System Configurator
Impedance Matching // Connector Logic
Find the perfect push-to-talk (PTT) for your radio and headset. Works with Motorola APX, Harris XL, PRC-152, PRC-148, Kenwood, Baofeng, and more. Our Constant Able™ technology automatically matches impedance for Ops-Core, Peltor Comtac, and MSA Sordin headsets.
Headset / Earpiece
Select your primary hearing protection or earpiece to ensure we match the microphone impedance correctly.
Tech Brief: Impedance
Dynamic Mics (Low Imp): Standard for Military headsets (Ops-Core/Peltor). They require amplification.
Electret Mics (High Imp): Standard for Civilian headsets and most Earpieces.
All PTTs below require a standard U-174/U (TP-101) downlead.
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Mission Ready
Loadout Config
Headset / Earpiece
Radio
Technical Breakdown
- Impedance Match: Auto
- Signal Path: Standard
- Connector: U-174
Standard Option: U94 PTT
Basic push-to-talk functionality.
Popular PTT Combinations
Constant Able M9 GCAI
Auto-sensing for APX 6000/7000/8000 with dynamic headsets
View Product →Constant Able M16 Mini GCAI
For APX N-Series and MOTOTRBO R7
View Product →Constant Able 6-Pin NATO
Military 6-pin for AN/PRC radios
View Product →Constant Able HA2
Universal PTT for L3 Harris XL/Unity series
View Product →U-94 Kenwood 2-Pin
Budget-friendly PTT for ham/amateur radios
View Product →Modular Speaker Mic (MSM)
Rugged speaker mic for patrol & duty use
View Product →Constant Able™ Technology
Auto-sensing impedance matching works with ANY headset. No more guessing between amplified vs non-amplified PTTs.
Made in USA
All Disco32 PTTs are designed and manufactured in the United States. Trusted by military, law enforcement, and first responders.
Expert Support
Not sure what you need? Our team has decades of experience in tactical communications. We'll help you get the right setup.
Supported Radios & Connectors
APX 6000, 7000, 8000, N30, N50, N70, R7
XTS 2500, 3000, 5000, HT1000, MTS2000
XL-200P, XL-185P, XG-75, P7300, P5500
PRC-152, PRC-148 MBITR, PRC-117G
PRC-163, PRC-167 Falcon IV
TK Series, NX Series, 2-Pin
UV-5R, BF-888S, UV-9R, UV-82
PD702, PD782, HP600, HP700
F3, F4, V80, F1000, F2000
VX-6R, VX-7R, FT-60R, EVX-S24
SL300, XPR3300, DP2400, DP4600
iPhone, Android, USB-C, 3.5mm
Frequently Asked Questions
What PTT do I need for Motorola APX radios?
What is the difference between dynamic and electret microphones?
Electret microphones (high impedance) are common in civilian headsets like Earmor, Howard Leight, and most earpieces. They produce a stronger signal and don't require amplification.
The Constant Able PTT automatically detects which type you're using and adjusts accordingly—no manual configuration needed.
What PTT works with PRC-152 and PRC-148 military radios?
Important Setup: These radios require 3.3V Accessory Voltage ON and Mic set to "Lapel Mic" in the radio menu. Without these settings, audio transmission will not function correctly.
Do Peltor Comtac headsets work with all PTTs?
The Constant Able PTT handles both impedance matching AND wiring differences automatically. If you have a legacy U-94 PTT with European-wired Comtacs, audio will not work—you'll need either a Constant Able or a wiring adapter.
What connector does my Baofeng UV-5R use?
Note: Waterproof models like the UV-9R, UV-9R Plus, and BF-A58 use a different multi-pin connector and require a specific PTT variant.
What is a U-174/U connector?
Can I use one PTT with multiple radios?
Still Not Sure?
Our team has years of experience with tactical comms. Send us your radio model and headset, and we'll recommend the perfect setup.
Disco32 specializes in push-to-talk (PTT) switches, tactical headset adapters, and communication accessories for military, law enforcement, first responders, and amateur radio operators. Our products are compatible with Motorola APX, Harris, Kenwood, Baofeng, Hytera, Icom, Vertex, and military AN/PRC radios. Whether you need a PTT for Ops-Core AMP, Peltor Comtac, MSA Sordin, or any U-174/U compatible headset, our configurator will match you with the right solution.
Constant Able PTT — Complete Radio Compatibility
The Constant Able PTT works with over 100 radios across every major manufacturer. Auto-sensing impedance matching means it works with any standard NATO-wired tactical headset — Ops-Core AMP, 3M Peltor ComTac, MSA Sordin, TCI Liberator, and more — without manual configuration.
