--- product_id: 546484019 title: "Infinity Alpha 2804A Car 4 Channel Amplifier (70W RMS*4) || New 2022 Model" brand: "infinity" price: "ΰΈΏ1497" currency: THB in_stock: false reviews_count: 5 url: https://www.desertcart.co.th/products/546484019-infinity-alpha-2804a-car-4-channel-amplifier-70w-rms-4 store_origin: TH region: Thailand --- # 10Hz – 45kHz Response 70W RMS x 4 40-400Hz Filter Infinity Alpha 2804A Car 4 Channel Amplifier (70W RMS*4) || New 2022 Model **Brand:** infinity **Price:** ΰΈΏ1497 **Availability:** ❌ Out of Stock ## Summary > 🎢 Amplify Your Drive with Style! ## Quick Answers - **What is this?** Infinity Alpha 2804A Car 4 Channel Amplifier (70W RMS*4) || New 2022 Model by infinity - **How much does it cost?** ΰΈΏ1497 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/546484019-infinity-alpha-2804a-car-4-channel-amplifier-70w-rms-4) ## Best For - infinity enthusiasts ## Why This Product - Trusted infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Sleek & Reliable:** A beautiful design that not only looks good but also delivers reliable performance. - β€’ **Unleash the Power:** Experience 70W RMS output per channel for a sound that commands attention. - β€’ **Tailored Sound Control:** Adjustable high-pass/low-pass crossover filters for a customized audio experience. - β€’ **Efficient Cooling Design:** Stay cool under pressure with an innovative cooling system that enhances performance. - β€’ **Seamless Auto Activation:** Enjoy hassle-free listening with the auto turn-on feature that kicks in when you need it. ## Overview The InfinityAlpha 2804A Car 4 Channel Amplifier is a cutting-edge Class AB amplifier designed for audiophiles who demand powerful sound and sleek aesthetics. With a rated power output of 70W RMS per channel, adjustable crossover filters, and a frequency response range of 10Hz to 45kHz, this amplifier ensures an immersive audio experience. Its efficient cooling design and auto turn-on feature make it a reliable choice for any car audio setup. ## Description Infinity Alpha Amplifiers. Make Your Drive Come Alive. Infinity's Alpha Class AB Car Amplifiers are available in 2-Channel and 4-Channel models and bring superior performance and flexibility to your next install without breaking the bank. Both Amplifiers feature a compact and elegant footprint, which are equipped with Adjustable High-Pass/Low-Pass Crossover Filters, Auto Turn on Facility and world-class Infinity reliability.If you only want power the bass, bridge the 2-Channel to 170 watt RMS. 4-Channel models will send 70 watts RMS to each of your front and rear speakers, the bridge model can power a pair of subwoofers with up to 180 watts RMS each. Powerful Class AB amplifier Class AB amplifier output stage combines the advantages of the Class A amplifier and the Class B amplifier while minimizing the problems of low efficiency and distortion associated with them. Adjustable High-Pass/Low-Pass Crossover Filter Alpha amplifiers have the High Pass Filter (HPF) and the Low Pass Filter (LPF), which allow you to adjust the frequency from 40Hz to 400Hz based on your own music taste to deliver the appropriate musical frequencies to speakers. Auto Turn On Facility When using the High-level signal inputs, the amplifier automatically turns on once a DC offset is detected (>2.5 volts). When using the Line-level signal inputs, the amplifier will also turn on once a +12V signal is detected from the remote turn-on wire. Efficient Cooling Design High performance amplifiers are not only powerful but also compact which depend on overall Efficient Cooling Design. Powerful Sound and Beautiful Look Infinity Alpha amplifiers deliver powerful sound with a beautiful appearance. Reliable Performance In order to deliver high quality sound and reliable performance, the high quality component such as audio capacitors, power MOSFET are selected for Alpha amplifiers. Review: Great Quality & Value Review: This is a excellent amp. Great value at β‚Ή8K ## Features - Features Powerful Class AB amplifier Adjustable High-Pass/Low-Pass Crossover Filter Auto Turn On Facility Efficient Cooling Design Powerful Sound and Beautiful Look Reliable Performance - What’s in the box:Alpha 2804A 1x Amplifier 4x 3/4" Self-tapping screws 2x Spare fuse 1x Quick start guide 2x 2-Channel high-level input wire harness - Technical Specifications:Alpha 2804A 4-Channel Class AB Car Amplifier Rated Power RMS Output: 70W x 4 @ 4 ohm; 90W x 4 @ 2 ohm; 180W x 2 @ 4 ohm bridged, 75dB Frequency Response (-3dB): 10Hz – 45kHz Gross weight: 2.77kg ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BBLCTJTF | | Brand | Infinity | | Color | Black | | Colour | Black | | Connector Type | Component | | Connector type | Component | | Customer Reviews | 3.7 out of 5 stars 18 Reviews | | Item package quantity | 1 | | Manufacturer | HARMAN INTERNATIONAL | | Mfr Part Number | 1 | | Model Number | Infinity Alpha 2804a | | Number of Ports | 4 | | Number of ports | 4 | | Package Quantity | 1 | | Specific Uses For Product | Amplifier | | Specific uses for product | Amplifier | | UPC | 050667378899 | ## Product Details - **Brand:** Infinity - **Colour:** Black - **Connector type:** Component - **Number of ports:** 4 - **Specific uses for product:** Amplifier ## Images ![Infinity Alpha 2804A Car 4 Channel Amplifier (70W RMS*4) || New 2022 Model - Image 1](https://m.media-amazon.com/images/I/41rihJFZIeL.jpg) ![Infinity Alpha 2804A Car 4 Channel Amplifier (70W RMS*4) || New 2022 Model - Image 2](https://m.media-amazon.com/images/I/21r9ObScTSL.jpg) ![Infinity Alpha 2804A Car 4 Channel Amplifier (70W RMS*4) || New 2022 Model - Image 3](https://m.media-amazon.com/images/I/21iuX-fKXVL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Quality & Value *by O***N on 12 July 2024* ### ⭐⭐⭐⭐ This is a excellent amp. Great value at β‚Ή8K *by A***A on 31 May 2023* ### ⭐⭐⭐⭐ Good one *by N***I on 18 January 2026* ## Frequently Bought Together - Infinity Alpha 2804A Car 4 Channel Amplifier (70W RMS*4) || New 2022 Model - Sony XM-N1004 4-Channel Stereo Car Audio Amplifier (Black) - Blaupunkt Damp 3.0 2mm Damping Sheets (Pack of 5) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/546484019-infinity-alpha-2804a-car-4-channel-amplifier-70w-rms-4](https://www.desertcart.co.th/products/546484019-infinity-alpha-2804a-car-4-channel-amplifier-70w-rms-4) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-29*