Aiwa’s Front 180” Speaker System provides excellent sound

balance for true stereo reproduction from any listening angle.

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.

EiiE!l Front 180” speaker system

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

I

Ma”in speaker

optimal stereo effect.

At point @, however, located off the center 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 unidirectional 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.

Cardioid speaker

(Right speaker)

I Figure 2 I Stereo effect with a conventional s~eaker

I1

system

Main unit

— Right speaker

@

Center listening point:

Balanced

sound heard from left

 

 

and right

speakers

(j)

Off-center listening point:

Right speaker sounds louder than

 

 

left speaker

 

+: Sound pressure level

 

 

m:Stereo listening area

w

Stereo effect with Aiwa Front 180”

speaker system

 

True stereo sound can be heard at point@ as well as point @.

Main unit

+: Sound pressure level

m:Stereo listening area of new speakers

ENGLISH I 9

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Aiwa XR-M70 manual EiiE!l Front 180 speaker system, Stereo effect with Aiwa Front, Speaker system
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XR-M70 specifications

The Aiwa XR-M70 is a compact yet powerful mini audio system that was a staple in home entertainment for music lovers in the 1990s. Renowned for its versatile functionality, robust sound, and user-friendly design, the XR-M70 encapsulates the essence of consumer electronics from that era.

One of the standout features of the Aiwa XR-M70 is its dual cassette deck, which allows users to both play and record audio cassettes. This functionality was particularly appealing during a time when cassette tapes were a dominant format for music. The recorder supports high-speed dubbing, enabling users to create copies of their favorite tapes quickly, as well as normal and micro speeds for more sensitive recordings. Additionally, the auto-reverse feature lets listeners indulge in uninterrupted playback.

The XR-M70 boasts a powerful built-in amplifier, delivering clear and dynamic sound output. With a total power output of around 40 watts, it can fill a medium-sized room with quality audio, making it excellent for parties or casual listening. The system is equipped with a six-band graphic equalizer, which allows users to fine-tune their listening experience according to their music genre or personal taste. This level of customization enhances the overall audio performance.

Another key characteristic of this model is its CD player, which accommodates various disc formats, including CD-R and CD-RW. The anti-shock technology integrated into the CD mechanism ensures smooth playback, even while the unit is in motion. This feature was particularly advantageous for audiophiles who appreciated the fidelity of CDs but wanted the peace of mind that comes with modern technology.

The Aiwa XR-M70 also includes FM/AM radio capabilities, complete with a digital tuner for easy station selection. Its presets allow listeners to save their favorite channels, offering quick access to their desired radio stations without the hassle of manual tuning.

Aesthetically, the Aiwa XR-M70 showcases a sleek, modern design characterized by a user-friendly interface. The multi-function remote control enhances usability, allowing users to manage playback from a distance.

In summary, the Aiwa XR-M70 stands out in the world of mini audio systems for its combination of classic cassette functionality, reliable CD playback, customizable audio settings, and user-friendly design. It serves as a nostalgic reminder of a time when music was enjoyed through tangible media, while still offering the features that made it a favorite among consumers.
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