The Benchmark DAC has excellent output and excellent volume control especially the XLR outputs which are very powerful. So powerful you may have to install the internal jumper resistors to reduce the output to an acceptalble level for your power amp.The analog circuitry is all exceptionally low noise as the specs are industry leading.
So I would recommend taking the C48 out of the signal path not because it isn’t a good preamp but simply because every stage adds noise to the signal - shortest paths are best. And a good phono amp might be an upgrade in and of itself.
Alternatively a Mytek Brooklyn DAC has a built in phono and MQA decoding!
There is not so much to choose between in terms of the very high audio quality in many of the latest DACs so a choice based on features may be more cost effective.
So I would recommend taking the C48 out of the signal path not because it isn’t a good preamp but simply because every stage adds noise to the signal - shortest paths are best. And a good phono amp might be an upgrade in and of itself.
Alternatively a Mytek Brooklyn DAC has a built in phono and MQA decoding!
There is not so much to choose between in terms of the very high audio quality in many of the latest DACs so a choice based on features may be more cost effective.