Turntable to Benchmark to amp...

Is it the Benchmark DAC1 or DAC1 Pre?

The regular DAC 1 does not have analog line level inputs to operate as a pre-amp for analog sources, I believe. The DAC1 Pre version does. I think the latter is what you would need.

I do not think the original DAC 1 has analog inputs.

Mapman and Jpainter are correct. The DAC-1 is simply a DAC with a volume control. You would have to get another preamp with phono inputs.

DAC-1 doesn't have analog input. You can trade your DAC1 for a Benchmark DAC1 Pre for a few hundred dollars extra and avoid the trouble of getting a separate preamp.