Midbass amp options

Hello.

I have a 4-way active stereo system, currently with Hypex UcD400HG driving midbasses (18" OB, 8ohm). I'm thinking of upgrading the midbass amps and use the UcD modules to power two additional subs. Top options so far for midbass: IcePower 1200AS1, Hypex NC400, Hypex FA251 or FA501, or might as well wait some months and get a used LSA Voyager/Peachtree GaN amp. The DIY modules allow for building into the DIY speaker and get them out of sight, though.

The search is in the context of nice tube/SET amps for midrange and treble and very good digital to analogue conversion. The amp will be used in the 80 to 500Hz range.

Focusing on Hypex options, looking at the Fusion Amp manual I noticed the FA251 and FA501 have an ADC>DSP>DAC sections between the analogue in and NCore. I do digital xo/DSP further up the chain, so don't need this here. Old school preconceptions skew me towards thinking these sections likely aren't better than a plain analogue into a NC400. Yet the FA modules are so convenient with all-in-one construction and turn-on upon input sensing...would be so much easier🙂

So I wanted to check with those who have heard FA and NC amps if the ADC>DSP>DAC degrades sound in any shape, since I wouldn't really need those capabilities for my application?

Thank you!