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TX-8A 4 Ohm / 8 Ohm Input Interface

  • Converts an Amplifier Output to Line Level
  • Bridges 4 or 8 Ohm Speaker Line
  • Adjustable for Wide Range of Input Power Voltage
  • Converts Amplified Levels from 0.5 W to 400 W
  • Excellent Low Frequency Response
  • Suitable to Feed a Subwoofer Amplifier Input
  • Detachable Terminal Block Connections
  • Balanced or Unbalanced Output
  • Superior Quality Audio Transformer
  • Bifilar Windings
  • Galvanic Isolation
  • Convenience of RDL TXs
  • TX-8A
  • Overview
  • Specifications
  • Related Products
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The TX-8A is the ideal choice in many applications requiring superior quality transformer coupling between the output of a 4 or 8 Ohm power amplifier and the input of an audio mixer or amplifier. A front-panel LEVEL control allows the output to be adjusted for -10 dBV or +4 dBu over a wide range of amplified power levels.

The TX-8A is a single-channel (mono) module featuring barrier block connections for the input and output. A high quality bifilar wound audio transformer couples the audio input to the audio output. The amplified input terminals are isolated from ground. The output ground terminal is connected to the TX-8A metal support structure.

The audio transformer provides galvanic isolation. The secondary may be wired balanced or unbalanced. The TX-8A delivers the wideband audio, low distortion, audio clarity and headroom common to professional equipment in a module suited to general-purpose audio installations.

The excellent low frequency response makes the TX-8A well suited to feed the line-level input of a subwoofer amplifier. In a stereo installation, two TX-8A module output may be mixed to feed a mono audio line and/or a subwoofer amplifier line input.

The TX-8A's compact size permits mounting in a variety of spaces and in various locations in equipment racks. The TX-8A may be mounted where needed, to rack sides or in an equipment rack (either the front or rear rack rails) using a variety of available RDL mounting options. Use the TX-8A individually, or combine it with other RDL products as part of a complete audio/video system.

Tech Tips

LINE-LEVEL FROM A 4 OHM OR 8 OHM SPEAKER LINE

Applications

AUDIO FOR DIGITAL SIGNAGE

AUDIO FOR DIGITAL SIGNAGE

Input Connector:
Barrier block
Minimum Input Level* (for +4 dBu Output):
8 W (8 Ohms); 16 W (4 Ohms)
Minimum Input Level* (for -10 dBV Output):
0.5 W (8 Ohms); 1 W (4 Ohms)
Maximum Input Level*:
400 W
Attenuation Range:
16 dB to 34 dB (input to output)
Output Connector:
Barrier block
Output Level:
-10 dBV unbalanced or +4 dBu balanced, adjustable (10 kOhm load)
Galvanic Isolation:
Bifilar wound audio transformer
Frequency Response:
20 Hz to 20 kHz (± 0.75 dB)
THD:
<0.1% (1 kHz); <1% (20 Hz to 20 kHz)
Power Requirement:
Passive
Dimensions:
Height: 3.0 in. 7.6 cm Width: 1.2 in. 3.0 cm Depth (case): 1.5 in. 3.8 cm Depth (with connector): 1.8 in. 4.6 cm
*Input level is the voltage that corresponds to a 4 Ohm or 8 Ohm amplifier output
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.41 lbs.
WEEE weight:
0.35 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
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Press Release:
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Declaration of Conformity:
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TX SERIES

TX Series modules are application-specific modules for the A/V and related industries. Many TX modules offer galvanic transformer isolation. Module functions include signal detection, switching, amplification, format conversion, line driving, mixing, distribution, twisted-pair sending/receiving and more. Each TX is a compact module engineered to provide higher performance and longer life than other industry products. TX modules are solid encapsulated hybrid circuits in durable industrial black plastic/steel or aluminum enclosures with clear bold white lettering for the jacks, terminal block connections, trimming controls and switches.

TX modules are constructed in two widths and heights. All TXs are the same length, have the same mounting hole configuration, and are compatible with all TX series mounting options. A complete range of mounting options is available for systems utilizing multiple TX modules. A single TX module may be mounted right where its function is needed, and are widely used in system designs with OEM or other RDL products. TX SERIES modules are designed and manufactured in the U.S.A.

TX-8A TX-8A