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The Keeley Compressor is the most popular boutique compressor in the world. With well over 50,000 compressors built in our shop we have an expert understanding of compression, limiting, and sustain. We know what it takes to make an instrument sound like it’s been professionally recorded. We know how to make your guitar jump from the mix. We know how to make it fun and easy to play. Keeley Compression is how. The Keeley Compressor Plus is the first true advancement in our 2 and 4 knob compressor line. The new features are simple and straight forward. Now there is a simple Release Switch that is tuned for single coils or humbuckers. No more wondering if you have the attack or release set right. Your humbuckers will have all the attack and punch that they should. Our team designed a gorgeous sounding Tone Control that emphasizes the most sensitive harmonics that can be lost in compression. The Compressor Plus now sports a Blend Control that retains the peaks in your playing and more importantly the proper phasing of your guitar signal. The Keeley Compressor Plus offers the same gorgeous push of frequencies and sweetening of tone that the old comps gave you, now with the flexibility to handle any instrument.The Keeley Compressor Plus is a compressor with an expander/sustainer. Not only does it act as a regular compressor, limiting the peaks in your playing, it adds more and more gain as notes fade out. Now you have sustain. Nothing worse that a note or a bend that has died before it’s time; the Keeley Compressor Plus adds just the right amount of sustain and expressive bloom to your notes.The new Release Switch on the Keeley Compressor Plus is designed to make it very easy to transition between single coil and humbucker guitars. Humbuckers have more average energy than single coils and this can cause compressors to stay in “compression mode” for a lot longer. This can make any series of notes you play sound dull. With the quick release of the new Compressor Plus, your humbuckers stay true sounding and each note retains attack and definition.The Tone Control is our own design taken from analog delays and other vintage effects. Those effects used an emphasis circuit to recover treble and highs after they went through the BBD or other analog delay lines. We took that circuit and made it into a full fledged tone control! We found that it was the perfect way to gently add back in highs lost in the compression process.