RDL STPA6 Data Sheet

STICK-ON® SERIES

Model ST-PA6
Audio Power Amplifier

ANYWHERE YOU NEED...

• Up to 6 Watts RMS Into 8 Ω

• Amplifier with Balanced Audio Inputs

• Built In Two-Input Mixer

• Low Noise and Distortion

• Amplifier with “Loudness” Equalization

You Need The ST-PA6!

The ST-PA6 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-PA6 gives you the advantages of a quality
audio power amplifier with the added convenience of STICK-ONs!

The ST-PA6 represents the second-generation in RDLs breakthrough in the traditional power vs. size
ratio. Present technology permits features and performance at the most economical cost ever. The
ST-PA6 offers 6 Watts of power for a price you would expect to pay for 3 Watts!

APPLICATION: The ST-PA6 features two balanced audio inputs, a gain control, and an 8 Ω output. The
output is designed to deliver a clean 6 Watts RMS into an 8 Ω speaker. Each input is a balanced bridge,
with the two inputs mixed equally. This is particularly useful for monitoring a stereo line. The output stage
features protection against short-circuits and thermal overload. The output protection automatically resets
once the condition is removed, making fuse protection unnecessary!

The compact design and low cost of the ST-PA6 allow using it to individually drive each speaker in many
installations. Since most applications using low speaker power levels are running music at a background
level, speaker inefficiencies tend to produce a thin sound lacking in low frequencies. The traditional
approach to correct this has been to cut the high frequency response producing an apparent increase in
bass. The ST-PA6 now offers actual equalization, permitting the installer to set the low frequency boost,
rather than a high-frequency cut. As reproduction quality has improved, listeners have become more
sophisticated, and crisp, high-frequency response is expected in a quality sound system. With the
ST-PA6, this flexibility is now available for the cost of a typical utility amplifier!

The convenience and low cost of the ST-PA6 make it the ideal choice as a building block in many
systems, from simple to complex. Used in combination 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-PA6
Audio 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

Inputs: 2 @ 100 kΩ balanced (may be wired unbalanced, inputs equally combined)
Input Level: 400 mV (RMS) minimum (for rated power output)
Freq. Response: 35 Hz to 30 kHz (+/- 1.5 dB w/EQ setting flat)
THD: < 0.350%
Noise: < -60 dB
Output: 8 Ω unbalanced, 6 watts RMS
Equalization: Single-turn adjustment:
Flat to +5 dB @ 60 Hz (center frequency of boost)
Flat to +4 dB @ 100 Hz
Flat to +3 dB @ 120 Hz
Power: 24 to 33 Vdc @ 350 mA, Ground referenced

Radio Design Labs Technical Support Centers

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

891-0007H

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