--- product_id: 515111238 title: "Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - includes Bass Remote" brand: "harmony audio" price: "฿34338" currency: THB in_stock: false reviews_count: 5 category: "Harmony Audio" url: https://www.desertcart.co.th/products/515111238-harmony-audio-ha-a400-1-car-stereo-class-d-amp store_origin: TH region: Thailand --- # 800W Peak Power 1-Ohm Stable Output Remote Bass Control Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - includes Bass Remote **Brand:** harmony audio **Price:** ฿34338 **Availability:** ❌ Out of Stock ## Summary > 🎵 Drive the bass revolution with Harmony Audio’s powerhouse amp! ## Quick Answers - **What is this?** Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - includes Bass Remote by harmony audio - **How much does it cost?** ฿34338 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/515111238-harmony-audio-ha-a400-1-car-stereo-class-d-amp) ## Best For - harmony audio enthusiasts ## Why This Product - Trusted harmony audio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Installation:** DC offset turn-on and included speaker wire to RCA adapter simplify setup, making pro-grade sound accessible to every enthusiast. - • **Control at Your Fingertips:** Included bass remote lets you fine-tune your audio vibe without leaving the driver’s seat—because your sound should adapt to you. - • **Power that Commands the Road:** Unleash a thunderous 800W peak output for crystal-clear, heart-pounding bass that transforms every drive into a concert. - • **Engineered for Deep Bass Precision:** Stable 1-ohm impedance ensures your subwoofer hits those low frequencies with unmatched depth and clarity. - • **Seamless Expansion with Daisy Chain:** Innovative daisy chain feature lets you effortlessly connect additional amps or accessories, future-proofing your sound system. ## Overview The Harmony Audio HA-A400.1 is a high-performance Class D mono amplifier delivering 800 watts peak power with 1-ohm stability, designed for deep, resonant bass. Featuring a remote bass control, daisy chain capability for system expansion, and versatile turn-on options including DC offset, it combines professional-grade sound with user-friendly installation. Its brushed aluminum case with LED indicators adds a sleek, modern touch to any car audio setup. ## Description Specifications:Alloy Series Mono - 1 Channel Class D AmplifierPower Handling: 14.4V @ 1 Ohm 400 Watts RMS x 1 800 Watts PEAK x 1 14.4V @ 2 Ohm 300 Watts RMS x 1600 Watts PEAK x 1 Frequency Response: 10Hz-180HzSignal to Noise Ratio: 95dB, A-weightedRCAs: Input and Full Pass Through Audio OutputTurn On: DC Offset or 12V RemoteRecommended External Fuse: 50ARecommended Wiring Power Gauge: 4 GaugeDimensions: 9-3/16" Width x 6-1/8" Width x 2" HeightUser Adjustable Settings:Input Type: High or Low Level Signal (Selectable Switch) High Level Input Sensitivity: 2.5V - 40VLow Level Input Sensitivity: 90mV - 10V Gain: (Knob Variable)Low Pass Filter: 40Hz - 180Hz (Knob Variable)Subsonic Filter: 0Hz - 50Hz (Knob Variable)Frequency: 30Hz - 80Hz (Knob Variable)Bass Boost: 0dB - 12dB @ 50Hz (Knob Variable) Features:Includes Remote Bass Control Knob with Power Indicator LEDIncludes HA-EASY Speaker Wire to RCA Adapter to Simplify InstallationCompatible with both Aftermarket and Factory Source with DC Offset FeatureWhen DC Offset Feature is used Remote Terminal becomes a 12V Output to Turn On Another DeviceBrushed Aluminum Case with Light Up Blue LED Harmony LogoPower and Protection Lights to Easily See Amp Status Review: Harmony Audio is no joke Review: 👍 ## Features - IMPRESSIVE 800-WATT PEAK OUTPUT: Delivering an impressive 800W peak power, this amplifier ensures a robust and clear audio performance, effectively