When it comes to guitar effects pedals, the Boss MT-2 Metal Zone is a classic. Known for its heavy distortion and versatile tone, it has been a favorite among guitarists in various genres for decades. However, some players find that the stock MT-2 tone can be a bit harsh and lacking in depth. That’s where the Keeley Mod comes in.
The Keeley Mod is a popular modification that alters the internal circuitry of the MT-2, giving it a smoother, more balanced tone. The mod addresses some of the common issues with the stock MT-2, such as excessive mid-range scoop and a harsh high-end. By making changes to certain components, the Keeley Mod helps to enhance the pedal’s overall tone and make it more suitable for a wider range of musical styles.
If you’re interested in trying out the Keeley Mod for yourself, it can be helpful to have a schematic of the modified circuit. The schematic provides a visual representation of the circuit and shows the connections between different components. This can be particularly useful if you’re planning on doing the mod yourself or if you’re working with a technician to make the modifications.
In this article, we will provide a detailed Boss MT-2 Keeley Mod schematic, allowing you to see exactly how the modified circuit differs from the stock MT-2. We will explain the changes made to the circuit and discuss the impact they have on the pedal’s tone and performance. Whether you’re a seasoned modder or just curious about the inner workings of guitar pedals, this schematic will provide valuable insights into the Keeley Mod for the Boss MT-2 Metal Zone.
Boss MT-2 Keeley Mod Schematic: A Complete Guide
The Boss MT-2 Keeley Mod is a popular modification for the Boss MT-2 Metal Zone distortion pedal. This modification, developed by renowned guitar pedal modifier Robert Keeley, aims to enhance the tone and versatility of the pedal. In this guide, we will provide a complete overview of the Keeley Mod schematic and explain how it can be implemented.
Overview of the Keeley Mod Schematic
The Keeley Mod schematic for the Boss MT-2 consists of several modifications that can be made to the original circuitry of the pedal. These modifications include changes to the clipping diodes, EQ section, and output buffer, among others. The purpose of these modifications is to reduce the harshness and improve the overall tone of the pedal, making it more suitable for a wider range of musical styles.
Implementing the Keeley Mod
To implement the Keeley Mod, you will need to follow the provided schematic and make the necessary changes to the circuitry of the Boss MT-2 pedal. This may involve soldering and desoldering components, as well as replacing certain parts with new ones. It is recommended to have some experience in pedal modification or seek the assistance of a professional if you are not familiar with this process.
Benefits of the Keeley Mod
The Keeley Mod offers several benefits to the Boss MT-2 Metal Zone pedal. One of the main advantages is improved tone and versatility. The modified pedal provides a smoother and more musical distortion sound, with less harshness and more dynamic response. It also offers better control over the EQ section, allowing for more precise shaping of the tone. Additionally, the Keeley Mod reduces the noise and hiss often associated with the original MT-2 pedal, making it more suitable for recording and live performances.
Conclusion
The Boss MT-2 Keeley Mod is a highly regarded modification for the original MT-2 Metal Zone pedal. With its enhanced tone and versatility, the Keeley Mod allows guitar players to achieve a wider range of musical styles and tones. By following the provided schematic and making the necessary circuitry changes, you can successfully implement the Keeley Mod and take your MT-2 pedal to the next level.
Overview of the Boss MT-2 Keeley Mod
The Boss MT-2 Keeley Mod is a popular modification for the Boss MT-2 Metal Zone pedal, designed by Robert Keeley. This mod aims to improve the overall tone and versatility of the pedal, making it a favorite among guitarists looking to enhance their metal and heavy rock sound.
The MT-2 Keeley Mod features several modifications to the original circuitry of the Boss MT-2 pedal. One of the main changes is the addition of a diode clipping section, which helps to smooth out the overdrive and distortion tones, resulting in a more dynamic and responsive sound. This modification also increases the sustain and improves the overall clarity of the pedal.
Another important modification in the Keeley Mod is the inclusion of a three-band EQ section. This allows for a more precise control over the tone, allowing guitarists to shape the low, mid, and high frequencies to their liking. The new EQ section also helps to reduce the inherent harshness and fizziness often associated with the stock MT-2 pedal.
The Boss MT-2 Keeley Mod also includes a high-gain switch, which adds an extra level of gain and saturation to the pedal. This switch can be engaged to push the pedal into even heavier and more distorted tones, making it ideal for genres like metal and hard rock.
