Operating the HCA-2205A, Power Switch Manual Turn On

DC Trigger Connection

This connector provides the ability to trigger your amplifier on with an external DC voltage source ranging from + 9 Vdc to +12 Vdc. With the main power switch in the off (down) position, the amplifier can be turned on with voltage from any external DC source such as the +12 Vdc trigger from the Parasound P/SP-1500 AV Processor/Preamplifier. Since it is optically coupled, the DC trigger only requires 15 mA of current to activate the circuitry and turn on the amplifier.

AC Power Connections and AC Grounding

Before you connect the AC cord, make sure your amplifier's power switch is in the off position and the external DC trigger is off. If possible, plug your amplifier directly to an AC wall outlet. Do not connect the amplifier to the accessory AC outlet on your preamplifier or processor because the amplifier's current draw exceeds the ratings of most preamplifier’s power switches and power cords. If you use an external AC line conditioner or surge suppressor, make sure it can withstand the power requirements of the amplifier listed in the specification section of this manual.

Operating the HCA-2205A

Refer to Figure #1

Power Switch

Manual Turn On

Press the upper side to turn the unit on manually; press the lower side to turn the unit off.

Automatic Turn On

When the power switch is in the off position, the power amplifier can be turned on with an external DC voltage applied at the DC trigger connector on the rear panel. (see above)

Level Controls

Each channel has its own rear mounted "set and forget" input level control. Your amplifier will sound best with these level controls set to maximum, where they are effectively out of the audio signal path. However, if your preamplifier has very high gain, and its volume control cannot track properly for left-right channel balance near its minimum position, it may be necessary to reduce the input level control settings on the amplifier. When using the HCA-2205A in a THX installation, each level control must be set at maximum to correspond to 0 dB THX reference level.

AC Line Indicator

The AC line indicator on the front panel of your amplifier lights to show you that AC is present at the AC connector. This indicates that the AC cord is connected and that power is applied to the amplifier.

Standby/Normal Indicators

When you first turn the amplifier on, the Standby indicator will light for about five seconds while the internal circuits are stabilizing. After that, the Standby indicator turns off and the Normal indicator lights to signal that the amplifier is operational.

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HCA-2205A specifications

The Parasound HCA-2205A is a powerful, multichannel power amplifier that has cemented its place among audiophiles and home theater enthusiasts since its release. Known for its robust performance, the HCA-2205A delivers an impressive 220 watts per channel into 8 ohms and 350 watts per channel into 4 ohms. This high power output, combined with its advanced circuitry, ensures dynamic and clear sound reproduction, making it an excellent choice for high-fidelity audio systems.

One of the defining features of the HCA-2205A is its five-channel configuration. This allows users to build a comprehensive surround sound system, supporting both home theater and music listening environments. The ability to power multiple channels from a single unit simplifies wiring and reduces equipment clutter, providing an efficient solution for audio setups.

The HCA-2205A utilizes a direct coupling design, bypassing capacitive coupling, which enhances its overall sound quality by minimizing distortion and preserving transient response. Additionally, it is equipped with a toroidal power transformer that contributes to its clean power delivery and improved efficiency. This design choice helps to keep the amplifier's performance consistent, even during demanding audio passages.

Moreover, the amplifier features an impressive signal-to-noise ratio, ensuring that the sound remains clean and free from unwanted noise artifacts. This is particularly important for home theaters where dialogue clarity and immersive sound effects are essential. Parasound's commitment to high-quality components is evident in the use of premium capacitors and resistors throughout the HCA-2205A, further enhancing its sonic performance.

Thermal management is another highlight of the HCA-2205A. The unit is designed with substantial heat sinks and ventilation to handle extended listening sessions without overheating. It also incorporates a fan-less design, providing a quiet operation that aligns perfectly with high-end audio environments.

In summary, the Parasound HCA-2205A stands out for its high power, cutting-edge design, and superior sound quality. With its five-channel capability, exceptional build quality, and advanced engineering, it offers a remarkable audio experience for both music lovers and home theater aficionados alike. Whether used in a dedicated listening room or as part of a comprehensive AV setup, the HCA-2205A continues to impress with its reliable performance and fidelity.