User Guide

There is also a Digital Input selector on the front panel and remote control. If you are connecting
any audio/video components to the AUX/TV or DVD inputs, during the initial set-up and before
operating the unit, you must select the type of audio input signal used for each component.
Use the Digital Input selector on the front panel or on the remote control to select between
analog and digital inputs. This must be done when using the AUX/TV and/or DVD functions
on the DD81. Once the input signal is set for each of these functions, the DD81 will remember
the input type for all future uses. Specific instructions for connecting digital audio/video
components to the DD81 are included below. It is recommended you read these instructions
before starting set-up.
Digital audio input jacks for connecting digital audio/video components
There are three digital input jacks and one digital output jack on the rear of the DD81. To enjoy
the built-in Dolby Digital Surround Sound feature, you must use a digital connection when
connecting a digital audio/video component such as a DVD player or digital cable box.
To connect a DVD player, use a single coaxial cable with RCA type jacks on both ends (available
at your local electronics store). Connect one end to the Digital Coaxial audio output on the DVD
player and the other end to the Digital Coaxial audio input on the rear of the DD81 (see page 8 for
connection diagram).
To connect a digital TV (HDTV), cable or satellite box, use a coaxial or optical audio cable (available
at your local electronics store). Connect one end to the Digital audio output on the TV/cable/satellite
box and the other end to the Digital audio input marked TV/AUX on the rear of the DD81.
(Note, some digital cable and satellite boxes do not have digital audio outputs. In this case, you
should connect the box to the DD81 using a standard analog audio cable with dual RCA type jacks
on each end. Connect one end to the two analog audio output jacks on the rear of the box and the
other end to the TV/AUX analog audio input jacks on the rear of the DD81(see pg. 9 for connection
diagram).
Digital Input Selector
If you connect any audio/video component to the AUX/TV or DVD audio inputs on the rear of the
DD81 (ie: TV, DVD, cable/satellite box), you must select the type of audio signal used for each
component connected. This must be done during initial set-up and before operating the DD81.
Using the Digital Input selector on the front panel or remote control, select the appropriate input
type used as follows:
Function Select Audio Input Signal Used
AUX/TV Analog – Optical – Coaxial
DVD Analog - Coaxial
After this first-time setting, the DD81 will memorize the type of audio input selected for all future uses.
Important: If you connect audio/video components to the AUX/TV or DVD functions of the DD81 and
after initial set-up you cannot hear audio sound, check which type of audio input has been selected.
If the audio input selected does not match the type of audio input actually used, you will not hear any
sound. Press the Digital Input Selector button one time to see which input has been selected. With
the input still illuminated in the display, press again to change the input.
If you have any questions about operating the DD81 home theater music system, call the
Techwood product support center at 888-440-3465, Monday to Friday, 8AM – 4PM CST.
INTRODUCTION
4
BASSBASS TREBLETREBLE BALANCEBALANCE
DIGITAL INPUTDIGITAL INPUT SURROUND MODESURROUND MODE MODE/RIFMODE/RIF REC/PAUSEREC/PAUSE
STEREO DIRECTSTEREO DIRECT