Zero Guesswork · DISCO Connect
Find your PTT — DISCO Connect
Constant Able accepts U-174 for NATO or Peltor wired headsets—high or low impedance, auto switch. Match CA, U-94, or speaker mic to your radio connector. Swap audio accessories when over-the-ear is over the top.
Match your radio
Loading connectors…
Do you run dual-comm / two radios?
Which dual architecture?
Search your radio
Headset (optional)
Constant Able by radio connector
Each row is a product we stock today. One radio interface per Constant Able unit — pick the connector that matches your radio. For older U-94 options or something not listed, contact us.
| Code | Radio family (examples) | Product | From |
|---|---|---|---|
| M9 | APX 6000/7000/8000 class, many XPR GCAI, SRX 2200 | CA - M9 Motorola GCAI | $335 |
| M16 | APX N30/N50/N70, MOTOTRBO R7/Ion, MXP600 | CA - M16 Mini GCAI | $399 |
| M4 | XTS, HT1000, MTS2000 side connector | CA - M4 XTS | $305 |
| M11 | MotoTRBO Slim (SL / XPR3300 class) | CA - M11 Slim | $299 |
| M3 | GP328+/HD1 multipin class | CA - M3 | $299 |
| K1 | Kenwood 2-pin, Baofeng UV-5R class | CA - K1 Kenwood 2-Pin | $250 |
| K2 | Kenwood universal / NX5000 class | CA - K2 | $299 |
| HA2 | Harris XL-185/200, XG-100 UDC | CA - HA2 | $335 |
| HA1 | Harris XG-75 / P7300 15-pin UDC | CA - HA1 | $335 |
| NATO | PRC-152 / PRC-148 6-pin (accessory voltage required) | CA - NATO 6-pin | $399 |
| H4 | Hytera 13-pin | CA - H4 | $305 |
Browse all Constant Able Speaker mics U-94 options
Guides by radio family
Popular combinations
APX / XPR GCAI + any U-174 headset
Constant Able M9 · auto impedance
APX N-Series / R7 + AMP
Constant Able M16 mini-GCAI
PRC-152 / 148 + ComTac
Constant Able NATO 6-pin · set accessory voltage
Harris XL-200
Constant Able HA2
Baofeng / Kenwood 2-pin
Constant Able K1
Patrol (speaker mic only)
Modular speaker mic — M9 (Motorola GCAI)
Frequently asked questions
What PTT do I need for Motorola APX radios?
Classic APX / XPR GCAI radios use Constant Able M9. Newer APX N-Series and MOTOTRBO R7 use Constant Able M16 mini-GCAI — a different connector. Do not assume one Motorola PTT fits both families.
Can one Constant Able work with any radio?
No. Each Constant Able is built for one radio accessory connector. The headset jack is universal U-174/U with auto dynamic/electret sensing. Swap headsets freely; change radio plugs and you need a different CA model.
Dynamic vs electret — do I need an amplified PTT?
Dynamic mics need amplification on legacy U-94. Constant Able auto-senses dynamic and electret so you do not pick amp vs non-amp for most setups.
NATO vs Peltor wiring on U-174?
Legacy U-94 expects US NATO wiring. European “Peltor wired” headsets often fail on plain U-94. Constant Able handles both wiring standards.
What about PRC-152 / PRC-148?
Use Constant Able NATO (U-329/U 6-pin). Enable accessory voltage (3.3V+) and set mic to Lapel Mic. Many manpack PRC-117-class radios lack accessory voltage — confirm before ordering or contact DISCO32.
Dual radios — one PTT or two?
Dual mono (left/right monaural downleads) often needs two Constant Able units. Stereo / 5-pole / MPU5 / PRC-163 dual paths are not a single mono CA. Call or email sales if you run two radios or a stereo dual-platform headset — we’ll map the right path.
Still not sure?
Email help@disco32.com or call (910) 759-6900 with radio model and photos of the radio jack and headset plug. Department and agency quotes available.