Radio Shack 85 owner manual Connecting Two Unbridged Speakers and One Bridged Subwoofer

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12-1977.fm Page 19 Tuesday, July 13, 1999 10:07 AM

Connecting Two Unbridged Speakers and One Bridged Subwoofer

1.Connect the two speakers to the CH1 and CH2 terminals (front speakers) or to the CH3 and CH4 terminals (rear speakers).

2.For a bridged connection, connect the subwoofer to the amplifier’s + CH3 and CH4 + terminals (if you used the front speaker connections in Step 1) or the + CH1 and CH2 + terminals (if you used the rear speaker connec- tions in Step 1).

3.Push in X-OVER FREQ so you can later adjust the amplifier’s sound to com- pensate for your vehicle’s acoustics (see “Using the Frequency Cross- over”).

4.Press and release the right BRG/ST (Bridged/Stereo) switch to make sure it is off.

5.Push in the left BRG/ST (Bridged/Stereo) switch to the BRG position to bridge the rear speakers (CH3 and CH4).

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Contents 85 × 4 High Power 4-Channel Trunk Mount Amplifier Automatic Thermal Protection FeaturesMute Turn On Circuit eliminates Contents Preparation Before YOU Begin the InstallationChoosing a Mounting Location Connecting Ground and PRIMARY/SWITCHED Power Illus please add a dwg that illustrates step Low Level Input Connections Connecting to Your Autosound SystemFm Page 9 Tuesday, July 13, 1999 1007 AM Fm Page 10 Tuesday, July 13, 1999 1007 AM High-Level Input Connections Floating Ground Connection Common Fm Page 13 Tuesday, July 13, 1999 1007 AM Preparing the Speaker Wires Connecting the SpeakersConnecting Four Speakers Connecting Two Speakers Unbridged Connection Connecting Two Speakers Bridged Connection Fm Page 18 Tuesday, July 13, 1999 1007 AM Connecting Two Unbridged Speakers and One Bridged Subwoofer Testing the Connections Mounting the Amplifier Fm Page 22 Tuesday, July 13, 1999 1007 AM Operation Setting the Level ControlTurning on the Amplifier Over Freq On/Off Switch Using the Frequency CrossoverOver Freq Control Maintenance Replacing the Tube-Type Fuse Replacing the FusesReplacing a Blade-Type Fuse Specifications Radio Shack

85 specifications

Radio Shack 85, often referred to as the TRS-80 Model 100, was a remarkable portable computer introduced in the early 1980s. This compact device was designed primarily for business professionals and writers, embodying cutting-edge technology that set it apart from its contemporaries. With its sleek and lightweight design, the Radio Shack 85 became one of the first truly portable computers, providing users with the ability to work on the go.

One of its standout features was the full-sized keyboard, which offered a comfortable typing experience. The keyboard was designed with functionality in mind, including dedicated function keys that made it easier to access essential commands. The built-in LCD screen, although monochrome, delivered clarity and visibility that was impressive for its time. The screen provided a resolution of 64x16 characters, making text reading and editing straightforward.

The Radio Shack 85 operated on a Zilog Z80 microprocessor, running at a speed of 5 MHz. This processor delivered solid performance for the applications and tasks typical of the era, including word processing and basic data management. Users could store their data on the internal 32 KB of RAM, which was expandable to 64 KB, a significant amount for the time. For data storage, the device featured a built-in cassette tape interface, allowing users to save and load their work conveniently.

In terms of software, the Radio Shack 85 came pre-loaded with several basic applications, including a word processor and a simple spreadsheet program. It also had the capability to run other software written for the TRS-80 line, giving users access to a broader range of applications. Its compatibility with the TRS-DOS operating system helped users transition from other TRS-80 models without significant hurdles.

Power efficiency was another notable characteristic of the Radio Shack 85. The device could operate on just four AA batteries, allowing for hours of productivity without needing a wall outlet. This feature made it an ideal companion for those who traveled frequently or worked in remote locations.

Overall, the Radio Shack 85 was a groundbreaking device that combined portability, functionality, and efficiency. Its combination of a comfortable keyboard, a capable processor, and a lightweight design paved the way for future portable computing innovations, leaving a lasting legacy in the technology landscape.