- Home Page /
- Electronics /
- Car & Vehicle Electronics /
- Car Electronics /
- Car Audio /
- Amplifiers /
- Multichannel Amplifiers /
- 4 Channel Amp 800 Watt Full-Range Car Amplifi...
0 ratings
Item #:
222757481
4 Channel Amp 800 Watt Full-Range Car Amplifier Harmony Audio HA-A400.4
87% of respondents would recommend this to a friend
Item #:
222757481
€ 137
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Wednesday, October 07
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
Power, Performance and Easy Installation
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step 1 Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Powerful Output
Delivers 800W total power, ensuring high-quality audio for both speakers and subwoofers, enhancing the in-car listening experience for music enthusiasts.
4 Channel Design
Flexible 4 channel setup supports multiple configurations, allowing users to connect various speakers or subwoofers, accommodating different audio preferences.
Durable Build
Constructed with high-quality alloy, this amplifier boasts longevity and resistance to wear, making it a dependable choice for vehicle audio systems.
Product Details
| Voltage | 12 volts |
| Maximum Supply Voltage | 12 volts_of_direct_current |
| Minimum Supply Voltage | 12 volts |
| Mounting Type | Surface Mount |
| Number of Channels | 4 |
| Package Type Name | box |
| Maximum Output Power | 800 watts |
| Item Dimensions | 10.34 x 8.06 x 4.44 inches (26.3 x 20.5 x 11.3 cm) |
| Material Type | Alloy |
| Specification Met | Amazon's Standards |
| Manufacturer | Harmony Audio |
| Model | 6f81e1d8-4414-4c51-9b33-6e7e84c77b9e |
| Brand Name | Harmony Audio |
| Number of Items | 1 |
| Unit Count | 1 Count |
| Item Highlight | Powers door speakers or a subwoofer, alloy build, clean sound for daily driving, easy stereo system upgrade |
| Item dimensions L x W x H | 10.34 x 8.06 x 4.44 inches (26.3 x 20.5 x 11.3 cm) |
Who Should Buy?
-
Budget Audio Enthusiasts
Ideal for users seeking quality audio performance at an affordable price without sacrificing too much power.
-
DIY Car Audio Installers
Great for hobbyists who want to build or upgrade their car audio systems with manageable installation requirements.
-
Compact Vehicle Owners
Perfect for those with limited space needing a powerful yet compact amplification solution for car audio.
-
High-End Audiophiles
May not meet the demands of discerning listeners looking for ultimate fidelity and performance from their amplifiers.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What are the key features of the Harmony Audio HA-A400.4 Car Stereo Alloy Amp?
Answer: The Harmony Audio HA-A400.4 is a powerhouse 4-channel amplifier designed to enhance your car's audio experience. With a maximum output of 800W, it is versatile enough to drive both full-range speakers and subwoofers. Its alloy construction ensures durability while also providing efficient heat dissipation. This amplifier features variable crossovers, allowing you to customize your sound settings for optimal performance. Ideal for car audio enthusiasts looking to boost their sound quality, this amp is perfect for concerts on the road or daily commutes. -
Question:
How does the Harmony Audio HA-A400.4 perform with subwoofers?
Answer: The HA-A400.4 is exceptionally effective when paired with subwoofers. With its robust power output, it is capable of handling the demanding low frequencies without distortion, providing deep bass for an immersive listening experience. The variable crossover feature allows you to fine-tune the frequencies sent to your subwoofers, ensuring they work harmoniously with your main speakers. This makes it an excellent choice for those looking to create a dynamic sound system that can deliver both clarity and power during car audio competitions or casual listening. -
Question:
Is the Harmony Audio HA-A400.4 suitable for all car audio systems?
Answer: Yes, the Harmony Audio HA-A400.4 is designed to be compatible with a wide variety of car audio systems. Whether you have a basic setup or a more advanced system with multiple components, this amplifier can enhance your sound output. Its adjustable settings and flexible power options enable integration into various configurations. This makes it an ideal choice for both newcomers seeking to enhance their first install, or seasoned enthusiasts upgrading their existing systems for better sound quality. -
Question:
What is the installation process for the HA-A400.4 amplifier?
Answer: Installing the Harmony Audio HA-A400.4 amplifier generally requires basic car audio installation knowledge. It involves securely mounting the amplifier in an accessible location, connecting power and ground wires, and linking the input/output cables to your audio system. Proper installation ensures safety and optimal performance. Having an understanding of your car’s electrical system and using appropriate tools can facilitate a smoother installation process. This means you can enjoy customized audio quality in your vehicle without any hassle. -
Question:
What type of speakers work best with the Harmony Audio HA-A400.4?
