AK45 Stereo Audio Amplifier, 300 W 2‑Channel Wireless Bluetooth 5.0 Power Amplifier System
If you’re hunting for an ultra‑budget stereo amp that still packs a punch, the AK45 Stereo Audio Amplifier might surprise you.
It’s tiny, cheap, but loaded with features: Bluetooth 5.0, FM radio, USB/SD inputs, bass and treble knobs, and even a remote. For less than a flash drive, it claims up to 300 W peak output. Is it a magic bargain or just noise? Let’s dig in.
Key Features & Specifications
- Power & Size – Rated at around 40 W × 2 RMS but claimed to reach up to 300 W peak for short bursts. Works only with passive speakers (not active/self‑powered).
- Bluetooth 5.0 – Offers better stability and less noise, with a range quoted at up to 30 ft (10 m) in open space (closer for TVs or PCs).
- Multiple Inputs – USB port and SD card slot let you plug in audio files; also supports RCA AUX, FM radio (auto-tunes up to 32 stations), and microphone input on some variants.
- Tone Control – Front‑panel knobs for volume, bass, and treble, plus a small remote that covers basic controls (mode switching, volume, FM scan).
- Form Factor – Compact footprint (~7 × 14 × 3 inches), weighing under 2 pounds, easy to tuck into a bookshelf or tiny audio setup.
Real User Feedback (Pros & Cons)
Here’s what hands‑on users and Redditors had to say:
✅ Pros
- Surprisingly strong output: Reddit users reported driving multiple small speakers and even a subwoofer, sometimes having to dial back volume to avoid overpowering them. One user said “it made my sub thump like it never has before.”
- Multi‑format versatility: Switching between Bluetooth, FM, USB, SD, AUX, and mic is seamless. Even Bluetooth control functions like skip/pause typically work.
- Good clarity at low to moderate volume: Clean, crisp sound up to mid-levels. Commenters appreciated its surprising clarity given the price.
⚠️ Cons
- Audible hum or static: Many users cited a low hum in Bluetooth or AUX modes, which usually fades once music plays. Some described a faint noise even when idle or unplugged.
- Volume knob is sensitive: Users warned that turning it past a low threshold can blast sound unexpectedly—use input volume wisely and turn knob gently.
- Build quality typical for price: Lightweight plastic feet, no grip pads, and simple construction. Functional but not premium.
- Durability concerns: Given the low cost, some expect it may not last many years—one user said they’d be impressed if it lasted five months.
Comparison With Similar Budget Amps
| Product | Approx. Price | Power Rating | Bluetooth | Inputs | Notable Differences |
|---|---|---|---|---|---|
| AK45 (Daakro) | ~$30 | 40 W ×2 RMS / 300 W peak | BT 5.0 | USB, SD, FM, AUX, MIC | Very cheap, small, multi‑input, hum issue |
| Fosi Audio BT20A | ~$50–60 | ~100 W ×2 | BT 5.0 | RCA, AUX, no SD/FM | Cleaner amplifier chip, slightly better fidelity |
| Romicta 4‑channel 50 W×4 | ~$40–50 | 200 W total | BT 5.0 | USB, SD, FM, mic inputs | 4‑channel support, karaoke features, more power for more speakers |
If you need simple stereo and very basic FM/USB playback, AK45 covers it at ultra budget. But if you want cleaner sound, support more speakers, or stereo fidelity above hobby level, pricier mini amps like Fosi often deliver better performance.
Verdict & Who’s It For?
If you’re looking for a novelty budget amp to power small passive speakers for casual listening, FM radio, karaoke practice, or as a stop‑gap system, the AK45 delivers surprising value. Its multi‑format support and compact size make it useful in bedrooms, small offices, garage setups, or secondary rooms.
However, it comes with trade‑offs: a light hum, sensitive volume knob, and modest build quality. It’s definitely not for audiophiles, vinyl enthusiasts, or permanent home-theater installations. Consider it a starter amp: functional, feature‑rich for the price, but far from high-end longevity.
Recommended for:
- Beginners seeking entry-level stereo power on a tight budget
- Those wanting USB/SD/FM/Bluetooth in one compact package
- Light‑to‑moderate volume listening in small spaces
Not recommended for:
- High-fidelity listening or critical audio setups
- Users wanting rugged build or long-term reliability
- Loud parties or powered speaker systems where noise matters
Final Thoughts
This little AK45 amp is like a jack‑of‑all‑trades for under thirty bucks. It won’t wow you with audiophile clarity—but if you need something that does Bluetooth, FM, USB, SD, AUX, and mic inputs in a space‑saving package, it’s hard to beat. Just mind the volume knob, expect a low hum, and don’t expect decades of trouble‑free use.
For casual users or household hobbyists, it’s a surprising performer. Just don’t plan on it replacing a serious amplifier anytime soon.
