Radio Shack 811081640B, 32-2001, MPA-40 Controls and Operation, PHONO/AUX Source Mixing Control

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32-2001.fm Page 11 Friday, February 4, 2000 7:53 AM

3.Connect a wire from the speaker’s positive (+) terminal to the trans- former’s secondary tap that matches the speaker’s total imped- ance (4, 8, or 16 ohms).

4.Connect a wire from the speaker’s negative (–) terminal to the COM tap on the transformer’s secondary side.

ˆControls and Operation

MICROPHONE 1 and 2 Inputs — con- nect any standard dynamic micro- phones.

POWER Switch and Indicator — press the bottom half of the switch to turn on the amplifier. The indicator lights. Press the top half of the switch to turn off the amplifier. The indicator goes off.

MASTER VOLUME Control — controls the overall loudness level of all sources equally. With the amplifier turned on and the audio input source turned on (and set to play, if needed), set this control to its mid-range setting (5). Adjust this con- trol again after adjusting the source mix- ing controls.

Caution: Be careful not to raise the vol- ume level too high. Doing so might over- load the system.

MIC 1 and MIC 2 Source Mixing Con- trols — adjust the input level for each of

the two microphones to get the proper volume and balance.

PHONO/AUX Source Mixing Control

—adjusts the input level of the PHONO or AUX/CD sound source for the best volume and balance.

TONE Control — adjusts the sound quality according to the speakers, sound source, and room acoustics. Turn TONE toward LOW to adjust the sound toward

alow-frequency tone, or toward HIGH to adjust it toward a high-frequency tone.

Notes:

•Leaving TONE set to HIGH produces a flat, unadjusted tone.

•If feedback occurs, turn TONE toward LOW or turn down the vol- ume.

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Contents MPA-40 20-Watt PA Amplifier Contents Five Speaker Terminals make FeaturesChoosing a Location Presetting ControlsPreparation Making ConnectionsSpeaker Phasing SpeakersDetermining Total Speaker Impedance One Speaker Connecting SpeakersSpeakers in Series Multiple Speakers with Transformers Taps PHONO/AUX Source Mixing Control Controls and OperationTroubleshooting Replacing Fuses Care and MaintenancePhono SpecificationsFm Page 15 Friday, February 4, 2000 753 AM RadioShack

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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