--- product_id: 806764441 title: "300W Digital Amplifier Speaker Protection Board Relay Protection Module 2.1 Three-Channel Speaker Delay Protection" brand: "quzenn" price: "FREE" currency: EUR in_stock: false url: https://www.desertcart.fi/products/806764441-300w-digital-amplifier-speaker-protection-board-relay-protection-module-2 store_origin: FI region: Finland --- # 300W Digital Amplifier Speaker Protection Board Relay Protection Module 2.1 Three-Channel Speaker Delay Protection **Brand:** quzenn **Price:** FREE **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** 300W Digital Amplifier Speaker Protection Board Relay Protection Module 2.1 Three-Channel Speaker Delay Protection by quzenn - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/806764441-300w-digital-amplifier-speaker-protection-board-relay-protection-module-2) ## Best For - quzenn enthusiasts ## Why This Product - Trusted quzenn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Quzenn Product parameters: voltage input DC12-16V or AC12-16VSound channel: three-channel can withstandPower: 300W x 3 or lessInstructions for use: Turn on the power indicator light, the work of the indicator light normal light relay suction, such as the impact of the protection board automatically adjusts the suction time (to be the current through the relay before suction). Power supply can be the same power supply with the amplifier, the three channels of the sound through of the negative pole of each line is , suitable for non-common ground and BTL circuit amplifier use: the terminals are 7.62 pitch, 1/2W metal film exceeds the standard use of the internal resistance to reduce the design specifically for high-current!Note: This protection board 15 seconds to switch on and off without a delay (the first time you switch on and off, to be 15 seconds after switching on before there is a delay)!Due to different batches, there may be differences in product appearance and printed text, which not affect useColour:As ShownMaterial:PCBPackage Contents:1 x Digital Amplifier BoardOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. ## Features - 4. This a common power DC protection board using optocoupler, because the optocoupler has a mutual isolation between the input and output, electrical signal transmission has a unidirectional characteristics, and thus has a good electrical insulation ability and anti-interference ability. - 3. This protection board uses 1.6 thick 1A copper , double-sided tin-plating process. - 1. With time delay and DC protection (default 1.8v control, DC sensitivity can be adjusted). - 2. relay as the core component is not afraid of contact ignition and oxidation, no loss of tone transmission. - 5. And because the input of the optocoupler belongs to the current-type work of the low-resistance parts, thus has a strong common mode rejection ability, to achieve the separation of the power supply and the , not have an impact on the . ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0GNFBMV15 | | Brand | Quzenn | | Item Weight | 80 Grams | | Manufacturer | Quzenn | | Number of items | 1 | ## Images ![300W Digital Amplifier Speaker Protection Board Relay Protection Module 2.1 Three-Channel Speaker Delay Protection - Image 1](https://m.media-amazon.com/images/I/61W5LI20r1L.jpg) ![300W Digital Amplifier Speaker Protection Board Relay Protection Module 2.1 Three-Channel Speaker Delay Protection - Image 2](https://m.media-amazon.com/images/I/71J5y9F5lOL.jpg) ![300W Digital Amplifier Speaker Protection Board Relay Protection Module 2.1 Three-Channel Speaker Delay Protection - Image 3](https://m.media-amazon.com/images/I/610rzhIeJbL.jpg) ![300W Digital Amplifier Speaker Protection Board Relay Protection Module 2.1 Three-Channel Speaker Delay Protection - Image 4](https://m.media-amazon.com/images/I/71172Ja73vL.jpg) ![300W Digital Amplifier Speaker Protection Board Relay Protection Module 2.1 Three-Channel Speaker Delay Protection - Image 5](https://m.media-amazon.com/images/I/71cL3kkz1lL.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fi/products/806764441-300w-digital-amplifier-speaker-protection-board-relay-protection-module-2](https://www.desertcart.fi/products/806764441-300w-digital-amplifier-speaker-protection-board-relay-protection-module-2) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-08-31*