OTL amps, my pick for the tube used.

Just to be clear, that’s 100 **watts** not amps, per the manufacturer’s website. With 150 watts into 4 ohms, that’s about 6.2 amps total. Our MA-2 can do more than that.

Hi Ralph,

Before George points it out, the datasheet shown at the second link in his last post does in fact say "output current: 100 amps (continuous)," for the ME 1400/ME 1500 amplifiers referred to in that post (as opposed to the OTL amp referred to in his OP).

However, as best as I can tell from some somewhat blurry rear panel photos I found on the net there is a 5 amp fuse located immediately adjacent to the ME amp’s pendant power cord. Assuming 240 VAC (as is used down under) that would correspond to a maximum AC input of significantly less than 240 x 5 = 1200 watts, assuming reasonable derating of the fuse. Which in addition to calling into question the specified "typical" output power capabilities (e.g., 800 watts per channel into 2 ohms and 1500 watts per channel into 1 ohm, these figures stated to be "continuous and with both channels driven"), would mean that 100 amps could be continuously supplied into a load impedance of no more than 1200/(100 x 100) = 0.12 ohms. And actually much less impedance than that, given reasonable derating of the fuse and reasonable efficiency assumptions, and if two channels are to be driven.

In other words, a usage scenario that would never exist in practice.

Best regards,

-- Al

Beautiful amps, I can't afford the tubes let alone the amps though.

I have no interest in any amp that can not do at least 200 watts.
Mike

And hey! I also have no interest in any amp that can’t drive speaker loads that can vary from 2-32 ohms without becoming a tone control.
I just started this post with those pics as they are more a work of art to me rather than listened to, been down that OTL path and with SE transmission tube as well, I will never go back there again.

Cheers George

Before George points it out, the datasheet shown at the second link in his last post does in fact say "output current: 100 amps (continuous)," for the ME 1400/ME 1500 amplifiers referred to in that post (as opposed to the OTL amp referred to in his OP).

@almarg If you look at their website, they claim 100 watts into 8 ohms and 150 into 4. So I am assuming that '100 amps' is a typo, not uncommon on the web... but just for fun, since Power = R x I squared, and giving the amp the benefit of the doubt by assuming a 1 ohm load, 100 amps would work out to an amplifier that makes 10,000 watts into 1 ohms, and 40,000 watts into 4... Obviously the amp can't do that, so I'm going with Occam's Razor on this one, IOW a typo is the simpler explanation :)

However, as best as I can tell from some somewhat blurry rear panel photos I found on the net there is a 5 amp fuse located immediately adjacent to the ME amp’s pendant power cord.

Here is the ME1500 spec sheet for you Al (bmp) a bit clearer maybe.
https://ibb.co/2Fq1fPZ
https://ibb.co/HCYVmfk
https://ibb.co/XpsGYZQ

Cheers George