'burst' power for torroidal amps?

There is nothing wrong with the Powersoft K 10 if you are using loads ranging from 8 - 4 ohms in stereo mode. From my experience it seems to offer the most watts, long-term under those conditions. You may even find your drivers will burn up before reaching the amplifier’s clipping point.

Under 2-ohm per channel conditions requires more current, which means the power supply, would need to be larger. Larger Transformers cost more and weigh more, which, goes against many who are looking for a lightweight amplifier at an affordable price.

To achieve 6000 watts per channel in 2-ohm loads using the continuous average power method, which is common with older designs, would require at least a single 15 or dual 7.5-kVA toroidal transformers. Bear in mind the Crest 10,001 would be classed as a lightweight amplifier compared to such a monstrosity.

I am not familiar with switch-mode power supplies. I would imagine using that topology would offer a much lighter unit. Possibly 49 kg
   

Best Regards,

Jake_Fielder wrote: DjLeco wrote: OLD schools amplifiers, heavy but sure and with constant output power.   Personally I kept mines Crown Macrotech 5000VZ ,91 Vrms at output on EACH CHANNEL/4 ohm resistive dummy load for minim 30 minutes of bench, both CH delivering with slightly IOC led blinking, showing a little more than 0.05% distorsion.   IDEALLY for subwoofers 25-63 Hz.   so over 2k..   What frequency did you use for this test?

Edited by DjLeco - 31 July 2009 at 2:18pm

tallmike wrote: Hi Rog, but if an amp draws current consumption back after a few seconds then I think that's perfectly acceptable.

Surely then, that amp should not be rated at the same power, as one that does not?

If amplifier A can reproduce a 40hz sinewave at full power without cutting out, or limiting current, or reducing output, surely amplifier B should be rated at a lower power, if it cannot perform the same task?

Jake_Fielder wrote: yeah but say for another example:

If you paid £3200 for a lightweight amp rated @ 3000W per channel @ 4 ohms, wouldn't you feel ripped off, if your mate's £1600 Inf8 MK2 blew it away on sub on the same stack?


Edited by levyte357 - 03 August 2009 at 8:32pm

levyte357 wrote: Jake_Fielder wrote: yeah but say for another example: If you paid for £3200 for a lightweight amp rated @ 3000W per channel @ 4 ohms, wouldn't you feel ripped off, if your mate's £1600 Inf8 MK2 blew it away on sub on the same stack?

minaximal wrote: if someone here can show me a track that has constant sinewaves close to 0db that can make my mc2 e45 dissapoint on four pd1850's, then i'd like to hear it!

I don’t think it is the track but more the user that is going to drive the amplifier into clipping with no remorse.

Using an amplifier @ 2 ohms per channel is not what I would consider headroom from amplifier’s perspective yet, many will do it by choice and are not happy until every LED indicator is lit.

Best Regards,