SY Electronics SY-2A-20W 20W Power Amplifier Installation Guide
- June 26, 2024
- SY Electronics
Table of Contents
SY-2A-20W
Installation Guide
20W Power Amplifier
The SY-2A-20W is a 20W stereo Power Amplifier that may be used with other SY HD-BaseT products, or with the SY-HD-3.5AD HDMI Audio De-embedder, or even as standalone amplifier. This amplifier also features a voiceover capability that will allow its use in presentation applications.
Features
- Two selectable line level inputs
- Talk-over microphone input
- Talk-over microphone has three operating modes: 48V, MIC level, or LINE level
- Three operational modes: Stereo, Mono or Bridge
- Stereo line level output
- Auto muting when no input signal present
- IR control to adjust the amplifier remotely (Optional)
- RS232 control for computer control
Connectors and Controls
Front
| Name | Description |
|---|
Amplifier Configuration
Switch
| Sets how the power amplifier is configured: Stereo , Mono or
Bridge
IR| Remote IR detector Input (3.5 mm jack) , used with the IR key pad
RS232 (3-way terminal)| RS232 Tx and Rx connections
MIC / LINE (3-way terminal)| Input for the talk-over microphone, the
operating mode of this input is set by the switch next to it. This connector
can accept balanced signals or single-ended signals
MIC / LINE mode switch| Sets the operating mode of the MIC / LINE input
connector: MIC level with 48V phantom power
MIC level (without phantom power)
LINE level (without phantom power)
Line Input 1| Two phono (RCA) connectors for Left and Right line level
inputs
Line Input 2| 3.5 mm stereo line level input
Rear
| Name | Description |
|---|---|
| 24V DC | 24V DC Power input – only use the power supply provided |
| Line Out | Stereo 3.5mm line out signal |
| Speakers | Connect the speakers in accordance with the amplifier |
configuration switch
Top
| Name | Description |
|---|---|
| Input Select | Amplifier input 1 or 2 selection |
| Adjustment Select | Selects the parameter adjustment for: MIC, LINE, |
BASS, TREBLE
Decrease Button ▼| Press to decrease the selected parameter value
Increase Button ▲| Press to increase the selected parameter value
Mute Button| Mute the Amplifier output
Using the SY-2A-20W Power Amplifier
Connecting the Outputs and Inputs
Firstly, decide on the output configuration you require as this affects how the speakers are wired to the SY-2A-20W:
Second, decide on the microphone connector mode. Do not switch to 48V phantom
power mode while the SY-2A-20W unit is powered up as this may damage the power
amplifier MIC / LINE input, themicrophone, or both.
48V phantom power mode should only be used with microphones that require it,
such as some condenser microphones.
Where phantom power is not required and the source signal level is not known,
always begin with the switch set to LINE and then try the MIC setting if no
sound can be heard even after adjusting the controls on the SY-2A-20W unit.
Once the two three-position switches have been set, the remaining audio
sources should be connected and the amplifier can be powered up.
Using the Top Panel Controls
The INPUT SEL switch toggles between Line input 1 and line input 2. In either
case, the MIC / LINE input will always be present at the output.
The next switch controls the volume of either the MIC / LINE input or the
selected LINE 1 or LINE 2 input.
This switch also provides control for the bass and treble settings for the
LINE OUT and the speaker output.
Use the up ( ) and down ( ) buttons to adjust the value of the selected
setting. The LED above the button will flash for each press of the up or down
button. If the LED above the button remains on then the maximum or minimum
value has been reached.
| Setting | Up / Down Buttons Control: |
|---|---|
| MIC | Volume of the MIC / LINE input |
| LINE | Volume of the selected LINE input |
| BASS | Bass response of the output |
| TREBLE | Treble response of the output |
The MUTE button turns off all audio output while its LED is lit.
Cascading SY-2A-20W Amplifiers
The SY-2A-20W can be cascaded to provide more speaker outputs to cover a
larger space by connecting the LINE OUT of the preceding SY-2A-20W to either
of the two LINE inputs of the next SY2A-20W amplifier.
