Recent content by teemuk

It's actually just 400W @4 ohms, 0m1% THD according to Fender's own service manual, which also complies with the ICEpower module ratings. The 500W rating Fender provides on their website is bogus. Rumble 200 isn't 200 watts either, like stated on Fender website, it's actually about 160 watts...

I have never heard this. Are you sure you are not confusing "burst" and "continuous" to peak and average respectively? The thing with most class-D amps is that they can not sustain high average power output for long periods of time without overheating. Therefore manufacturers can't provide...

What base line? Most manufacturers are going to precondition the signal driving the module anyway. The way a manufacturer will do that in, say, a powered PA speaker, will be very different to, say, a guitar amp. I just gave an example that Rumble V3 amps feature Fender's unique soft clipping...

How come? It's just a module and externally to it manufacturers can perform a wealth of unique things. For instance, Fender Rumble V3 amps employ the same ICEpower modules as dozens of other manufacturers but they still implement a nice soft clipping peak limiter plus their "DeltaComp"...

I bet that was a class-AB amp. ;)

IMO, "tube watts" is equally stupid concept as attributing various output power related attributes to amplifier's operating class. Does, in your experience, mere amplifier class reveal anything about things such as - burst power output characteristics - continuous power output characteristics -...

Well, his expertise surely isn't conveyed in the video. I do put more value on forum members here who have designed both class AB and D amps for likes of Mesa, Genz Benz and Ampeg and who all will and have contradicted such stupid statements.

Class-D amp has nice squishy sag and warmth from its dynamic clipping distortion? All-tube amp is stiff and sterilely clean? :rolleyes: Ain't the test results showing exactly that? You see, all sorts of conclusions can be drawn. Personally I'd be vary of drawing too many conclusions from a very...

I guess repairing is certainly easier, no proprietary ICs, etc. but I'm not sure how many cheap consumer items like musical instrument amps are really designed from principle of easy serviceability. Often service may be as costly as the amp itself. These are not $10k items one most definitely...

And then, after 3-4 days restarts in yet another thread with the same topic.

Well, for starters, one doesn't have to be a rocket scientist to design one. It's rather trivial to come up with a decent, hum free layout for a bridge rectifier and two filter capacitors whereas an incorrectly laid out SMPS design won't only have inspectors knocking at your door searching for...

Oh, and when asked about the differences the Roland representative could have also stated the only truthful fact, which is that class-AB and class-D merely describe how output devices operate, which by itself indicates nothing specific about the amplifier's performance or overall...

Through same 8x10" cab both are sufficiently loud that folks find no need to test their headroom limits under any practical circumstance.

It's funny that now that class-D is becoming the new norm of amplification people start to attribute traits to nostalgic class-AB amps that they allegebly didn't possess before popularity of class-D. Formerly it was the nostalgic tube amps only but now it seems also class-AB amps have this...

Roughly simplified, amps have voltage gain x and output signal voltage y at which they produce their rated output power. You figure out amp's "input sensitivity", z, or input signal voltage at which the amp produces its rated output power from z=y/x If input signal level is lower than...