Audio Database
CDM7NT
Commentary

3-way tall boy type speaker system.

A 16.5 cm cone type woofer is installed in the low range. A paper Kevlar cone is used for the diaphragm of this unit. A large diameter mushroom type dust cap is a feature. A voice coil bobbin directly supports the back side of the dust cap to enable dynamic low range playback.

The mid-range is equipped with a 16.5 cm cone type mid-range.
The diaphragm of this unit uses a Kevlar cone to reduce the standing wave generated in the cone. In addition, the center cap is equipped with a bullet-shaped fading plug to improve the diffusivity in the middle and high regions, making the connection between drive units smoother.

A 2.5 cm metal dome type tweeter is installed in the high range.
This unit is a tube-loading tweeter used in the Nautilus 800 series, which effectively absorbs unwanted sound radiation from behind the diaphragm, enabling higher-quality high-frequency playback.

In the network section, the filters for woofer and tweeter are separated into separate boards to eliminate mutual interference between each circuit.
Air-core choke coils and polypropylene film capacitors are used for the circuit elements.

The enclosure uses a bass reflex system.
The CDM NT series enhances the exposure of the tweeter by exposure of the tweeter, enhances the sound spread and the sense of freedom, and improves the total system performance by aligning the time with the woofer.
The bass reflex port has a number of small depressions in the opening that act like the surface of a golf ball and, in combination with hydrodynamically studied shapes, improve air turbulence in the port.

The exterior has a natural veneer finish and comes in three variations : black ash, red cherry and cherry.

Model Rating
Method 3-Way, 3-Speaker, Bass Reflex System, Tall Boy Type
Unit Low pass : 16.5 cm cone type
Medium : 16.5 cm cone type
High pass : 2.5 cm dome type
Playback frequency band 30 Hz to 30 kHz -6dB
Playback frequency response 40 Hz to 25 kHz ± 3 dB
Nominal impedance 8 Ω (minimum 4.6 Ω)
Sensitivity 90dB/2.83V/1m
Crossover frequency 150 Hz, 4 kHz
Power Handling (Compatible Amplifier Output) 50W ~ 150W (at 8 Ω)
External dimensions Width 220x Height 950x Depth 290 mm
Weight 22.0kg