Symetrix 303 Bidirectional Balanced Unbalanced Audio Level Converter Matchbox [Refurbished]
( 282088829578) )
Symetrix 303 Bidirectional Pro Balanced to/from Consumer Unbalanced Audio Level Matchbox
Used, Good Condition • With Power Supply (115V AC Input only)
Photos show the actual item for sale
A Stereo Level Matching Amplifier that accepts balanced or unbalanced inputs and converts them to balanced or unbalanced outputs. Use the 303 to interface a consumer DAT, cassette recorder or computer sound card to a professional recording console or to other +4dBu nominal level equipment.
- Simple, affordable conversion of consumer audio to pro audio without loss of information.
- Stereo XLR and RCA input and output jacks.
- External power supply ensures low noise operation
Computer audio recording systems and high quality consumer audio equipment provide their users with efficient and affordable systems.
Unfortunately, they also create a few audio challenges of their own. Joining consumer audio gear with professional audio gear in a signal path requires connecting equipment designed to operate at different signal levels. A direct wire connection between them should be avoided.
The Symetrix 303 Interface Amplifier creates a proper interface between consumer and professional audio gear. This tool provides bi-directional level-matching and balanced/unbalanced conversion between professional (+4 dBu nominal level, balanced) audio equipment and consumer (-10 dBV nominal level, unbalanced) audio components.
The 303 has two completely separate channels of conversion and level matching in each direction (from -10dBV to +4dBu, and from +4dBu to -10dBV). This means that, in each direction, the 303 may be used as a stereo interface amplifier, or as two mono interface amplifiers. All inputs and outputs may be used at the same time, allowing up to four channels of simultaneous levelmatching and conversion.
Level-matching permits the connection of consumer and pro audio gear, while allowing both types of units to operate at optimal performance levels. A typical use of the 303 would be to connect a DAT, cassette deck or computer sound card (all of which generally run at -10dBV nominal level), to a professional audio mixer (+4dBu nominal level) or vice versa.
The Symetrix 303 also provides conversion from unbalanced, -10dBV outputs to balanced, +4dBu inputs and conversion from balanced, +4dBu outputs to unbalanced, -10dBV inputs. This conversion can also be used to minimize noise and hum.
A note about setup: Unbalanced cables are much more susceptible to induced noise and hum than balanced cables (when used with balanced inputs and outputs), and the longer an unbalanced cable is, the more noise and hum you are likely to pick up. If you keep the unbalanced cables between the consumer equipment and the 303 short (under 10 feet), and use the balanced lines between the professional gear and the 303 for any long cable runs, you are far less likely to pick up noise and hum, and you take advantage of the common mode rejection of the balanced input.
Low noise operation is also ensured by the Symetrix 303's external power supply, which eliminates the possibility of power supply noise developing in the 303's circuitry.