One of the companies that has always been present in the manufacture of high-power amplifiers is Germany's Camco, which, after its famous DX series, introduced the Vortex series a few years ago, becoming one of the first companies to make digital power amps, with low weight and small size. The Vortex series includes the Vortex 2.6, the Vortex 4, the Vortex 6, the Vortex 3 Quadro (4 channels) and the new Vortex 200V, notable for delivering up to 200 V of output.
The amp we're looking at now, the Vortex 6, is Camco's most versatile and, at the same time, most powerful amplifier (not counting the 200V). The main difference from the 200V is that the latter can't produce as considerable an increase in power as the Vortex 6 when working below 4 ohms, but it does surpass it in power delivered at 4 and 8 ohms.

In addition, this series of amplifiers offers full control and monitoring via an Ethernet network, so you can change their functions and know at all times how each channel is working and what temperatures they're reaching.

Of all the amplifiers I'm covering, this is the one I usually use, since I mainly work with Nexo and they recommend installing these amps to "drive" their systems. That's why I'll share my personal experience with them later on.

Technical specifications
This amplifier delivers an output per channel of 1,350 W at 8 ohms, 2,300 W at 4 ohms and 3,100 W at 2 ohms, per channel and measured at 1 kHz. In Bridge mode we get 4,600 W at 8 ohms, and 6,600 W at 4 ohms in Parallel-Mono mode, also measured at 1 kHz.

It should be noted that the fundamental difference between this amp and others I've seen is that as we lower the impedance, the output power increases quite substantially, like the Digam K, so that when we bridge speakers of the same characteristics in parallel, we increase their performance more effectively. Keep in mind that if the difference in power delivered by an amp between 8 and 4 ohms is small, you'd need to consider whether it will work for running at 4 ohms with speakers we usually use at 8 ohms, or whether we need to think about using another, more powerful amp.

The input impedance is 40 kohms, balanced.

Voltage gain is selectable at 32 dB, 26 dB or 1.4 V input sensitivity.

The signal-to-noise ratio is > 107 dB, measured at 1 kHz.

The inputs on this amp are XLR, with XLR link outputs as well, and the outputs are just two 4-pole Speakons (one with channel A on +1/-1 and channel B on +2/-2, and the other the other way around).

The damping factor is over 400 at 1 kHz and 8 ohms.

The Vortex series is equipped with a system of microcontrollers that handle the digital control and monitoring of all functions to achieve first-class sound quality.

They also feature an internal forced-air cooling system with especially large heat sinks.
The Vortex series has a large number of measures to protect both the speakers it drives and the amp itself, most notably an overvoltage protection system capable of withstanding up to 400 V.

In addition, a switch on the rear panel lets us choose whether or not to use the built-in internal limiter.

Finally, it has two RS-485 ports for connecting to a computer via Ethernet for control and monitoring.

This amplifier weighs just 12.2 kg.

Pros and cons
After three years of using these amps, I can say I'm very happy with how they work and perform. I've been able to see that when running at three or two ohms, performance doesn't drop at all, and it gives you more punch without having to resort to other, more powerful amps, which come up short when bridging several cabinets.

Operating this amp is extremely simple, since once the voltage gain and limiter are set, you only have to raise or lower the volumes. I've also seen that, with normal ventilation, simply by leaving the front and rear panels uncovered, you get very high heat dissipation, even when working at full capacity. Unfortunately, I haven't been able to have these same experiences with the other amps I discuss, but of course, that requires working with them on a continuous basis.

The main disadvantage of these amps compared with others we've looked at is that we can't get power levels as high as those delivered by Crown's I-Tech or Powersoft's Digam K, although I don't think there are many systems that can take that much power. In any case, with the new Vortex 200V you already get 3,100 W per channel at 4 ohms. Compared with the Digam, this amp takes two rack units instead of one, though I'd like to be able to see how such a high-power amp responds with such a compact build.

The main advantage I see in the Vortex 6 over the other amps I analyze is that it has the best power-to-price ratio, although the K6 beats it in power-to-impedance ratio and the I-Tech is of higher quality.