Any tip on cheap sennheiser chinese copies iem's?

[foliver]

Good morning, has anyone tried the Chinese copies of Sennheiser G4 IEMs?

I need several units for close-range audio, and they might be an option.

Any particular brand? Any purchase links?

 

Thanks for your opinions.

 

[humbuk]

https://www.ld-systems.com/en/series/u300-iem-series/

https://www.ld-systems.com/en/series/u500-iem-series/#ref-anchor

But they don't have a battery transmitter, I use a Sennheiser evolution.

[DanieldH]

I'd doubt, that many ppl here would recommend literal "Chinese copies". And if cheap alternatives to the usual suspects would exist, people would use them. 
Most of the cheaper tourguide/conference or stage monitoring systems likely won't make it >10h over a working day. (Humbuks suggestion likely neither.) 
I know a sound mixer giving out T-bone receivers (to whoever comes unplanned) that are compatible with analog Sennheiser Evolution TX in E-band. But these are likely not to the satisfaction of listeners either. 
Deitymic offers a professional budget system that is made for out craft but you might also need to swap batteries at lunch or so, if you use economical NiMh units.

[r.paterson]

These seem to be the best  alternative compander compatable to senny iem receivers. https://pinknoise-systems.co.uk/products/rela-pm-320r

 

[humbuk]

@DanieldH I don't know what exactly you mean by not lasting 10 hours? Like batteries, or that they will fall apart? They have a much longer battery life than Sennheiser, the range is absolutely identical - I use them together with classic Sennheiser. The advantage is that they work on one Sennheiser transmitter. For people who need super high-quality sound, I have Sennheiser, for others, LDSystem, which of course has significantly worse sound than Sennheiser, but the vast majority of people I give headphones to won't know the difference - unfortunately. Before that, I had some tourist guide boxes that weren't very good because they work in the EU on about 830MHz, where it's very crowded and there's a problem with the signal.

[Paul F]

I'd pass on the ones from Aliexpress that look just like a G3. While they work, the volume level is a bit limited. The deal breaker is that they have a very limited number of frequencies. Too few to make them useful in my opinion. I have a couple collecting dust. I won't use them as I can't count on them finding a frequency that is available and compatible for intermod. 

 

They are compatible with Sennheiser transmitters.

 

[DanieldH]

4 hours ago, humbuk said:

@DanieldH I don't know what exactly you mean by not lasting 10 hours? Like batteries, or that they will fall apart? They have a much longer battery life than Sennheiser, the range is absolutely identical - I use them together with classic Sennheiser. The advantage is that they work on one Sennheiser transmitter.

Hey humbuk, 
LDSystems claims:

Quote

Batteries

2 x 1.5 V AA/LR6 @ max.10 h

That is more than enough for whatever "guests" that appear or anyone that needs a cue for a scene. But if they are 10h max, you will need to change batteries, e.g. at lunch, if you want to give them to anyone who uses them over the entire workday. At least my workdays are, including lunchtime, usually longer than that. 
All these Sennheiser EK (300, 500, 1039, 2000, etc in whatever generation) did work well for me until next days lunch (if turned off over night) on NiMh, like Ladda 2450.
That being said, I just checked the EK300 G3 manual, and Sennheiser states "4 to 6 h operation time, depending on volume", witch does not correspond with my experience and is a mystery to me. So it might very well be that the LDs last longer than Sennys. I was just referring to LDs official specs.

[humbuk]

I write from my own experience....

[IronFilm]

Leicozic IEMs could be what you're thinking of. I've got a bunch of them. They get the job done, not great, not awful. Certainly better sounding than other popular options such as Comteks, thus in my eyes they're "good enough". Can pair them with a Lectrosonics T4 transmitter if you want more range and a more portable transmitter than the Leicozic rack transmitter. Stick Eneloops/LADDAs in them and you've got enough power to go all day long, and maybe even for the second day too. 

