Donner ABY Box Line Selector AB Switch Mini Guitar Effect Pedal True Bypass

The media could not be loaded. I really had my doubts when I first ordered this pedal, mostly due to a previous bad experience with another brand. Upon delivery, packaging was great, as the pedal is surrounded by foam. The control layout is basic and straightforward. The 3-way toggle switch gives a slightly different sound with each setting. With the gain control, you can get everything from AC/DC to plenty enough gain for hard rock and metal. Overall, it’s a great sounding pedal, and you can’t beat the price. It seems to be well made, and it’s small and compact. The only downside is that there is no internal battery, you have to get a power supply. Would definitely recommend this pedal. You can see in the photo the pedal settings that were used for the video.

I’ve tried multiple noise gate pedals over the years, and the Donner Noise Killer has seriously impressed me. If you struggle with unwanted hum or interference—especially with high-gain setups—this pedal is a lifesaver.Two Modes for Ultimate FlexibilityThe Hard mode aggressively cuts noise, perfect for high-gain, distorted tones where you need a firm gate. The Soft mode is smoother and more natural, ideal for preserving sustain while subtly eliminating background noise. Switching between the two is seamless, and both modes deliver a crisp, noise-free output.True Bypass & Signal IntegrityUnlike cheaper alternatives that interfere with tone, this pedal maintains a clean and transparent signal path when disengaged. No tone suck, no muddiness—just your pure sound when the pedal is off.Compact & Built to LastThe metal chassis feels rugged and sturdy, yet it’s compact enough to fit comfortably on any pedalboard. The simplicity of the controls is a huge plus—no unnecessary complexity, just efficient noise suppression.Perfect for All Guitarists & GenresWhether you play metal, rock, or even ambient cleans, this pedal adapts beautifully. I’ve tested it with single coils, humbuckers, and various amps—always delivering stellar results.If you’re looking for an affordable yet high-performing noise gate, this Donner pedal is a must-have.

This sturdy little pedal came in a nice magnetically closable box with a quick but useful owner's guide and a couple cute Donner stickers (I believe all Rock 'n Roll goodies should come with a cool sticker! ;-).I play mostly hard rock and metal (a lot of that drop tuned D, Db, C and B). I was tired of getting almost instant feedback (in my setting - a small 12x14 room with a 40watt all tube Marshall DSL40). I don't like using the amp in Triode mode (reducing and cutting the output power in half). Needless to say, there was a lot of unwanted noise (and feedback) coming out constantly and almost instantly.Most of my 'effects' pedal plug straight into the front of the amp (first - last: Tremonti Dying Machine Way, Joyo Compressor, Tube Screamer Mini, and a Fulltone OCD distortion). I've patched this Donner Noise Killer along with my EarthQuacker Dispatch Master Delay/Reverb and volume attenuator pedals through the back FX Loop of the amp to get the most noise reduction without affecting the tone or the effects of the other pedals (besides which, this is a True Bypass pedal).As mentioned above, I use a JHS Little Black Amp Box 'Passive amp Attenuator' to cut back the overall volume output of the Marshall amp so I can turn up the Volumes to get into the sweet-spot of the amp itself without blowing my head or the roof off! Combined with the Donner Noise Killer pedal, these work perfectly to manage volumes and unwanted noises!The pedal has both a potentiometer Dial (ranges between -60 and +10db) and a Loud / Soft switch. I find it's happy place is switched into Soft mode (which Donner recommends for most playing styles in the leaflet/manual) and the Dial set just a tad below -40db. I had to play with this a bit to find the sweet spot where I still get sweet sustain and I'm able to kill the unwanted noises. As Donner designed, it's easy to adjust and I was jamming within a couple of minutes.There's just a little "pop" when stomping the the ON/OFF button that is audible through the amp. It's not terrible however. Besides, it on all the time now anyway. Not a concern...The difference in my setup/setting is like night and day concerning the ambient noise that's "killed" as well as the amount of feedback I cut out with this little guy! With it turned off, there's a definite buzzing noise coming out of the the amp. With it on, it's completely gone! With this on and set as described above, the amount of unwanted feedback is pretty much cut out while playing as well. Now there's plenty of time to palm-mute and turn down the guitar volume between songs.There maybe a better Noise Killer on the market. You might have a buy a few to find it. You'll probably be paying 3x the price as well and it'll be, more than likely, more cumbersome to dial it in.What's left to say? I'm satisfied with this well built Donner Noise Killer.Buy it! I bet it works for you they way it working for me.