I've seen a couple reviews saying that WiiM amp was not powerful enough to drive these or similar speakers to the user's satisfaction. I will be using a subwoofer, so maybe with crossover being active and sending low frequencies to the subwoofer instead of the speakers this will not be an issue. However I would prefer to not have to use a subwoofer in order to sufficiently drive the speakers. Any thoughts?
Here are the specs for the Elac DB63:
Nominal impedance 6 Ω
Sensitivity @2.83 v/1m 87 dB
Crossover Frequency 2000 Hz
Recommended Amplifier Power 20 - 140 W
Peak Power Handling 120 W
Tweeter 1 - inch Aluminum dome
Midrange (aramid-fiber) -
Woofer (aramid-fiber) 6 1/2 “
For what it's worth, WiiM Amp Pro drives my Revel M16 speakers (6 Ohm nominal, 86dB [2.83V@1M] sensitivity) to very uncomfortably loud levels.
This is at approx. 2,3m listening distance in a 18m2 living room in a concrete apartment building, used with a subwoofer. The sound is great - WiiM Amp Pro doesn't introduce any coloration that I can identify - except of course if you add some intentionally with EQ.
Also note that if you replace an amplifier for another one with double the power you will only get 3dB more maximum output - which is a very minor increase in perceived loudness.
You need 10x the amplifier power to get 10dB more output (which would be perceived double as loud).
Note that the WiiM Amp Ultra will not be much more powerful than the Amp Pro in practice. Going from 60W@8Ohm to 100W@8Ohm only gives you a little more than 2dB of extra output.
For analog sources, how loud an amplifier 'plays' will also be impacted by its voltage gain. Amplifiers with more gain will play louder for the same volume level.
Unfortunately whether or not any amp will drive your speakers adequately loud for you is a question no one here can really answer, as it depends on several factors, and some of them subjective:
- What level do you consider 'loud enough'?
- What is the average vs peak level of the media you want to reproduce - i.e. what kind of headroom do you need?
- Amplifier max power rating
- Loudspeaker sensitivity rating
- Your listening distance
- Will you be using a subwoofer?
- How close are your speakers to walls?
- How reflective your room is?
As an example, let's use
the Benchmark Amplifier + Speaker Output Calculator to see what kind of level you could expect from WiiM Amp Pro driving a pair of Elac DB63 loudspeaker at 3m in a typical room:

So we see you should be able to get approx. 101 dB SPL peak at 3m distance with this combination.
If we now assume 14dB of headroom (I'm taking this value because most streaming services are normalized to -14 LUFS) you get approx. 87dB SPL average level at the listening position (but being able to handle peaks up to 101 dB SPL).
If we instead assume a closer 2m listening distance the numbers change and you now get 91dB SPL average (with 105dB SPL peak, assuming the same 14dB of headroom).
As you can see, there's a lot of assumptions involved here but hopefully it illustrates the principles and might help you decide what you need. Good luck in your search and have fun!
