I think it's the same kit as the Jaycar KA-1814 and has the items you want.
It will do speaker level as well as line level and low pass filter is built in so you don't need a separate crossover.
Has High-Pass (20Hz) filter, Low-Pass (40Hz-200Hz variable), Gain control ±12dB, Equaliser ±12dB with 30Hz to 190Hz centre frequency. Needs a +/- 15V power supply.
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