FiiO FD11 IEM Review: Single Dynamic Driver Excellence on a Budget

FiiO FD11 has 20,000+ reviews on JD.com with a 4.4/5 rating at ¥99 ($14). Users appreciate the all-metal build quality that feels premium well beyond the price, the warm engaging sound signature with satisfying bass punch, and the detachable 0.78mm 2-pin cable that allows for future upgrades. The main complaints are the stock cable that’s stiff and retains coiling memory, and the larger-than-average housing that can cause fit issues for users with smaller ears. Conclusion: ✅ Worth Buying — the best metal-build budget IEM under ¥100 with excellent sound value.

Introduction

FiiO is well-known in the audiophile community for their DACs, amplifiers, and earphones. The FD11 is their entry-level single dynamic driver IEM, competing in the ultra-competitive sub-¥100 segment against the Moondrop Chu 2, 7Hz Zero 2, and Truthear Gate.

At ¥99 ($14), the FD11 offers something unique at this price — a full metal shell machined from zinc alloy. Based on 20,000+ JD reviews and community feedback from audiophile forums, we evaluate whether the FD11 is the best sub-¥100 IEM for those who prioritize build quality.

Specifications

Feature	FiiO FD11	Moondrop Chu 2	7Hz Zero 2	Truthear Gate
Price (JD)	¥99 ($14)	¥69 ($10)	¥89 ($12)	¥99 ($14)
Driver	10mm DLC dynamic	3.5mm composite DD	10mm dynamic	10mm dynamic
Housing	Zinc alloy (metal)	Zinc alloy (metal)	Resin (plastic)	Resin (plastic)
Cable	Detachable 0.78mm 2-pin	Fixed cable	Detachable QDC 2-pin	Detachable 0.78mm 2-pin
Impedance	24Ω	24Ω	27Ω	32Ω
Sensitivity	112dB	120dB	114dB	110dB
Frequency	20Hz-20kHz	20Hz-40kHz	10Hz-20kHz	20Hz-20kHz
Weight	8g per side	4g per side	5g per side	5g per side
JD Rating	4.4/5	4.3/5	4.5/5	4.1/5
JD Reviews	20,000+	50,000+	10,000+	5,000+

Design and Build Quality

The FD11’s zinc alloy shell is the standout feature. It’s machined with a brushed metal finish that looks and feels like a ¥300+ IEM. The build quality is exceptional for ¥99 — there’s no plastic anywhere on the housing. The metal gives each earbud satisfying heft (8g each) and feels cold to the touch initially.

The downside of the metal build is the weight. At 8g per earbud, the FD11 is noticeably heavier than resin/plastic competitors like the 7Hz Zero 2 (5g). Most users find them fine for stationary listening, but they can feel heavy during extended mobile use or lying down.

The included cable is detachable with 0.78mm 2-pin connectors — a standard that’s easily upgradeable. However, the stock cable is stiff and retains the coiled shape from packaging. It’s the most common complaint in JD reviews.

“The build quality on these is insane for ¥99. I own IEMs costing ¥500+ and the FD11 feels more solid than some of them. The metal shell has a premium weight and the machining is flawless. The cable is terrible though — I replaced it with a ¥30 upgrade cable and it’s now perfect.” — JD.com user

Performance

The FD11 uses a 10mm DLC (Diamond-Like Carbon) dynamic driver, a technology usually found in more expensive IEMs. The result is a warm, engaging sound signature with excellent bass quality. The low-end is punchy and well-controlled — not overwhelming but with satisfying impact and good texture.

Mids are slightly recessed which gives a sense of space but can make vocals feel less intimate than on the Chu 2. The treble is smooth and non-fatiguing, with good extension without sibilance. The soundstage is decent for a single dynamic driver — wider than the Chu 2 but narrower than multi-driver IEMs at higher prices.

The FD11 is easy to drive at 24Ω/112dB sensitivity. It sounds great straight from a phone dongle, but scales well with a better source. With a budget DAC like the FiiO KA11, the soundstage widens and detail improves noticeably.

