1. These amps come with a 10amp plug, however it says at 1/3rd power it can pull 15-25amps depending on the resistance. How is this possible? Or are they referring to the output current that has been stored in the capacitors like a battery almost? Does this mean there is any benefit to running them off a 15amp circuit?

2. These amps have dip switches on the back that control the input sensitivity, however the higher the gain in db the lower the voltage goes. Why is this? For example; 32db = 3.18V, 35db = 2.25V, 41db = 1.13V. 

3. The manual says the knob on the front controls the output amplitude. I thought it would be an attenuator for input sensitivity. What does this knob actually do?

I have tried communicating directly with the companies however due to them being Chinese they have a hard time understanding my questions. They couldn't even tell me whether or not it's better to run off a 10 or 15amp circuit, which is why I'm posting here.

Hope someone can be of assistance.

Cheers:)

Scientific method of establishing, if new megawatt, cheap CHinese amplifier, has specifications, that are in anyway accurate, and if your bass section, will or won't go quiet, before the end of the night.

At least if you buy a big enough Powersoft, K or X series, it will actually drive your speakers sufficiently, even if it doesn't meet published spec.

Well, there are some post on this forum including benchtest (as far as they are representative of real world applications) which prove they do what they say. I one two AD430's which power 2x SAN214

50 per channel x2 and 2x mid high perfectly. 

Why the 10A plug? Because their target group is most likely to only use smaller capacity circuits. I personally have them directly fitted to a 32A powercon. But most applications worked fine with a 16A circuit until now.

Dipswitches? Just like any other amp, to adjust input sensitivity.

Most resellers like CVR, Admark etc do not build the amp by themselves which explains the lacking knowledge.

Power consumption is pretty much a non issue powering Mid Tops.

However, powering subs, is when inadequate Power Supply Unit, fails, blows, or catches fire.

Which is why, most Chinese Lightweight manufacturers, have a problem being honest about current draw,  and some how magically quote output figures of 5K+ per channel @ 2 ohms, yet max current consumption quoted is 16A-20A.

Also, bench test, with purely resistive load, is next to meaningless, as loud speakers also have inductive/capacitive reactance, which causes amplifiers with lesser output sections/psus, to struggle to meet specs.

Hence not only is resistance quoted, but also impedance, as it changes with frequency.

I know of a British made lightweight, with an extremely well respected name, that also came with genuine Powercon 32A input socket.

It was quoted with max current draw of 32A.

Did anyone ever draw 32A on metered mains, unlikely, as at 4 ohm stereo, if you ran it on sub, with hpf below 50hz, the amplifier limited itself.

EDIT:Point being, lower than expected, quoted max current draw  figures, should immediately ring alarm bells, about lightweight amps.

Also even, 32A powercon input, is no guarantee of accurate specs either.

Confirming number of output devices per channel, transformer(s) ratings, and power regulator(s) specs, tends to provide more accurate representation, of amplifier true performance, lighweight or transformer.

At least if you buy a big enough Powersoft, K or X series, it will actually drive your speakers sufficiently, even if it doesn't meet published spec.

Yes, although powersoft and the likes are a bit out of my price range. I've used these chinese clones before. For the money they are great.

smitske96 wrote: You are currently only making assumptions on a previous case from s different case.

Eventually you will come to the realisation, (for sub), no lightweight amplifier, meets quoted specs,  20hz-20khz,when specs are based on 1khz burst.

The general rule of thumb is, for sub, if you really need 2.5kwpc @ 4 ohms, get lightweight rated at 5kwpc @ 4 ohms.

This is the deal, entirely !!!

As Rog once said, Chinese manufacturers, can produce quality units, when someone with a baseball bat, is in charge of Q&A.

Are those new amps from Blue Aran (K12 and K16) with similar front panels the same as the Admark and CVR or something else?

If so, anyone know what their equivalent models are?

Not suprising, as apparently, Powersoft stated X series are not designed for sub use, on all channels.

I was also told (hearsay), X4 does get plenty hot, when used as above.

I've heard an X4 driving 3x subs not sure of config, if 1x per channel or whatever, but it drove those 3x (assumed 8 ohm subs), as well as any transformer amp I've heard.

But then, you don't spend that kind of money, to power 3x subs.

