I actually wouldn't be surprised with those results, depending on voltage used during testing. If it was on a resting AGM battery, that's probably close.

 

Those amps better do better than 53% of advertised output @ 4ohm.
Grant it they are spec at 14.4 volts so I am expecting at least a 25% drop at 13-13.5v. So around 335 to 340 watts.



As Shocker stated it may have been tested on an AGM with only 12.6v static before a load.

I will be testing with a lithium battery/batteries and a load bank.
I can keep a solid 13.5v plus with my set up.

The result you posted reminds me of the Massive amps I tested a few years back. They had VERY disappointing results.

 

Even at 12.6V I would expect better than 230V. Really looking forward to your results. Thanks!

 

That amp looks nice in that it seems to have bandpass ability for those that don't want to use a DSP. One thing I thought was suspicions though is they don't list a THD spec on their website. When I found the THD rating in their manual it seems pretty sloppy.

4Ω @ 14.4 Volts & 1% THD : 4 x 450 Watts 4Ω @ 14.4 Volts & 1% THD : 4 x 200 Watts

Most other quality amps seem to have much lower Total Harmonic Distortion ratings.

 

The next question is at what frequency was that THD configured from??? They don't give you that figure in this instance.
Was the frequency 40hz,400hz,1k,4k,8k who knows.
Some manufacturers will give you the frequency that the measurement was taken as shown in the picture below.

95% of the people will not be able to hear THD in an audiophile setting..
You will definitely not be able to hear it out in the open on a bike going down the road.



.

 

I think in my case not being able to hear the distortion going down the road may be a problem. I guess I am thinking along the lines of if one amp is less likely to distort even a little at high volume that might allow my speakers to last a little longer.

 

Proper system set up will cure the issue of speaker issues. Been there done that and learned from my mistakes years ago as replacing speakers can get spendy.

I have been running the same fairing speakers (beyma pro6w/nd) for 3 plus years with multiple different amps,power levels and processors.

 

Granted these are more for the car side but I will be running these in my cage soon.

https://dbdrive.net/product/g7-500-4/

https://dbdrive.net/product/g7-2500-1/

 

Some numbers I have seen posted from this amp -
40hz test tone bridged = 80V (1600W)
1k test tone bridged = 69V (1200W)
1k test tone = 36.3V (330W)
13.9V - 1k test tone bridged = 69V (1200W)

 

So with the figures you posted of 13.9v the bridged test averaged at 78% and the single channel was 74% of rated power of 14.4v.

Were the channels on a load bank when checked or just open??

So my WAG of 75% of rated power of 14.4v was pretty close.

If the weather here doesn't disrupt delivery the amps I ordered for testing are scheduled to be delivered tomorrow.