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system that achieves many of the advantages of a fully active 3-way system without the need of additional amplifiers.
However, for those who insist of a fully active format an optional mid/tweeter active crossover circuit board is available.
Additionally, for those who would chose a digital crossover format, configuration files for the miniDSP 2x8 digital crossover
are also available for both the hybrid and fully active versions.
The main panel of the NaO II RS consists of two18 cm Scan Speak 8545 drivers in an MTM format with a 1 inch, fabric
dome Seas T25CF-002 front tweeter. A rear tweeter (Seas 27TDFC) is included for improved spectral balance at higher
frequencies.
The NaO II RS system employs a reconfigured, damped U-frame woofer system, using two Peerless 10" XXLS 835016
aluminum cone woofers for each channel. The custom designed active crossover/eqaulization unit adds flexibility in tuning
the system to your tastes and to your room.
The NaO II Rs is 53" tall, 12 1/2" wide and 19" deep at the base.
However, for those who insist of a fully active format an optional mid/tweeter active crossover circuit board is available.
Additionally, for those who would chose a digital crossover format, configuration files for the miniDSP 2x8 digital crossover
are also available for both the hybrid and fully active versions.
The main panel of the NaO II RS consists of two18 cm Scan Speak 8545 drivers in an MTM format with a 1 inch, fabric
dome Seas T25CF-002 front tweeter. A rear tweeter (Seas 27TDFC) is included for improved spectral balance at higher
frequencies.
The NaO II RS system employs a reconfigured, damped U-frame woofer system, using two Peerless 10" XXLS 835016
aluminum cone woofers for each channel. The custom designed active crossover/eqaulization unit adds flexibility in tuning
the system to your tastes and to your room.
The NaO II Rs is 53" tall, 12 1/2" wide and 19" deep at the base.
Não em uma caixa.
"Not in a box"
"Not in a box"
The NaO Note was the forerunner te Note II RS DIY Dipole
loudspeakers. Introduced in the fall of 2010 the NaO Note
represented the next step forward in the design of dipole speakers
using conventional dynamic drivers. The design objectives of the
NaO Note were similar to those of the NaO II but they were addressed
loudspeakers. Introduced in the fall of 2010 the NaO Note
represented the next step forward in the design of dipole speakers
using conventional dynamic drivers. The design objectives of the
NaO Note were similar to those of the NaO II but they were addressed
from a different design approach. The design differences were directed at achieving
constant directivity above the sparsely populated room mode frequency range (above
approximately 100 Hz) in the form of more uniform horizontal polar response in the front
hemisphere, and retention of the dipole pattern to significantly higher frequency than
previously seen in other dipole designs. The picture to the right shows the NaO Note
speaker system. The driver complement for the Note panel consists of two Seas
ER18RNX mid woofers, a Scan Speak Discovery 10F4424 upper midrange and a B&G
Neo 3 PDR tweeter. The Neo 3 tweeter operates in dipole mode, without a rear
chamber, and is mounted in a simple, front and rear symmetrical wave guide eliminating
the need for s separate rear tweeter. The panel is a 3.5 way design with the lower ER18
being used only boost the output below 300 Hz. The woofer system uses two Peerless
XXLS 835016 woofers in a U-frame format.
Many of the features which made the NaO II a speaker of the highest quality are were in
the NaO Note. The Note remained a modular design consisting of 4 components:
constant directivity above the sparsely populated room mode frequency range (above
approximately 100 Hz) in the form of more uniform horizontal polar response in the front
hemisphere, and retention of the dipole pattern to significantly higher frequency than
previously seen in other dipole designs. The picture to the right shows the NaO Note
speaker system. The driver complement for the Note panel consists of two Seas
ER18RNX mid woofers, a Scan Speak Discovery 10F4424 upper midrange and a B&G
Neo 3 PDR tweeter. The Neo 3 tweeter operates in dipole mode, without a rear
chamber, and is mounted in a simple, front and rear symmetrical wave guide eliminating
the need for s separate rear tweeter. The panel is a 3.5 way design with the lower ER18
being used only boost the output below 300 Hz. The woofer system uses two Peerless
XXLS 835016 woofers in a U-frame format.
Many of the features which made the NaO II a speaker of the highest quality are were in
the NaO Note. The Note remained a modular design consisting of 4 components:
1) A midrange/tweeter panel;
2) A unique U-frame woofer system;
3) A passive panel crossover;
4) An Active Woofer/Panel Crossover Equalization Unit (ACEU).
The NaO Note followed the active/passive hybrid design philosophy resulting in an efficient, biamplified
system. A passive crossover was used to combine the drivers on the main panel without the use of resistive
attenuation. The crossover between the woofer system and the panel was controlled by an active crossover
which also appliesd the required active equalization to the woofer and the panel so as to achieve the desired
acoustic targets.
