If the speakers are basic entry level then they may be more of a bottleneck than an AV receiver with Pure Direct mode could be.
The speaker amplification may make the least difference of everything in your setup.
If you don't want your turntable audio going through an AV receiver then connect your turntable and or phono preamp to a good 2 channel integrated amp and then the intetraged amp, AV receiver and your speakers to an amplifier switch.