Phase-perfect mini-monitor

Phase-perfect mini-monitor

Bill G.

Project Category:
Freestyle Speakers

Project Level:

Project Time:
8-20 Hours

Project Cost:
$100 – $500

Project Description:
Two great Tang Band drivers mounted in isolated cabinets that are phase aligned and floating in free space far away from walls and boundaries

Design Goals:
Point-source monitor with minimal interaction between drivers and between cabinets of both drivers – both cabinets are open

Driver Selection:

Enclosure Design:
Two open back solid block of wood enclosures

Enclosure Assembly:
Spaced out by sorbothane rubber isolators

Crossover Design:
Electronic, 12 db/octave triamplified

Tips & Tricks:
Using a big Forstner drill bit gut out all the wood for the big holes

Very happy with the outcome both looks and sound. Very airy and transparent, just as I had hoped

About the Designer:
I have been having fun making speakers for almost 40 years now. I paid my way through college partially by making speakers and have recently returned to it as a hobby, and making gifts for friend.

Project Parts List:

Tang Band 20-2240S 20mm Hi-Res Neodymium Tweeter
Tang Band W3-1797S 3″ Neodymium Midrange Driver

1 comment

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  1. 1

    Thank you for submitting your design which is very interesting. Re “airy and transparent” do these speakers image well? To be clear, could you say that they disappear and leave a 3 dimensional, palpable “image” in between them? If so, that would be exciting news. For comparison, I would propose that the Dick Sequerra Pyramid Metronome 7 speakers circa 1980 achieved this feat brilliantly, although that may have also had something to do with the crossover? Also, to “phase align” or to “time align” two drivers in a 2 way speaker, I assume the tweeter will always sit back (physically) from the woofer or midrange driver? If so, is there any simple, rule of thumb formula to phase or time align two drivers in this way, based on their diameters? The Spica TC50 also imaged well, and I now recall the tweeter was also set back from the woofer, due to its slanted face. Thank you and best wishes.

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