NOTE: Inserting a plug into the Effects Receive jack activates the Effects Blend control. The control receives this command through the ground created by the phone plug making contact with the jack. The plug must be a mono plug (tip and ground). If you have a stereo plug only, it will be necessary to tie the ring and the ground together.

COMBO CABINET JACK/PLUG ASSEMBLY

The black cable/plug assembly that comes out of the cabinet and is connected to the rear panel (near the text marked "Combo Cabinet") is the means by which the power amp in your Workingman's 2x10C sends its signal to the speaker complement. Both the plug and the jack it connects to are a special size, slightly less than the typical 1/4" found on instrument and speaker cables alike. SWR strongly recommends that you not disconnect this cable, as it is not meant to be (nor can it be) used as either an extension speaker output or a speaker cabinet input. For proper connection of an extension speaker to your Workingman's 2x10C, please read below.

EXTENSION SPEAKER OUTPUT SECTION

This section of the manual will deal with the proper connection of extension speaker cabinets to the power amplifier in the Workingman's 2x10C. We recommend that you read this section carefully, as power amplifiers, impedance and speaker cabinets are all crucial in determining how best to operate your new Workingman's 2x10C with an extension speaker cabinet.

HOW IMPEDANCE AFFECTS POWER RATINGS

People often have questions about impedance. What is it? The root of the word "impedance" is the verb "impede," which means to block or resist. That's what impedance is − resistance to power.

Solid-state power amps do not have a pre-determined impedance. They deliver power at whatever impedance the speaker cabinet tells it to. That's why you hear the term "slave amp" − amplifiers only do what they're told. So if someone tells you that they have a "4 ohm power amp," their terminology and understanding of the concept is way off the mark.

Unlike power amps, every speaker cabinet has a pre-determined impedance rating measured in "ohms." In most cases this rating is either 4 or 8 ohms (though there may still be some old 2 ohm creakers out there). The higher the impedance of the speaker cabinet, the more resistance to power it will offer. The lower the resistance of the speaker cabinet, the less resistance to power it will offer. In other words, HIGHER IMPEDANCE MEANS LESS POWER CAN ENTER THE SPEAKER CABINET. LOWER IMPEDANCE MEANS MORE POWER CAN ENTER THE SPEAKER CABINET.

You may be thinking that you've found the solution to the universe − just use speaker cabinets with really low impedances and you can get skull-crushing power out of your amplifier, right? Wrong. There's a catch. Power amps have limits as to how low an impedance they can drive safely. This is what's known as an amplifier's "Minimum Impedance Rating." If you try and operate a power amp below its minimum impedance rating, it will give you lots and lots of power for about five minutes…and then overheat, short out and fail com- pletely. In other words, THE LOWER THE OPERATING IMPEDANCE OF THE AMPLIFIER, THE HOTTER IT WILL GET.

WORKINGMAN'S 2X10C POWER AMPLIFIER MINIMUM IMPEDANCE RATINGS

Here's what this means to the power amp in the Workingman's 2x10C. Like most combos, the Workingman's 2x10C contains a mono power amp, which makes things fairly simple. The operating impedance of the internal speaker system in your Workingman's 2x10C is 8 ohms, so that's your starting point. When you add an extension cabinet to the Workingman's 2x10C, invariably the total operating impedance of the amplifier will get lower. The Minimum Impedance Rating of the Workingman's 2x10C is 4 ohms. This means that you can safely connect to the extension speaker jack:

-One 8 ohm speaker enclosure (4 ohms total impedance)

-Two 16 ohm speaker enclosures (4 ohms total impedance)

Operation at 4 ohms will provide 400 watts, a nice increase over the 260 watts available when used in a stand-alone configuration. But as previously mentioned, the lower the operating impedance, the hotter the amplifier will run. An amp that runs at or near its mini- mum impedance all the time may wear the life of its components faster than normal. Furthermore, damage to the power amplifier

WORKINGMAN’S 2X10C • 11

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SWR Sound 2X10C Extension Speaker Output Section, Combo Cabinet JACK/PLUG Assembly, HOW Impedance Affects Power Ratings
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2X10C specifications

The SWR Sound 2X10C is a powerful and versatile bass cabinet designed for both studio sessions and live performances. With its compact size and lightweight design, it is an ideal choice for musicians seeking portability without sacrificing sound quality. The cabinet features two 10-inch custom-designed speakers, specifically engineered to deliver a balanced tonal range and impressive low-end response.

One of the standout features of the 2X10C is its high power handling capability, allowing it to handle up to 400 watts RMS. This ensures that even when pushed to its limits, the cabinet maintains clarity and punch, crucial for any live show or recording environment. The cabinet is also equipped with a high-efficiency horn tweeter, which enhances the higher frequencies and provides a sparkling top-end that complements the rich tones produced by the 10-inch woofers.

The cabinet utilizes SWR's proprietary technologies to enhance performance. The "Bass Reflex" design features strategically positioned ports that help to eliminate unwanted air turbulence while maximizing low-frequency response. This design not only promotes deeper bass tones but also allows the cabinet to remain lightweight, making it easier for musicians to transport.

Another key characteristic of the SWR 2X10C is its rugged construction. Built from durable materials, the cabinet is designed to withstand the rigors of both touring and frequent use. Reinforced corners and a heavy-duty grille protect the speakers from potential damage, ensuring the longevity of the cabinet.

For connectivity, the 2X10C comes with dual 1/4-inch input jacks, enabling easy integration with various amplifiers and allowing for daisy-chaining additional cabinets if more sound output is required. The cabinet is compact enough to fit into most environments, making it a versatile option for a range of musical genres.

In summary, the SWR Sound 2X10C combines advanced features, innovative technology, and robust build quality, making it an exceptional choice for bass players looking for a reliable cabinet that delivers impressive sound across various settings. Whether in a rehearsal space, a studio, or on stage, the 2X10C stands out as a top-tier option that meets the demands of modern musicians.
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