P
A
ASP
TruBass Audio Enhancement Processor
AP8111
PRELIMINARY
1 Overview
The
AP8111
is a bass enhancement processor based on SRS Labs, Inc.鈥檚 patented TruBass technology. TruBass is a
revolutionary psychoacoustic bass enhancement technology that provides deep, rich bass to small speakers without the need
for a subwoofer or additional extra physical components. Deep bass now becomes possible even through speakers with
limitations in driver and cabinet design. TruBass circuitry actively monitors the low-frequency content of an audio signal
and optimizes the frequency and amplitude spectrum of the output signal to enhance bass perception. For systems with a
subwoofer, TruBass complements and enhances bass performance.
TruBass is therefore most suitable for applications that use small size speakers yet need to deliver the best audio quality or
home theatre effect: Mini or Micro Stereo Sound Systems, TV, CD, Boombox, Car Audio, DVD Receiver, Set-Top-Box, and
other compact hi-fi systems such as Discman, MD, MP3 player, as well as PCs.
2 Features
Operating Voltage 4.75V to 5.25V
Low Operation Current 10mA typ
Power down and Bypass mode selection
Analog switch for mode and gain control
External adjustment for speaker size setting (small, medium and large)
Bipolar Technology
Chip Package
28 pins SOP
The TruBass technology rights in the
AP8111
are owned by SRS Labs, a United States. Corporation and licensed to ASP
Microelectronics Ltd. TruBass is protected under US and foreign patents issues and/or pending. TruBass and the
symbol
are trademarks of SRS Labs, Inc. in the United State and selected foreign countries. Neither the purchase of the
AP8111,
nor the
corresponding sale of audio enhancement equipment conveys the right to sell commercialized recordings made with any SRS
technology. SRS Labs requires all set makers to comply with all rules and regulations as outlined in the SRS Trademark Usage
Manual separately provided.
For further information, please contact:
SRS Labs, Inc.
2909 Daimler Street, Santa Ana, CA 92705 USA
Tel: 949-442-1070
Fax: 949-852-1099
http://www.srslabs.com
ASP Microelectronics Ltd.
Unit 218, 2/F., Tech Centre,
72 Tat Chee Ave., Kowloon Tong, Hong Kong
Tel:(852) 2797 3288
Fax: (852) 2797 3112
http://www.asp.com.hk
Revision 2.4
1
[CAUTION]
The information in this publication is believed
to be accurate in all respects at the time of
publication but is subject to change without
notice. ASP Microelectronics Ltd. assumes no
responsibility for errors and omissions, and
disclaims responsibility for any consequences
resulting from the use of information included
herein. Additionally, ASP Microelectronics Ltd.
assumes no responsibility for the functioning of
undocumented features or parameters.
15 April., 2002
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