You have to buy an AVR with pre-outs.
An AVR with pre-outs would cost more than buying a <$300 AVR and a meant for theater set of speakers.
Unless you buy used. Easiest to find used would be...
Integra DTR 5.8 and 5.9(any newer they get over $500)
Onkyo 707/706/705(any newer they get over $500)Go to the full post