Building the LCR10 and SUB15 Speakers: Tips and Tricks for DIY Speaker Building

Intro

Building the LCR10 and SUB15 speakers was my first foray into the world of speaker construction, and it certainly came with a steep learning curve. Despite the challenges, I am grateful that I was able to learn most of my lessons early on by building prototypes before constructing the actual speakers that are now in my theater. The prototypes helped me both improve my personal skills as well as the design of our speakers.

I want to share some tips and tricks I discovered along the way. I hope this guide helps you avoid the same mistakes I made and ensure your speaker-building journey is as smooth and successful as possible. Whether you’re a beginner or have some experience under your belt, these lessons will be invaluable in helping you achieve high-quality results.

1. Plan

Planning is the most important step when undertaking a large project. If you are just getting into speaker design and speaker building yourself, it is essential that once you start construction, you have a good understanding of the steps and processes needed. The very first thing you should do before starting a speaker build is to plan it out, in terms of both design and construction. This planning phase involves determining the specifications of your speaker, selecting the right materials, and understanding the sequence of assembly. Planning helps ensure that you have all components and tools necessary, and helps you anticipate any potential challenges you might encounter along the way.

If you are building any of our speakers, like the LCR10 or SUB15, the guide takes care of the pre-building work as well as provides a step-by-step process in building the speakers. It is advisable that before you start the build, you read through all of the steps carefully. This will give you a comprehensive understanding of what is required during the building process and allows you to gather all necessary materials and tools, ensuring a smoother and more efficient building experience. We also provide a list of all the tools that are needed to build the speakers.

Table of contents from LCR10 Guide

2. Measure Twice, Cut Once

Double-checking all of your measurements before making any cuts can save you from numerous potential problems. Small mistakes can add up quickly, leading to gaps, misalignments, and an overall poor fit and finish for your speaker. By taking the extra time to measure carefully, you ensure that each piece fits well, which is essential for both the structural integrity and aesthetic quality of your speakers.

Being surrounded by the trades, this principle has been drilled into me my entire life, but it’s one of the easiest to forget when you get into the flow of building. I have ended up re-cutting more panels than I wanted to during the building phase because I did not follow this exact advice.

Here are some detailed tips to help you implement this practice effectively:

Repeat Measurements: Measure each dimension at least twice before cutting. This redundancy helps catch any errors that might have occurred in your initial measurement.
Mark Clearly: Use a sharp pencil or fine-tip marker to make precise marks. Ensure your lines are straight and easily visible.
Reference Points: Always measure from a consistent reference point. This ensures uniformity across all pieces and helps maintain overall accuracy.
Check Your Tools: Periodically check your measuring tools for wear and tear. Even slight damage can lead to inaccurate measurements.
Consider the Kerf: Remember to account for the width of the saw blade (kerf) when making cuts. This small detail can make a significant difference in the final dimensions.
Dry Fitting: Before final assembly, do a dry fit of all pieces to ensure they fit together correctly. This step allows you to make minor adjustments if necessary. If you are worried about the accuracy of your cuts, its always better to err on the larger side as you can always take more off.

Pro Tip: If you make a bad cut, don’t throw the piece away. It can often be used for a smaller piece.

3. Dust Control

Despite knowing that MDF (Medium Density Fiberboard) is notoriously dusty, the extent of the dust can still catch you off guard. Working with MDF generates a significant amount of fine dust, which can be harmful if enough is inhaled and can create a mess in your workspace and your house. Here are some essential dust control tips:

Protection: Use a dust mask or respirator to protect your lungs from fine particles. Get a mask that seals around your face, as MDF dust is very fine. I used these masks during the building process which were relativity comfortable.
Dust collection: Optimally, use tools that have built in dust collection or have a vacuum that is able to suck up the dust that is created while cutting and sanding.
Ventilation: Always work in a well-ventilated area to help disperse the dust if you cannot use a dust collection device like a vacuum.

When possible, work outside to prevent dust accumulation indoors. This is what I did for most of my cutting and sanding as my workshop is in the basement next to my theater. Additionally, after cutting or sanding your speaker panels, wipe them down with a cloth to remove any dust from the surface. These practices will help maintain a cleaner and safer working environment.

