Early in the development process we thought the addition of a color touchscreen might compromise cost-competitiveness, but the combined buying power of the Harman companies allowed us to leverage pricing from suppliers, meaning this feature comes at no cost premium to the buyer.
The 4x3500HD also retains the front panel USB port found on the 2-channel models, allowing users to quickly change presets when working right at the rack.
And as with all other network-enabled Crown amplifiers (when connected to a WiFi access point), users can monitor real-time performance and tweak selected parameters from anywhere in the venue using the Powered by Crown app for iOS devices, available for less than the cost of a latte and a scone.
Efficiency Matters
The 4x3500HD incorporates a new universal power supply with Power Factor Correction (PFC). The PFC circuit optimizes the power draw from the mains by making the load appear purely resistive (voltage and current in phase) so that reactive power consumption is near zero.
Working in tandem with the DriveCore output stage, this power supply quickly responds to any voltage sags or fluctuations, keeping audio output consistent and transparent on any voltage input from 85 to 264 volts AC.
Efficiency is further aided by Crown’s Class I output, a topology that has all the advantages of other switching amplifier designs but produces significantly less heat.
Our assertion is that for each dB SPL coming from the loudspeakers, the 4x3500HD uses less electricity and produces less heat than comparable DSP amplifiers. In touring applications, that translates into better reliability and reduced chance of tripping breakers on marginal venue or festival AC circuits. For venue operators, it means lower long-term operating costs.
This approach serves as a prime example of Harman’s GreenEdge initiative, using less electricity in operation, with an auto standby to reduce consumption when idle, and light weight that reduces fuel consumption in transport.
The 4x3500HD is the product of years of hard work, close cooperation with our Harman sister companies, a powerful DSP engine, and a corporate commitment to eco-friendly engineering.
All of these factors work in harmony to make it a world-class power amplifier, one that we expect will be working hard in touring rigs and permanent installations for years to come, and one that is shipping now worldwide.
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Brian Pickowitz serves as market manager for tour sound at Crown Audio.