No single best amplifier here. What decides it is what you have to drive, what you need to plug in, and how much of the system you want in one box.
| Area | Better | Why |
|---|
| Power | evenly matched | Effectively the same output - 80W against 70W into 8 ohms is under 1dB, which is not an audible difference in loudness. |
| Grip on hard loads | evenly matched | Both behave much the same into 4 ohms - output nearly doubles (160W and 140W). |
| Built-in DAC | A | Both decode on board, but only Denon AE PMA-A110 handles DSD. |
| Analogue inputs | A | Denon AE PMA-A110 takes more analogue sources - 4 against 2. |
| Room to grow | evenly matched | The same expansion options on both. |
| Amplifier class | depends | Denon AE PMA-A110 is Class A/B and Technics SU-G700M2 Grand Class is Class D. Class A/B runs warm and is the long-established mainstream choice; Class D runs cool and draws almost nothing at idle. Modern examples of both measure well - judge by the rest of the page. |
| Price | B | Technics SU-G700M2 Grand Class costs less - $2,700 against $3,999 at list. |
| Watts per dollar | B | Technics SU-G700M2 Grand Class is the cheaper watt - about $39 per watt against $50. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Denon AE PMA-A110 B Technics SU-G700M2 Grand Class
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both amplifiers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Denon AE PMA-A110 is ahead, but on only 1 of the measured areas, and it costs about 48% more. That is a lot of money for a narrow margin - Technics SU-G700M2 Grand Class is the sensible buy unless a specific feature above decides it for you. Think about the whole system: the roughly $1,299 saved by taking the cheaper one would buy better speakers or a subwoofer, which does more for the sound than the difference between two competent amplifiers.
What a spec sheet cannot show: how either sounds with your speakers, how the controls feel day to day, and what the app is like to live with - which is where most all-in-one amplifiers are actually won or lost. Power figures are the manufacturers' own and are not measured to a common standard, so treat small differences as noise. If you can hear both, that will tell you more than any row above.