[foliver]

On 12/15/2025 at 7:29 PM, IronFilm said:

Leicozic IEMs could be what you're thinking of. I've got a bunch of them. They get the job done, not great, not awful. Certainly better sounding than other popular options such as Comteks, thus in my eyes they're "good enough". Can pair them with a Lectrosonics T4 transmitter if you want more range and a more portable transmitter than the Leicozic rack transmitter. Stick Eneloops/LADDAs in them and you've got enough power to go all day long, and maybe even for the second day too. 

Thanks all for your replies.

I've some G1 ( tankss) and G4's ( 10 total) along with some comteks that i don't use anymore.

The Leicozic can be used with senns transmitters?

 

Thanks for the LD and Relacart opinions, these brands seems to be used by many around the globe, and everyone sais that they works, and they seems better ( according to users) not only on sound quality, but in how they're manufactured than the Senns copies like the Leicozic.

Some time ago i used from a friend another brand (XXXXX) senns copies. Strange that the receivers doesn't works with senns transmitters, but senns receivers worked with XXXXX tranmitters.....

 

Thanks for your experiences shared.

[Paul F]

7 hours ago, foliver said:

The Leicozic can be used with senns transmitters?

 

Yes. The ones I have operate in the Sennheiser G band as you can see in the attached table. It has 40 frequencies of which, 14 (blue cells) operate within the Sennheiser pre-arranged 'safe for intermod' frequencies. But of course, if you have something like TXAdvance, then you can sort out the intermod spacings yourself. 

[IronFilm]

On 12/18/2025 at 12:15 AM, foliver said:

Thanks all for your replies.

I've some G1 ( tankss) and G4's ( 10 total) along with some comteks that i don't use anymore.

The Leicozic can be used with senns transmitters?

Yes, it's not a perfectly exact match what they use vs the compander used by Sennheiser wireless systems but it close enough to "work". Just like when you mix and match Sennheiser and Lectrosonics wireless in the right compatibility mode. 

 

Then the other issue is having matching frequencies on both the Leicozie IEM receiver and the Sennheiser transmitter, and again they won't be a perfect 1 to 1 match up for all the frequencies that both the Leicozic and Sennheisers can do, but as @Paul F pointed out you can make it work and find enough that are the same on both that it is workable. So basically if you work a lot in densely RF-polluted environments on mission-critical shoots, then you could find Leicozic is not for you. But I'd say for most of us, if we're smart about it (i.e. planning ahead with common sense frequency coordination), then they're more than "good enough" to get the job done. Certainly I personally have no complaints after using them for many years. 

[BAB414]

23 hours ago, IronFilm said:

Yes, it's not a perfectly exact match what they use vs the compander used by Sennheiser wireless systems but it close enough to "work". Just like when you mix and match Sennheiser and Lectrosonics wireless in the right compatibility mode. 

 

Then the other issue is having matching frequencies on both the Leicozie IEM receiver and the Sennheiser transmitter, and again they won't be a perfect 1 to 1 match up for all the frequencies that both the Leicozic and Sennheisers can do, but as @Paul F pointed out you can make it work and find enough that are the same on both that it is workable. So basically if you work a lot in densely RF-polluted environments on mission-critical shoots, then you could find Leicozic is not for you. But I'd say for most of us, if we're smart about it (i.e. planning ahead with common sense frequency coordination), then they're more than "good enough" to get the job done. Certainly I personally have no complaints after using them for many years. 

Given the mismatch, how do they sound? I'm looking for something in a certain block that sounds as good or better than an R1a.

[IronFilm]

Sounds better than a Comtek at least! ha

 

They're really dirt cheap, you should buy just one to use for testing then decide for yourself if it meets your own needs/criteria/threshold. Then if so, you invest in getting the rest (half a dozen, two dozen, or whatever). 

[Paul F]

 

 

 

Attached are a G3 receiver and Lecozic SR-2050 audio files. I used the Leicozic a few years back and I don't remember it having such a diminished audio quality as I hear in this recording. Iron, does it sound right to you? Maybe I missed something.