Why should I choose the Bose QC25 over the QC35, QC45, or QC SE, which are Bluetooth?
The QC25 is a wired model with no Bluetooth module, making it ideal for multi-operator SSB contests where simplicity, reliability and low noise are key. It avoids battery drain during long runs and eliminates feedback or latency issues common in wireless systems. In contrast, QC35/45/SE models have very limited internal space, making it difficult to install a permanent boom mic without compromise. If you prefer one of these newer models, HamSet now offers a professional clip-on mic kit for QC35, QC45 and QC SE, specifically designed for contest use.
Can I buy a QC25 on the market and then have it modified?
It’s possible, but we don’t recommend it. Trying to save a few euros often turns into a much bigger expense: many QC25 units available online come with poorly replaced speakers or non-original plastics, which means you’ll end up facing additional repair costs. With our refurbished models, you get guaranteed original parts, fully tested, and direct support in case of any issues.
I found a cheap boom microphone online that attaches to the QC35/45/SE. Will it work?
Some kits may appear compatible, but they have significant limitations: 1-The included microphone is typically a low-grade electret capsule with incorrect impedance for ham radios. 2-The cable is unshielded and uses a shared ground for mic and audio, causing audible feedback (your own voice leaks into the headphones). 3-A 4-pin to dual 3-pin adapter is required for standard radio setups. By replacing the capsule with a quality one, you may achieve decent results, but the cable remains a serious problem. Additionally, electret capsules lack the plug-and-play compatibility of dynamic mics, which is crucial in multi-op contest stations where switching operators must not require radio reconfiguration. The HamSet clip-on solution, with a professional-grade dynamic or electret capsule and a shielded, properly wired cable, ensures full compatibility and audio quality without compromises.
Dynamic or Electret Microphone? What’s the difference and which should I choose?
A dynamic microphone does not require external power and connects directly to the mic input of most ham radios. It is extremely compatible, directional (cardioid pattern), and works best when placed just a few centimeters from the mouth, aligned correctly. It delivers natural audio and can be fine-tuned using the radio’s equalizer. Dynamic capsules are ideal in contest stations, especially multi-operator setups, because they ensure consistency and immediate compatibility across different radios without needing to adjust mic gain or power settings. An electret microphone, by contrast, requires +5V phantom power (available on many Icom radios and interfaces like MicroKeyer) and has a very different internal architecture. The capsule provided in HamSet electret models is omnidirectional, meaning it picks up sound from all directions, with less isolation from ambient noise compared to the cardioid dynamic capsule. This makes it less suitable for noisy environments such as contest stations or multi-op setups, where cross-talk or background speech can be captured. However, the electret capsule provides: – Higher sensitivity, – Greater amplification, – A richer and more colorful sound, making it ideal for voice communication with a broad tonal range, streaming, or single-operator casual use. The downside is lower compatibility: many transceivers don’t support electret capsules natively and require special cabling or interface adjustments. In addition, since the electret signal is more “colored”, it’s harder to get a neutral or flat profile without proper equalization. Unlike dynamic mics, electret systems are more sensitive to cable shielding and power stability; poorly shielded cables may pick up noise, hum, or result in RF feedback. Compatibility with Yaesu, Kenwood, Elecraft and other brands is possible, but only with the correct adapter cable, which HamSet can provide upon request. For maximum flexibility and ease of use in contest environments, the dynamic capsule remains the preferred choice. The electret is recommended only when a more present, full-bodied sound is desired, and in controlled or quiet environments.
Can I modify my QC25 headset? What does the process involve?
Yes, you can send your QC25 headset to HamSet for a complete professional conversion. The service includes cleaning, earpad replacement, installation of the microphone (dynamic or electret), and a shielded cable with the correct termination for your radio. The modification is permanent and costs €120, excluding shipping. You can request it directly via our website.
The HamSet mic capsule doesn’t seem to have the same punch as my old Heil HC-4. Why?
The HamSet standard dynamic element is a cardioid microphone element. Like all dynamic mics, it must be positioned close and directly in front of the mouth to deliver optimal gain and articulation. Its compact and lightweight design prioritizes comfort and flexibility but requires precise alignment to the sound source. Compared to the Heil HC-4 or HC-5 (which are ceramic, not dynamic), the standard HamSet dynamic element is much more balanced and natural in its frequency response. The HC-4, in particular, is strongly mid-high boosted with a complete cut of low frequencies, designed to punch through pileups at the cost of tonal richness. The HamSet standard dynamic element is closer in sound to a Heil HC-6, offering a flatter, more neutral response that can be easily enhanced via your radio’s EQ. If you’re looking for a warmer, more full-bodied voice, especially in streaming or casual QSOs, the HamSet electret element is an excellent alternative—ideal for Icom, SunSDR, FlexRadio and similar systems that support powered microphones. Please note, however, that electret elements can be more susceptible to RF feedback in some station setups, which may result in distorted or unstable voice quality. For those who prefer a “plug-and-play” DX profile without using EQ settings or audio processors, the new HamSet DX dynamic element is available. It is engineered with a stronger mid-high presence, similar to the Heil HC-5 but much more balanced than the HC-4, avoiding its excessive harshness. The DX element delivers a sharp and penetrating sound with a full cut of the lows, ideal for radios without built-in equalizers or for operators who want a ready-to-use, contest-grade signal specifically tailored for DX pileups.
Can I use the HamSet clip-on mic system on my QC35/45/SE without modifying the headphones?
Yes. The HamSet clip-on mic kit for QC35/45/SE is completely non-invasive: it clips securely to the earcup without damaging the surface, and is fully removable. It includes a professional dynamic or electret capsule and a shielded dual-channel cable, ready to connect to your radio.
Is the mic removable or swappable?
IIn the clip-on versions, yes. You can choose between dynamic and electret elements depending on your setup, and replace the mic boom independently if needed. In QC25 hardwired conversions, the element is fixed and optimized for the chosen setup. However, on request, a QC25 model with a detachable microphone is also available—check our shop for details.
Do I need an interface to use the HamSet headset with my radio?
No. All HamSet headsets are designed to connect directly to your radio’s mic input, either via dynamic wiring or electret with adapter. No additional interface is required for basic operation. Please check our shop for available adapter cables to match your specific transceiver model.
Can I get a version with a condenser (electret) mic for more audio presence and depth?
Yes. HamSet offers the QC25 with a professional electret microphone, designed for Icom and other radios with bias power. For Yaesu, Elecraft, Kenwood and others, we can provide the correct adapter cable. This version delivers more gain, detail and warmth in voice transmission, especially useful in non-contest use, streaming, or for operators who want maximum audio presence. Please note, however, that electret elements can be more susceptible to RF feedback in some station setups, which may result in distorted or unstable voice quality.
Didn’t find the answer you were looking for?
Submit your own question! If you have a specific question about HamSet headsets, modifications, or accessories, feel free to reach out. We’ll be happy to answer directly and, if useful for other operators, add your question to this FAQ section.
Didn’t find the answer you were looking for?
Submit your own question! If you have a specific question about HamSet headsets, modifications, or accessories, feel free to reach out. We’ll be happy to answer directly and, if useful for other operators, add your question to this FAQ section.
