers?” I thought heck yeah, I’m not one to turn down a free pair of speakers. So he shows me a … Continue reading

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Converting this $6 Goodwill Vizio Subwoofer into a Bumping Beast!

Last weekend I stopped by my local Goodwill hoping to find some audio-related goodies I could play around with. Lately it’s been slim pickins in the used stereo department with mostly junky old Blu-ray players and bits of pieces of … Continue reading

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Building a Notch Filter for the Beyerdynamic DT 770 Pro Headphones with Measurements

In this article I’ll go over how I designed, built and tested a passive notch filter for the Beyerdynamic DT 770 Pro 250-ohm closed-back headphones and include measurements using REW of the different filters responses. I bought these headphones over … Continue reading

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Measurement & Review of the AIMIYA A07 Power Amplifier

A few months ago I purchased the AIMIYA A07 Power Amplifier from Amazon for a whopping $60 during Prime Day. I’ve had the unit hooked up to my simple studio setup and have been very impressed with it so far. … Continue reading

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