Apos
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Avoid at all cost
Avoid at all cost. Sent two Topping LA90 amps. Both defective after just a few weeks. Its been six months now and still no replacement. APOS has no legit phone number that will contact a person. Auto generated email reply once a week. Basically two defective products. Out $1600. Look up address APOS is run out of an apartment. Not legit business.