driving your speakers and subwoofers for an enhanced in-car audio experience. - OPTIMAL 1-OHM PERFORMANCE: Engineered for peak performance, this amplifier maintains stability at a 1-ohm impedance, ensuring a reliable and consistent power supply to your subwoofer for deep and resonant bass. The included dedicated bass remote offers hands-on control, allowing precise tuning of the audio output to meet your preferences and musical demands. - ADVANCED POWER HANDLING: Overcome the difficulty of identifying a switched 12-volt wire with Harmony Alloy Amplifiers. Utilize DC voltage offset or the standard 12-volt switched remote turn-on lead to regulate the amplifier, ensuring adaptability and straightforward functionality. - INNOVATIVE DAISY CHAIN FEATURE:Lead the way with the pioneering daisy chain attribute, allowing for the connection of a second Harmony amplifier or accessory. By utilizing the empty remote terminal as a 12-volt switched output, it introduces opportunities for managing extra devices with low amperage triggers, enhancing the depth of your musical enjoyment. - REMOTE BASS CONTROL: Enjoy convenient bass adjustments from the driver's seat with the included Bass Remote Controller. Featuring a 0 to 12 dB boost range and a blue LED status light, it allows precise tuning and quick visual confirmation of the amplifier's status. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08CJ3SPCL | | Brand Name | Harmony Audio | | Country of Origin | USA | | Customer Reviews | 4.3 out of 5 stars 297 Reviews | | Item Dimensions | 33.6 x 20.6 x 11.3 Centimeters | | Item dimensions L x W x H | 33.6 x 20.6 x 11.3 Centimeters | | Manufacturer | Harmony Audio | | Material Type | Aluminum | | Maximum Supply Voltage | 14.4 Volts (DC) | | Minimum Supply Voltage | 12 Volts (DC) | | Model Number | HA-A400.1 | | Mounting Type | Surface Mount | | Number of Channels | 1 | | Output Power | 400 Watts | | Package Type Name | box | | Specification Met | Oem | | Voltage | 14.4 Volts (DC) | ## Product Details - **Item dimensions L x W x H:** 23.5 x 8.4 x 4.5 inches - **Manufacturer:** Harmony Audio - **Maximum Supply Voltage:** 14.4 Volts - **Minimum Supply Voltage:** 12 Volts - **Voltage:** 14.4 Volts (DC) ## Images ![Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - includes Bass Remote - Image 1](https://m.media-amazon.com/images/I/71cqBcITemL.jpg) ![Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - includes Bass Remote - Image 2](https://m.media-amazon.com/images/I/613F2qCsDSL.jpg) ![Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - includes Bass Remote - Image 3](https://m.media-amazon.com/images/I/71bG8QpVmkL.jpg) ![Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - includes Bass Remote - Image 4](https://m.media-amazon.com/images/I/71DcmNRLFwL.jpg) ![Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - includes Bass Remote - Image 5](https://m.media-amazon.com/images/I/81+zO9RParL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Harmony Audio is no joke *by B***S on 3 May 2023* ### ⭐⭐⭐⭐⭐ 👍 *by T***R on 4 December 2025* ### ⭐⭐⭐⭐⭐ Replacement for my factory amp in 01 Impala *by J***. on 13 November 2024* ## Frequently Bought Together - Harmony Audio HA-A1500.1 Car Stereo Class D Amp Mono 3000 Watt Subwoofer Amplifier - 1 Ohm Stable - Includes Bass Remote - Harmony Audio HA-AK0 Car Stereo Complete 1/0 Gauge 3000W Amp Amplifier Install Kit - Nickel Plated - TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing --- ## 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.co.th/products/515111238-harmony-audio-ha-a400-1-car-stereo-class-d-amp](https://www.desertcart.co.th/products/515111238-harmony-audio-ha-a400-1-car-stereo-class-d-amp) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-30*