Depends on the power you put in them...they are listed to go as low as 150hz, but not at rated power. I personally think 1000 is still too high, because your missing out on the lower midrange freq. That these speakers love.
I currently run mine at 630 with 100 watts, and they perform quite well.
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P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals
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