4. Clamps, Clamps, and More Clamps

This is one lesson I learned the hard way, making several trips back to the store during my speaker-building project. Trust me, you will always need more clamps than you initially think. The frustrating part is how quickly the expense adds up.

One of the most cost-effective solutions I discovered is to make your own clamps using pipe clamp attachments for steel pipes. By purchasing these attachments, you can then buy pipes at any length you need, creating versatile and budget-friendly clamps. This approach allows you to customize the clamps to your specific project requirements without breaking the bank.

If you’re building any of our speakers, I recommend having at least eight clamps on hand for each gluing step, but more is always better. The extra clamps will ensure that your project proceeds smoothly, allowing you to achieve the tight, secure fits necessary for high-quality speaker construction. More clamps mean even pressure distribution across the joints, leading to a stronger, more durable final product. So, stock up on clamps to make your building process more efficient and successful.

5. Everything Glue

Plan Before You Glue

Glue is a one-shot deal; once it sets, it is very hard to fix a mistake. Before applying glue, dry-fit all of your pieces together to ensure everything lines up perfectly. Mark alignment points and ensure you know the exact order in which you’ll assemble the pieces. This preparation will help you avoid costly mistakes and save time in the long run.

I like to label mating edges so that I can be sure that I am putting the pieces together the same way I laid them out.

Don’t Be Afraid to Use Too Much Glue

When it comes to gluing your speaker components, it’s better to use too much glue than too little. Excess glue can always be wiped away, but insufficient glue can lead to weak joints that might fail over time. Make sure to apply a generous amount of glue to all surfaces being joined. The goal is to achieve a strong, durable bond that will hold up to the stresses and vibrations of speaker operation. If you see glue oozing out of the joints when you clamp the pieces together, that’s a good sign you’re using enough.

Glue is Sticky and Messy

Be prepared to get messy when gluing up the speakers. Ensure you have a clean, well-protected workspace and do not wear your favorite clothes. Keep a damp cloth or sponge nearby to quickly wipe away any excess glue before it dries.

Most wood glue is water soluble so if you do get it on any clothes it should come out, but it is always better to sacrifice clothes that you won’t miss in the first place. Using painter’s tape along the edges of your joints can help prevent glue from seeping onto surfaces you want to keep clean. Additionally, placing cardboard or newspaper under the piece can ensure that you don’t dirty up your workspace.

6. Embrace Mistakes

Even if you follow all of the above tips, mistakes will happen—it’s all part of the process. When they do, take a deep breath and don’t let them bother you. Accepting mistakes as a natural part of any project allows you to maintain a calm and focused mindset. This approach enables you to think of a solution to the problem sooner and get back on track more efficiently. Remember, each mistake is an opportunity to learn and improve your skills. Embrace the journey, and don’t let setbacks discourage you.

Bonus Tip: You Don’t Have to Be Perfect

While precision is important, don’t stress over minor imperfections. It’s easy to get caught up in achieving flawless craftsmanship, but even seasoned builders encounter small errors. Remember that wood filler and sanding can correct small gaps or misalignments, allowing you to achieve a smooth, seamless finish.

The final finish will hide many minor flaws, so focus on getting the overall structure solid and well-built. A strong, well-constructed foundation is more crucial than minor cosmetic issues, which can be addressed later in the process. Embrace the fact that some imperfections are part of the learning process and can be fixed as you go along.

Additionally, remember that many minor flaws will be hidden once the project is completed and in use. Whether it’s a small gap in a joint or a slight misalignment, these issues often become less noticeable once the speakers are installed and functioning. Prioritize functionality and durability over perfection in the initial stages, and take your time to refine the cosmetic details later. This approach will help you maintain a positive mindset and enjoy the building process more.

Safety First

I cannot stress this enough: Safety First. There is no need to rush and risk injury when making speakers. Always wear safety glasses, hearing protection, and appropriate clothing. Use push sticks and feather boards to keep your hands away from cutting blades. Take your time and work methodically to ensure your safety throughout the project.

Thank you for reading, I hope that these tips can save you some heart ache for your next speaker build.

If you are into high-end home theater or thinking of building your own speakers, check out our Speaker Designs to maximize your home theater experience!