Polarity, Minimum Impedance Precautions

Home Theater Configurations and Input Connections

Refer to Figure #1 or Figure #2

Your Parasound multi-channel amplifier is designed to deliver the same power and sonic characteristics to the Left, Center, Right, and both Surround speakers of your home theater system. For additional low frequency response, you should also install a powered subwoofer. Even though all the channels of your amplifier operate identically, we recommend the following configuration to make it easier to identify each channel in case you ever need to troubleshoot your system.

∙Connect the right front output of your processor to INPUT 1 of your HCA-1205A or HCA-855A.

∙Connect the left front output of your processor to INPUT 2 of your HCA-1205A or HCA-855A.

∙Connect the center output of your processor to INPUT 3 of your HCA-1205A or HCA-855A.

∙Connect the right surround output of your processor to INPUT 4 of your HCA-1205A or HCA-855A.

∙Connect the left surround output of your processor to INPUT 5 of your HCA-1205A or HCA-855A.

∙Connect the subwoofer output of your processor to the input of your powered sub or sub amplifier.

Speaker Connections

You can connect speaker cables to the amplifier's rear mounted 5-way binding posts using speaker wire terminated with 1/4" spade lugs or banana plugs. You can also insert bare wire up to AWG 12 into the holes on the sides of the binding posts. If you use bare wire, remove only about 1/2" of insulation and twist the wire's strands tightly to prevent strays that could cause a short circuit. (You may want to "tin" the stripped wire with solder to prevent it from fraying and oxidizing.)

Polarity

When you connect speakers to your amplifier, you will notice that one side of the two conductor speaker wire will have some sort of mark: either printing, a raised ridge on the insulation, or a different color of conductor. The marked insulation or copper colored wire usually indicates the positive conductor. This demarkation lets you know which wire is connected to the positive and which to the negative speaker terminals so you can do exactly the same on the power amplifier's colored (+) and black

(-) binding posts.

Minimum Impedance Precautions

Connect loudspeakers with a 4 Ω or 8 Ω nominal impedance for normal operation. Both amplifiers are capable of driving speakers with occasional impedance dips below 2 Ω. However, sustained high power operation into loads of less than 4 Ω may cause overheating and is not recommended.

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 will exceed the rating 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.

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HCA-1205A specifications

The Parasound HCA-1205A is a highly regarded audio power amplifier known for its exceptional performance and versatile applications. Designed to deliver high-quality, reliable power to a range of audio systems, the HCA-1205A is particularly favored by audiophiles and home theater enthusiasts.

One of the standout features of the HCA-1205A is its five-channel configuration, allowing it to effectively drive multiple speakers while maintaining a compact footprint. Each channel is rated at 120 watts into 8 ohms and can deliver up to 200 watts into 4 ohms, providing ample power for a wide range of speaker types and impedances. The amplifier's robust power output ensures dynamic sound reproduction across all audio frequencies, translating to a compelling listening experience.

The HCA-1205A employs advanced circuit design, including a high-current, Class AB topology. This design strikes a balance between efficiency and sound quality, delivering clean, distortion-free amplification even during demanding playback scenarios. The amplifier incorporates large power supplies and heavy-duty output transistors, which contribute to its ability to drive low impedance loads without compromising performance.

Another notable feature of the HCA-1205A is its thermal management system. Equipped with large heat sinks and an advanced cooling design, the amplifier remains cool even during extended use, ensuring reliability and longevity. The inclusion of short-circuit and thermal protection circuits further enhances safety, preventing damage under adverse conditions.

Connectivity is made convenient with various input options, including RCA connections and balanced XLR inputs. The amplifier's rear panel features a range of output binding posts, allowing for flexible speaker connections and easy integration into existing audio setups. Additionally, the HCA-1205A supports bridged operation for increased power output in specific configurations.

Parasound is known for its commitment to quality, and the HCA-1205A is no exception. Its build quality is robust, featuring a sturdy chassis that minimizes vibration and interference. The amplifier's aesthetic design, with a sleek finish and informative front panel, fits seamlessly into any modern audio or home theater environment.

In summary, the Parasound HCA-1205A is a powerful and versatile audio amplifier that stands out due to its exceptional sound quality, advanced technological features, and reliable performance. Whether for a robust home theater setup or a high-fidelity audio system, the HCA-1205A is an excellent choice for those seeking to elevate their listening experience. Its combination of power, efficiency, and flexibility solidifies its status as a preferred amplifier among audio enthusiasts.