Also I doubt most amp specs are wrong just that they are not specifying enough of the test conditions.  A lot of the amps from China are very powerful as independent measurements of amps like the Admark K30 have shown.  The Blue Arran amps also claim independent measurements.  Here are some more measurements of a Sanway amp pushing serious power: https://data-bass.ipbhost.com/topic/917-robs-amp-tests/page/3/?tab=comments#comment-21756 " rel="nofollow - https://data-bass.ipbhost.com/topic/917-robs-amp-tests/page/3/?tab=comments#comment-21756  ;

They do meet their specs, this has been said multiple times. I have been here long enough that you applications differ a lot from most 99% of the industry. 

The AD430 performed great, I am sure it could have burned every coil of the 214.50 if I let it. If thats not enough power, I do not know what is. The 214.50 were more excursion/distortion limited before the amps limit. 

I've seen sound systems in Jamaica using 100/100 dual poles and have no issues with the amplifier's performance. 99.9% of the time they play outdoors where the demand is far greater than playing indoors.

Just because a person can afford these amplifiers, does not mean they have the resources to feed the amplifiers the proper amount of current.

Best Regards,   

I even see that they have a AD442 now! Just after that I have the AD430's 

I encountered the same thing when I bought my K30. A few months later, K35 then, AD42 by the end of the year.  

Best Regards,

and seems very strong.

I'm sceptical of quoted output power, of cheaper Chinese lightweights, until I hear feedback  about real world results.

And by real world results, I mean on sub use, < 50hz hpf, at 4 ohm stereo.

When someone reports they have played number of gigs as above, and sub tone was "full/warm", amp remained fairly cool all night, no thermalling/premature limiting, I class that as a success.

I would not class the above, as a requirement for 1% of users.

8 x21s ( bass ) 

4 x 18s ( mid bass )

4 x12s ( mid )

and comps and bullets 

in a room where sounds norm bring 4 scoops and when it was dropping it took my face off , there was no shortage of sub that's a certainly 

Don't doubt that, problem is, I hear there is big Powersoft shortage right now..

paulus wrote: 33 to 80hz on sub duty i personally set mine to

This is what I call, real world, sub usage, especially with pre amp, for Roots Reggae, and not many amps of whatever country of manufacture, can handle this without issue, 4 ohms stereo, week in, week out !!

Hence sceptical, until unit is tested and proven.

You may need to sway away from your circle friends and focus on Sound Systems in Jamaica. They play multiple times per week for years using CVR/Admark with no issues.

These amplifiers have already proven themselves year in and year out to be very reliable in the field. This is why, the majority of sound systems in Jamaica use them.   

Best Regards, 

[/QUOTE]

I'm sceptical of quoted output power, of cheaper Chinese lightweights, until I hear feedback  about real world results.

And by real world results, I mean on sub use, < 50hz hpf, at 4 ohm stereo.

When someone reports they have played number of gigs as above, and sub tone was "full/warm", amp remained fairly cool all night, no thermalling/premature limiting, I class that as a success.

I would not class the above, as a requirement for 1% of users.

I've heard from many people that Admark and CVR are just fine for sub-bass duty (20-90hz). I know a few people who have had them powering subs doing this range for 20hrs per day for 3 days straight. This is for EDM music as well.

Really hearing contradicting feedback about Jamaican/West Indian usage, of these amps.

Yes, they are selling well, yes many sounds running them, but told mostly with 50hz+ HPF !?

On European continent (Esp France), where number of heavy Roots Dub sounds are increasing, and hpf 30-40hz is very common, amps like Void Inf8MK2 and Powersoft K20/X series are sought after.

You may have forgotten that I don't use High Pass Filtering for Sub use. A HPF of 35 Hz 12 dB per octave is what I use for my low-mids. Familiarize yourself on the "Longevity Test" I made nearly 2 years ago. In addition to the "Tonal Characteristics Comparison" test. 

What amplifier (Brand) are you using at the moment that you want to compare the Admark/Morin to as a reference?

Best Regards,

On European continent (Esp France), where number of heavy Roots Dub sounds are increasing, and hpf 30-40hz is very common, amps like Void Inf8MK2 and Powersoft K20/X series are sought after.

French soundman here, more and more reggae/dub sounds are going admark or rebadges, there are (at least) 2 resellers/rebadgers (hexa audio and mdm) in the counrty and they sell well.

The advantage of getting a rebagdge at higher price is getting an amp correctly tested, having the 2 years full warranty, stocked spare piece in the same countrys, and easier/faster support after the 2 years. The drawback is ... well, the price.

