perkri, you started another uplifting debate with your simple question :-)
Your friend can also e.g try the blusound node2 streamer/dac which has a sub out before the pre amp. Or the Martin Logan/Paradigm P AMP which I recommend because then you also get the ARC room correction system. The P AMP is fine for driving smaller speakers at normal SPLs. Actually I use it for both Tannoy DC10A and ATC 19 for near-field listening (not exactly small).
To the P AMP you may then connect 28 subs for a really decent bass...
Your friend can also e.g try the blusound node2 streamer/dac which has a sub out before the pre amp. Or the Martin Logan/Paradigm P AMP which I recommend because then you also get the ARC room correction system. The P AMP is fine for driving smaller speakers at normal SPLs. Actually I use it for both Tannoy DC10A and ATC 19 for near-field listening (not exactly small).
To the P AMP you may then connect 28 subs for a really decent bass...