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classic series 
 Model 10S

classic series
 Model 15

classic series
 Super Monitor

subwoofer
Model EXP
 

subwoofer
Model 15EXP

mastering series
Model 20M

mastering series
Model 30M

mastering series
Model 100M

decorator series
the Chorus

 Sandbag
Stands

 Model 10S

Model 15

PSM Super Monitor

EXP Sub 

15EXP Sub 

20M

 30M

100M 

 The Chorus
 

 The Mastering Series
Time Coherent, First Order, Point Source, Loudspeakers

buy direct

 20M in-wall
 the 20M 

the 30M

the 100M

design white paper 

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 NSMTHome

Read new review of 20M Amarda System on Stereo Times


Images better than Revel Performa M20

Images better than Mirage MRM-1

Images better than Merlin TSM-SE

Images at least as good as the JMlab Mini Utopia

 

"Small Footprint, Big Sound."
Stereo Times

"I sat mesmerized by the precision with which the instrument was rendered."
soundstage.com

Here is what an audio mastering engineer said about the 20M and two 15 EXP subwoofer Armada System:

"I purchased a complete 20M Armada system (with two 15 EXP subwoofers) over a year ago which I use daily for audio mastering. This system has simply allowed me to get closer to creating a perfectly balanced master than I ever thought possible."
Kurt Lundvall, Lundvall Mastering

 

 

 New 20M
dimensions

 14 X 9 X 10
driver array

 7 inch cast frame TPX cone with one inch soft dome tweeter
 grill

 yes
 inductor

 air core
 capacitor

  film foil
 biwireable?

yes
 cabinet

eco-friendly
(sealed against emissions)
 cabinet finish

 walnut veneer and Peruvian walnut inserts
adheisives and paints

 non-toxic

The New 20M Ambient Sound Monitor
(formerly MasterSource Audio 20M)
20 M on optional Sandbags stands

"masterful imaging"

$2,995 per pair

Buy DIrect

The 20M Ambient Sound Monitor

The 20M is a time coherent, point source, first order, two-way acoustic suspension loudspeaker system that is the result of years of research, innovation, and independent thinking, that have yielded many evolutionary refinements. As a result the 20M has exceptional ability to accurately reproduce music and to retrieve the ambiance of the musical performance.

As proof of the "rightness" of the design, few loudspeaker image as well as the 20M.

Several features contribute to the performance of the 20M. The 20M's combination of time coherent, point source, first order, two-way, acoustic suspension designs coupled with innovative cabinet and crossover designs and accurate voicing, make the Model 20M incredibly true to the source.

As a result of its time coherent, point source, coincident driver array, the woofer and tweeter have identical acoustic centers and identical directivites at the crossover frequency. This produces a stable axiosymmetrical radiation pattern with smooth power response.This is further enhanced by a high quality minimalist first order crossover network.

The cabinet of the 20M is finished in real walnut wood veneer. It is elaborately braced and the rear panel is sloped two degrees to eliminate box resonances and colorations. Furthermore, the vertical edges of the cabinet are accentuated with exotic Peruvian walnut hardwood inserts that are rounded to prevent sonic refractions and to enhance the appearance of the 20M.

Special Features:

super boxcon binding posts
Design:
Magnetically shielded acoustic suspension, point source, first order, two-way acoustic suspension
Drivers: concentric 7.5 in cast frame TPX woofer, 1 inch soft dome tweeter
Crossover components: Perfect lay copper inductor, film foil capacitor, metal oxide resistor
Connectors: Supra Boxcon Bi-wire/Bi-amp, insulated five-way 24K gold plated binding posts for cables up to 7 AWG
Cabinet: Walnut veneered 3/4 inch braced anti-resonant MDF. The back of the cabinet is slanted 2 degrees, from the bottom to top of the back panel to eliminate standing waves in the cabinet.
Finish: Non-toxic, eco-friendly, water-based paint
Wiring: Silver plated copper to tweeter, multi-strand copper to woofer
Warranty: 10-year limited

Technical Data:
Dimensions:
14 X 9 X 10 (H X W X D)
Frequency Response:
54Hz-20kHz +/- 3 dB
Bandwidth (-10 dB): 38 Hz - 20 kHz
Sensitivity: 87 dB 1 watt/m
Drivers (each loudspeaker): (1) concentric 7.5 inch coaxial die-cast magnesium basket with TPX cone and fabric dome high frequency unit.
Rated Impedance:
8 ohms
Minimum Impedance: 6.5 Ohms
Recommended Power: 30-200 watts
Finishes: Natural walnut veneer on MDF with black grills.
Weight:
50 pounds per pair

Reviewer's Comments

"Small Footprint, Big Sound."

"The [NSMT Mastering Series] 20M loudspeakers are nicely designed, solidly built, and eminently musical sounding performers. They throw a very nice soundstage with good speed and detail and are capable of good bass performance."

"...the song that always does it for me is the classic, Cant Help Lovin Dat Man. Pianist Gene Harris performance is simply marvelous and I always want to stand and applaud every time his solo concludes.... The 20Ms ability to pull the listener into the performance is very important to this song."

"... very high-quality craftsmanship and tight tolerances in the construction."

"The tweeter actually showed incredible range, not getting hard or bright as the music became louder or more dynamic."

"The 20Ms ability to pull the listener into the performance is very important..."

"...this is a highly resolving , intimate-sounding speaker that will appeal to people who value high detail and clarity."
Stereo Times

"The 20M is a very different speaker ... because it uses a two-way coaxial driver from SEAS that looks like a single driver. It has the tweeter mounted inside the woofer, right where the dustcap would normally be. ...The idea in creating a driver like this is so that the speaker acts as a point source -- in other words, as close to a theoretical ideal of radiating sound from a single area.

"I found that both the NSMT Model 10S and Model 5 have remarkable ability to cast a stable soundstage with excellent width and depth. This speaker does this too, but it also manages to focus its image more finely, making its imaging performance among the best I've heard."

"I sat mesmerized by the precision with which the instrument was rendered."

"Compares favorably to the Waveform Mach MC, Mirage MRM-1, Revel Performa M20 and Merlin TSM-SE; 'if you're seeking all-out minimonitor performance, put the unique Masteringource 20M on your list."

"Fit and finish are excellent..." "Imaging is stellar. "
(Doug Schneider, Soundstagemagazine)
see also audioreview.com review of 20M

soundstage.com

20M Armada System

We have put together the 20M Armada System based on our knowledge and research of how these high performance components perform together and as a cost effective way to achieve or surpass the performance of some very expensive systems.

Here is what one of the best audio mastering engineers has to say about the 20M and two 15 EXP subwoofer Armada System:

"I purchased a complete 20M Armada system over a year ago which I use daily for audio mastering. This system has simply allowed me to get closer to creating a perfectly balanced master than I ever thought possible."
Kurt Lundvall, Lundvall Mastering

The MasterSouce 20M Armada System combines what is arguably the best imaging monitor with the NSMT15EXP, one of the best active subwoofers, and a pair of NSMT custom sand-fillable 27 inch Sandbags stands into a formidable system whose performance rivals systems at any cost.
The 20M Armada System delivers the laser sharp imaging and true musicality of the MastesSource 20M and bass with the speed and accuracy that only a high quality subwoofer like the EXP and 15EXP can deliver into a summary performance that is magical.
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The Mastering Series by NSMT Loudspeakers

P.O. Box 13396, Research Triangle Park, NC, USA 27709-3396
phone: 919-244-8777, fax: 206-339-9034
 

email: nsmt@nsmt-loudspeakers.com