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Drivers
The outmost care at choosing the drivers is the key to successfully transforming the theoretical advantages of the horn technology into an outstanding High End speaker.
The M1-N is a 130mm (5 in) midrange driver with a 75mm (3 in) dome especially developed for the NANO and optimised for a large, linear movement. This way the M1-N has a very low cut-off frequency with seamingless and crossover-less integration to the subwoofer. The design of the dome ensures a phase-neutral radiation of the sound waves into the midrange horn SH5002 and wide bandwidth of the extended midrange down to 290 Hz. The Avantgarde Acoustic proprietary CDC system features a controlled roll-off at 3,000 Hz, and allows us to completely eliminate all passive crossover components in the signal path. This way the M1-N gets the pure and non-distorted full-range signal directly from the amplifier!
H1-N is a high-frequency tweeter providing an extremely wide frequency range reaching down to 1 kHz. Based upon the same design principle of the nearly "legendary" TRIO tweeter H3, the H1-N offers very low distortion and excellent transient characteristics.
The over-dimensioned magnet structure of the tweeter, weighing 3 kg (6.5 lb), results in a sound pressure level of 104 dB (1Watt/1m) at very high power rating.
More details and information about the principles of horn and driver design can be found under THEORY.
Subwoofer
The NANO is supplied with the active subwoofer SUB225-N, which is driven by two powerful 25 cm (10 inch) long-excursion drivers.
The integrated active electronics consists of a powerful 250 watt amplifier and an active frequency crossover. The active crossover allows the adjustment of a number of parameters thus ensuring a very easy and fast installation of the system even in acoustically critical situations.
The SUB225-N is an actively controlled subwoofer. A real-time feedback loop not only eliminates deviations of the amp itself, but also the deviations of the drivers. As result the SUB225-N achieves an astonishingly flat frequency response down to 18 Hz!
The SUB225-N is driven via high power WBT speaker terminals for direct connection to integrated amps, power amplifiers or receivers or alternatively via XLR terminals. The signal take-off is not only at high impedance, but is also balanced and transformer coupled. This floats the subwoofer ground, avoiding hum loops and eases connection to balanced and bridged amplifier designs.
The enclosure of the SUB225-N is constructed from 1.2" MDF (30mm). Designed with a centrally located reinforcing stabilizer, the box construction is very rigid, avoiding resonances.
Further technical details of the SUB225 can be downloaded in the SERVICE section of this website.
Mechanical construction (Patent pending)
The midrange horn is mounted into circular housing tubes, which is tightened to the three pillar steel-tube frame by chrome screws. The tweeter, mounted to an aluminium disc, is located in a sealed compartment at the head of the subwoofer enclosure.
As the entire loudspeaker system is placed on three self-aligning feet, the sub-woofer is freely-suspended above the ground. This free floating design enables an ideal decoupling from the floor boundary. If necessary the subwoofer can be further de-coupled by spikes.
Finishes
The standard version of the NANO comes with various metallic lacquer finishes for the horns. The circular housing tubes and the three pillar steel tube frame is powder coated in elegant black. The rear-covers and the subwoofer enclosure are coated in high quality NEXTEL finish. Special designs are available upon request.
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