P
A
ASP
AP8111

PRELIMINARY

TruBass Audio Enhancement Processor
1 Overview
The AP8111 is a bass enhancement processor based on SRS Labs, Inc.’s 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 t
home theatre e
other compact hi-fi system
2 Features
null Operati
null Low Operat
null Power down and B
null Analog swi
null External adjustm
null Bipolar Technol
null Chip Package 28 pins SOP


The TruBass technology
Microelectronics Lt
are trademarks of SRS L
corresponding sale
technology. SRS Labs
Manual separately provi


For further information, please contact:
SRS Labs, Inc.
2909 Daim
Tel: 949-442-1070











ASP Microelectronics Ltd.
Unit 218, 2/F., Tech C
72 Tat Chee Ave., Kowl
Tel:(852) 2797 3288 Fax:
http://www.asp.com
Revision 2.4


herefore most suitable for applications that use small size speakers yet need to deliver the best audio quality or
ffect: Mini or Micro Stereo Sound Systems, TV, CD, Boombox, Car Audio, DVD Receiver, Set-Top-Box, and
s such as Discman, MD, MP3 player, as well as PCs.
ng Voltage 4.75V to 5.25V
ion Current 10mA typ
ypass mode selection
tch for mode and gain control
ent for speaker size setting (small, medium and large)
ogy
rights in the AP8111 are owned by SRS Labs, a United States. Corporation and licensed to ASP
d. TruBass is protected under US and foreign patents issues and/or pending. TruBass and the symbol
abs, Inc. in the United State and selected foreign countries. Neither the purchase of the AP8111, nor the
of audio enhancement equipment conveys the right to sell commercialized recordings made with any SRS
requires all set makers to comply with all rules and regulations as outlined in the SRS Trademark Usage
ded.
ler Street, Santa Ana, CA 92705 USA
Fax: 949-852-1099 http://www.srslabs.com
[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.
entre,
oon Tong, Hong Kong
(852) 2797 3112
.hk
15 April., 2002 1