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

dbx Dynamic Range Expander

A dbx Dynamic Range Expander will significantly improve the sound quality of all your conventional records and tapes, and even FM broadcasts. First, it will increase the dynamic range of your music by as much as 50% to give you much of the excitement and impact of a live performance.

Second, a dbx Dynamic Range Expander can reduce annoying tape hiss and record surface noise by as much as 20 dB. Such a marked reduction in these distracting noises will dramatically increase your listening pleasure.

In short. you'll hear a sound quality you've never heard before from your entire music library. All because of the dramatic strides dbx has made with this remarkable technology.

A dbx Dynamic Range Expander is available for every system and every budget.

dbx 3BX Specifications

Expansion Ratio: Continuously adjustable from 1.0 to 1.5 (0 to 50% increase)linear in decibels

Dynamic Range: 100 dB (peak signal to weighted background noise)

Input Impedance: 50 kΩ

Input level: 300 mV nominal

Input level: 7 V RMS maximum

Output Impedance: 100 Ω (designed to drive 5 kΩ or greater)

Output Level: 7 V RMS (max. 20 Hz - 20 kHz)

Frequency Response: 20 Hz - 20 kHz ±0,5 dB at 1,0 expansion

Equivalent Input Noise: -85 dBV (unweighted, 20 kHz bandwidth, referenced to 1 V)

Total harmonic Distortion: 0,1%, typical at 1.0 expansion 20 Hz to 20 kHz

IM Distortion: 0,15% typical

Power Line Requirement: 117 V AC, 50 - 60 Hz

Power Line Consumption: 30 W

Dimensions (W x H x D): 17¾" x 3¾" x 10¼" (45,1 x 9,5 x 26,0 cm)

Weight (shipping): 12 lbs (5,45 kg)

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