![]() ![]() I have no clue why it sounds so different. The Music that hits the amp is now peaking at around - 29 or -30 dBFS - it sounds better.īut this is only 6 dB more of digital gain at the 2V setting + the amp expecting 6 dB more gain at the same time. I switch the input sensitivity to 2V at the active speaker. The music that hits the amp is peaking at around - 35 dBFS - it sounds not good. I have the input sensitivity at the active speaker set to 1V. Turning the amp at the active speaker from input senstivity 1V to 2V results in a drop of output level of around 6dB -> at the amp of the speaker. No one listens tpo active speakers at full level all the time - they blow you ears off. so it does not matter here.įact is, for a comfortable listening (or working level) the signal has to be turned down be around 35 dB before it gets to the active speaker. I can choose to set the audio / music level digital before the converter, or analog after the converter.įor the difference in sound i am hearing by switching from 1V to 2V at the active Speaker, I can do both things, analog gain reduction after converter or digital gain reduction before the converter - the difference in sound is the same. The music is coming from an audio interface. The reality is, as far as I understand it, that the amp sees always less power than it should get on the paper. I do not really understand why one should be a better match than the other. I would be really intersted in what is going on here on the technical side.Ĭlick to expand.thank you for your answer. What is happening here? Is the phase differnt, is it a differnt level of distortion? The curve is the same with both settings. I measured the frequency response at the listening position. The intern, customers and even my wife can hear a clear difference. With the 2V setting everything comes to live, bass is less prominent audible, the whole thing sounds more cohesive.Īnd I really do not mean subtle changes. Similar Listings ATC SCM45A Pro 2018 (PAIR) ATC SCM0.1/15SL Pro 2021 Black ATC SCM20ASL Pro mk2 6.5 inch Powered Studio Monitors - PAIR - 2021 ATC SCM25A. All of the range, excluding the SCM25 and SCM45 are available as passive or active units, the. The SCM25/45/50/100/110 and 150 are a range of three way loudspeakers. Discrete MOSFET class A/B bi-amp pack with 150W/60W/25W continuous power output. SCM45 give impression of more bass, because they are slightly less clean and tight. SCM50 definitely extend lower, but are much tighter. that's somewhat contradictorily to what you said. With the 1V setting the bass sounds "mellow" and everthing else is somehow undefinied. ATC Loudspeakers SCM45A Features: Critical near-field listening applications in all control rooms. The ATC homepage states that the SCM45 has -6dB 42Hz and the SCM50 has -6dB 38 Hz. I did some research, but did not find a clear answer so I want to try it in this forum. The speakers are connected to an Interface (UA Apollo 16) with Output of 20dBU.Ĭhanging the setting at the ATC from 1V /2.2dB to 2V / 8.2dBu makes a not subtle change in sound. The input sensitivity of the speakers amp, can be adjusted from 1V to 2V. ![]()
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