Answer: The Harmony Audio HA-A400.4 is versatile enough to work with a variety of speakers. It pairs excellently with full-range speakers that require significant power input for superior sound clarity and dynamic range. Additionally, it is also well-suited for subwoofers that demand robust amplification. By combining different types of speakers, users have the potential to create a balanced sound signature that meets their personal audio preferences, whether they enjoy hip-hop bass lines or rock guitar riffs. -
Question:
What are the dimensions of the Harmony Audio HA-A400.4 amplifier?
Answer: The dimensions of the Harmony Audio HA-A400.4 amplifier are compact, making it easier to fit into various locations in your vehicle without compromising space. Despite its small footprint, it manages to deliver powerful audio performance. Its design allows for flexibility in installation, meaning you can place it under seats, in the trunk, or in the dashboard without worry. Users often choose this model for its great performance-to-size ratio, especially when space is at a premium. -
Question:
What kind of power supply is required for the HA-A400.4 amplifier?
Answer: The Harmony Audio HA-A400.4 amplifier requires a 12V power supply and comes with connection terminals that accommodate standard automotive wiring. Adequate power delivery ensures that the amplifier functions correctly and provides maximum output without issues. It is important to ensure your car’s electrical system can support this amp, especially if other components are also drawing power. Proper wiring and power management are crucial for sustaining high-quality audio performance during play. -
Question:
How does the heat management work in the HA-A400.4?
Answer: The Harmony Audio HA-A400.4 features an alloy casing that is designed to dissipate heat effectively during operation. This is essential for preventing overheating, which can lead to performance degradation and potential damage to the amplifier. Adequate ventilation should be considered during installation; keeping the amp in an open area will further improve its cooling efficiency. Maintaining optimal operating temperatures ensures long-term reliability and enhances overall audio output. -
Question:
Can I connect multiple amplifiers to my sound system with the HA-A400.4?
Answer: Absolutely! The Harmony Audio HA-A400.4 is designed to be compatible with multi-amplifier setups. Users can easily integrate it alongside other amplifiers to manage different frequency ranges or add more power to their system. This versatility allows for a customized sound experience where you can tailor the output according to your audio preferences. Many audiophiles create complex systems utilizing multiple amps to achieve unparalleled sound depth and clarity in their vehicles. -
Question:
Where can I buy the Harmony Audio HA-A400.4 Car Stereo Alloy Amp in Aland Islands?
Answer: You can buy the Harmony Audio HA-A400.4 Car Stereo Alloy Amp from Ubuy. Ubuy offers a convenient platform for purchasing this amplifier, providing you with a smooth buying experience. Their extensive inventory includes various car audio products, making it easy to find what you need. With user-friendly navigation and secure payment options, Ubuy is a trusted choice for enhancing your car audio system in Aland Islands.
Harmony Audio Multichannel Amplifiers Editorial Review
4 Channel Amp 800 Watt Full-Range Car Amplifier Harmony Audio HA-A400.4 is a compact yet powerful amplifier designed to enhance your audio experience. Many users have praised its ability to drive various speakers while delivering crystal clear sound quality, making it perfect for daily driving, whether powering door speakers or a subwoofer. Weighing just a bit over 10 inches long, it’s easy to mount and fits into smaller spaces, yet it reliably outputs up to 800 watts without overheating. Customers have noted its remarkable performance even under demanding conditions, highlighting its durability and sound clarity which sets it apart from more established brands.
Customer Reviews & Ratings
53 customers ratings
-
5 Star
71%
-
4 Star
10%
-
3 Star
4%
-
2 Star
2%
-
1 Star
13%
Review this product
Share your thoughts with other customers
Pros
- Compact design fits in tight spaces
- Delivers up to 800 watts power
- Crystal clear sound quality
- Durable build with alloy material
- Easy upgrade for stereo systems
Cons
- May get warm after prolonged use
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
AG
Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
H
Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
O
Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
AC
Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
€ 137
Order now and get it around Wednesday, October 07
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Alloy series amplifiers with options to connect to factory or aftermarket radio source
- Includes HA-EASY adapter for easy installation with factory audio source
- 1 Ohm Stable mono block amps with maximum power output
- Class D circuitry keeps amp running cool with maximum power efficiency
- Includes bass remote for convenient bass adjustment from the driver's seat
- Unique feature of using empty remote terminal to control 2nd amp or accessory
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.