I know that they are very popular in other genres too (think free / rave party sounds)

Seen a sound play 8 fane xb in larry scoops in a meeting in 2 ohms, sounded good and heavy, not eye-wobbling breath-taking heavy but I doubt you could with this box/speaker combo (huge room 1000 capacity). The soundman has done many gigs (1 year I think) and was very happy with the amp.

I've heard many reports of the amp powering subs as it should and being reliable.

A friend benched the same model, said that is hold its power in 8 and 4 ohms but in 2 ohms loose juice for the long sub notes (esp those hitting the lowest impedance point of the driver/box)  due to the amp power supply not powerfull enough. So the output voltage drops. Fine in 4/8 ohms though.

For the price one could have a spare one at the ready, able to be swapped for 4 ohms bass, or 2ohms mids / tops ...

Great Post.

Confirmed  much of what I was told/thinking.

 

Hello, i do not wish to compare these with any amplifiers as they are of no interest to me

Below is a feedback from hornplan's forum user Mr One (translation by google with some corrections by me) This is the same model that I talked about in the above comment. One thing I didn't mention is some complaints that the amp's gain is stupidly high (45db) Also from my friend's bench test (not MrOne), the amp don't trip a 16A breaker on 8 or 4ohms full tilt.  Remember here we have 16A 220V domestic power (even up to 230/240 in proper concert halls / big festival generators). Also IIRC the amp was delivering stated output in 2ohms on one channel only but voltage dropped rapidly if both were loaded. Don't quote me on that though.

I am going to test it in 4ohms on sub (or maybe 2ohms on kicks or mids just to check but I don't intend to use the like that long term)

Feedback from the tests carried out this afternoon with my friend Paulztw, in competition were the Powersoft X4 and the HA 2600D hexa audio. Powersoft's power supply was taken from a 3x32 amp start and 15 meters of 5g6mm2 cables (the amp works in three-phase). At the powersoft rack output I had 16 PCs available to power the hex amp. Power supply was top notch. The two amps were connected to two MDC3 (2.66 ohms per sub) via 12 meters of 4mm2 cable. The first test took place on the 2600D, we slowly turn up the master....and then....boom! no I'm kidding ^^ impossible to get to the clip. The MDCs have cashed in but we have reached the limits of the subs towards -3 db on the amp, which is a good sign for the output power. We were able to measure a consumption of 10 amps in 2x2.66 at -3db which should give a consumption of around 20 amps to the clip. The bass is well maintained, the amp does not flinch. We then went on to listen to several tracks, alternating between X4 and HA2600. Not really a difference in sound, maybe a little rounder on the HA but really not much. These amps hold the loudspeakers very well. In output level the two are identical. In summary this ha is a beautiful machine, it should be able to find its place in the racks and compete with cvr on the next configs

This tells me a lot.

I have managed to pull 7.7A, on a 230V supply, when using 1x 8 ohm (nominal) driver, on 1x channel of Void Infinite 8 MK2, approx 7A, on a QSC RMX 5050.

I don't subscribe to the magic "power drawn from an alternate universe theory", so I expect an amplifier to draw sufficient current, to output specified power.

Well, it is not magic if you understand the underlaying electronics. 

But everyone on the forum knows that the scoop section is not representable for the whole industry again. 

Just get an AD42 or comparable, and test it. Just jumping on conclusions based on various tests (and ignoring the positive ones) which all had different conditions, does not bring anyone anything.

I have managed to pull 7.7A, on a 230V supply, when using 1x 8 ohm (nominal) driver, on 1x channel of Void Infinite 8 MK2, approx 7A, on a QSC RMX 5050.

Weird flex but OK.

EDIT : the model in question is fitted with 32 powercon socket, but shipped with standard 16A plug cable.

The tested I mentionned was conducted on real drivers with musical signal, not resistor banks with sine waves. Maybe this would require more than 16A yes.

Personally I'll only feed them 32A even in 4ohms even if overkill as we are lucky to almost always have proper 32A triphase supplies in all proper halls/festivals and there is a distro in the amp rack anyways.

Should give them a proper test this summer (think lots of dirt, scorcher, high spl, fixed install for few days) and report back in september.

Agreed..

My generalising point of view on lightweight amps changed, when I observed Powersoft K20 drawing > 34A @ approx 230V, when running in "4 ohm" stereo.

So now, I accept, there are well designed and implemented lightweights, that may not provide spec'd power, but will properly power drivers on sub freqs, in 4/2 ohm stereo, "if" powered sufficiently.

