In this photo Afrojack has the Waves L1 Ultramaximizer plugin opened on his screen

Waves L1 Ultramaximizer can be seen in this video at 2:50 as the third plugin used on the channel.

Another plug in Andrew mentions in his home mastering blog post. "For simpler material where loudness is more important than dynamics - sparse hip-hop beats, driving dance tracks - I'll use this instead of the Precision Maximizer. You can push stuff quite far without the audio breaking up."

Used for the vocals on "Save Room", as stated by mix engineer Tony Maserati in this March 2007 Sound on Sound interview. Image of the settings can be found here and here.

Vocals: McDSP Filter Bank E6, Waves Renaissance Compressor, Renaissance EQ, L1 Ultramaximiser

"The song has two lead vocal comps, on tracks 48 and 49. You can see that I'm using a lot of plug-ins on those: I'm doing a lot of drastic stuff. They were probably recorded on two different occasions with two different engineers who didn't take the time to match the performances by using the same microphone and signal chains. I get really pissed at this lack of effort on the part of recordists — there are standards in engineering. John Legend is a phenomenal vocalist and before he comes into your room to record, you should reach out to other engineers who have recorded with him to find out what they used — especially, of course, the guy who recorded the song that you're going to be overdubbing onto! That's what I did, the first time I recorded John.

"We liked the lead vocal, it had an energy that we did not want to give up, but it's not recorded consistently. You can even see on the screen that the levels are all over the place. So I spent a lot of time and energy pushing and pulling all over the place to compensate for frequency anomalies and to make the two takes sound the same, as well as to force all the energy out of the vocals that is in there. On track 48 I have a Filter Bank EQ that's pushing a ton of bottom and taking off some top. The Renaissance Compressor is trying to make sense of that, levelling things out a bit with a really slow attack.

"I don't normally use the L1 Ultramaximiser on a lead voice, but it was probably already there, and I'm using it to get some intelligibility and energy from the vocal. The Renaissance is boosting above 9k and the McDSP is cutting around there as well. I think it's because I'm compensating for the L1, which is doing something I'm not entirely happy with. A lot of what I'm doing is simply compensating for a poor recording.

"Lastly I throw on the R4 Renaissance EQ, probably because after mixing for a couple of days, I felt that it needed a little bit more top, and I did not want to change my settings on the outboard, which was probably my GML 8200. I'm also EQ-ing on the board. So I'm being heavy-handed, also with the effects on track 49, in trying to match these two tracks. I was really fighting until we got something out of it, and I think we accomplished that. The end result sounds pretty good."

In the "In The Studio With Future Music" video by MusicRadar Tech, Sébastien Léger demonstrates his use of the Waves L1 Ultramaximizer plugin.

When it comes to effects plug-ins, Moulder fancies Waves. “I use the L1 a lot for getting things to cut through and sit in mixes,” he says. “The Renaissance EQ I like for digital equalizing and their De-esser works well. I use the McDSP stuff a lot for filtering and their new multi-band compressors and analog channels are good, too.

In a YouTube video, at 1:34, audio engineer Manny Marroquin states that the Waves L1 Ultramaximizer is his favorite Waves plugin.

At the minute 17:07 we can see L1 from Waves.

"I think having a few workhorses is better than running down pages of plugins to choose from. It helps me create quick presets for more consistency across projects. These are the plugins I use, very basic: [...]"

The plugin can be spotted in the video at minute 17.10.

On their official website, SYNOZ mentions using the Waves L1 Ultramaximizer.