While the NaO Note was designed as a complete system with U-frame woofer, it was possible to build the
system using alternate woofer formats. For those who feel a true dipole system should use a dipole woofer as
well, all NaO Note plan sets included modifications for a fully designed and tested dipole woofer using two
Peerless XXLS 835016 woofers per speaker mounted in opposition. The dipole woofer has the advantage of
cancellation of even order distortion, and may couple to the room modes differently than the U-frame format.
The disadvantage is that the maximum sound pressure at the lowest frequencies is reduced by between 4 to 6
dB compared to the U-frame. For those on a tighter budget sealed and ported box options using only a single
woofer per speaker was also provided. The sealed box system provides maximum sound pressure
capabilities similar to the dual woofer U-frame option and was designed to have the same alignment. The
ported option provided even greater maximum sound pressure capability but with the potential draw backs of
any ported design. Each woofer system was carefully designed and tested to mate properly to the NaO Note
main panel.
As should be evident, the NaO Note represented an advance in the design of DIY dipole speaker systems.
These advances were carried forward into the NaO Note II RS.
Please use the menu to the left and above to explore further details of the NaO Note.
2) A unique U-frame woofer system;
3) A passive panel crossover;
4) An Active Woofer/Panel Crossover Equalization Unit (ACEU).
The NaO Note followed the active/passive hybrid design philosophy resulting in an efficient, biamplified
system. A passive crossover was used to combine the drivers on the main panel without the use of resistive
attenuation. The crossover between the woofer system and the panel was controlled by an active crossover
which also appliesd the required active equalization to the woofer and the panel so as to achieve the desired
acoustic targets.
While the NaO Note was designed as a complete system with U-frame woofer, it was possible to build the
system using alternate woofer formats. For those who feel a true dipole system should use a dipole woofer as
well, all NaO Note plan sets included modifications for a fully designed and tested dipole woofer using two
Peerless XXLS 835016 woofers per speaker mounted in opposition. The dipole woofer has the advantage of
cancellation of even order distortion, and may couple to the room modes differently than the U-frame format.
The disadvantage is that the maximum sound pressure at the lowest frequencies is reduced by between 4 to 6
dB compared to the U-frame. For those on a tighter budget sealed and ported box options using only a single
woofer per speaker was also provided. The sealed box system provides maximum sound pressure
capabilities similar to the dual woofer U-frame option and was designed to have the same alignment. The
ported option provided even greater maximum sound pressure capability but with the potential draw backs of
any ported design. Each woofer system was carefully designed and tested to mate properly to the NaO Note
main panel.
As should be evident, the NaO Note represented an advance in the design of DIY dipole speaker systems.
These advances were carried forward into the NaO Note II RS.
Please use the menu to the left and above to explore further details of the NaO Note.
The NaO II RS:
The NaO II Rs is a refinement of the NaO II which had its roots in the
original NaO prototype loudspeaker introduced in 2003. The design
was refined to the NaO II in 2005 and now to the NaO II RS in 2012.
A complete plan set with required PCB is available for $150. The
system is of a modular format consisting of four components:
1) A midrange/tweeter panel;
2) A unique U-frame woofer system;
3) A passive midrange/tweeter crossover;
4) An Active Woofer/Panel Crossover Equalization Unit (ACEU).
The NaO II RS retains the hybrid active/passive design philosophy
in a cost effective, bi-amplified format. A redesigned and improved
passive crossover is used between the midrange and the tweeter.
The ACEU controls the woofer/panel crossover and required dipole
equalization for both the woofer and the midrange. The result is a
The NaO II Rs is a refinement of the NaO II which had its roots in the
original NaO prototype loudspeaker introduced in 2003. The design
was refined to the NaO II in 2005 and now to the NaO II RS in 2012.
A complete plan set with required PCB is available for $150. The
system is of a modular format consisting of four components:
1) A midrange/tweeter panel;
2) A unique U-frame woofer system;
3) A passive midrange/tweeter crossover;
4) An Active Woofer/Panel Crossover Equalization Unit (ACEU).
The NaO II RS retains the hybrid active/passive design philosophy
in a cost effective, bi-amplified format. A redesigned and improved
passive crossover is used between the midrange and the tweeter.
The ACEU controls the woofer/panel crossover and required dipole
equalization for both the woofer and the midrange. The result is a
The NaO Mini:
The NaO Mini, introduced in 2006, was a very popular introductory level dipole design. It was a 2-way hybrid
design based on the Peerless Exclusive 7" midwoofer and Seas 27TDFC tweeter in an MTM format
combined with a conventional sealed box subwoofer based on the Peerless XXLS woofer. The Mini MTM
panels can be used as a stand alone 2-way system at moderate listening levels with limited bass response.
The Peerless XXLS woofer has since been discontinued. Plans for the NaO Mini are no longer available.