Then you have...

https://hexagone-instruments.com/produit/amplifier-ha2x2600d/" rel="nofollow - https://hexagone-instruments.com/produit/amplifier-ha2x2600d/

They are rebadged CVR’s boss . So the price is slightly higher cause the man answering the phone for service is next door . 

My point was not personally directed at you, boss !!

Just pointing out, regardless of transformer or lightweight, even if lightweight is packed full of space technology, and smoothing caps, with approx hpf of 40hz, and "some bass boost" at 40hz, at "4 ohms stereo", full tilt, that sub  amplifier will be drawing serious peak current, if it really is providing > 2.5kwpc @ 4 ohms.

Lev them amps have nuff caps to give you that power I would say have stable power 16 and you can run them down to 2ohm , some sound in us and Canada even Jam are using them running 3*21” per ch , I think you should buy one , if you don’t like it I’l buy it off you . 

Looking out for used  K35 or AD42.

Would not buy new, as is not an investment, and resale value won't go up.

http://gyimpex.com/PFC-series-4-channels.php" rel="nofollow - http://gyimpex.com/PFC-series-4-channels.php

So what was the point of the post? 

Those who own these amps are willing help those that are considering buying them. Basically, clearing the air of the naysayers hearing rumors on what the amplifier can and cannot do.

 

Best Regards,

Atleast don't spread hearsay as you did not test them personally. Such comments can spread mis information quite fast.. which effects people who are new to the area the hardest. 

Are you going to use it on the 21s??

yes Boss since it's impossible to get K20 and the X4l will cost me both kidneys , we need to run 18 - 21" this summer , am getting three different amps, want to try them with 3x21" per ch if they a stable . then we'l buy more and only run them 4ohms . 

Have you tried the PD 21" yet ?

Esc4pe wrote: I have had the 3002 for quite some time and it’s great! But it’ll just go in one ear and out the other to everyone if you compliment them, pointless trying

Glad to hear you are enjoying your amps.

However not everyone makes the same demands on their sub amps, so even though your experience may be positive, doesn't mean someone running the amp, playing their music material, with their HPF setings, with their cabs. and different sub boost,  will have same experience.

I recently had +ve feedback, regarding Admark K30, from a crew using the amp, in same demanding manner, I would, so that is enough for me to look for K30 or AD42.

I do appreciate that. My HPF is set lower than a lot of scoops (30hz) but I do not boost anything other than a smidge at 40/45hz. Since had new amps so its job now is just running USB BPHs of which it can do 2 a side when asked to so it earned its keep like 2 years on

no DSP will still run our XTA's for DSP to be on the safe side , will maybe try the DSP one for an install later ,

Will be interesting to see a proper test of this amp. 

We have owned one for around a year. But as we only have two subs at the moment, have only used them at 8 ohms a side, never 4 or 2. 

I think if we ever have more than 4 drivers we will just buy another amp as they are fairly cheap, rather than go for 2 ohms. 

Best Regards, 

Best Regards, 

I repaired a POS LG mini system for someone last year. It claimed some silly power output, so I found the manual to check how it was measured. 25% THD... I can only imagine what that would sound like!

How do you like the DSP? Is it AllDSP inside? 

its indeed AllDSP (SBD44). It works ok. Fast but very simple UI, and for me personally not enough capabilities processing wise. The LCD of the amp is also quite limited

I now run some CVR 3004 DSP which are basically the same amp as the AD430 with a different DSP and some other small tweaks. Its the same DSP as used in the wharfdale DP-F series. I am not sure which manufacturer makes the DSP, but its looks nice and works nice.

Its by no means Armonia , Lake or any other pro environment , but its ok , there is even some FIR . 

There is even a GaN-transistor based version with 520VDC rails (2* 260V or so)

However the sound quality is exceptionally poor..

There is 'ALLDSP' inside which is also ruins sound quality.

It it not reach any of the professional grade performance.

We were unable to determine what makes the sound quality so bad but If you take an oscilloscope the waveforms on the output are very ugly.

I have pictures somewhere, let me find them and show..

Horrible in every audio meanings :-)

Admarks sounds rather good to my ears

I am talking about this comment about the ad442 specifically .  

I've been told by number of Jamaican Reggae sounds, who have both Powersoft K20s, and Admark AD42s, comparing both amps, side by side, playing 2x 2x21" cabs per channel of each amp, the Powersoft produce more SPL, however the Admark have a warmer sound.

This seems logical to me, and what I would expect, considering price difference.

Makes used Admark, worth the price, to me.