Welcome to Ask the Expert. Today, I have a couple of questions that are kind of related, so I'm going to cover both of them. Rudolf is asking: "Can I connect a CD-transport directly to the Focus–series, or do I need an external DAC"? At the same time, we have Zhicheng – Sorry if I don't pronounce that correctly. "Hey there. I'm thinking to purchase a DAC for my Xeo 4. Is it necessary for a better sound?" That's more or less the same question. When you have a digital speaker like the Focus, or the previous series we have created, would it be better to buy an external DAC to improve the sound? The DAC is a D/A converter converting a digital signal to an analogue signal. And very often a better DAC will result in better sound. Should I do that on on my digital, active speaker? And in both cases the answer is actually ‘No’. That should not really be needed or even a good idea because these speakers have digital crossovers. Whenever the signal comes into the loudspeaker, it has to be converted to a digital signal for the crossover to work. There is no way to pass the signal through the loudspeaker in a purely analogue way, because that's the design of the crossover. And there's lots of benefits in that that we covered in a different video. But the shorter signal path will always be to go with a digital signal into the loudspeaker, because then you can take that digital signal directly and start working on the crossover. Whereas the analogue signal will be converted back to digital inside the speaker. So if you have a digital signal like in your CD player, go through the DAC, convert to analogue into the speaker, it goes back to digital. Why do that extra step? In the end, just use the digital signal directly into the speaker. That will give the best performance.