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Comparison of Polk SDA CRS+ with Boston Acoustics A400 -- Bass= SDA; Mids/highs=A400. — Polk Audio Forum
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Amazon.com: Boston Acoustics 6.5" Speaker Foam Surround Edge Repair Kit - 2 Speaker Kit - Compatible with Boston Acoustics A400, A-40, A-40 Series II, 360, 360 Series II, 362, CR7, HD-9, HD9, HD 9, Many More : Electronics
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Boston Acoustics A400 3-way Floor/ Tower Speakers - Local Pick up ONLY Photo #3174736 - UK Audio Mart
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