In addition to these modifications, the Boss MT-2 Keeley Mod also boasts improved bypass switching, reducing the loss of signal when the pedal is turned off. This ensures that the original tone of the guitar is preserved when the pedal is not in use.
Overall, the Boss MT-2 Keeley Mod is a highly sought-after modification for the Boss MT-2 Metal Zone pedal. It provides guitarists with a better tone, increased versatility, and improved overall performance, making it a valuable addition to any rig.
The Importance of the Schematic
The schematic is a crucial element in the modification process of the Boss MT-2 Keeley mod. It serves as a blueprint or roadmap that guides the technician or DIY enthusiast in understanding the circuitry and making the necessary modifications. Without a proper schematic, it would be difficult to identify and modify specific sections of the circuit.
One of the key advantages of having a schematic is that it allows for easy troubleshooting and debugging. If any issues arise during or after the modification process, having a schematic can help pinpoint the source of the problem. By tracing the signal flow and comparing it to the schematic, it becomes easier to identify any potential faults or errors that may have occurred.
Furthermore, the schematic provides a clear overview of the different components and their connections within the circuit. This allows for better understanding of the circuit’s functionality and facilitates the modification process. By referring to the schematic, one can easily identify the different resistors, capacitors, transistors, and other components used in the Boss MT-2 Keeley mod. This information is crucial for selecting the appropriate replacement components or making any necessary changes.
Additionally, the schematic serves as a valuable learning tool. By studying the circuit diagram, one can gain a deeper understanding of electronics and how different components interact with one another. This knowledge can be applied to other circuitry projects and can help improve overall proficiency in electronics.
In conclusion, the schematic is an essential resource for anyone undertaking the Boss MT-2 Keeley mod. It provides a clear visual representation of the circuit, facilitates troubleshooting and debugging, aids in component selection, and enhances overall understanding of electronics. With a well-documented schematic, the modification process becomes more manageable and the results more predictable.
Understanding the Keeley Mod Schematic
The Keeley Mod is a popular modification for the Boss MT-2 Metal Zone pedal that is known for its ability to improve the sound and versatility of the pedal. The mod involves making changes to the circuitry of the pedal to enhance its tone, dynamics, and overall performance.
The Keeley Mod schematic provides a detailed diagram of the modifications that need to be made to the MT-2 pedal. It outlines the specific components that need to be added, removed, or changed in order to achieve the desired results. By following the schematic, guitarists and electronics enthusiasts can make the necessary modifications to their pedals and enjoy the improved sound and performance.
The Keeley Mod schematic typically includes instructions for replacing certain resistors, capacitors, and diodes in the MT-2 pedal. It may also include information on adding new components, such as op-amps or transistors, to enhance the pedal’s performance. The schematic is a valuable resource for those who want to understand the inner workings of the pedal and make informed decisions about the modifications they want to make.
It is important to note that the Keeley Mod schematic is not the only way to modify the MT-2 pedal. There are multiple versions and variations of the Keeley Mod, and different builders may have their own modifications and tweaks. The schematic serves as a starting point and a guide, but it is not set in stone. Experimenting with different components and values can lead to unique and personalized modifications that suit individual preferences and playing styles.
In conclusion, the Keeley Mod schematic is a valuable tool for guitarists and electronics enthusiasts who want to improve the sound and performance of their Boss MT-2 Metal Zone pedal. By understanding and following the schematic, users can make the necessary modifications to their pedals and enjoy a more versatile and toneful pedal. Remember to experiment and tweak the modifications to suit your personal preferences and playing style.
Gathering the Required Components
Building your own Boss MT-2 Keeley Mod requires gathering the necessary components. Here is a list of the basic components you will need:
- Boss MT-2 pedal: You will need the original Boss MT-2 Metal Zone pedal as the base for the Keeley mod. If you don’t have one, you can purchase it from various online retailers or local music stores.
- Replacement IC: The first step in the Keeley mod is replacing the TL082 op-amp chip with a TL072 op-amp chip. This replacement chip can be easily found online or at electronics stores.
- Replacement diodes: The mod also involves replacing the stock diodes with new diodes to modify the clipping characteristics of the pedal. The specific types of diodes used in the Keeley mod can vary, but common options include 1N4148, 1N914, or similar diodes.
