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Full machine-readable index: https://core-electronics.com.au/llms.txt # Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302 **Type:** Product page · **SKU:** ADA2130 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/mono-2-5w-class-d-audio-amplifier-pam8302.html ([markdown](https://core-electronics.com.au/mono-2-5w-class-d-audio-amplifier-pam8302.html.md)) This super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the miniature chip is a class... ## Pricing - **Price:** $7.30 (inc GST) — $6.64 AUD, exc GST - **Quantity discounts:** 10+ $6.44 (exc GST) · 50+ $6.31 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 15 today, and up to 500 more in 8–12 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA2130:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA2130:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description This super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC. Since the amp is a class D, its very efficient (over 90% efficient when driving an 8O speaker at over half a Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but Adafruit could barely tell it got hot. There's even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain. This board is a welcome upgrade to basic "LM386" amps! The A+ and A- inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' - if you don't have differential outputs, simply tie the Audio- pin to ground. The output is "Bridge Tied" - that means the output pins connect directly to the speaker pins, no connection to ground. The output is a high frequency 250KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly. Comes with a fully assembled and tested breakout board. They also include header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach/detach your speaker. You will be ready to rock in 15 minutes! **Speaker is not included. Use any [speaker](https://core-electronics.com.au/components/speakers.html) with an impedance of 4Ω or higher and a power rating of 2.5W or more.** - Output Power: 2.5W at 4O, 10% THD, 1.5W at 8O, 10% THD, with 5.5V Supply - 50dB PSRR at 1KHz - Filterless design, with ferrite bead + capacitors on output. - Fixed 24dB gain, onboard trim potentiometer for adjusting input volume. - Thermal and short-circuit/over-current protection - Low current draw: 4mA quiescent and 1uA in shutdown mode ## Technical Details - [PAM8302A datasheet](https://core-electronics.com.au/attachments/localcontent/PAM8302A_54242190383.pdf) - [EagleCAD PCB files on GitHub](https://github.com/adafruit/Adafruit-PAM8302-Mono-Amplifier-PCB) - [Fritzing object available in Adafruit Fritzing library](https://github.com/adafruit/Fritzing-Library) Dimensions (without 0.1" header): - 15mm x 24mm x 2mm / 0.6" x 0.9" x 0.08" - Weight: 1.4g ![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg) ## Guides for this product - [How to Use Speakers and Amplifiers with Your Project](https://core-electronics.com.au/guides/analogue-electronics/how-to-use-speakers-and-amplifiers-with-your-project/) ## Videos for this product - [How to Use Speakers and Amplifiers with Your Project](https://core-electronics.com.au/videos/how-to-use-speakers-and-amplifiers-with-your-project) - [Sound FX Buzzer Project](https://core-electronics.com.au/videos/sound-fx-buzzer-project) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/2/1/2130-01.jpg)