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New Passive Model 100

Model 100

We are pleased to introduce a passive version of the Model 100. We have long thought about how we could reduce the price of entry for our much heralded Model 100.

 The passive Model 100 is essentially the same as the Model 100 with the exception that the subwoofer is passive. The performance specifications are roughly the same as those for  the active Model 100 set to our recommended settings. In addition, the passive Model 100 is designed  so that the active subwoofer feature can be added later.

In general, the price of the passive Model 100 is $2,000 per pair less then the Model 100s with active subwoofers. The prices are: $9,995 for black and light wood, $10,495 for natural birch plywood or red birch plywood, and $10,995 for sapele plywood. Other finishes  and options are available at additional cost. Kindly email us if you have questions.

Differences Between Transmission Line And Acoustic Suspension Speaker Designs

I received an email recently from someone who was questioning my approach to transmission line speaker design as a special case of acoustic suspension speaker design. He said his first speakers were AR 2A speakers. He said he is “a big advocate of sealed boxes since there's no question properly designed they have better bass control than ported designs(no matter how well they are designed.”

His said his “second speakers were IMF Studio 2 transmission lines and living in Philadelphia [he] became a life long pal with Bud Fried.” He said he knows something about transmission lines and “don't get the comparison I make with transmission line and acoustic suspension speakers.” To quote: “I might add that Bud would be rolling in his grave with the comparison. He [Bud Fried] disliked acoustic suspension speakers. “I'm not trying to be smart [He said.]. It's just that your comments take me back to my early days and I'm seriously asking for an explanation that I didn't find on your web site.”

In my reply I mentioned that I met Bud Fried at summer CES in Chicago 1992/1993 where we were both exhibiting and that at the time I had no particular interest in transmission line designs and that I hope Bud is tolerant of other ideas and is resting peacefully. 

Rather than write a long treatise defending my approach, I referred him to to read reviewers' comments about  the following acoustic suspension speakers: Skiff, Kayak, Discovery,  and then to read reviewer's comments about the acoustic suspension speaker's transmission line analogues: Sampan, Windjammer, Enterprise, especially with reference to the Sampan, Windjammer and Enterprise bass performance. In each case the transmission line speaker is using the same exact driver and the same crossover components as its  acoustic suspension  analogue. The primary difference is the cabinet.

I have a totally different approach to TL design and as you can see it works.



As an addendum, I note the following quote regarding Bud Fried's role in promoting TL designs:

"Of course, Bud, had called it the IMF, and therefore, perhaps mistakenly we registered IMF and formed an IMF company... At no time did Bud Fried have any input on the designs. We sold him speakers and he was the US Distributor... Bud Fried was never a Director or shareholder of IMF Electronics. IMF electronics were the only company manufacturing the transmission line speakers. The name IMF was adopted because Bud Fried had demonstrated the first prototype speakers at the New York hi fi show, and because of the publicity and the fact that he had used his name on the then unnamed speakers, we stuck with the name which was a mistake on our part. It was never his company. After our lawsuit he called his speakers Fried."

It seems Bud Fried may not have been the theoretician of TL speaker design he and others claimed he was. You can read more here under "Classic era transmission line loudspeakers."



Coming: A new Model 20M Armada Sysyem


NSMT 20M Armada Speaker System
Cabinetry: hand rubbed walnut plywood (also available in other finishes)

Frequency response: 20 Hz - 20 kHz

Height 42 inches


The new 20M Armada speaker system is a combination of the latest version of our 20M minimonitor and our new active Bass Foundatioon subwoofer. Previously the 20M Armada system consisted of a pair or 20Ms, two 15 EXP subwoofers and a pair of custom NSMT Sandbags speaker stands, as shown here. Instead of stands and subwoofers the new 20M system uses two Bass Foundations subwoofers as platforms to create a transcendent high fidelity system.

The Model 100 Advances

NSMT MOdel 100

Shown: light sapele plywood 

"...these are the best speakers I have ever heard..."

"These unassuming speakers may be the best on the market today."

