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Description
Stereo Integrity TM8 - Midbass SetWelcome to the TM8 loudspeaker. A completely new low distortion driver designed in Finite Element Analysis here in North Carolina. Our TM8 uses our custom tooled cast aluminum basket with an integrated rain shield and a very shallow mounting depth of only 2. 3. Twin shorting rings lower and linearize inductance for an Xmax: Le ratio only found in significantly higher priced loudspeakers. With good sensitivity and 7 mm of Xmax the TM8 effortlessly
Welcome to the TM8 loudspeaker. A completely new low distortion driver designed in Finite Element Analysis here in North Carolina. Our TM8 uses our custom tooled cast aluminum basket with an integrated rain shield and a very shallow mounting depth of only 2.3″. Twin shorting rings lower and linearize inductance for an Xmax:Le ratio only found in significantly higher priced loudspeakers. With good sensitivity and 7 mm of Xmax the TM8 effortlessly provides pant-leg-slapping midbass. Power handling and linear inductance characteristics are accomplished by its 50 mm voice coil with solid copper windings mated to the pure aluminum cone body. The pure aluminum cone body was carefully designed with the best strength-to-weight ratio to allow for proper frequency extension and strength for midbass / deep bass extension. Perhaps most importantly is the combination of the copper voice coil, CZA former, and aluminum cone also offer tremendous thermal advantages as they all work in tandem to extract and disperse heat from the voice coil which increases thermal power handling.
We designed our TM8 with a higher-than-average Qts. The main install location for our TM8’s is in a vehicle door. A vehicle door is a very lossy enclosure that closely mimics an Infinite Baffle alignment. To achieve the most performance from an Infinite Baffle alignment you want your Qts to be close to a 0.707 Qtc alignment of a sealed enclosure, which is why our TM8’s Qts is in the 0.8 region. With our Qts close to a 0.7 it yields the best combination of low-frequency extension and natural output capability. Our TM8 is for those of you who want a plethora of midbass capability without sacrificing mounting depth and/or price.
Our TM8’s primary purpose is for use as a midbass driver. Its on-axis frequency response does extend up to 4,500 Hz so it can be mated to our M3 Carbon midrange and M25 mkII tweeter for a 3-way setup or mated up directly to our M25 mkII tweeter for a 2-way setup.
In-vehicle frequency range is 27 Hz to 7,000 Hz. We recommend a high-pass crossover frequency of 40 Hz or higher. Recommended high-pass crossover slope is equal to, or greater than, 24 dB/octave. Recommended crossover frequency for a 2-way setup is 3,000 Hz. Klippel measurements can be viewed by clicking the images above.
- 2″ diameter copper voice coil
- CZA Voice Coil Former
- Aluminum Cone
- Rubber Surround
- Nomex spider
- Copper pole sleeve
- Magnet ID shorting ring
- Custom tooled cast aluminum basket
- Integrated rain shield
- Push terminals
- Single 4 Ohm voice coil impedance
- Designed specifically for IB use (in a vehicle door)
Component Speakers Specifications
Quick InfoWeight 4 lbs Dimensions (OD) 209 mm Dimensions (Cutout) 183 mm Mounting Depth 58 mm RMS 150 watts Impedance 4 Ohms Thiele-Small ParametersRe 3.8 Ohms Fs 58 Hz Qes 1.08 – Qts 0.83 – Le 0.19 mH Sd 35.17 square inches Vas 17.1 Liters BL 6.35 Tesla Meters Mms 32.3 grams Cms 233 µM/N Xmax 7 mm one-way 70% BL Xmech 11 mm one-way SPL 90 dB MaterialsSurround Material Rubber – Cone Material aluminium – Voice Coil Material copper – Magnet Material Ferrite – Enclosure RecommendationsSealed Enclosure Volume 0.2 cubic feet Maximum Sealed Enclosure Volume 1.5 cubic feet Ported Enclosure Volume 3.0 cubic feet Minimum Ported Enclosure Volume 2.5 cubic feet Maximum Ported Enclosure Volume 3.5 cubic feet Ported Enclosure Tuning 28 Hz Port Surface Area 7 square inches Performance & ComplianceFrequency Response Minimum 25 Hz Frequency Response Maximum 6000 Hz Sensitivity 90 dB Additional SpecificationsVoice Coil Diameter 50 mm Terminal Type Spring – Basket OD Flange Thickness 4.2 mm Gross Weight 4 lbs
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4.7 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 3
Overpromises and underdelivers but has some good advice
Format: Hardcover
The idea of this book is not necessarily to make someone rich overnight, but to help some get just rich enough to abandon full-time work and maximize profit over a shorter time so the individual can enjoy whatever he wants to do the rest of the time. In the author’s case, that seems to involve a lot of travel and beaches and that sort of thing. In my case, that involves…different work. I really don’t want to work just four hours, but I was hoping the book would have some good insights into methods of automation and streamlining that might help move me toward dedicating more time to DIFFERENT kinds of work than the mundane things that unfortunately seem to dominate too much of our lives.
