LOW-Z INPUT (9)

Aconventional 3-pin, female XLR input jack is provided and may be used as the channel input. When the (PL-2) line balancing transformer is not used, this XLR input becomes Quasi-Balanced with pin #3 as the positive input (connect- ing to the tip of the l/4” input jacks above), pin #2 as the negative input (connecting to the floating sleeve of the l/4” input jacks above), and pin #l going to the internal power amplifier ground. When the (PL-2) line balancing trans- former is used, this XLR input becomes fully Transformer-Balanced (Pin #3 positive, pin #2 negative, pin #I ground). (See the PL-2 SELECTOR SWITCH section (next) for details on related settings.)

PL-2 SELECTOR SWITCH (10)

This switch is used in conjunction with the PL-2 transformer to allow the LOW-Z INPUT to function with or without a PL-2 module being inserted in the receptacle. The “out” position of this switch selects the Quasi-Balanced mode of operation for the LOW-Z INPUT (XLR jack), and routes the input signal directly to the HI-Z INPUT jacks. In this position the HI-Z INPUT jacks may be used as outputs after the LOW-Z INPUT to allow patching this signal to another input on this amp. Normally, in this switch position, a (PL-2) transformer is not present (“out”) in the transformer receptacle; however, if one were “in” the receptacle, the LOW-Z INPUT would still be Quasi-Balanced. It becomes fully Transformer-Balanced only when the “in” switch position is selected. Notice this is a very effective means to “test” for the necessity of a line-balancing transformer. The “in” position of the switch routes the signals from the XLR jack through the (PL-2) line-balancing transformer, thereby selecting the Transformer-Balanced mode of operation for the LOW-Z INPUT. In this position the HI-Z INPUT jacks may be used as outputs after the line balancing transformer to patch the signal to another input jack on this amplifier or other amps/equipment. If the “in” position is selected without a (PL-2) line-balancing transformer “in” the receptacle, the LOW-Z INPUT will be rendered inoperable.

TRANSFORMER RECEPTACLE (11)

This receptacle only receives the optional (PL-2) line-balancing transformer. When conditions exist that demand the usage of a Transformer-Balanced XLR Input for either or both channels, then the (PL-2) transformer must be put here, and the selector switch must be in the “in” position.

MODE SWITCH (12)

This switch is used to select either Stereo or Bridge mode operation. When BRIDGE mode is selected, the channel B LED power indicator will go out indicating Bridge mode has been selected. Accidental selection of this mode could damage loudspeakers. Bridge mode will be covered in more detail later in this manual.

HIGH-Z INPUT JACKS (13)

Two parallel (bridged) input jacks are provided for each channel. This allows for one to be used as a conventional input, and at the same time the other to be used as a “line out” (Y-cord) to connect to another input jack on this ampli- fier or other amps/equipment. These l/4” jacks are not “chassis grounded” and when used will provide a Quasi-Balanced input capability due to a unique “ground loop” elimination circuitry associated with the inputs. This feature will normally allow “hum free” operation when relatively short l/4” cable patches are made between the various jacks on this amp and other jacks on various other equipment that share the same rack with this amplifier. This Quasi-Balanced capability is automatic and cannot be removed from the system’s circuitry.

DDTTM COMPRESSION SWITCH (14)

This switch is used to either ENABLE or DEFEAT the DDT compressor. The DDT function will be covered in more detail later in this manual.

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Peavey CS 1800G manual LOW-Z Input, PL-2 Selector Switch, Transformer Receptacle, Mode Switch, HIGH-Z Input Jacks

CS 1800G specifications

The Peavey CS 1800G is a powerful and versatile professional power amplifier that is well-suited for a wide range of audio applications. Known for its robust construction and high-quality sound output, the CS 1800G stands out in the Peavey lineup, making it an ideal choice for touring musicians, DJs, and audio engineers alike.

One of the main features of the CS 1800G is its impressive power output, delivering 900 watts per channel at 4 ohms in stereo mode, and up to 1800 watts in bridged mono mode. This substantial power ensures that the amplifier can drive even the most demanding speakers while providing clear and dynamic sound reproduction across various performance settings.

The CS 1800G incorporates Peavey's proprietary TransTube technology, which enhances the amplifier's ability to provide warm, tube-like tones. This feature has been engineered to deliver a richer tonal character compared to many traditional solid-state amplifiers, giving performers and sound engineers more flexibility in crafting their sound.

In terms of its technical design, the CS 1800G comes equipped with advanced protection circuitry, ensuring the amplifier remains safe from overheating, short circuits, and other potential hazards that could affect performance. Additionally, the unit features comprehensive LED indicators that provide essential feedback on performance status, including signal presence and clip indicators.

The amplifier’s rear panel offers a variety of connectivity options, including balanced XLR and ¼-inch inputs, as well as Speakon and binding post outputs. This flexibility allows for easy integration into any audio system, making it suitable for both live sound applications and installation environments.

Weighing in at 22.4 pounds, the CS 1800G strikes a balance between portability and power, making it manageable for transport without compromising on performance quality. This durable build is complemented by a rugged metal chassis, designed to withstand the rigors of touring and professional use.

Overall, the Peavey CS 1800G is a reliable and powerful amplifier that combines cutting-edge technology, robust performance, and user-friendly features, making it a top choice for anyone in search of high-quality audio amplification. Whether for concerts, events, or permanent installations, the CS 1800G delivers the performance and flexibility needed for diverse audio needs.