My MSB Discrete DAC has a volume control and plenty of output. Almost 4v at 300 Ohms and close to 2v at 150 Ohms. I use predicted 150 Ohm 2v setting and without a preamp. I owned a Benchmark HP4 preamp and I found that the sound was better without it. So I sold it. The MSB has a high quality volume control and I only have a digital source.
