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PHONO/AUX/CD Switch — select the input source. Even if you connected auxiliary equipment to both the PHONO and AUX/CD input jacks, you can use only one source at a time.

Speaker Push Terminals — press the appropriate tab to open a terminal. In- sert the end of a speaker wire into the opening, then release the tab to close the terminal and secure the wire (see “Connecting Speakers” on Page 7).

AC Power Cord — to use AC power, simply plug this attached cord into a standard AC outlet.

4A/12V (4-Amp/12-Volt DC Power) Jack — connect the supplied DC power

cable’s barrel plug to this jack if you want to temporarily power the amplifier from your vehicle’s 12-volt battery. Then connect the cable’s other end to your vehicle’s 12-volt accessory socket (such as a cigarette-lighter socket).

Cautions:

•Your vehicle must have a negative- ground electrical system. If you are not sure it does, check with your vehicle dealer.

•Unplug the AC power cord before you connect the DC power cable. Likewise, disconnect the DC power cable before you plug in the AC power cord.

ˆSpeakers

SPEAKER PHASING

Phasing is the direction the speaker cone moves with reference to the polari- ty of the connection wires. Proper phas- ing is important when you use more than one speaker in the same room or area. Out-of-phase speakers can lose up to one-half of their potential volume, and can have a significantly decreased bass effect.

Speakers are in phase if all the speaker cones move in the same direction when an equal signal is applied. Phasing is correct if you observe the correct polari- ty (+ to + and – to –) when connecting the speakers.

Most speaker terminals are color-coded or have a mark that indicates the termi- nal’s polarity. Usually, terminals with positive polarity are red or have a plus symbol (+), and terminals with negative polarity are black or have a minus sym- bol (–). If the speaker terminals are un- marked, follow these steps to determine their polarity.

1.Remove about 1 inch of insulation from both ends of a short piece of wire (not supplied; available at your local RadioShack store). Then twist the exposed wire to secure all its strands.

2.Connect one end of the wire to one of the speaker terminals.

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Radio Shack 811081640B, 32-2001, MPA-40 owner manual Speakers, Speaker Phasing
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MPA-40, 32-2001, 811081640B specifications

The Radio Shack 811081640B, also known as the 32-2001, MPA-40, represents a pinnacle of portable audio technology, blending functionality with remarkable sound quality. As a product of the iconic Radio Shack brand, this device showcases a commitment to delivering exceptional user experience, particularly for those who crave both convenience and audio excellence in their daily lives.

At its core, the MPA-40 is designed to cater to a diverse range of audio needs, making it suitable for both personal and professional applications. With its impressive power output, users can enjoy a robust sound that is perfect for outdoor gatherings, presentations, or casual listening at home. The portable design ensures that users can take their audio experience anywhere, whether it's a picnic in the park or a backyard barbecue.

One of the main features of the Radio Shack 811081640B is its versatility in connectivity options. It includes various input ports that allow users to connect their devices easily, ensuring compatibility with modern smartphones and tablets as well as older audio equipment. Bluetooth connectivity further enhances its functionality, enabling wireless streaming of music and other audio content directly from compatible devices.

In terms of battery life, the MPA-40 excels with a built-in rechargeable battery that offers extended usage on a single charge. This is particularly valuable for users who often find themselves away from power sources, as it allows for uninterrupted enjoyment of audio content.

The design of the MPA-40 is both practical and aesthetically pleasing, featuring a durable exterior that can withstand the rigors of outdoor use. Integrated handles and a lightweight chassis make it easy to transport, while the user interface is intuitive, allowing for seamless operation even for those less familiar with audio technology.

Additionally, the Radio Shack 811081640B includes features such as an equalizer, allowing users to adjust sound profiles according to their preferences. This customization capability ensures that everyone can enjoy their favorite music, podcasts, or audiobooks in their desired sound quality.

Overall, the Radio Shack 811081640B, 32-2001, MPA-40 is a remarkable audio solution that combines portability, power, and versatility. With its blend of advanced technology and user-friendly features, it remains a sought-after choice for audio enthusiasts looking to enhance their listening experience on the go. Whether for personal use or hosting events, this model stands out as a reliable and effective audio companion.
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