All in all, I’d call the book a mixed success. It’s a good mix of some ideas that ought to be self-evident to anyone with a working brain, some genuinely good insights I hadn’t necessarily considered before, and some motivational stories to “prove” the ideas really can work.
Unfortunately, the motivational stories don’t really prove much of anything except that certain ideas worked for certain individuals in certain circumstances, and very few of those are applicable (or even interesting) to the vast majority of readers, so we can immediately dismiss a good chunk of the book as mere filler. But what about the rest? Is there really good information here?
Well, yes and no. The book does commit the same sin just about every business book in the world (certainly all the popular ones) commit: it overpromises and underdelivers. If you’re working a nine-to-five, even perfect execution of 100% of this book’s ideas will never get you down to four hours per week unless you invent something that completely automates your job (but of course without your employer finding out about it) or generates plenty of passive income. The author’s selling a pipedream.
That said, if you look past the exaggerated claims and put on an entrepreneurial hat, there actually is plenty of good advice in here about managing your time more effectively and plenty of resources to tools and services you can use to take some of the burden of the mundane off your own back and place it (sometimes at surprisingly low cost) somewhere else.
At the end of the day, I found plenty of useful information in here. But for a book largely about liberating oneself from wastes of time, it really should’ve been half as long at the longest.
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Reviewed in the United States on December 31, 2025
★★★★★ 5
Which Life Changes are you Open to?
I was given a copy of Tim's book at a business conference I went to. I thought the title was catchy and the cover well designed. On top of that, several people in the room had recently read it and said it was a MUST READ.
As an active business person and somebody who relies on distilled experience from people in the trenches (often in their books or courses) I wasn't resistant to this book. However, based on my already full schedule, I wasn't sure when I'd fit a thick book into my reading program.
After ten day, the title kept nagging at me. I wanted to just get into this book if for nothing else to grab some ideas from the TOC. I told myself if I just got one idea I could put the book down and move on. What I found was more than one great idea.
First, the book is a VERY good read. It flows well with a mix of Tim's personal experience and resources. It took me two extended reading sessions over a weekend to finish it.. and that led to some interesting results.
I was able to immediately apply some of the ideas for outsourcing and virtual assistance to get ideas started that had been put on permanent hold. Tim's ideas gave me great content to share with others and I ended up giving my copy to a friend in my Toastmasters group - just requesting a book report in return.
She read the book in about a day and a half and gave me a three-page email report. It was solid. She wasn't a total believer of 100% of the content or Tim's approach but really liked the possibilities the concepts made her think of. We discussed it over the weekend and it made for great conversation about outsourcing.. what "work" really means and why the career track is wrong in so many ways given the internet, a global economy, and a 24/7 way to get your products and services into people's lives.
I realized after talking to another friend that I had indeed already met Tim. Of course, it was prior to his book's release and we only had a few conversations while at another conference, but Tim is the real deal. He's not as intimidating as the choke-holds on his web site pictures might intimate. He's clearly confident, fit, and well spoken. And now having read his book full of experiences, I can see why.
How to read this book: Okay, if you've read this far, let me share a couple of ideas. 1. You don't need to make $40,000 per month and work only a few minutes each day to be successfuly and happy. (But, when you start doing what I like to call "Internet Math" you'll see why these numbers aren't really impossible.
