What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Boston Acoustic A70

In a stereo system, the loudspeakers are the key components. Because they are devices that you hear, the system can never be better than they are, if your speakers are less than excellent, accuracy will suffer, and so can your enjoyment.
The Boston Acoustic A70 is a highly accurate reproducer of music. In addition to faithfully recreating the full audible range of music, the A70 can image more accurately than most speakers offered at any price.

An accurate stereo image increases realism.
When you listen to a stereo system, close your eyes, and find out whether your mind's eye can "see" where each instrument is located.
Boston Acoustic speakers are well-known for their ability to recreate an accurate stereo image that increases realism and enjoyment. The slim profile of the A70 not only makes it easier for you to place the speaker unobtrusively in a room; more important from a music lover's point of view, the dimensions of the cabinet minimize unwanted sounds that would ordinarily muddy the stereo picture. The result is a crisp focused image.
Another characteristic that contributes to good imaging is a tweeter that's matched to the woofer in terms of its radiation pattern. A limitation of ordinary tweetere is that they radiate sound forward in a tight pattern, like a flash-light radiates light. In contrast, all woofers radiate over a broad area,like a table lamp. The tweeter incorporated in the A70 radiates in a very broad pattern, making the woofer and tweeter a well-matched team. Hence, the stereo image is clear and distinct.

The best combination of range and accuracy inn its price class.
The A70 maintaining the correct proportion while reaching farther into the bass than any other speaker in its price class. The quality of the drivers is largely responsible. The tweeter is the same one we use in most expensive nodel. The woofer is a helfty 8-inch driver designed to providethe best combinationof deep bass and efficiency. It reproduces the lowest notes in music - notes that most listeners never heat, except in live performances.

A room-size sound from as little as 15 watts
With very little  power, the sound of two A70 speakers will fill an average size room to overfloving. The A70 performs well with a receiver or amplifier as low as 15 watts per channel. Its efficiency means you can spend less money on your receiver or amplifier, and get excellent performance.

Frequency Response:  40 - 25,000 Hz ±3 dB
Impedance:  6 ohms nominal
Sensitivity:  1 watt produces 90 dB at 1 meter
Low-Frequency :  200 mm (8") long throw woofer with focused gap magnet assembly for low distortion
High-Frequency :  25 mm (1") soft dome tweeter with ferrofluid cooling
Crossover Frequency:   2000 Hz
Recommended Amplifier Power:  15 to 75 watts per channel
Power Rating:  75 watts nominal;  150 watts peak
Internal Volume:  28 liters
Cabinet Finish:  wood grain vinyl finish over non-resonant particle board
Dimensiond (W x H x D):  356 x  610 x 203 mm (14" x 24" x 8")
Weight:  11,8 kg (26 lbs)

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