Is my amp "High Current"?


Hi, I own a McCormack DNA 0.5 amp that has been upgraded to rev. A at SmC Audio. I read about speakers benefiting from using a high current amp, and was wondering if mine was considered to be one.

Thank you.
koestner
High Current is most commonly used to describe an amp with the ability to deliver increasing amounts of current into low impedence loads. The ideal amp would deliver twice the current as the load halves. For example, 100 watts into 8 ohms and 200 watts into 4. Many designs are able to deliver brief peak amounts of current far in excess of their rating, but can't sustain current demands for very long.
You can check the specs on the amplifier for "amps" no joke. That tells you if the peak current is high lets say 40 amps but big SS are higher. Whereas the cheap 5 lb 100wpc uses a power transformer delivering 100 volts which is all the amperage it's going to get vs, a 1kilo volt transformer -now the amp weighs closer to 100 lbs more - and has 1,000 volts to draw on. That's why there is a warning not to try to service it yourself "Lethal Voltage". The advantage is that you have head room for demanding passages.
Mechans, confusing volts with amps and also throwing lbs for good measure renders your answer less than helpful.
Respectfully, Bob p.
One easy definition of a 'high-current' amp, as Monty mentioned, is one that has a continuous-power rating of double its output power as the load halves its impedance. This test is rather strenuous, and many amps just can't do it. The key word here is 'continuous'. For a short-enough period, any amp can double its power when the load halves. To be able to pass twice the current continuously, almost ALL parts in an amp that pass current, and that's at least all the power supply and active circuirty, have to be larger and the entire system has to be able to dissipate the heat*. A few amps are built with large-enough parts that that they'll double output again into 2 Ohms, and fewer still will double again into 1 Ohm. I had a Lazurus HA-1 stereo poweramp that was rated 50WPC into 8, 100WPC into 4, and 200WPC into 2.

So maybe one definition of 'high-current' is having a continuous-power rating into 4 Ohms of double the 8-Ohm power. Others have more-strenuous definitions.

* This requirement is what prevents many multichannel amps such as my Outlaw 770 from doubling its power continuously--each amp module is so close to the next, there just isn't enough airflow over each to remove the additional heat created by the doubled current flow.
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