S.M.S.L SA-36A(Black)
SMSL SA-36A Pro Digital Amplifier User Manual
Model: SA-36A(Black)
Introduction
This manual provides comprehensive instructions for the setup, operation, maintenance, and troubleshooting of your SMSL SA-36A Pro Digital Amplifier. Please read this manual thoroughly before using the product to ensure proper function and longevity.
The SMSL SA-36A Pro is a high-grade digital integrated stereo amplifier designed for audio enthusiasts. It features a robust aluminum casing with a sand-blasted, wiredrawing, oxidation, and laser engraving finish. At its core, it utilizes the Texas Instruments TPA3118D2DAP chip, complemented by high-quality components such as EPCOS, Panasonic, TDK, TI, AV, and PYCOS accessories. Its compact size makes it ideal for desktop use.
Product Overview

Front-right view of the SMSL SA-36A Pro Digital Amplifier, showcasing its compact black aluminum chassis, power button, and volume knob.

Front-left view of the amplifier, highlighting the power button and volume control on the brushed black aluminum front panel.

Direct front view of the amplifier, showing the "S.M.S.L" branding, "POWER" button, "SA-36A pro" model designation, and the large volume knob with "MIN" and "MAX" indicators.

Rear view of the amplifier, displaying the RCA audio input jacks (L/R), speaker output terminals (L/R with positive and negative connections), and the DC power input (12-15V).

Side view of the amplifier, showing the textured top surface and the prominent volume knob on the front panel.

Bottom view of the amplifier, revealing the four rubber feet for stability and a "QC PASS" sticker.

Angled rear view of the amplifier, providing a clear look at the audio input and speaker output connections.

Internal view of the amplifier's circuit board, showing the various electronic components, capacitors, and the main TPA3118D2DAP chip.

The SMSL SA-36A Pro Digital Amplifier shown alongside its included 12V power adapter and power cord.
Package Contents
Verify that all items are present in the package:
- 1 x SMSL SA-36A PRO Amplifier
- 1 x 12V Power Adaptor
- 1 x Power Cord
- 1 x User Manual (this document)
Safety Precautions
- Do not expose the unit to rain or moisture.
- Do not disassemble the unit. Refer all servicing to qualified personnel.
- Ensure proper ventilation around the amplifier. Do not block ventilation openings.
- Use only the provided power adapter. Using an incorrect power supply may damage the unit.
- Keep the unit away from heat sources, direct sunlight, and strong magnetic fields.
- Disconnect power before cleaning or when not in use for extended periods.
Setup
1. Connecting Speakers
- Ensure the amplifier is powered off and unplugged.
- Connect your passive speakers to the "SPEAKER OUT" terminals on the rear of the amplifier.
- Match the positive (+) terminal of the amplifier to the positive (+) terminal of your speaker.
- Match the negative (-) terminal of the amplifier to the negative (-) terminal of your speaker.
- Ensure a secure connection. The terminals support both bare wire and banana plugs.
- Connect the left speaker to the "L" terminals and the right speaker to the "R" terminals.
2. Connecting Audio Source
- Connect your audio source (e.g., CD player, DAC, computer, smartphone) to the "AUDIO IN" RCA jacks on the rear of the amplifier.
- Use an RCA cable to connect the left channel of your source to the "L" input and the right channel to the "R" input.
3. Connecting Power
- Connect the provided 12V power adapter to the "POWER 12-15V" DC input jack on the rear of the amplifier.
- Plug the power adapter into a suitable wall outlet.
Operating Instructions
Power On/Off
- Press the "POWER" button on the front panel to turn the amplifier on. The power indicator will illuminate.
- Press the "POWER" button again to turn the amplifier off.
Volume Control
- Rotate the large knob on the front panel clockwise to increase the volume.
- Rotate the large knob counter-clockwise to decrease the volume.
- Start with the volume at a low level before playing audio to avoid sudden loud sounds.
Audio Playback
- Ensure all connections are secure and the amplifier is powered on.
- Start playback from your connected audio source.
- Adjust the volume to your desired listening level.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or aerosols.
- Ventilation: Ensure the ventilation slots are clear of dust and debris to prevent overheating.
- Storage: If storing the unit for an extended period, disconnect it from power and store it in a cool, dry place.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not connected; Power outlet not active; Power adapter faulty. | Check power cord connection; Try a different outlet; Test power adapter if possible. |
| No sound | Incorrect audio input connection; Speaker wires loose or incorrectly connected; Audio source volume too low or muted; Amplifier volume too low. | Verify RCA cable connections; Check speaker wire polarity and tightness; Increase audio source volume; Increase amplifier volume. |
| Distorted sound | Volume too high; Speaker impedance mismatch; Faulty audio source or cable. | Reduce volume; Ensure speakers are within supported impedance range (4-8Ω); Test with a different audio source or cable. |
| Humming or buzzing noise | Ground loop; Interference from other electronic devices; Loose connections. | Ensure all components are on the same power circuit; Move amplifier away from other electronics; Check all cable connections. |
Specifications
| Feature | Detail |
|---|---|
| Model | SA-36A Pro |
| Core Chip | Texas Instruments TPA3118D2DAP |
| Output Power | 25W (4Ω) / 20W (8Ω) |
| Dynamic Range (DR) | 103dB |
| Signal Input | RCA gold-plated lotus input |
| Signal Output | 4 line signal output (speaker terminals) |
| Power Supply | DC12-24V (external diameter: 5.5mm, heart diameter: 2.1mm) |
| Material | All aluminum chassis |
| Dimensions (approx.) | 150 x 92 x 43mm / 5.9 x 3.6 x 1.7 inches |
| Net Weight (approx.) | 500g / 1.1 lbs |
| Channels | 2 |
Warranty and Support
For warranty information and technical support, please refer to the official S.M.S.L website or contact your local distributor. Keep your purchase receipt as proof of purchase for warranty claims.
Manufacturer: SMSL
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.