Since Terry London's review of the Model 100 in Six Moons, we have made the following improvements to the Model 100. First, we replaced the 200 watt 115 volt subwoofer amplifier with a more powerful and more versatile 250 watt 115/230 volt amplifier. Second, we replaced the subwoofer with a more powerful paper cone subwoofer that has more linear frequency response and produces more lower bass energy. Third, we replaced the stamped steel frame woofer with its deluxe cast version which has a more linear response. As a result, the speaker with arguably the best bass on the market now has improved and more extended bass performance and improved performance across the board. Frequency response is 20 Hz to 20 kHz +/- 2.5 dBs. These improvements have been made with no increase in the price of the Model 100 so far.

With regard to cosmetics, we are now offering matching wood plinths with color coordinated ports as a $995 option. The Model 100 is now available in sapele, walnut, and natural birch plywood, and natural cherry and satin black MDF cabinets. Other finishes are available at additional cost.

We are offering WBT terminals as an option and we can accommodate your choice of optional crossover components.

We Proudly Introduce The EXP-8 Acoustic Suspension Subwoofer



NSMT Acoustic Suspension Subwoofer

Price $695.





The EXP-8 is a potent, compact (11.5 X 11.5 X 11.5 inches), self- powered, acoustic suspension subwoofer system designed for high-end music and home theater systems. It uses a custom long-throw 8 inch paper cone woofer and a 300 watt full featured amplifier to produce fast, accurate bass response.

The EXP-8 bass is exquisite and extended with extremely accurate transient response. Not the one note samba delivered by most subwoofers.

The acoustic suspension design and forward facing driver produces faster, more coherent, and more extended bass response and allows the subwoofer to be placed close to walls.

The gutsy full-featured 300 watt RMS amplifier with volume, variable crossover, and 360 degree variable phase control allows the EXP-8 to provide an exceptional level of performance and flexibility.



EXP-8 Amplifier

Highlighted Features

  • Acoustic suspension design for better transcient response and bass clarity
  • Compact design allows greater placement  flexibility
  • Non-toxic satin black cabinet is finished with a beautiful certified environmentally-friendly finish 
  • Class D amplifier circuit with switching power supply provides excellent efficiency
  • Fully adjustable phase, gain, and crossover points ensure system optimization
  • Low-level, high-level, and LFE inputs
  • Capable of sustained, continuous output without thermal shutdown
  • Built-in limiter circuit protection prevents peak overloads
  • Manual and automatic on/off mode options
  • Switchable 115/230V input voltage



Positive Feedback reviews the Model 100

NSMT Model 100

"... the deepest most powerful ... drum whacks that I have ever heard." " ...the minutest of detail without fatigue."
"...built like the proverbial Abrams tank."

Our thanks to Francisco Duran of Positive Feedback for this thorough and insightful review of the the Model 100. Among his comments:

"...detail and dynamics sounded natural and not overdone for the sake of reproducing good stereo."

"These speakers have the ability to wring out the minutest of detail without fatigue."

"...the M-100 clearly showed me just how deficient my regular speakers handle deep bass on movies."

"Their reproduction of timber and tone is very natural and very realistic. And they are built like the proverbial Abrams tank. Mix that all together and you have one hell of a musical speaker very capable of easily drawing you into whatever you listen to with the greatest of ease."

(Francisco Duran , Positive Feedback, Issue 92, 07-01-2017)

One of the strengths of the Model 100 is that it can be driven extremely well by low powered and inexpensive amplifiers because of its built in active subwoofers and the efficiency of the monitor section. To prove the point Francisco Duran discribes how the NSMT modified Lepai amplifer outclassed all his reference amps driving the Model 100. He says:

"I heard an accurate tonal balance, natural timbres, nice decay of instruments and I could play the system as loud as I wanted with this little amp in the system thanks to the efficiency of the woofer/tweeter section of the M-100. Kicking in the subwoofers was icing on the cake. For sheer irony and bang for the buck, this was the best amp I used with the M-100's. Save yourself some money and invest in some kind of remote for the little Lepai because it doesn't come with one. While you're at it go and tell the emperor he is naked. This little amp can cook and it thoroughly embarrassed the hell out of the amps I have laying around my house."

(Francisco Duran , Positive Feedback, Issue 92, 07-01-2017)

Imagine, audiophile nervana with the Model 100 and the little NSMT Lepai.

You can read the review here.

Read more about the Model 100 here.