SS Amp Upgrade Thoughts (from Simaudio) with Magicos

I have owned the Benchmark AHB2 and Coda # 8. I took the AHB2 to a dealer and hooked it up to the Magico A3. Terrible, not enough power.

The CODA #8 will work well as would the cheaper Schiit Wotan. However, let me suggest an amp that I like better than the #8 and the Wotan. It is a 20-year-old CODA #11. I see an expensive one on eBay. I paid $2457 with shipping last month for mine.

With my new Imsersiv D-1 DAC, which is a firehose of sound, the #11 was preferred a tiny bit more than the CODA #16 amp on my Livingroom Yamaha NS5000 speakers.

I moved my #16 amp to the office where I have a used $1000 Magnepan Mini speaker. I cannot believe how good the #16 is on the Maggies. Again, I use the Imersiv D-1 DAC on the office. A crazy price differential with the DAC and amp compared to the speaker but there is a ton of magic happening.

The #11 and #16 are my end game amps and both would be great with the Magico A3. 

I agree with the Coda #8 solution. I had this amp and it is very good for low volume listening.

I don’t have experience with the 390, but I have made significant gains in my low volume performance by improving the digital chain. Something to consider for the future.

I suspect your existing amp is enough, but you need to KNOW if that is true.

the question is: these speakers, this location, at my listening level, for content with dynamics, Will I benefit from more power?

btw, maximum component depth is _____?

I suggest you find something twice as powerful as existing that you can return, buy/listen/answer the question.

once you know the answer, keep/return what you used to get the answer

btw, I chose Furman Power Conditioner P-1800 PF R because it's capacitors store/deliver 45 amp peaks for the 'power in' side of those dynamic needs.

https://furmanpower.com/products/p-1800-pfr

I paid far less when an open box popped up for sale years ago

Before changing any equipment I suggest you try using some EQ adjustments.  You want more fullness and slam, but you listen at low volume.  The Fletcher/Munson curves show how this could be heard as a lack of fullness.  Older equipment used to have a "loudness control" to counteract this.  EQ can simulate a loudness control and it may solve your problems without changing equipment.

Take a look at Odyssey amplifiers.  I replaced a highly-regarded tube stereo amp with Odyssey mono-bloc amps, and the impact was astounding—superb imaging, sound stage, and instrument and voice tonal qualities.  I have the Kismet amps in the less expensive cases.  Odyssey also makes stereo amps.