- Resistors and capacitors: You will also need various resistors and capacitors to modify the circuit. The exact values and types of resistors and capacitors will depend on the specific modifications you want to make, so it is important to consult the schematic or modification guide for the Keeley mod you are following.
- Soldering iron and solder: To make the necessary modifications to the circuit, you will need a soldering iron and solder. It is recommended to use a soldering iron with adjustable temperature settings for better control.
Once you have gathered all the necessary components, you will be ready to start the modification process. Make sure to carefully follow the schematic or modification guide you are using, and take your time to ensure the modifications are done correctly.
Step-by-Step Guide to Modifying the Boss MT-2
The Boss MT-2 is a popular distortion pedal known for its aggressive and heavy tone. However, some guitarists may find the stock MT-2 to be lacking in certain areas. This is where the Keeley mod comes in. The Keeley mod aims to improve the overall sound and versatility of the MT-2 by making specific modifications to the circuitry.
Gather the necessary tools and materials: Before starting the modification process, make sure to gather all the required tools and materials. This includes a soldering iron, solder, wire cutters, needle-nose pliers, desoldering pump, and the Keeley mod kit, which includes the necessary components for the modification.
- Remove the back plate: Start by removing the back plate of the MT-2 to gain access to the circuit board. This is usually done by unscrewing the screws on the back of the pedal. Once the back plate is removed, set it aside.
- Identify the components: Take a close look at the circuit board and familiarize yourself with the components. Locate the resistors, capacitors, and IC chips that need to be replaced or modified according to the Keeley mod instructions.
- Desolder the components: Next, use the soldering iron and desoldering pump to remove the components that will be replaced. Carefully heat up the solder joints and use the desoldering pump to suck up the molten solder. Once the solder is removed, gently lift the component with the needle-nose pliers.
- Install the new components: After removing the old components, it’s time to install the new ones according to the Keeley mod instructions. Make sure to orient the components correctly and solder them in place. Trim any excess wire or solder to keep the circuit board tidy.
- Test and troubleshoot: Once all the new components are in place, it’s important to test the modified MT-2. Connect the pedal to your guitar and amplifier, and play around with the different settings and controls. If you notice any issues or anomalies in the sound, double-check your solder joints and connections.
- Reassemble the pedal: Once you’re satisfied with the modified MT-2’s sound and performance, it’s time to reassemble the pedal. Put the back plate back on and secure it with the screws. Make sure everything is tightened properly.
This step-by-step guide provides a general overview of the process of modifying the Boss MT-2 using the Keeley mod. However, it’s important to note that modding a pedal requires a certain level of technical skill and knowledge. If you’re unsure or uncomfortable with soldering and circuitry, it’s recommended to seek the assistance of a qualified technician or experienced pedal modder.
Testing and Troubleshooting
When it comes to testing and troubleshooting the Boss MT-2 Keeley mod, there are a few key steps you can take to ensure everything is functioning properly.
1. Visual Inspection: Start by visually inspecting the circuit board and components. Look for any loose connections, broken traces, or burnt-out components. Check the solder joints for any cold joints or bridges. This initial inspection can often reveal any obvious issues that need to be addressed.
2. Signal Flow Analysis: Understanding the signal flow in the circuit is crucial for troubleshooting. Refer to the schematic and identify each component’s purpose and its location in the signal path. Use a multimeter to trace the audio signal through the circuit and locate any points where the signal may be dropping or distorting.
3. Component Testing: Test each individual component to ensure they are functioning correctly. Use a multimeter to check resistors, capacitors, diodes, and transistors. Look for any values that are significantly different from the specifications or any components that are completely open or shorted.
4. Voltage Measurements: Measure the voltages at various points in the circuit using a multimeter. Compare these measurements to the values specified in the schematic. Significant discrepancies may indicate a problem with the power supply or other parts of the circuit.
5. Input and Output Testing: Connect a guitar and amplifier to the pedal and test the input and output signals. Check for any unwanted noise, distortion, or loss of signal. If there are any issues, trace the signal path through the circuit using a multimeter and isolate the section causing the problem.
By following these steps, you can effectively test and troubleshoot the Boss MT-2 Keeley mod and identify any issues that may be affecting its performance. Remember to approach troubleshooting with patience and attention to detail, as it may require some trial and error to pinpoint the exact problem.