R&C on Lightweight Amps - Power ratings

in theory though, instantaneous current draw is likely to be just as high, if not higher than a heavyweight amp with lots of capacitance......?

saul wrote: in theory though, instantaneous current draw is likely to be just as high, if not higher than a heavyweight amp with lots of capacitance......?

The way the lightweights were clipping, while the Inf8 was cruising, just seems they were limiting themselves because PSU just couldn't draw enough current to reproduce the bass downto 35hz, across 4x scoops, at high power..

And I've heard Rens home made amp do that with ease across 8x scoops, "all night"

ah yes of course, SMPS current limiting.....


yeah - "THE MACHINE" platinum is beastly

levyte357 wrote:

NITZ V1505 wrote: Could it be the amps in question can deliver their stated outputs at 1khz but on very low frequencies fail to impress. Especially when playing Roots/Dub music where the bass notes require the amp to be able take sustained punishment all night without breaking a sweat.

Don't get me wrong, some of them did sound nice, but started clipping when driving low freqs & turned up..

Some even shut down... :lol:

Exactly what I was getting at . On the low's driven hard they run out of steam.

levyte357\n

the lie-weights

smiley36

have been pondering this issue for a while now - differences in charge storage and recovery - for Amplifier Power Supplies. Fits in also with some manufacturers quoting peak short term output figures, instead of continuous which this thread is looking at.

We still have a 'restriction' inherent in Transformer coupled supplies, which applies to Switch Mode ones, which is the portion of each half cycle of AC mains supply as it approaches zero.

Now from what I've seen, the main storage capacitors used in Amplifiers with SMPS's are smaller in value than for the Transformer supply ones (generalisation) whilst the Mains Supply 'low voltage' part of the AC waveform remains the same; so re-charging may be similarly compromised by high Amplifier output at frequencies close to Mains frequency due to a smaller charge stored? (over simplified as some other things apply)

Might investigate this further in due course.........

Hope this makes sense in a non-technical sort of way!
Mik

In all honesty why bother? If you have four scoops, four kicks and some mids, then use a heavyweight on your scoops and lightweights on the rest.
We are talking 30kg extra or so then, thats all. Put the big amp in a separate case and the problem is solved.

The problems will start when ONLY lightweights are available, not a nice thought.

nickyburnell wrote: In all honesty why bother? If you have four scoops, four kicks and some mids, then use a heavyweight on your scoops and lightweights on the rest.
We are talking 30kg extra or so then, thats all. Put the big amp in a separate case and the problem is solved.

+10

Just a shame though, as it seemed some lightweights could cure the problem of some biggish venues needing 4x subs to cover approx 500 people, but only ropey droopy ring mains & 13A sockets available...

There is a known transformer amp solution for this (eh Saul smiley2 ), but carrying 14kg current efficient lightweight, which could still do the notes downto 35hz across 4x subs with force, would have been bliss..

levyte357 wrote: There is a known transformer amp solution for this (eh Saul smiley2 ), but carrying 14kg current efficient lightweight, which could still do the notes downto 35hz across 4x subs with force, would have been bliss..

lol only just saw this

there sure is... smiley16