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CVR VS ADMARK VS OTHER
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FALCETTA View Drop Down
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    Posted: 11 January 2024 at 5:47pm
Good evening, I should buy some 1U class D amplifiers, I'm looking for information everywhere (you tube, facebook, instagram, google etc etc) but I always find conflicting opinions.
I've noticed that many users here use Admark CVR amplifiers etc etc, I'd like to get some opinions from you users on this matter, are they all the same/similar or are there brands that are better or worse than others?
I was inclined to get 4 Admark AD42s, I saw on YouTube that they deliver 5kw rms per channel at 4 ohms which are not bad at all, I saw that another model of Admark AD60 has been released and from the tests on Yuo Tube it seems to deliver 6kw per channel at 4 ohms, really excellent. (this ad60 seems to be practically the 4-channel ad442 version in bridge)
my question is how is it possible that from the photos the AD42 has much more capacitors than the AD60 and despite this the AD60 pulls more power?

Does anyone have experience with AD60?

in conclusion, in your opinion which is better between admark cvr and the various other manufacturers?

thank you very much


Edited by FALCETTA - 11 January 2024 at 5:49pm
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GaN (gallium nitride) is the answer to your question.

AD60 is GaN, AD42 is good ol' fashioned class D

not sure if this is a good read or not but looks like it might contain a good primer:

the general consent is admark / CVR > other chinese class D
admark seems to be slightly pulling ahead in innovation with the AD60, to me this indicates a general investment in technology that will probably translate to the quality of their amps.

i think the AD60 is possibly the first gen GaN amp for them. i would probably hold out on it for now for that reason and wait for the line to expand, or an obvious second generation to launch. it would be foolish to run it on shows without solid testing from you and others, or a brand name to back it up. having said that adMark as quickly becoming viable players. just very aware that chinese quality control still does leave a lot to be desired at times.

i once again link this doc if it's useful, really need to finish it (i say this every time)


Edited by teeth - 11 January 2024 at 7:26pm
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thank you very much for the answer, yes I know gallium nitride (if I'm not mistaken Sinbosen also makes models with gallium nitride) unfortunately however I fear that AD 60 is simply the AD442 version (4 channels) with 2 bridge channels, in fact the declared powers coincide, even in the photos and videos online of the AD60 you can see the 4 heat sinks like on the AD442 and the specifications also show the same wattages, and moreover the AD60 cannot be used in bridge (I imagine because it already is).  And what about DSP?  I see that my people advise against taking the DSP version, why?  what can be done via the small display of the version without DSP?
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The AD 60 is indeed the AD 442. It was only a matter of time before they would offer such an option. The AD 60 cost less than the AD 442. I am uncertain why bridging would be necessary as the majority woofers out there would have difficulty managing the output power of the AD 60 in stereo mode. 

I have been debating to buy a few or not since last year. The AD 60 offers it's best performance at 4 ohms per channel. The 2 ohm per channel fans will more than likely just stick with the AD 42 and/or 442.

The AD 60 appears to be popular with those who reside in Mexico.

Best Regards, 
Elliot Thompson
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[QUOTE=Elliot Thompson]L'AD 60 è infatti l'AD 442. Era solo questione di tempo prima che offrissero tale opzione. L'AD 60 costa meno dell'AD 442. Non sono sicuro del motivo per cui sarebbe necessario il bridge poiché la maggior parte dei woofer in circolazione avrebbero difficoltà a gestire la potenza di uscita dell'AD 60 in modalità stereo. 

Sto discutendo se acquistarne alcuni o meno dall'anno scorso. L'AD 60 offre le migliori prestazioni a 4 ohm per canale. Le ventole da 2 ohm per canale molto probabilmente rimarranno con gli AD 42 e/o 442.

Il 60 d.C. sembra essere popolare tra coloro che risiedono in Messico.

Distinti saluti, 
[/CITAZIONE]

thanks so much for the reply, I assumed it was the same amplifier.
I'm really doubtful whether to get AD60 OR AD42, honestly it seems to me that AD60 has fewer capacitors compared to AD42 even though (ad60) delivers more power!!

There are videos on YouTube of power tests, where you can clearly see that the AD42 delivers 5200 watts RMS and the AD60 delivers 6000 watts RSM.
I should use them to drive dual 18" subwoofers that require 5000 watts RMS.
I didn't find much about peak power (actual measured).
Also do you have experience with the DSP of these amplifiers? they highly recommend taking the version without DSP for what reason?



Edited by FALCETTA - 12 January 2024 at 11:28am
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The AD 42 appears to offer more power than Admark's advertisement on their Crest Factor 4 ohm per channel specification rating. The AD 60 appears to offer less power than Admark's advertise rating based on their Crest Factor 4 ohm per channel specification rating.


The above is based on observing the output voltage rating from the videos. It does not take much to do the math for the Crest Factor once you have the measured RMS voltage at a 4 ohm load.


Many companies use a lot of capacitors as means to make up the loss of a voltage drop due to not having enough current. If you have enough voltage on the rails, and, enough current for sustainability, you won't need a lot of capacitors.


Running cooler seems to be the AD 60's biggest selling point. The differential between the AD 42 and AD 60 would be around +0.44 dB in favor of the AD 60 based on the videos.


I do not have feedback on the DSP as I don't need an on-board DSP for my amplifiers.


Burst ratings require a lot of current at a moments command at 4 ohms. When I benched the K30 for burst ratings, a single channel pulled nearly 40 amps on a 250 volt line source. Possibly the author of the video does not have the enough current on demand to make bursts measurements. The majority who use these amplifiers a more concerned with the continuous average (RMS) rating than burst power.


Best Regards,


Elliot Thompson
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Keep the great info coming, Elliot..
Global Depopulation - Alive and Killing.
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Originally posted by Elliot Thompson Elliot Thompson wrote:


Well depends, me personally would want the amp for the extra peak headroom for dynamics. Those continous ratings in the pic are more then enough to burn drivers like the NSW6021 which is one of the most high power drivers on the market.

Used a AD430 on 4x SAN214.50 in cubo sub with 6 12 Ohm DAP compact array for 3 days straight with heavy use and did it perfectly. Definately not lacking in the sub department!


Regarding the rest, I would vote CVR if you go with the DSP version. The Admark uses Alldsp SBD44 which is not bad, but the CVR one definately has more features. 
Note that CVR and Admark don't build the amps themselves. 
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D4-3000 DSP Sound Audio 2 ohms stable High Power Digital Amplifier (sinbosenaudio.com)
https://www.sinbosenaudio.com/3000w-5000w-4-channel-dsp-amplifier-p00305p1.html

I haven't noticed anything on the CVR DSP that you can't do on Alldsp (some screenshots on the sinbosen page above). But the CVR DSP does look and feel a bit more user-friendly.
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thank you all so much for the info, so what do you recommend in the end?  AD60 or AD42?  In the versions without DSP I imagine that there is no possibility of inserting limiters directly from the amplifier, correct?
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Originally posted by snowflake snowflake wrote:

D4-3000 DSP Sound Audio 2 ohms stable High Power Digital Amplifier (sinbosenaudio.com)
https://www.sinbosenaudio.com/3000w-5000w-4-channel-dsp-amplifier-p00305p1.html

I haven't noticed anything on the CVR DSP that you can't do on Alldsp (some screenshots on the sinbosen page above). But the CVR DSP does look and feel a bit more user-friendly.

The CVR has definately more processing power. It has 500 taps for FIR per channel compared to 144 taps per output. The limiting could probably be the same with the AllDSP one but not as easy compared to the CVR. 
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