Cayin C9 Portable Headphone Amplifier - Excellent - Verified by HiFiLoop
The Audiophile's Hook
The Cayin C9 is a true flagship portable headphone amplifier built for “choose-your-flavor” listening: switch between Tube and Solid-State timbre, then fine-tune with Class A / Class AB to match your headphones and mood. This Excellent (98% new) bundle delivers reference-grade drive and flexibility at used-market value—verified by HiFiLoop.
Condition Report (The Truth)
Excellent / Well-Cared For: Very clean overall, lightly used, and handled with care.
- Bare unit bundle (no retail box unless shown in photos).
- No obvious cosmetic defects observed.
- Included: two interconnect cables + USB-C charging cable + battery set.
Mandatory: The device has passed all functional tests.
Sonic Signature & Pairing
C9 is all about control and customization. Tube mode adds a more organic bloom and dimensionality, while Solid-State keeps edges tight and images sharply outlined. Class A emphasizes density and smoothness; Class AB leans punchier and more efficient—ideal for longer portable sessions.
To unleash the full potential of this device, we recommend pairing it with gear from our Headphones Collection.
Technical Highlights (Mobile-Table)
| Timbre Modes | Tube (dual KORG Nutube 6P1) / Solid-State |
| Amplifier Modes | Class A / Class AB (instant switching) |
| Inputs | 3.5mm single-ended + 4.4mm balanced |
| Outputs | 3.5mm single-ended + 4.4mm balanced (supports BAL↔SE optimization) |
| Power System | Removable battery module; 4× user-replaceable 18650 cells |
| Charging | USB-C charging |
| Size | 160 × 80 × 28 mm |
What's in the Box
- Cayin C9 portable headphone amplifier (bare unit)
- Portable interconnect cable(s) (as included in your bundle)
- USB-C charging cable
- Battery set (4× 18650 cells)
Why Buy Used from HiFiLoop?
- ✅ 14-Day DOA: Full refund/replace if dead on arrival.
- 🔧 180-Day Warranty: Free repair service (buyer pays return shipping).
- 🔬 Lab Tested: I/O integrity, noise floor, and channel balance verified.
- 📦 Free Shipping: Orders over $199.
See full Grading Scale in Footer Condition Guide.
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Condition Report
See details in the description above.
Shipping & Warranty
Processing Time:
Please allow 3-5 business days for order processing. We perform a final rigorous audio test, functional inspection, and deep cleaning to ensure the device is in perfect condition before dispatch.
Shipping Method:
We use reliable International Priority Lines. Tracking numbers are provided once the item is dispatched.
Estimated Delivery:
7-15 business days to most destinations (USA, Europe, etc.).
Warranty & Support:
We stand behind our quality with a 180-Day Warranty.
- 0-14 Days: Full refund or replacement for any functional defects upon arrival.
- 15-180 Days: Free repair service for hardware issues (Buyer is responsible for return shipping costs and any applicable customs duties or taxes).
Tech Specs
Refer to official manufacturer specifications.