“The FD11 is my daily driver now. The bass has real authority — not boosted but well-extended. I listen to a lot of jazz and acoustic music and the timbre is natural and organic. With my FiiO KA1 dongle, the soundstage opens up nicely. Replaced the stock cable with a braided one and it’s a ¥99 IEM that sounds like ¥300.” — JD.com user

User Reviews by Theme

Build Quality

“The metal shell is what sold me. I’ve dropped these twice and they don’t have a scratch. The finish is beautiful — looks like a much more expensive IEM. They’re heavier than resin IEMs but that’s the trade-off for metal build quality.” — JD.com user

💡 Summary: Zinc alloy build quality is exceptional for the price and significantly surpasses resin competitors.

Stock Cable Issues

“The cable is the only weak point. It’s very stiff and keeps the coiled shape from the box. The memory wire around the ear is also stiff and uncomfortable. I spent ¥25 on a replacement cable and now these are perfect. Factor in a cable upgrade when budgeting.” — JD.com user

💡 Summary: The stock cable is universally criticized as stiff and tangly — a cable upgrade is recommended.

Sound Quality

“Warm, musical, and engaging. The bass has real texture and body without bloat. Vocals are a bit recessed compared to my Chu 2, which takes some getting used to. Treble is smooth and non-fatiguing — I can listen for hours without ear fatigue. Great for rock, jazz, and acoustic.” — JD.com user

💡 Summary: Warm and engaging sound with excellent bass quality and smooth treble — great for long listening sessions.

Fit Issues

“The FD11 is quite heavy and bulky. They stick out of my ears more than my Chu 2. Lying down, they’re uncomfortable. For desktop listening they’re fine, but for commuting or sleeping, the 7Hz Zero 2 is more comfortable.” — JD.com user

💡 Summary: Larger metal shells and heavier weight cause fit issues for some users, especially for mobile or reclined use.

Purchase Recommendations

✅ Worth Buying (¥99)

Best for desktop listeners who value premium build quality and warm, engaging sound. The metal construction and detachable cable make it a great foundation IEM that can be improved with cable upgrades. Excellent for jazz, rock, acoustic, and vocal music.

⚠️ Consider Chu 2 (¥69) for Budget Priority or 7Hz Zero 2 (¥89) for Comfort

If ¥99 is already stretching your budget, the Moondrop Chu 2 at ¥69 offers better vocal clarity and a lighter build. If comfort for extended wear or mobile use is critical, the lighter resin 7Hz Zero 2 is more practical despite the plastic build.

Pros & Cons

✅ Pros	❌ Cons
Premium zinc alloy metal build	Heavy at 8g per earbud
Warm, engaging sound signature	Stock cable is stiff and poor quality
Detachable 0.78mm 2-pin cable	Bulky housing for small ears
DLC driver with excellent bass	Recessed mids — less intimate vocals
Good soundstage for single DD	No carrying case included
Easy to drive from any source	3.5mm jack — USB-C version would be nice

FAQ

Q: How does the FiiO FD11 compare to the Moondrop Chu 2? A: The FD11 has better build quality (metal vs metal) and warmer, more engaging sound. The Chu 2 has more vocal-forward mids, a lighter build, and is ¥30 cheaper. If build quality and bass quality matter, get the FD11. If budget and vocal clarity matter, get the Chu 2.

Q: Is the FD11 good for gaming? A: For casual gaming, yes. The warm sound signature works well for game immersion. For competitive FPS gaming, the slightly recessed mids and warm tuning make footsteps slightly less distinct than with brighter-tuned IEMs like the 7Hz Zero 2.

Q: Can I drive the FD11 from a smartphone? A: Yes, easily. The 24Ω impedance and 112dB sensitivity mean it gets plenty loud from any phone’s 3.5mm output or USB-C dongle. A budget dongle DAC like the Apple dongle or FiiO KA1 will improve sound quality.

Q: What cable upgrade do you recommend? A: Any budget 0.78mm 2-pin cable in the ¥20-50 range is a significant upgrade. Tripowin Zonie, NiceHCK, and FiiO’s own RC-42 are popular options. The upgrade will improve comfort, reduce microphonics, and eliminate the cable memory issue.

Q: Do they come with ear tips? A: Yes, the FD11 includes three sizes of silicone ear tips (S/M/L) and a pair of foam tips. The stock silicone tips are average — many users replace them with SpinFit or Moondrop Spring Tips for improved comfort and seal.