Stereo Amplifier Home Audio Receiver AK-390 - Compact 400W+400W HiFi

In this review of the AK-390 mini stereo amplifier the bottom line is straightforward: this is a compact, HiFi-focused receiver for people who want substantial power in a small package and multiple input options. The reviewer found the unit especially well suited to small flats, bedrooms and informal party setups because it delivers a claimed 400W + 400W peak capability, reliable Bluetooth 5.0 connectivity, and front-panel mic input for casual karaoke. Its size and straightforward controls make it a practical upgrade for passive speaker setups without taking much shelf space.

Key Features

• High power output: The upgraded board and transformer design provide a robust power profile, supporting up to two 4-16 ohm passive speakers and strong volume headroom for small to medium rooms.
• Bluetooth 5.0: Built-in Bluetooth 5.0 pairs quickly with phones and tablets with minimal audible pop or connection noise for uninterrupted wireless streaming.
• Multiple inputs: Bluetooth, AUX, USB, RCA and a microphone input give flexible connection options for CD, TV, PC and media players and make the amp useful for parties and simple PA use.
• Tone controls and remote: Dedicated volume, treble and bass knobs plus a remote control allow on-the-fly fine-tuning of sound character from across the room.
• Karaoke and FM: The front mic input supports casual karaoke sessions and FM radio adds a simple broadcast source without extra gear.

Who It's For

The AK-390 is aimed at homeowners and renters who want clear, powerful sound from passive speakers without a large rack amplifier; it fits well on a bookshelf or in a small AV cabinet. It is also a solid option for hobbyists who need a compact amplifier for basement, garage or small party use and who value multiple input modes including Bluetooth and USB.

Those who should look elsewhere include listeners seeking audiophile-grade separates or studio monitors for critical listening, and buyers who need extensive digital room correction or network streaming services built into the amplifier.

Pros & Cons

Pros

• High claimed power output that provides strong drive for two passive speakers in small to medium spaces.
• Reliable Bluetooth 5.0 connection with low noise and convenient wireless playback.
• Versatile input set including mic and FM makes it a flexible choice for parties and casual karaoke.
• Compact footprint that does not dominate a shelf or AV cabinet.

Cons

• Not intended as a high-end audiophile reference or for critical studio use where precision monitoring is required.
• Specifications use peak or maximum power phrasing which may not reflect continuous RMS output for some setups.

Specifications

Channels	2.0 stereo
Rated power	400W + 400W (peak rating)
Speaker compatibility	4-16 ohm passive speakers
Inputs	Bluetooth 5.0, USB, AUX, RCA, Mic
Controls	Volume, treble and bass knobs; included remote
Functions	Karaoke mic input and FM radio
Size	Approx. 7.0 x 14 x 2.8 in

Our Verdict

The AK-390 is a strong value for users who want a compact, powerful stereo amplifier with modern wireless convenience and flexible inputs. It pairs well with bookshelf or tower passive speakers for home, office or small party use and adds karaoke and FM options for casual entertainment; those seeking precision studio gear or integrated streaming platforms should consider other classes of equipment.

Frequently Asked Questions

Can this amp drive two bookshelf speakers?
Yes, it is designed for two 4-16 ohm passive speakers and offers sufficient power for small to medium rooms.

Does Bluetooth 5.0 have audible connection noise?
The unit uses Bluetooth 5.0 and is reported to pair without pop or audible noise when establishing a connection.

Is a remote included and does it work out of the box?
A remote is included; remove the isolation plastic sheet at the bottom before first use to enable the battery.