Fostex owner manual Main features of NX-6A

NX-6A (Powered Near Field Studio Monitor)

Main features of NX-6A

• Woofer featuring the HR (Hyper Radial) diaphragm

The NX-6A employs the 160-mm woofer. It features the highly rigid HR (Hyper Radial) diaphragm, developed by using the latest diaphragm technology called "Radial pa- permaking technology". As a result, the NX-6A offers a rich low frequency sound with minimum distortion.

Furthermore, by using the "UDR tangential edge" for the woofer edge, it eliminates the unnecessary resonance and achieves pure and clear sound reproduction (see Figure 1).

Radial paper-forming technology

Using the radial paper-forming technology, speaker dia- phragms are made from compound materials (pulp, fiber, etc.) in a radial shape. This technology allows you to make diaphragms with the desired thickness and strength, which results in improving the speed and extent of a sound.

UDR (Up/Down Roll) tangential edge

A revolutionary technology is used for the NX-6A woofer edge. The edge is created by joining up-roll and down-roll at their tangential surfaces while utilizing FEM model analysis to determined the optimum bonding points. The UDR tan- gential edge is adopted to the edge of the NX-6A woofer.

•Tweeter featuring magnesium diaphragm

The 20-mm hard dome tweeter employs the magnesium dia- phragm. This tweeter produces natural and extended high frequencies, while eliminating a peculiar sound which most metallic tweeters may produce (see Figure 2).

• HP sound reflectors

The two HP sound reflectors are installed in the enclosure as shown in Figure 3. In the NX-6A enclosure, micron wool is also placed appropriately.

HR diaphragm

UDR tangential edge

Magnesium

diaphragm

• Bi-amplifier power

<Figure 1>

<Figure 2>

This configuration reflects the sound in the enclosure dif- fusely and creates the condition where stationary wave is decayed. The time alignment construction is adopted on the buffle surface of the enclosure, which allows to position each sound image accurately. The flush surface design elimi- nates sound blur.

HP sound reflector

<Figure 3>

The arrangement example of the HP sound reflectors (the cut model above shows the inside of the Fostex NF-1).

The NX-6A utilizes a powerful bi-amplifier design (60W for the woofer, 40W for the tweeter). Driving each speaker unit independently eliminates audio impurity caused by the electric interference between the units. The built-in power amplifier also provides functions for compensat- ing audio frequency characteristics to match the sonic character of a room, including the low frequency (around 55Hz range) equalizer and the tweeter level control. The power amplifier is equipped with both the balanced and unbalanced input connectors, allowing connection to any audio systems.

Amplifier

section

<Figure 4>

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