RDL STPA2 Data Sheet

STICK-ON® SERIES

Model ST-PA2
Utility Power Amplifier

ANYWHERE YOU NEED...

• Up to 2 Watts RMS into 8 Ω

• Up to +12 dBu into 600 Ω

• Quality Utility Amplifier

• Intercom Driver

• Music-On-Hold Driver

You Need The ST-PA2!

The ST-PA2 is a utility power amplifier in the convenient line of STICK-ON products from Radio Design
Labs. The durable bottom adhesive permits quick, permanent or removable mounting nearly anywhere or
it may be used with RDL’s racking accessories. The ST-PA2 gives you the advantages of a utility
amplifier with the added convenience of STICK-ONs!

APPLICATION: The ST-PA2 represents the second-generation in RDL’s breakthrough in the traditional
power vs. size ratio. Present technology permits features and performance at the most economical cost
ever. The ST-PA2 offers 2 Watts of power, twice the power of most utility amplifiers, for a price you would
expect to pay for 1 Watt!

The ST-PA2 features a single, unbalanced audio input, a gain control, and two outputs. The first output is
designed to deliver a clean 2 Watts RMS into an 8 Ω speaker. The second output is intended to drive
600 Ω transformers, typically on equipment inputs. This makes the ST-PA2 uniquely suited applications
such as music-on-hold inputs on telephone systems, which may have either 8 Ω or 600-Ω inputs.
If desired, both outputs may be used at the same time.

The convenience and low cost of the ST-PA2 make it the ultimate choice as a building block in many
systems, from simple to complex. It may be used in combination with other STICK-ONs to form custom
intercoms or talk-back systems, or can be used by itself to drive a single speaker with music or voice.
For either straightforward or creative applications requiring a utility power amplifier, the ST-PA2 is the
optimum choice!

Note: The ST-PA2 is not intended to drive long 600 Ω audio lines or multiple equipment inputs. For these
applications, see the STA-1 (stereo), the STA-1M (mono), or the ST-DA3 (distributed). If balanced audio
input is required, see the ST-PA6 audio power amplifier.

Wherever an audio amplifier is needed, the ST-PA2 is the ideal choice. Use the ST-PA2 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 ST-PA2
Utility Power 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 Configuration: Unbalanced 10 kΩ
Input Level: -15 dBV minimum (for rated power output)

-20 dBV minimum (for 1 watt RMS into 8 Ω)
Frequency Response: 35 Hz to 30 kHz (8 Ω +/- 1.5 dB)
20 Hz to 30 kHz (600 Ω +/- 0.5 dB)
THD+N: < 0.75% (0.5 % typical)
Noise: < -80 dB (8 Ω @ 2 W RMS)
< -70 dB (600 Ω, referred to +4 dBu)
Outputs (2): 1 @ 8 Ω, 2 watts RMS maximum
1 @ 600 Ω, +12 dBu maximum
Power: 24 to 33 Vdc @ 150 mA, Ground-referenced

Radio Design Labs Technical Support Centers

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

891-0006I

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