A mini XLR connector (also called TA3F, TA4F, or Tiny QG) is a miniaturized 3-to-5-pin version of the standard XLR, about 10 mm in diameter. It carries balanced audio in space-constrained gear like wireless bodypack transmitters, cinema cameras, and detachable headphone cables. Standard 3-pin wiring follows full-size XLR: Pin 1 = Ground, Pin 2 = Hot (+), Pin 3 = Cold (−).
Replacing a broken cable on your wireless bodypack and unsure which mini connector it uses? Confused why a Shure headset mic won’t work on a Sennheiser pack? Whether you’re repairing a bodypack transmitter or building a custom cable, the mini XLR connector is everywhere in modern audio — yet its varied pin configurations confuse even seasoned engineers. Because mini XLR wiring differs across manufacturers, understanding its pinout, soldering, and real-world uses is essential before you cut a single wire.
What Is a Mini XLR Connector? (TA3F, TA4F & Tiny QG)
The mini XLR connector — technically known as the Tiny QG (TQG) or TA series (such as TA3F and TA4F) — is a scaled-down version of the standard XLR connector. Because compact devices can’t fit a full-size 19 mm XLR, the mini XLR was designed to deliver the same balanced audio capability in a roughly 10 mm body.
These connectors are the industry standard for space-constrained gear. You’ll mainly find them on:
- Wireless bodypack transmitters
- Professional monitoring headphones (detachable cables)
- Cinema cameras
- Lavalier and instrument microphones
Although the mini XLR looks like a shrunken standard XLR, it uses different locking mechanisms and — because the pin spacing is so tight — demands finer soldering technique. For the full-size counterpart, see our XLR connector guide.
Mini XLR vs. Standard XLR: Key Differences
Here is a comparison of the two most common audio interfaces:
| Feature | Standard XLR Connector | Mini XLR Connector |
|---|---|---|
| Size | Approx. 19 mm diameter | Approx. 10 mm diameter |
| Pin Count | Usually 3-pin (up to 7) | 3, 4, or 5-pin common |
| Locking | Latch lock on female | Push-button or threaded |
| Current Handling | Higher | Lower |
| Typical Power | +48V phantom power | 5–10V bias voltage (bodypack) |
| Primary Use | Stage mics, PA speakers | Wireless bodypacks, cameras, headphones |
Because mini XLR connectors are optimized for low-voltage signals, they’re ideal for lavalier microphones powered by a bodypack. Unlike studio mixers that supply 48V phantom power, a bodypack typically provides 5–10V bias voltage. ⚠️ This is a critical distinction: applying full 48V phantom power to a mini-XLR electret lavalier can instantly destroy the capsule.
Mini XLR Pinout: 3-Pin, 4-Pin & 5-Pin Wiring
One of the most common questions: “What’s the pin definition for a mini XLR?” Because these connectors come in 3, 4, or even 5-pin versions, the wiring depends entirely on the device.
Standard 3-Pin Mini XLR (TA3F/TA3M)
The 3-pin TA3 is the most common variant — used in Blackmagic cinema cameras and AKG headphones. Because the TA3 follows the same scheme as a full-size XLR, it genuinely earns the “mini XLR” nickname:
- Pin 1: Ground / Shield
- Pin 2: Hot / Positive (+ signal)
- Pin 3: Cold / Negative (− signal)
⚠️ Although the above is standard for balanced audio, some proprietary wireless systems swap Pin 2 and Pin 3 — before soldering, always check your device manual. For the standard XLR pinout reference, see our XLR connector pinout guide.
4-Pin Mini XLR (TA4F/TA4M)
The 4-pin TA4 is common in Shure, AKG, and Sennheiser-compatible wireless systems. A typical Shure wiring:
- Pin 1: Ground
- Pin 2: +5V bias voltage (powers the mic capsule)
- Pin 3: Audio signal
- Pin 4: Load resistor (sometimes bridged to Pin 3)
⚠️ CRITICAL — TA4 has NO universal standard. Because each manufacturer wires the TA4 differently, a Shure headset mic will NOT work on an AKG or Sennheiser bodypack without a rewired adapter. Before swapping mics between systems, consult the manufacturer’s pinout (e.g., Shure’s official TA4M/TA4F knowledge base) — because mixing incompatible TA4 wiring can damage the capsule or transmitter, never assume cross-brand compatibility. This is the single most common mini-XLR mistake.
5-Pin Mini XLR (TA5F/TA5M)
Although less common, the 5-pin TA5 appears in dual-channel applications — stereo lavalier setups, certain in-ear monitor systems, and specialized broadcast gear. A typical configuration carries two balanced audio channels plus a shared ground, though — because TA5 wiring is even less standardized than TA4 — manufacturer documentation is mandatory before wiring.
Tips for Successful Mini XLR Soldering
Because the solder cups on a mini XLR are extremely small, soldering one can be frustrating. These three techniques make it manageable:
- Pre-tin everything. Before connecting any wire to the connector, tin both the wire tip and the solder cup first — this makes the final joint far easier.
- Use a bench vise. Because you can’t hold the iron, solder, wire, and plug simultaneously, securely clamp the connector in a helping-hands jig or PCB vise.
- Use heat-shrink tubing on each conductor. Because the pins sit so close together, a single stray copper strand can short adjacent pins — slide small heat-shrink tubing over each individual conductor before assembly.
5 Key Uses of Mini XLR Connectors
1. Wireless Microphone Systems
This is the connector’s killer application. Virtually all professional wireless bodypack transmitters use a mini XLR to connect a lavalier or headset microphone. Because the connection locks, an actor or presenter won’t accidentally unplug the microphone while moving on stage.
