Manuals / Crown / Home Audio / Stereo Amplifier

Crown 600, 1200, 2401, 2400, 601, 1201 operation manual Stereo Operation, Only ONE Channel Shown

Models: 600 2400 1201 1200 2401 601

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6 Principles of Operation

6.2.1 Stereo Operation

For simplicity, the discussion of Stereo opera- tion will refer to one channel only. Mono opera- tion will be discussed later. For specific circuit references, see the block diagram in Figure 6.1.

The signal at the ¼-inch phone jack input passes directly to the balanced gain stage (U104-A and U104-B). The balanced gain stage causes balanced to single-ended conversion using a difference amplifier. From there, gain can be controlled with a potentiometer. The error amp (U104-C) amplifies the difference between the output signal and the input signal from the gain pot, and drives the voltage trans- lator stage.

From the error amp, the voltage translator stage routes the signal to the Last Voltage Amplifiers (LVAs) based on signal polarity. The +LVA

ONLY ONE CHANNEL SHOWN

(Q105) and the –LVA (Q110), with their push- pull effect through the bias servo Q318, drive the fully complementary output stage.

The bias servo Q318 is thermally coupled to the heat sink and sets the quiescent bias cur- rent in the output stage to lower the distortion in the crossover region of the output signal.

D301, D302, D303, and D304 remove the charge on the unused portion of the output stage based on the polarity of the output signal.

With the voltage swing provided by the LVAs, the signal then gains current amplification through the Darlington emitter-follower output stage.

The bridge-balanced circuit (U104-D) receives a signal from the output of the amplifier and compares it to the signal at the Vcc supply. The bridge-balanced circuit then develops a voltage

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to drive the bridge-balanced output stage. This results in the Vcc supply having exactly one half of the output voltage added to their quies- cent voltage. D309, D310, D311 and a trimmer resistor set the quiescent current point for the bridge-balanced output stage.

The protection mechanisms that affect the sig- nal path are implemented to protect the ampli- fier under real-world conditions. These conditions are high instantaneous current, excessive temperature, and output device oper- ation outside safe conditions.

Q107 and Q108 sense output current and act as a common current limiter. When instantaneous current exceeds the design criteria, the limiters remove the drive from the LVAs to limit output current to safe levels.

Figure 6.1 Circuit Block Diagram

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Operation Manual

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Crown 600, 1200, 2401, 2400, 601, 1201 operation manual Stereo Operation, Only ONE Channel Shown
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600, 2400, 1201, 1200, 2401 specifications

Crown 601, 2401, 1200, 1201, and 2400 represent a range of advanced technology products tailored for various industrial and commercial applications. Each model encapsulates cutting-edge features that enhance functionality, efficiency, and user experience.

Crown 601 is an innovative model designed primarily for warehousing and material handling. It incorporates a compact design that allows for maneuverability in tight spaces. One of its standout features is the advanced ergonomic design that reduces operator fatigue, enhancing productivity. Equipped with high-efficiency electric motors, the Crown 601 offers low energy consumption while providing a powerful performance capable of lifting substantial loads.

The Crown 2401 model is renowned for its versatility in various settings. This model features a robust construction that withstands rigorous use, making it ideal for outdoor applications. It is powered by superior lithium-ion technology, ensuring better performance and reduced downtime due to its fast charging capabilities. The 2401 model also integrates smart technology, enabling real-time tracking and monitoring through IoT connectivity. This feature empowers businesses to optimize their operations by analyzing usage patterns and performance metrics.

The Crown 1200 and 1201 models focus on maneuverability and ease of use, tailored for indoor operations. They come equipped with advanced steering systems that enable precise handling in congested areas. Additionally, the 1201 variant includes features like programmable performance parameters, which allow operators to customize the equipment’s speed and responsiveness based on specific operational needs. Both models prioritize safety, including built-in stability controls to minimize tipping hazards during operation.

Meanwhile, the Crown 2400 model stands out for its heavy-duty performance, supporting higher load capacities while maintaining operational efficiency. It incorporates advanced hydraulic systems that enhance lifting speeds and precision. The 2400's design houses features such as regenerative braking, providing additional energy savings and longer battery life.

In conclusion, the Crown 601, 2401, 1200, 1201, and 2400 represent a top tier selection in material handling solutions, each equipped with unique technologies and features designed to cater to diverse industrial needs. With their focus on ergonomics, safety, and efficiency, these models exemplify Crown's commitment to innovation and quality, ensuring optimal performance in any application.