Keeley Compressor Plus
With the offering of the Compressor Plus, Keeley has given their fans a newer, more versatile take on their classic four-knob compressor. With more settings to tweak and a more user friendly interface, this pedal gives its intended audience (guitar players) a magnificent a terrific solution for compression. Although this pedal is perfect for guitar players, it may have limited applicability in the world of horn players. If you are the type of player that wants to use compression to simply add some personality, a little grit, or some more mid range to your sound, than this pedal will do wonders for you. However, if you view compression as a tool to manage your signal, and to corral and contain all of the craziness that your pedals are creating, then this pedal may not be the right choice. Unlike its brother, The GC-2, the Compressor Plus has its own sound. It does not reproduce a super clean and crisp version of your tone, rather it inflects your sound with its own personality. If this is what you are looking for out of a compressor pedal, this is exactly the pedal for you.
External Control: None
Price Range: $$
This pedal is truly an upgrade from its predecessor, the C4. It's reconfigured knobs are truly simple to understand even at first glance. The attack/release switch is a remarkably convenient way to tweak your settings even further. We especially like the white blend knob. This knob controls, in our mind, the most important parameter on the pedal, and that fact that it stands out from the other three knobs is a wonderful touch.
This is a very quiet compressor. If you like some of that bacon sizzle sound, you can find it, but for the most part, this pedal will not create a noticeable hiss.
Live application: 2.5/5
This category is one that truly depends on the user. For those who are looking for a compressor that will not drastically alter your tone, and will simply manage your signal, this is not your pedal. Many horn players need ways to tame all of the added frequencies and signal level their pedals create, and a compressor like the Keeley GC-2 does that perfectly without sucking out your tone. This is in part due to the ratio of compression (the lower the better for this purpose). Even at its lowest compression setting, the Compressor Plus gives you that squished mid-range-heavy sound that certain levels of compression create. For those that want to use compression as an effect itself, this pedal is one to check out. The Compressor Plus gives your sound more edge, more focus on the mids, and more “electrified” sound. There are many scenarios where this could be quite useful and translate well on stage. If this is what you hope to get out of a compressor, then this is precisely the pedal to add to your chain.
In the following clips, you will be able to hear the Compressor Plus at various level of compression as compared to an uncompressed sound. This serves to highlight the tonal and textural changes the Compressor Plus can make to your sound. In each clip, the Level knob is at 12 o'clock, the Tone knob is at 12 p'clock, the Blend knob is all the way to the right, and the toggle switch is set to Single Coil. The Sustain knob (compression control) is the parameter that changes from clip to clip.
https://robertkeeley.com/Keeley+Compressor+PlusProduct info taken from the Keeley website