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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 2BX

2BX

If you want dynamic range expansion technology at a lower cost than the 3BX, then the 2BX is the model for you. Its somewhat simpler circuitry divides the frequencies into two bands instead of three. Music integrity of the bass and treble is maintained so that dynamic range of highly percussive music, either rock or classical, without causing the high and middle frequencies to track the low frequency dynamics of the music. The 2BX has two rows of LED's for monitoring expansion in each of its bands.

As with the 3BX, you can select the expansion you want (up to 50%) and adjust the transition level using the two controls provided for these purposes. Except for the most critical applications, the 2BX offers an ideal choice for increasing the dynamic range of your stereo system and your enjoyment of recorded music. Like the more expensive 3BX, the 2BX features PRE/POST recorder selection to allow you to expand either before or after the tape recorder connected to the 2BX. This tape loop replaces the one used on your receiver or preamp.

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: 6 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: 20 W

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

Weight (shipping): 8,3 lbs (3,8 kg)

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