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Aiwa’s Front 180° Speaker System provides

excellent sound balance for true stereo

reproduction from any listening ang”le.

In stereo sound reproductions systems up to now, the listening area where the optimal stereo effect is obtained has been extremely narrow. This is due to the following reasons.

As shown in Figure 2, a conventional stereo system has speakers on the front panel of the speaker system, pointing forward. It is designed for listening in a location directly in front of the front speaker panel.

In this case, as shown in Figure 2, a listener at point@, located on the center line between the right and left speakers, hears the voice of a singer coming from the center front. Instrumental sounds are distributed evenly between both speakers for an optimal stereo effect.

At point @), however, located off the center c line between the speakers, the distance from the left speaker to the listener is greater than the distance from the right speaker. Sound from the left speaker appears to be faint, and sound from the right speaker appears to be loud. Sound is perceived as coming from the speaker with the greater volume, so that the singer’s voice appears to shift toward the right speaker. The normally balanced instrumental sounds also appear to come primarily from the

right speaker.

Moreover, since the directivity of speakers

increases with higher frequencies, high- frequency sounds from the left speaker become even harder to hear, increasing the impression of imbalance. For these reasons, the listening area which provides even sound balance and the optimal stereo effect is limited to the narrow

area shown in Figure 2-@. .

To solve this problem, Aiwa has developed uni- directional speakers for this new speaker system featuring cardioid directivity for frequencies of 1 kHz or less. These speakers are pointed inward at angles of 45° (see Figure 1) ..Driven by left and right stereo sound signals, these speakers act to increase the width of the optimum listening area (see Figure 3) . Because of their cardioid directivity and the 45° angle of their main speaker axis, they provide enhanced sound reproduction at point@ in Figure 3. The left speaker is pointed toward the listener, and the right speaker is pointed away from the listener, so that the directivity of the speakers compensates for the differences in perceived volume caused by the differences in distance to the listener. Therefore, the sound of a singer’s voice is perceived as coming from a

point midway between the speakers, and instrumental sounds are distributed evenly.

EEm Front 180° speaker system

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DizEzl Stereo effect with a conventional speaker svstem

 

Main unit

Left

Right

speaker

speaker

@ Center listening point: Balanced sound heard from left and right speakers

@Off-center listening point: Right speaker sounds louder than left speaker

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Aiwa Front 180” speaker

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True stereo sound can beheard atpoint @aswell aspoint

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EPIGLISH26

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Aiwa CX-NA92 manual ?s%492 Cw@

CX-NA92 specifications

The Aiwa CX-NA92 is a remarkable mini hi-fi system that emerged in the early 1990s, appealing to audiophiles and casual listeners alike with its impressive features and innovative technology. This compact yet powerful unit showcases Aiwa's commitment to delivering high-quality sound in a stylish package.

At the heart of the CX-NA92 is its dual cassette deck, allowing users to play and record audio from cassette tapes. This feature, coupled with a simple interface for dubbing and playback, made it a popular choice during the time when cassette tapes were still widely used. The system also supports normal, chrome, and metal tapes, providing flexibility and excellent playback quality across various tape formats.

The system boasts a CD player that supports standard audio CDs, offering crystal-clear sound reproduction and a user-friendly interface for easy navigation through tracks. A notable feature is the CD synchro recording capability, allowing users to create mixed tapes directly from CDs. The inclusion of an AM/FM tuner further enhances its versatility, enabling users to enjoy a wide range of radio stations.

Sound quality is a significant highlight of the Aiwa CX-NA92. It is equipped with stereo speakers that deliver robust bass and crisp highs. The system's built-in equalizer allows users to tailor their listening experience, adjusting the sound according to personal preferences or specific genres. The powerful amplifier ensures that sound clarity is maintained even at higher volumes, making it suitable for both quiet evenings and lively gatherings.

Connectivity options include multiple audio inputs, allowing users to connect various external devices, such as turntables or additional sound sources. The design of the CX-NA92 prioritizes aesthetics as well, featuring a sleek, modern look that complements any home décor.

Another notable characteristic is its compact size, which makes it easy to fit into smaller spaces without compromising audio quality. Its user-friendly controls and remote compatibility enhance convenience, making it accessible for users of all ages.

Overall, the Aiwa CX-NA92 stands as a testament to the era of mini hi-fi systems, blending classic audio technologies with user-centric features. Its combination of a cassette deck, CD player, radio tuner, and impressive sound quality continues to endear it to collectors and retro audio enthusiasts today. Whether reminiscing about the past or simply enjoying the warm sound of analog, the CX-NA92 remains a cherished piece of audio equipment.