NaO systems are available in several optional formats from complete plans, including the required printed
circuit board for the active circuits, or with miniDSP crossover configuration files. An optional active
midrange/tweeter crossover module is also available for the NaO II making it a fully active system requiring a
minimum of 3 channels of amplification per speaker. To learn more about NaO speakers please browse
using the menu to the left or contact Music and Design with your questions or to arrange an audition.
The NaO Mini, introduced in 2006, was a very popular introductory level dipole design. It was a 2-way hybrid
design based on the Peerless Exclusive 7" midwoofer and Seas 27TDFC tweeter in an MTM format
combined with a conventional sealed box subwoofer based on the Peerless XXLS woofer. The Mini MTM
panels can be used as a stand alone 2-way system at moderate listening levels with limited bass response.
The Peerless XXLS woofer has since been discontinued. Plans for the NaO Mini are no longer available.
NaO systems are available in several optional formats from complete plans, including the required printed
circuit board for the active circuits, or with miniDSP crossover configuration files. An optional active
midrange/tweeter crossover module is also available for the NaO II making it a fully active system requiring a
minimum of 3 channels of amplification per speaker. To learn more about NaO speakers please browse
using the menu to the left or contact Music and Design with your questions or to arrange an audition.
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The NaO Note II RS:
The Note II RS is the latest offering from Music and Design. Based in the
original NaO Note (below) the Note II RS further improves the polar
response at higher frequencies by substituting front and rear 3/4" dome
tweeters for the Neo 3 used in the original Note. The dual 18 cm lower
midrange drivers have also been eliminated in favor of a single 22 cm
unit. The woofer system has also been switched to a dipole using dual
10" Peerless SLS woofers making the Note II RS the first full range
dipole speaker offered by Music and Design. All of these changes make
the Note II RS the most affordable speaker design offered by Music and
Design. The prototype was introduced in October of 2012 and was
presented at DIY New England in December where it received very
favorable reviews: "This is John K's best speaker yet. Proof positive
that if you take moderately priced drivers but use them CORRECTLY
you can do great things...These were my favorite speaker overall from
the day." This is certainly high phrase considering that they were in the
company of the highly respected Linkwitz Orion.
In contrast to other NaO Speakers, the NaO Note II RS is available only
as a 4-way active system using the miniDSP 2x8 (or 4x10 HD) digital
crossover. The NaO Note II RS is 46" tall, 12 1/5" wide and 19" deep at
the floor, 1 3/4" deep at the top.
The Note II RS is the latest offering from Music and Design. Based in the
original NaO Note (below) the Note II RS further improves the polar
response at higher frequencies by substituting front and rear 3/4" dome
tweeters for the Neo 3 used in the original Note. The dual 18 cm lower
midrange drivers have also been eliminated in favor of a single 22 cm
unit. The woofer system has also been switched to a dipole using dual
10" Peerless SLS woofers making the Note II RS the first full range
dipole speaker offered by Music and Design. All of these changes make
the Note II RS the most affordable speaker design offered by Music and
Design. The prototype was introduced in October of 2012 and was
presented at DIY New England in December where it received very
favorable reviews: "This is John K's best speaker yet. Proof positive
that if you take moderately priced drivers but use them CORRECTLY
you can do great things...These were my favorite speaker overall from
the day." This is certainly high phrase considering that they were in the
company of the highly respected Linkwitz Orion.
In contrast to other NaO Speakers, the NaO Note II RS is available only
as a 4-way active system using the miniDSP 2x8 (or 4x10 HD) digital
crossover. The NaO Note II RS is 46" tall, 12 1/5" wide and 19" deep at
the floor, 1 3/4" deep at the top.
Similar to all NaO speakers, the Note II RS is modular and consists of:
1) The midrange/tweeter panel;
2) The dipole woofer system;
3) The miniDSP active crossover.
The driver set consists of front and rear Vifa (or Peerless Gold) OX20SC00 3/4" dome tweeters, ScanSpeak Discovery
10F4424 and 22W8434 upper and lower midrange drivers, and dual Peerless 10" SLS 830668 woofers. The Peerless 10"
XXLS 835016 aluminum cone woofers may be substituted at a substantial increase in cost. Plans come complete with the
miniDSP configuration files for which ever woofer is used. It shouldbe possible to build the speaker as a DIY project for
approximately $1300, less amplifiers when using the SLS woofers.
1) The midrange/tweeter panel;
2) The dipole woofer system;
3) The miniDSP active crossover.
The driver set consists of front and rear Vifa (or Peerless Gold) OX20SC00 3/4" dome tweeters, ScanSpeak Discovery
10F4424 and 22W8434 upper and lower midrange drivers, and dual Peerless 10" SLS 830668 woofers. The Peerless 10"
XXLS 835016 aluminum cone woofers may be substituted at a substantial increase in cost. Plans come complete with the
miniDSP configuration files for which ever woofer is used. It shouldbe possible to build the speaker as a DIY project for
approximately $1300, less amplifiers when using the SLS woofers.
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