Using IR Remote Controls
Connect the IR sensor to the IR socket and place the detector in sight of the
remote control keypad. The keypad controls the same amplifier functions as the
top panel buttons:
| Button | Function |
|---|---|
| Input Select 1 | Selects line input 1 |
| Input Select 2 | Selects line input 2 |
| Mic Mute | Mutes the MIC / LINE input |
| Line Mute | Mutes the selected line input signal |
| Speaker | Unmutes both the MIC / LINE and the selected line input. |
| MIC+ & MIC- | Increase or decrease the MMIC / LINE input volume |
| LINE+ & LINE- | Increase or decrease the selected line input volume |
| BASS+ & BASS- | Increase or decrease the bass response |
| TREBLE+ & TREBLE- | Increase or decrease the treble response |
RS232 Control Commands
The following RS232 commands provide control of the SY-HD-S41 from a PC,
laptop or programmable control panel. The RS232 settings are: 9600 baud, 8
bits, no parity, and 1 stop bit.
All response values given in the following table are examples only. The actual
response values will reflect the changes that the transmitted RS232 command
has just made.
Numerical values for the direct setting commands are in decimal only.
| Action | Command | Response |
|---|---|---|
| Select input 1 | 1A1. | A: 1 -> 1 |
| Select input 2 | 2A1. | A: 2 -> 1 |
| Mute MIC / LINE input and Line Out | 0A0. | Mute Audio |
| Mute MIC / LINE input only | 1A0. | Mute MIC |
| Mute Line Out only | 2A0. | Mute LIN |
| Check the status of the amplifier settings | 600% | A: 1 -> 1 |
Volume : 30
Bass: 00
Treble: 00
Raise MIC / LINE volume| 601%| Volume of MIC: 51
Lower MIC / LINE volume| 602%| Volume of MIC: 50
Raise LINE volume| 603%| Volume of LINE: 51
Lower LINE volume| 604%| Volume of LINE: 50
Safety Instructions
To ensure reliable operation of this product as well as protecting the safety of any person using or handling these devices while powered, please observe the following instructions.
- Use the power supplies provided. If an alternate supply is required, check the voltage, polarity and that it has sufficient power to supply the device it is connected to.
- Do not operate this product outside the specified temperature and humidity range given in the above specifications.
- Ensure there is adequate ventilation to allow this product to operate efficiently.
- Repair of the equipment should only be carried out by qualified professionals as these products contain sensitive devices that may be damaged by any mistreatment.
- Ensure that this product operates in a dry environment. Do not allow any liquids or harmful chemicals to come into contact with these products.
Specifications
General
| Power Supply | 24V DC @ 2.71A |
|---|---|
| Power Consumption | 40 W max |
| RS232 | 9600, 8 data bits, 1 stop bit, no parity – No handshaking |
Audio
| Frequency Response | 20 Hz to 20 kHz |
|---|---|
| Channel Separation | > 75 dB |
| Input Impedance (LINE 1 & 2) | 10 k ohms |
| Input Impedance (MIC / LINE) | 10 k ohms |
| Speaker Output | 2 x 20 W into 4 ohms |
Environmental
| Operating Temperature | 0 – 40 °C non condensing |
|---|
Physical
Dimensions (W x H x D)| 99 x 39 x 86 mm (not including connectors or
flanges)
---|---
Weight| 270 g
After Sales Service
-
Should you experience any problems while using this product, firstly refer to the Troubleshooting section in this manual before contacting SY Technical Support.
-
When calling SY Technical Support, the following information should be provided:
• Product name and model number
• Product serial number
• Details of the fault and any conditions under which the fault occurs. -
This product has a two year standard warranty, beginning from the date of purchase as stated on the sales invoice. Online registration of this product is required to activate the full three year extended warranty. For full details please refer to our Terms and Conditions.
-
SY Product warranty is automatically void under any of the following conditions:
• The product is already outside of its warranty period
• Damage to the product due to incorrect usage or storage
• Damage caused by unauthorised repairs
• Damage caused by mistreatment of the product -
Please direct any questions or problems you may have to your local dealer before contacting SY Electronics.