The problem with a ‘power amp’ like the A-100, is that you don’t have a proper and flexible preamp in your system, I’m assuming your chain would be:
MacBook -> Modi 3 -> A-100 -> Speakers
While this would work, and produce good (loud) sound, the lack of preamp has significant limitations:
- No remote to control volume or select inputs (if you have other sources), this also means your system would only play at maximum gain (hence the ‘loud’ comment above).
- No analog inputs, for many this is not an issue, but if you have or want a turntable, tape, or other device with only analog outputs, you’re out of luck.
- No tone controls, some consider this a benefit, but for many they’re useful to compensate for room, recording, or loudness.
- Additional gain, while the Modi would have enough output to drive the A-100 to a significant level, it probably doesn’t have enough to drive it to full output. While this may be plenty loud, it’s better to be able to drive the amp properly.
There a probably other advantages, but these are the basics . While bitracer’s point regarding extra components is well taken, I’d recommend an integrated amp like the TA-100.
Edit: I don’t know if the TA-100 has tone controls.