Used BOSS DS-1 Keeley Ultra Mod Pedal
This is a Used BOSS DS-1 Keeley Ultra Mod Pedal
From Keeley:
The Boss DS-1 has a very heavy metal timbre to start with. The many modifications take it 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 really needed for a high gain pedal. You will notice your new Keeley modded DS-1 has a lower noise level than a 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 of the pedal. It goes without saying that the note definition has been improved.
The final result is a pedal that provides more gain and volume while losing no note definition.
Perfect for driving Marshall stacks and other high-powered gear. This pedal has been modified to have asymmetrical clipping. This mod gives you 2nd order harmonic distortion. This has a very musical sound. At very high saturation levels it almost becomes an octave type of sound effect.
Your 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 is in
fact fun to watch but it is actually part of the secret weapon in our reworking of this pedal. The LED is part of the circuit that clips the signal and gives it that full, distorted sound. You can see that as you play heavier the LED burns brighter, providing more distortion. As the note fades the LED fades too. Play softly or roll back the volume control to clean up your guitar signal and the LED won't light or might barely come on.
Your unit has a MODE SWITCH. With the switch UP you have the Seeing Eye mode of operation. With the switch DOWN you have the Ultra mode. The 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. Recommended starting point: Try setting the Tone Control at about 10 oclock and the Level and Distortion controls at 12 oclock noon. Most modern amps are a little bright sounding so this might sound really good for a starting point. I have to admit, my favorite sound with this pedal is a crisp yet really heavy sound driving a tube amp. To set it the way I prefer, turn the Tone Control to noon and then set the Distortion and Level control to about 2-3 oclock.
From Boss:
The Benchmark in Guitar Distortion
The DS-1 Distortion is a true icon in the world of guitar effects. Introduced in 1978, BOSS’s first distortion pedal defined a bold new sound, delivering hard-edged attack and smooth sustain that’s been a staple of players for generations. The DS-1 is the top-selling BOSS compact pedal ever, and its original, unchanged design continues to inspire the creation of great music everywhere. The classic DS-1 tone is behind the signature sounds of numerous rock legends, and is ready to fuel your own signature sound today.
Features
Legendary distortion used by guitarists everywhere since 1978
Classic tones for all types of music
Hard-edged attack remains clear even at maximum distortion settings, ideal for heavy rhythms and cutting solos
Works great as a booster at low distortion settings
Unique tone control offers a wide range of sound shaping
Doesn’t mask the unique sound characteristics of different guitars, pickups, and styles
Turning down the guitar’s volume cleans up the tone without introducing muddiness
Genre-Defining Distortion
Before the DS-1, most distortion pedals produced harsh, buzzy tones and muddy sound at high gain settings. In 1978, BOSS engineers changed all that by developing a unique distortion circuit for the DS-1 that produces tight, hard-edged gain with rich harmonics while retaining the unique characteristics of different guitars and playing techniques. Hard rock, metal, and punk styles began to flourish in the ‘70s and ‘80s, and the DS-1’s tone had a defining influence on these genres. That trend has endured through multiple generations, and players around the world continue to seek out the classic DS-1 sound.
Gain from Mild to Heavy
From its modest three-knob interface, many different sound colors can be coaxed from the DS-1. Its pioneering two-stage circuit incorporates both transistor and op-amp gain stages. This approach is critical to the DS-1’s characteristic low-frequency fullness, which is loved by guitarists that play heavy music genres. The distortion knob offers an extremely wide range, from a mild boost for driving amps and pedals to full-throttle gain for monster rock riffs.
Powerful Tone Shaping
Unlike typical tone controls that only cut highs, the DS-1’s tone circuit features an innovative design that offers far more range. Turning the knob clockwise increases highs and decreases lows, while going counter-clockwise has the opposite effect. This lets you dial in everything from tight, cutting rhythm sounds to smooth, fat lead voices. The tone control is particularly effective for maintaining low-end definition when using the DS-1 as a booster with vintage-style amps, which often sound muddy when driven with other distortion pedals.
SPECS
Nominal Input Level-20 dBu
Input Impedance1 M ohm
Nominal Output Level-20 dBu
Output Impedance1 k ohm
Recommended Load Impedance10 k ohms or greater
Controls
Pedal switch
TONE knob
LEVEL knob
DIST knob
Indicator
CHECK indicator (Used for indication of check battery)
Connectors
INPUT jack: 1/4-inch phone type
OUTPUT jack: 1/4-inch phone type
DC IN jack
Power SupplyAlkaline battery (9 V, 6LR61) or Carbon-zinc battery (9 V, 6F22)
AC adaptor (PSA series: sold separately)
Current Draw10 mA
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