Motorola Solutions
| Radio Models | Connector | Model | Price |
|---|---|---|---|
| APX 1000, 2000, 4000, 6000, 7000, 8000, XPR 6500, 7550, SRX 2200 | GCAI | CA M9 | $335 |
| APX N50, N70, N70XE, Ion, R7, R7a, MXP600, MXP660 | Mini-GCAI | CA M16 | $399 |
| XTS 1500, 2500, 3000, 5000, HT1000, MT2000, MTS2000 | Universal Side | CA M4 | $335 |
| DP2000, 2400, 2600, XPR 3000, 3300, 3500, MTP3250 | MotoTRBO Slim | CA M11 | $335 |
| CP200, GP300, EP450, BPR40, DEP450 | CP/GP 2-Pin | CA M1 | $335 |
| GP320, 328, 338, 380, HT750, 1250, 1550, PRO5150-7750 | Multi-Pin | CA M2 | $335 |
| EX500, 600, GP328+, 338+, HD1, RT29, RT83 | HD1/GP328+ | CA M3 | $335 |
L3Harris
| Radio Models | Connector | Model | Price |
|---|---|---|---|
| P5300, 5400, 5500, XG-75, Unity XG-75, XG-25 | 15-Pin UDC | CA HA1 | $335 |
| XG-100, XL-185, XL-200 | UDC | CA HA2 | $335 |
Military (Harris / Thales)
| Radio Models | Connector | Model | Price |
|---|---|---|---|
| AN/PRC-152, PRC-148 MBITR, PRC-119, PRC-117G, PRC-150 | NATO 6-Pin | CA NATO | $335 |
Kenwood
| Radio Models | Connector | Model | Price |
|---|---|---|---|
| TK-2140, 3140, 3180, NX-200, 300, 5200, 5300 | Kenwood Universal | CA K2 | $335 |
| TK-2100, 3201, Baofeng UV-5R, BF-888S, UV-82 | Kenwood 2-Pin | CA K1 | $250 |
Hytera
| Radio Models | Connector | Model | Price |
|---|---|---|---|
| PD700, 780, 785, 705 | Hytera 16-Pin | CA H3 | $335 |
| PD602, 605, 665, 685, HP600, 680, 700 | Hytera 13-Pin | CA H4 | $335 |
Icom
| Radio Models | Connector | Model | Price |
|---|---|---|---|
| IC-F3, F4, F10, F20 | 2-Pin Standard | CA I1 | $335 |
| IC-A25, IC-F200 | Airband / Waterproof | CA I1A | $335 |
| IC-F3G, F14, F21, F33, V8, V80 | Land Mobile | CA I2 | $335 |
| IC-F1000, F2000, F3001 | 2-Screw | CA I3 | $335 |
| IC-F50, 51, 60, 61, M87, M88 | Multi-Pin | CA I4 | $335 |
| IC-F3262D, F4262D, F4400DS | 14-Pin | CA I5 | $335 |
Vertex / Yaesu
| Radio Models | Connector | Model | Price |
|---|---|---|---|
| VX-6R, VX-7R, EVX-S24 | 3.5mm Single | CA Y4 | $335 |
Compatible Headsets
The Constant Able PTT uses auto-sensing impedance matching and works with any headset using a standard U-174/U (TP-120) NATO connector:
- 3M Peltor ComTac VI
- 3M Peltor ComTac V
- Ops-Core AMP Communication Headset
- DISCO32 DISCUS
- MSA Sordin Supreme Pro-X
- Sordin Supreme MIL CC
- TCI Liberator III / IV
- OTTO NoizeBarrier
- Silynx C4OPS (with adapter)
- Howard Leight Impact Sport (with 3.5mm adapter)
- Earmor M32 (with adapter)
- Walker Razor (with adapter)
Frequently Asked Questions
What PTT do I need for Motorola APX radios?
For Motorola APX radios (APX 900, 1000, 2000, 3000, 4000, 6000, 7000, 8000), use the Constant Able M9 with GCAI connector ($335). For the newer APX N-Series (N30, N50, N70) and MOTOTRBO R7, use the Constant Able M16 with Mini-GCAI connector ($399). Both feature auto-sensing impedance that works with any NATO-wired tactical headset.
What is auto-sensing impedance matching?
The Constant Able PTT automatically detects whether you are using a dynamic microphone headset (like Ops-Core AMP, Peltor ComTac, MSA Sordin) or an electret microphone headset (like Earmor, Howard Leight) and adjusts the circuit accordingly. No manual configuration, no guessing between amplified and non-amplified PTTs.
What PTT works with PRC-152 and PRC-148 military radios?
The Constant Able NATO with 6-Pin connector ($335) is designed for AN/PRC-152, AN/PRC-148 (MBITR), AN/PRC-117G, and AN/PRC-150 radios using the standard U-329/U connector. Set your radio to 3.3V Accessory Voltage ON and Mic to "Lapel Mic" for proper operation.
Do Peltor ComTac headsets work with the Constant Able?
Yes. Peltor ComTac headsets use dynamic microphones and come in US NATO wiring and European "Peltor Wired" variants. The Constant Able handles both impedance matching and wiring differences automatically. If you have a legacy U-94 PTT with European-wired ComTacs, audio will not work. The Constant Able solves this.
What connector does a Baofeng UV-5R use?
The Baofeng UV-5R, BF-888S, UV-82, and most standard Baofeng radios use the Kenwood 2-Pin (K1) connector. Use the Constant Able K1 ($250). Note: waterproof models like the UV-9R and BF-A58 use a different multi-pin connector and require a specific variant.
Can I use one Constant Able PTT with multiple radios?
The PTT connects to a specific radio connector type. If your radios share the same connector (for example, two Motorola APX radios both use GCAI), one Constant Able PTT works with both. The headset side is universal and works with any standard NATO-wired headset regardless of manufacturer or impedance type.