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DISCO Connect

PTT by radio

Type a radio or tap one below.

    Two radios? Headset notes?

    How many radios?

    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 MiniTRBO Slim (XPR 3000/3300/3500, DP2000) 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 / P5500 15-pin UDC MSM - HA1 speaker mic $316
    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

    Motorola APX / GCAI (M9)Classic APX · XPR GCAI APX N-Series / R7 (M16)Mini-GCAI Harris XL / HA2XL-185/200 · XG-100 Kenwood / Baofeng (K1)2-pin class PRC-152 / 148 NATO6-pin U-329/U NATO vs Peltor wiringU-174 jack guide

    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.