Epimetheus



Overview:

I set out to create critical listening speakers that will be enjoyable in any room you put them in. This was accomplished by creating a floor standing pair of speakers with great off axis response to make the largest “sweet spot” to fully enjoy your music. I believe speakers should be flexible enough to be an afterthought when you are relaxing to your favorite music.

Epimetheus utilizes a passive 2.5-way crossover design which means, compared to a 2-way crossover, there is an additional woofer that handles only the bass frequency.

Features:

+/- 2 dB from 70 to 17k Hz

Great Off Axis Response

Under $800

Floor standing

F3: 60 Hz

Drivers:

Tweeter: The Morel MDT29 was selected for it’s good off axis performance, and low frequency extension that allows it to be crossed over around 1800 Hz

Woofer: The Seas L16RN-SL was selected because its Q(tc) indicated it was suited for a sealed box, plus it has good low frequency extension for its size.

Documentation:

Testing Report

Crossover Schematic

Drafting

Testing Results:

Full Range

Purple: Full Range, Red: Tweeter, Blue: Mid-Woofer, Green: .5 Woofer

Full Range, Mid Woofer Inverted

Horizontal Off Axis Response

Purple: 0º, Red:15º, Green: 30º, Blue: 45º, Orange: 60º

Vertical Off Axis Response

Purple: 0º, Red:15º, Green: 30º, Blue: 45º, Orange: 60º

Harmonic Distortion:

Step Response: 

Impulse Response:

Minimum Phase Response:

Waterfall:

Tweeter Response:

Woofer Response:

Creative Commons License

Epimetheus by Russell Goddard is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

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