Buy (Affiliate Links):
Monolith 10: https://www.anrdoezrs.net/links/77320...
Monolith 12: https://www.anrdoezrs.net/links/77320...
Monolith 15: https://www.anrdoezrs.net/links/77320...
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The Monoprice Monolith subwoofers provide quite a bit of output, have very nice linear response with extension down to 20Hz in the ported configurations. They have a variable phase adjustment which is a big deal IMHO (I know others have it as well). There is no chuffing (demoed in the video) from the port and the mechanical aspects are quiet (no resonances, no motor noise, no tinsel lead slap). The drive units themselves are quite nice but I do wonder if they would benefit from pole piece (cooling).


CEA-2010-A & CEA-2010-B test data can be found in the below spreadsheet:
https://docs.google.com/spreadsheets/...

Bottom Line:
The Monolith subwoofers are a very nice value. They don't have a lot of flash to them but what they lack in aesthetics (for some), they make up for in performance and features. The variable phase and XLR input are two features that delineate these subwoofers from "budget" subwoofers. The CEA-2010 testing yielded really solid results, though, to be fair, I don't have many to compare against at this moment in time. But by looking at others' results, I'd say these more than hold their own and present a very high value. There is no internal resonance, port noise is only an issue if you're playing test tones at the lowest of frequencies. Very solid subwoofers with great performance. I recommend them if you're looking at them as an option.



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All of my tests are conducted using KLIPPEL Hardware and Software. KLIPPEL is an innovative leader in providing unique test equipment for electro-acoustical transducers and audio systems. Founded in 1997 by Dr. Wolfgang Klippel, the novel techniques developed for control and measurement systems of loudspeakers and other transducers are the result of over 30 years of fundamental research. This provides more accurate physical models of loudspeakers, micro-speakers and headphones valid for both small and large amplitudes. The focus is on revealing the root causes of signal distortion and defects and giving practical indications for improvements in design and manufacturing of audio products. For information on KLIPPEL products, please visit their site below:
http://www.klippel.de/company/about-u...