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Your cart is empty.rolls Mic Preamp Audio Ducker (DU30B) . Product Dimensions 5 x 5 x 5 inches, Item Weight 1. 1 pounds.
J. Layton
August 15, 2025
I was hired to provide music for a community skateboard/basketball-shoot-out event. It was outdoors and required two sound systems, each with different music play lists. In addition, each sound system had wireless microphones for the announcers. Rather than man both sound systems in order to turn down the music whenever someone spoke into the mic, I bought two duckers. A ducker fades out the music when someone speaks into the microphone and turns it back up when they stop talking. DJs use duckers. I mainly run live music events so these little boxes were something I never needed until the organizer asked for the feature. I was going to try to use my compressors as duckers but these looked easier and were made for the job.I sent my laptop (music) into the tucker. You'll need an audio cable that terminates with RCA jacks, which connects to the ducker. Your mic will connect to the ducker via XLR cable. These two signals are combined in the ducker and fed out as a single RCA cable. THIS cable will go into your sound board.To use, you will set your sound board level so it is somewhere reasonable to start the adjustment process. No clipping! Next, you set the music level via laptop..so you can hear it through the PA system. Then set the the mic level on the ducker. Speak into the mic and adjust the signal level on the ducker. You have to balance the levels out between the vocal mic and the music input. The overall PA volume is controlled by the mixer. Once you have the music and vocal signals sounding the way you want it..adjust the ducking level and sensitivity. The duck level sets how LOW the ducker turns down the music-a little bit or way down. The sensitivity adjustment regulates how sensitive the ducker is. In other words you don't won't the ducker to turn down the music every time the mic picks up background noise, crowd noise, etc. You want the ducker to work ONLY when someone speaks directly into the mic. I had to turn the sensitivity down because the ducker was responding to the music I was playing. I decreased the sensitivity so it only ducked when someone spoke right into the microphone. This little box also lets you adjust how quickly the music level comes back up once the person stops speaking. Total control.It helped to have an assistant speak into the mic, with the music playing, while I made the adjustments back at the PA system. You could do it yourself by trial and error. Speak into mic, make adjustment, try again, tweak, and so on.Overall this is an easy to use device that made my life easier and the customer very happy.
Mark Space
August 1, 2025
Does what it says, just take the time play with the adjustments to get the effect you want. Ignore the reviews that say it shuts the sound off completely or it doesn’t have ramp up when the ducking is done, unless you want that.
RH
July 21, 2025
This is more of a "automatically interrupt the music when someone talks on the mic" type device. It's not for subtly lowering the volume on the background music while there is talking and then ramping it back up when the mic talking stops. This has a hard, fast ramp up and down (e.g. fast release and attack), and the knob for release time "fast/slow" only affects the delay before the ducking is disabled. It does not affect the fade back in of the audio as I had hoped.So this won't sound like your sound guy or DJ is dropping the volume of the music when the mic is active; it's a much harsher effect which doesn't work for my use.
simpletechdirect
July 8, 2025
Well, it does just what its intended to do. You can also, link them together and make a "make shift" priority switcher. Its solid and works fine. Only issue I had with one was the release time wasnt long enough. Its an easy mod though. I put a video on youtube you can watch if you need to do that. I was trying to use it to trigger the output of a mixing console over the house music with live bands. The house music would come blaring though every time the band stopped playing between songs. Its just one small capacitor to change. Great stuff other than that.
SCOTT C
June 18, 2025
In the beginning, I had a tv with audio out to my stereo. I had various inputs to the TV: Blu Ray player, Chromecast, Fire TV stick, and cable box. They all sounded great. Then I upgraded to an Alexa ecosystem, and needed a way to interact with Alexa, play Amazon Music, etc. through my stereo, without having to switch inputs. I tried the Echo Link - and found that it didn't really do this (TV is not a supported input). After lots of research, I found this device, and I have to say, it's the missing link.Many people have turned to Sonos speakers to provide a similar function. They do, but they're expensive and they don't leverage your existing stereo. With this device, I can connect the TV output to the line input (the "ducked" device), an Alexa device to the AUX input (the "ducking" device), and now my TV plays normally, but when I summon Alexa the TV is turned down and Alexa takes over. This has the added benefit that because the TV is turned down, it's a lot easier for Alexa to hear me speak (and understand me).If you combine this device with an Echo Dot, you have a perfect setup that far exceeds the Echo Link, and is also less expensive. You're using the Dot's microphone for voice input and the AUX input as the Dot's output, and you can use it to play music and interact through your stereo with it with the TV off. If you turn the TV on, then you get the TV audio like normal. If you have a Fire TV cube, you can effectively just bypass its cheap speaker by using a different wakeword for it, and just voice-control it through the Dot.I'm also happy that it's made in the USA. To the Rolls people who make this: you should market this to the Alexa world; it does something valuable that nobody else does. It's kind of the hardware equivalent of a killer app.
Mindy D.
April 27, 2025
Easy setup and worked like I wanted it to.
Adventure Park Lubbock
February 21, 2025
Needed to duck out music when making infrequent announcements at a commercial enttertainment facility. Pro audio guy suggested this. Hooked rca music to one side and wireless mic cable to another. Adjusted cutout threshold level and length of time music cutout. Works awesome.
Lyndon Connor
February 6, 2025
I've been looking for one of these like foreverIt works great had one for 12 years prior it still works it just got rusty and the volume nob for the mike stopped working.Its clean, neat, and dose the job this one was surprisenly expensive tho but if I get another 12 years out of this it was worth it!!
tim hunter
January 10, 2025
Thus product came with an American plug so I had to buy an adapter…… dissapointing …. The ducker itself works well needs a bit of fine tuning …
Ronny LECLERC
December 14, 2024
J'adore
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