Tim's ideas work for him and many WILL work for you - making you more productive while increasing your income and your enjoyment. Even just thinking about what's possible puts me in an enjoyable frame of mind.
2. Get through the book and share it with a couple of friends who want more than their current job offers. You'll know these people because they can't seem to feel content building somebody else's dreams. The ideas lead to very stimulating conversations that will expand what you believe is possible.
Don't dismiss the book because of the title. A four-hour work week is a very real possibility given an internet-based business. If you're not already part of this culture, you will need to invest (to speed up the process) and learn. But that's true if you want anything.
3. Realize that the 4-Hour work week does not mean don't work as much as it means work SMARTER. I'm sure Tim has lots of things he's working on that he absolutely loves.. and thus spends more than 4 hours each week in action. But it's likely not considered "work" in the labor definition.
"If you love what you do, you'll never work a day in your life." Believe that.. let this book give you some ideas for that.
Finally, I think the book is in the wrong place in the bookstores. I found it on the Self-Help shelves in Borders. It should definitely be in the Entrepreneur or Business section - the publisher might need to re-classify.
At first, I wanted to keep this book a secret.. because some of the ideas seem so ... well.. valuable. Then I realized that if I shared the ideas with my friends, maybe we could all implement them and start some business projects that lead to us having more time to play. So far, I can say that it is happening. Thanks Tim for a brave title.
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Reviewed in the United States on May 29, 2007
★★★★★ 5
Transform Your Life and Work: Achieve More by Doing Less with 'The 4-Hour Workweek
Format: Hardcover
I just had to share my thoughts on "The 4-Hour Workweek" by Tim Ferriss, a book that has been a game-changer for me, both professionally and personally. As someone who's deeply involved in helping others unlock their potential and transform their lives, I can't stress enough how valuable this book has been.
Why This Book is a Game-Changer
Empowering Lifestyle Design:
Ferriss’s DEAL framework (Define, Eliminate, Automate, Liberate) is a clear roadmap for creating a life that prioritizes meaningful experiences over conventional work routines. It aligns perfectly with my approach to transformation, emphasizing the importance of living a balanced and purposeful life.
Efficiency and Productivity:
The book's emphasis on the Pareto Principle (80/20 rule) and Parkinson's Law has revolutionized how I manage both my work and personal projects. By focusing on the critical 20% of activities that yield 80% of the results, I've been able to streamline my efforts, achieving more in less time. This is something I actively teach my clients to help them eliminate unnecessary tasks and focus on what truly matters.
Overcoming Fear and Taking Action:
Ferriss's insights on overcoming fear and taking bold steps are incredibly empowering. His framework for evaluating worst-case scenarios and preparing for them has helped me and those I mentor to move past paralyzing fears and take decisive action. This approach is crucial in encouraging a mindset of resilience and proactive problem-solving.
Selective Ignorance and Focus:
The idea of a low-information diet has been revolutionary for me. By cutting out unnecessary information and focusing only on what is immediate and actionable, I’ve been able to maintain a clearer mind and better focus on my creative and entrepreneurial endeavors. In today’s information-overloaded society, this concept is a lifesaver.
Practical Application and Sharing:
Recognizing the transformative potential of this book, I’ve bought multiple copies to give to struggling friends and fellow entrepreneurs. Ferriss’s strategies are not just practical but also inspirational, offering a new perspective on work and life. By sharing this book, I aim to empower others to break free from the traditional 9-5 grind and create lives filled with purpose and freedom.
In summary, "The 4-Hour Workweek" is more than just a guide to working less; it’s a manifesto for living more intentionally and efficiently. The principles in this book have significantly influenced my work and personal philosophy, making it a vital tool in my toolkit for transformation. I wholeheartedly recommend it to anyone looking to redefine their relationship with work and achieve a more fulfilling, balanced life.
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Reviewed in the United States on June 5, 2024
★★★★★ 5
Book
Format: Hardcover
Great reflection on relationships and goals in a relationship
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
★★★★★ 5
Relationship Goals
Format: Hardcover
Excellent book for couples. Best book I have read regarding relationships.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
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