HTD SZA-2A Owner's Manual

POWER

Sub-Zone Amplifier SZA-2A

VOLUME

Min

Max

Protect

L 4 Ω Minimum

AC 120V~60Hz

Power Consumption: 135W

R

POWER

Sub-Zone Amplifier SZA-2A

VOLUME

Min

Mono

ON

MINMAX

AUTO

POWER

DELAY

AUTO-SWITCH

INPUT 1 2

SPEAKERS

+

_

Stereo

L

R

12

Max

Protect

INPUT

SZA-2A

Owner’s Manual

Thank you for giving Home Theater Direct the chance to win your business! We are condent you
will nd that HTD offers an outstanding combination of performance and value in everything we
make. To ensure you get the most out of your new equipment, please take a moment to read this
manual before you get started. Should you lose this manual, you can always download or print a
copy from www.htd.com.

SZA-2A Features

Power Indicator Light

Power Button

Source Input Connections

Mono/Stereo Switch

Amplier Protection Light

Delay Knob

Speaker Terminals

Power Switch

Front

Volume Control

6’ Power Cable

Back

Speaker Terminals

• 5-way binding post terminals provide multiple options for how you connect speaker cable to the SZA-2A. These termi­nals accept bare wire, spade connectors, and multiple types of banana plugs. You can safely connect one pair of 4-8
ohm speakers, or two pairs of 8 ohm speakers in parallel.

Mono/Stereo Switch

• Set to Stereo when your two speakers are placed in the same room and not spread too far apart. This will cause the
speaker(s) connected to the Left Speaker Terminals to hear the signal from the Left inputs and the speaker(s) connect­ed to the Right Speaker Terminals to hear the signal from the Right inputs. When your speakers are spread far apart
in a large room or when your speakers are placed in separate rooms, set to Mono. When set to mono, all speakers

attached to the SZA-2A will receive the same signal which is the sum of the Left and Right inputs.

V.12.22.17

SZA-2A Features

1

Power Button

• The amplier will only operate when this button is pressed in. Use this button to turn the amplier on or off.

Power Switch

• When set to ON and the Power Button is pressed in, the amplier will always be fully powered on.

• When set to AUTO and the Power Button is pressed in, the amplier will be in stand-by mode until a signal is sensed in
either Input 1 or 2. The amplier will return to stand-by mode automatically whenever a signal has not been sensed in
either input for a long period of time. In stand-by mode, the amplier only draws enough power to operate the auto-on

circuit.

The recommended setting is to have the POWER Button pressed in and have the POWER Switch set to
AUTO. In this way, the amplier will automatically fully power on when a signal is present in either Input
1 or 2, and return to stand-by mode when no signal has been present for a long period of time. However,
if you often listen at very low volumes where the input signal is too low to be detected by the auto-on

circuit, you may achieve better results with the Power Switch set to On

Power Indicator Light

• Blue indicates the amplier is fully powered on.

• Amber indicates the amplier is in stand-by mode.

Volume Control

• Adjusts the volume level being sent to the attached speakers. For most uses, this knob should be set one time and
then left alone. This is because most of today’s audio sources have their own, independent volume control. To set,
start with the volume knob positioned around 10:00. Play one of your sources at maximum volume and gradually turn
the volume knob up (clockwise) until you reach the desired maximum listening level within the room.

Source Input Connections

• You can connect up to two sources into the SZA-2A with Input 1 having priority over Input 2. With this feature, by
adjusting the source signal of your two sources, you are able to control which source gets amplied and heard through
your speakers. There is no need to manually select between sources at the amplier.

How it works: The SZA-2A includes a proprietary circuit that will automatically switch to Input 1 when­ever its audio signal reaches a minimum threshold (around 7mV). The amp will switch back to Input 2
whenever this threshold is not met over a specic period of time. When both input sources are simulta­neously playing, the auto-switching works best when the Input 1 signal is consistently above the thresh­old.

Delay Knob

• Use this knob to adjust the amount of time required for no source to be detected at Input 1 before the amp will switch
to Input 2. When set all the way counter-clockwise, when just half second of silence is detected at Input 1, the ampli­er will switch to Input 2. Rotate clockwise to increase the delay time up to nearly ten minutes. Note that the amplier
will always switch to Input 1 immediately upon sensing its signal.

Amplier Protection Light

• This light will only when a problem exists that triggers the built-in protection mode. The amplier will shut down until the
problem is resolved.

2