DBX Recording Technology Series Model 224 noise reduction

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The DBX model 224 has two
channels of encode and two channels of decode processing, and is thus
capable of simultaneous recording and off-tape monitoring of a stereo
program. This DBX Type II system provides in excess of 30 dB broadband
tape noise reduction with a simultaneous 10 dB improvement in headroom
in the tape recording process.

The unit also may be used to decode special DBX encoded phonograph
discs. These discs, available through leading hi-fi and record dealers,
are up to 40 dB quieter than a conventional disc, and provide tremendous
musical dynamic range.

The 224's DBX disc decoding circuitry is not designed to reduce noise
on conventional phonograph records. Neither can the 224's DBX tape
noise reduction circuits reduce hiss on a tape which has already been
recorded without the corresponding DBX processing during the recording
process.

The unit is fully compatible with all other DBX Type II units,
including the 120 series and 140 series. The 224 is not compatible with
DBX Type I Professional equipment, and vice-versa. The incompatibility
is due to minor signal processing differences.

Alone, the DBX 224 will dramatically improve the quality of your live
tape recordings, and will preserve the quality when you are copying
previously recorded programs. When used properly, the tape noise
reduction makes an extremely valuable addition to your sound system and
to your listening enjoyment.

Specifications

Channels: 2

Input sensitivity: 300mV (6V max)

Output level: 5V (max)

Noise reduction system: dbx II

S/N improvement: 30-40dB (dbx II)

Dynamic range: 110dB

Frequency response: 30Hz to 20kHz

Total harmonic distortion: 0.5%

Dimensions: 437 x 440 x 179mm

Weight: 4.75lbs