ATC actually needs no introduction. The British company has been making studio speakers at a very high level for decades. Of course with the famous ATC midrange dome. A unit that has more than earned its spurs. First of all in studios worldwide, but now also in the living room. This time we have the passive ATC SCM40 in front of us; a heavy floorstander of just under 6000 euros per pair.
We previously had the SCM40A on a visit. During a livestream test. And there this active floorstander scored very high. Artist Tim Knol even found it the most pleasant of the three. No small compliment. However, with the ATC SCM40A the manufacturer can contro everything. And so, everything is matched. In a passive version this is not the case.
Like the SCM40A, the ATC SCM40 is a three-way speaker with a closed cabinet. The woofer measures a little over 16cm and has a crackling (yes, we can’t find another word) of a magnet. Then we see a 7.5cm midrange soft dome and a 2.5cm soft dome tweeter. Right… a dome midrange unit. That’s pretty unusual. We’ve had Infinity Kappa’s before that also had a midrange dome. And what a nice speaker that was.
The crossovers are at 380 and 3500 Hz. So the vocal range is largely kept free, which is positive. The range of the three units together is 48 Hz – 22 kHz (- 6dB point). The ATC SCM40 is solidly built. The weight of 31 Kg each shows that. The pair is just under one meter high, 37cm wide and 30cm deep. Quite compact. In white it is still a charming pair to look at!
Now we know that closed models usually demand a bit more from the amplifier. And we see that in the ATCs’ specifications as well. They recommend an amplifier with at least 75 watts at 8 Ohms. Consider an efficiency of 85dB and you will understand that there should be some current in the power amp. Our Bryston has absolutely no difficulty with driving them. Bt an average integrated amplifier will not always like it, we estimate. Keep that in mind. To wrap up. The entire cabinet sits on a nice base with spikes. We definitely recommend putting rings under the spikes, or perhaps separate feet. Think of Isoacoustics feet.