RDL STA1M Data Sheet

STICK-ON® SERIES

Model STA-1M
Audio Line Amplifier

ANYWHERE YOU NEED...

• A Single-Channel Audio Line Amplifier

• Balanced or Unbalanced Inputs and Outputs

• To Bridge a Line to Avoid Loading

• High/Low or Low/High Impedance Conversion

• Instrumentation Input to Isolate Ground Loops

• To Precisely Match Audio Levels

• True DC Amplification

You Need The STA-1M!

APPLICATION: The STA-1M is part of a group of products in the STICK-ON series from Radio Design
Labs. The durable adhesives provided with the STA-1M permit permanent or removable mounting. The
STA-1M gives you the advantages of balanced/unbalanced configuration conversion, impedance
conversion, level boost or cut, with a big plus... you can put it where you need it!

The STA-1M allows bridging of any audio line, adjusting the gain, and driving a balanced or unbalanced
line. The circuit design allows the input to accept either balanced or unbalanced signals, of either high or
low impedance. This is an instrumentation type input stage that will amplify the differential input,
regardless of ground reference. This offers increased possibilities for eliminating ground loops in audio
systems.

The output is capable of driving into either high or low impedance loads. And the output may be
connected either balanced or unbalanced. The STA-1M features superior circuitry that produces the
unsurpassed pure clarity for which RDL products are known! Some features are:

• Functions as an electronic transformer with isolation and gain (or loss).

• Impeccable audio quality.

• Ultra-low distortion

• Ultra-low noise.

• Output level adjustable for all ranges of conversion between –10 dBV and +4 dBu signals.

• Ample headroom at operating level.

• Full operation in either high or low impedance circuits.

• Outputs short-circuit protected.

• Positive connections via barrier block - no audio connectors to wire.

Whether you need to simply boost a line level, convert between balanced and unbalanced lines or convert
between high and low impedances, the STA-1M is today’s simple, no-compromise, cost-effective solution!
Use the STA-1M combined with other RDL RACK-UP®, STICK-ON, TX™, or FLAT-PAK™ series products
as part of a complete audio/video system.

RDL •• P.O. Box 1286 •• Carpinteria, CA., USA 93014 •• [phone] •• FAX [phone] •• http://www.rdlnet.com

STICK-ON® SERIES

Model STA-1M
Audio Line Amplifier

Installation/Operation

EN55103-1 E1-E5; EN55103-2 E1-E4

Typical Performance reflects product at publication time
exclusive of EMC data, if any, supplied with product.
Specifications are subject to change without notice.

TYPICAL PERFORMANCE

Input: 10 kΩ balanced or unbalanced bridge
Outputs (2): #1: 200 Ω balanced (to drive low or

#2: 200 Ω unbalanced (to drive
unbalanced lines.)
THD+N: <0.050% (Typical 0.020% @ 1 kHz)
Frequency Response: 10 Hz to 20 kHz (+/- 0.25 dB)
Noise below +4dBu: <75 dB
CMRR: >50 dB at full gain (100 Hz).

891-0004I

high impedance balanced lines)

Radio Design Labs Technical Support Centers

U.S.A. [phone], [phone]; Fax: [phone]

Europe [NH Amsterdam] (++31) 20-6238 983; Fax: (++31) 20-6225-287

Gain:
Balanced output: -7 dB to +14 dB
Unbalanced output: -14 dB to +7 dB
Headroom: >18 dB (above +4dBu)
Supply Input: 24 to 33 Vdc @ 50 mA Floating (RDL

supply), +/- 12 to +/- 16.5 Vdc
Dimensions: Height: 1.55 in. 3.94 cm
Width: 3.00 in. 7.62 cm
Depth: 0.65 in. 1.65 cm