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





Aiwa DX-1500

Hassle-free Playback

Just drop in a CD and press the Play button. The front-loading drawer closes automatically and playback begins.

16-track programmable Playback

Up to 16 selections (including repeats) can be easily programmed into the DX-1500 for playback in any order you like.

Advanced 3-beam laser pickup

The DX-1500's advanced 3-beam laser pickup has been designed for positive and precise tracking of the "pit lane" encoded on Compact Discs. The main laser beam is guided by two sub-beams which track on either side, using highly responsive electronic servo circuitry to keep the main laser on course. The pickup assembly is driven by a linear motor for extremaly fast access time.

High performance LSI's Improve Precision and Stability

The servo control, digital, and D/A sections have been engineered onto specially designed LSI's to simplify signal paths and improve the precision and reliability of signal transmission for faithful reproduction of CD. Along with specially chosen high-quality electronic components, they have been integrated onto a single circuit board which is insulated from the main chassis to avoid electromagnetic interference which can degrade sound quality.

Plus:

Forward and back skip with a single touch

3-way music repeat; entire disc/one track/programmed selections

Manual cue and review (with sound); fast cueing (without sound) in both directions possible in the pause mode

Headphone jack with volume control

Specifications

Frequency response: 2 Hz to 20 kHz (± 1 dB)

Dynamic range: more than 90 dB

Signal-to-noise ratio: more than 90 dB (at 1 kHz, 0 dB)

Channel separation: more than 90 dB (at 1 kHz , 0 dB)

THD: less than 0,004% (at 1kHz)

Wow and flutter: Quartz crystal oscillator precision

Sampling frequency: 44,1 kHz

Quantization: 16 bits linear/channel

Error correction: Cross Interleave Reed Solomon Code (CIRC)

Modulation: Eight to Fourteen Modulation (EFM)

Optical stylus: GaAIAs semiconductor laser ( λ = 780 mm)

Output terminal: Pin jack

Line out: max. output level: 2 V (50 kΩ)

Load impedance: 10 kΩ or more

Headphone out: 12 mW (32 Ω)

Power source: 120/ 220/ 240 V, 50/60 Hz

Dimensions (W x H x D): 330 x 74 x 306 mm

Weight: 3,4 kg

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