RDL TX-8A 4 Ohm / 8 Ohm Speaker Level to Line Level Interface

Description
Warranty Information

Overview

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.

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

Specifications

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
Package Type:Cardboard Box
Package Dimensions:2 x 2 x 4 in.
Shipping Weight:0.41 lbs.

*Input level is the voltage that corresponds to a 4 Ohm or 8 Ohm amplifier output

RDL Three-Year Limited Warranty Installation of these products by the Purchaser shall constitute Purchaser’s acknowledgement and acceptance of the terms and conditions for sale and of this warranty, and shall constitute the Purchaser’s determination of the suitability of this product for the Purchaser’s intended application. Radio Design Labs, Inc., also referred to as RDL®, warrants to the Purchaser that products manufactured by RDL are free from defects in material and workmanship. This warranty applies to the period of three years from the date of shipment, except for component parts or products purchased from other sources and supplied by RDL. Such component parts or products bear only the warranty of the manufacturer thereof in effect at the time of shipment to the Purchaser. RDL will, without charge, and after written notice has been received and acknowledged by RDL, repair an RDL product if proved to be defective according to the usage of the trade, when such equipment is received by RDL at the location it designates with shipment costs prepaid by the Purchaser. RDL shall not be liable for any expense whether for repairs, replacements, material, service, or otherwise, incurred by the Purchaser or modifications made by the Purchaser to the product. No equipment shall be deemed defective if it shall fail to operate in a normal or proper manner due to exposure to excessive moisture in the atmosphere, excessive temperature extremes, improper environmental cleanliness, or any other environment not consistent with the principles of good engineering practice. In no event shall RDL have any liability for consequential damage or expense directly or indirectly arising from the use of the products, or any inability to use it either separately or in combination with other equipment or materials, or from any other cause, whether used in accordance with instructions or not. This warranty is void if equipment is altered in any way by other than RDL. RDL products are NOT intended for use in life support appliances, devices, or systems. Use of RDL products in such applications is done solely at the liability of the reseller/installer and/or end user. RDL reserves the right to change design parameters and specifications at any time without notice. The performance measurements reflect the products at the time of printing. This warranty is in lieu of all others, either expressed or implied. No representative is authorized to assume for RDL any other liability in connection with RDL products.