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The Boss DS-1 has a very heavy metal timbre to start with. Keeley's many modifications take the distortion pedal to a full metal jacket sound. Every component changed or added is of the highest-quality. Metal film resistors are used for a low nois...
The Boss DS-1 has a very heavy metal timbre to start with. Keeley's many modifications take the distortion pedal to a full metal jacket sound. Every component changed or added is of the highest-quality. Metal film resistors are used for a low noise floor; this is essential for a high-gain pedal.
The Keeley modded DS-1 distortion pedal has a lower noise level than the stock pedal. Metal film and poly capacitors are used in the coupling sections to provide the true midrange and high frequency transparency your guitar tone needs while increasing the bass response.
It goes without saying that the note definition has been improved. The final result is an awesome distortion pedal that provides more gain and volume while losing no note definition. Perfect for driving Marshall stacks and other high-powered gear. The DS-1 effect pedal has been modified to have asymmetrical clipping, which gives you second-order harmonic distortion. In addition to lending a very musical sound, the Boss distortion pedal produces an octave-type effect at very high saturation levels.
The Boss distortion pedal has been modified to have the Seeing Eye LED. There is an LED located in the "O" of the word Tone. This LED is not just a visual effect. It's part of the circuit that clips the signal and gives it that full, distorted sound. The heavier you play, the brighter the LED illuminates, providing more distortion. The Extra LED increases the volume output of the pedal a bit, great for using the Boss DS-1 as a preamp to push the amp or to fine tune a low distortion sound on the DS-1 pedal.
The Boss DS-1 distortion pedal's ultra mode has an even fatter, more robust tone. This is designed to give you the "Wall of Marshall Amplifiers" tone. This is perfect for beefing up a Strat or pushing an amp hard so that you get more natural tube amp distortion.
This Boss distortion pedal has a mode switch to dictate the different tones you use. With the switch positioned up, you have the Seeing Eye operation mode. With the DS-1 distortion pedal's switch down you have the Ultra mode.
More gain, more volume, and enhanced note definition.
Well, I have to admit I purchased the DS1 because I am a huge fan of John Frusciante's playing, and the DS1 is a huge part of his sound on RHCP in quite a few songs. I must say, I haven't been able to make it sound "great" as I thought I would have, It sounds either too bright or too muffled, and I really dislike the clipping on it. Although I have to admit it is a great distortion to just play raw punk rock stuff on.
Main differences I noticed with the Keeley mod are a huge volume boost, a nicer bass response and more organic and dynamic distortion which responds better to how you play. You'll get more grit if you play harder and it will smooth nicely if you play softer. The "Seeing Eye Mode" switch is always on for me.