2. Cinema Camera Audio Inputs
As cameras shrank, manufacturers abandoned the bulky standard XLR input. The Blackmagic Pocket Cinema Camera 4K and 6K are famous examples — because the mini XLR delivers balanced, professional audio with phantom power in a fraction of the space, these cameras get pro audio without enlarging the body.
3. Detachable Headphone Cables
High-end studio headphones (such as the AKG K240 or K702) use a 3-pin mini XLR at the earcup. Because the cable detaches, you can replace it when it breaks — rather than buying an entire new headset. When a cable fails after years of use, this design delivers a major sustainability and cost advantage.
4. Instrument Wireless Bodypacks
A guitarist using a wireless system needs a cable from a 1/4″ TS plug (guitar) to a mini XLR (bodypack). Because high-impedance instrument signals must be matched to the transmitter, these adapter cables are usually custom-wired for the specific bodypack.
5. Test & Measurement Microphones
Acoustic engineers use compact measurement microphones connected to portable analyzers. Because the mini XLR keeps the connection small and light, test equipment stays portable for field acoustic measurements.
Mini XLR Troubleshooting: Buzz & Stuck Connectors
Why Is My Audio Buzzing?
When you hear a buzz, it usually points to a grounding problem. Check Pin 1 inside your mini XLR connector. Because a stray shield strand touching Pin 2 or Pin 3 creates noise, confirm the shield is cleanly soldered to Pin 1 and isolated from the other pins.
Why Won’t the Connector Release?
Unlike the standard XLR connector with its latch on the female socket, the mini XLR usually has a small release button on the cable connector itself. Before pulling, press the release button fully. ⚠️ Because forcing a stuck connector can rip the panel socket off the circuit board (PCB), never yank it — a torn PCB socket means an expensive board-level repair.
Frequently Asked Questions
Can I convert a mini XLR to a standard XLR?
Yes — adapter cables are easy to buy or build. A common adapter has a male mini XLR on one end and a female standard XLR on the other. Because this bridges the two formats, you can connect a standard shotgun microphone to a Blackmagic camera or wireless bodypack. For full-size conversions, see our XLR to TRS cable guide.
Is a mini XLR the same as a mini DIN?
No — they’re completely different connectors. Mini DIN is used for S-Video and legacy PS/2 connections. Because the mini XLR is specifically engineered for balanced, shielded audio, the two are not interchangeable despite both being small round connectors.
How long can a mini XLR cable be?
Because the 3-pin version carries a balanced signal, it follows the same physics as a standard XLR cable — you can run 50–100 ft (15–30 m) without significant interference. Although the technical limit is generous, mini XLR cables are usually used for short connections (within 2 m), such as a lavalier to a bodypack.
What’s the difference between TA3F and TA4F?
TA3F is a 3-pin mini XLR; TA4F is a 4-pin mini XLR — and they are not interchangeable. Because the TA3 follows standard balanced XLR wiring, it’s used for cameras (Blackmagic) and headphones (AKG). Because the TA4 carries bias power plus audio, it’s used for wireless bodypacks (Shure, AKG). Before buying a replacement, confirm whether your device uses TA3 or TA4.
Why won’t my Shure headset mic work on a Sennheiser bodypack?
Because TA4 connectors have no universal wiring standard, Shure, AKG, and Sennheiser each wire their bodypacks differently. Even though the connector physically fits, the pin assignments differ — so a Shure-wired mic produces no sound (or fails) on a Sennheiser pack. To cross brands, use a brand-specific rewired adapter cable.
Can mini XLR carry phantom power?
The 3-pin TA3 can carry standard +48V phantom power when wired like a full-size XLR (common in cameras). However, bodypack mini XLR connectors supply only 5–10V bias voltage, not 48V.
⚠️ Because 48V phantom power can instantly destroy an electret lavalier capsule, never connect a bodypack mic to a 48V phantom source.
What is “Tiny QG” or “TQG”?
Tiny QG (often abbreviated TQG) is Switchcraft’s brand name for its mini XLR connector series — functionally equivalent to the TA3/TA4 designations. Because the terms are used interchangeably in the industry, a “TQG” connector and a “mini XLR” connector refer to the same physical part.
Choosing Quality Mini XLR Connectors
Because mini XLR connectors face constant flexing on bodypacks and detachable cables, build quality directly affects reliability. Look for:
- Spring-loaded latches (Switchcraft-style) over sponge-based designs for secure locking
- Silver- or gold-plated contacts for low-resistance, corrosion-free connections
- Robust strain relief — the #1 failure point on constantly-flexed bodypack cables
- Correct series — confirm TA3 vs TA4 vs TA5 and the manufacturer wiring before ordering
Whether you need custom-wired bodypack adapters, replacement headphone cables, or bulk OEM mini XLR assemblies, Verchil manufactures professional connector assemblies to spec. Explore our XLR connector range or contact our technical team for custom mini XLR wiring and bulk quotes.
Conclusion
Because the mini XLR packs balanced audio into a 10 mm body, it’s become indispensable for wireless bodypacks, cinema cameras, and detachable headphone cables. Remember the essentials: the 3-pin TA3 follows standard XLR wiring, the 4-pin TA4 varies by manufacturer (never assume cross-brand compatibility), and bodypacks supply low-voltage bias — not 48V phantom power. Whether you’re repairing a bodypack cable or building a custom adapter, matching the right series and wiring keeps your audio clean and your gear safe.
Browse Verchil’s complete XLR connector range, or explore our companion guides: XLR connector guide, XLR connector pinout, and microphone XLR connector guide. For custom mini XLR assemblies, contact our team.
