Audio Database
Nautilus 803

Nautilus series of Middle Class toll-boy speaker systems.

Two 18 cm cone type woofers are installed in the lower range.
Paper / Kevlar composite cone is used for the diaphragm.

The mid-range features an edgeless 15 cm cone mid-range.
The diaphragm uses a Kevlar cone the diaphragm. The unique FST improves the response time of the cone and the completeness of sound transmission to maximize the effect of Kevlar. The frame is designed to minimize the impedance to airflow from the rear of the driver.

A 2.5 cm metal dome type tweeter is installed in the high range.

The enclosure has a curved cabinet structure and uses a bass reflex system.
In addition, a matrix structure is adopted inside, and the cabinet is reinforced from the inside by a three dimensional honeycomb structure to suppress the coloring.
There are 3 variations of the finish of the exterior, black ash, red cherry and cherry.
A speaker terminal made by WBT is used for the speaker terminal.

Model Rating
Method 3-Way, 4-Speaker, Bass Reflex System, Tall Boy Type
Unit For low band : 18 cm cone x2
For Medium Range : 15 cm cone type
For high-pass : 2.5 cm dome type
Frequency characteristic 28 hz to 30 khz -6dB
35 Hz to 22 kHz -3dB
Frequency response 42 Hz to 20 kHz ± 2 dB
Output sound pressure level 90dB/2.83V/m
Nominal impedance 8 Ω
Crossover frequency 350 Hz, 4 kHz
Recommended power amplifier output 50W ~ 250W (at 8 Ω)
External dimensions Width 285x Height 1,064x Depth 431 mm
Weight 30kg