Heathkit-as-2a-acoustic-suspension-speaker-system-assembly MANUAL – Manual (PDF)

The Heathkit Model AS-2A Speaker System manual provides detailed instructions for assembly, operation, and troubleshooting of the acoustic suspension speaker system, including information on resistor and capacitor color codes, proper soldering techniques, and step-by-step assembly procedures. It also covers the installation of speakers, wiring of the crossover network, and checking for air leaks, ensuring optimal performance and sound quality.

• Brand: Heathkit
• Model: MANUAL
• Type: manual
• File size: 7.0 MB

Manual Overview

The Heathkit Model AS-2A Speaker System manual provides detailed assembly and troubleshooting guidance for technicians. It includes a comprehensive explanation of resistor and capacitor color codes, essential for identifying component values during repairs. The manual outlines a step-by-step assembly process, including parts mounting, wiring, and installation of components like fiberglass and speakers. For troubleshooting, the manual suggests checking connections and verifying component values using the provided color codes. Calibration involves adjusting the midrange and high-frequency levels using the built-in controls. The crossover network, consisting of coils and capacitors, is crucial for directing frequencies to the appropriate speakers, and any issues here may require checking these components for faults or incorrect wiring. The manual emphasizes the importance of proper soldering techniques and provides guidance on checking for air leaks in the cabinet, which can affect acoustic performance. For board-level repairs, technicians are advised to refer to the schematic diagram included in the manual.

Quick Issues Covered

• Calibration of crossover network for optimal frequency response.
• Diagnosing power-up failures in AS-2A speaker system.
• Schematics for tracing circuit paths and connections.

Overview

The Heathkit Model AS-2A Speaker System is designed to provide excellent wide range audio reproduction from a relatively small enclosure. It uses an Acoustic Suspension System developed and licensed by Acoustic Research Incorporated, which reduces harmonic distortion by allowing the woofer cone to ride on air instead of mechanical springs. The system includes a crossover network with a coil and capacitors to filter and direct frequencies to the appropriate speakers. The cabinet is available in an attractive walnut finish or unfinished, and the system is designed to be assembled by the user.

Specifications

• Frequency Response +5 db from 40 to 20,000 eps
• Crossover Frequencies 2000 cps and 7500 eps
• Recommended Amplifier Power 20 to 40 watts rms
• Nominal Impedance 8 ohms
• Super Tweeter 1-3/8" dome type
• Midrange Two 5" cone type
• Woofer 10" acoustic suspension; 1.1 lb alnico magnet; resonant frequency (mounted) 58 cps
• Crossover Type Coil-capacitor network
• Damping Factor Unity
• Horizontal Dispersion 90 degrees
• Cabinet Dimensions 24" wide x 13-1/2" high x 11-3/8" deep
• Material 3/4" furniture-grade plywood, with chipboard front and rear panels
• Finish Walnut or unfinished
• Net Weight 36 lbs
• Shipping Weight 40 lbs

Controls & Indicators

Refer to the PDF for details.

Installation / Setup

Refer to the PDF for details.

Operation

Refer to the PDF for details.

Troubleshooting & Error Codes

Refer to the PDF for details.

Safety & Warnings

Refer to the PDF for details.

Download MANUAL Manual (PDF – 7.0 MB)

Heathkit AS-2A Speaker System Manual: 7.0 MB PDF for assembly and setup instructions.

• Brand: Heathkit-as-2a-acoustic-suspension-speaker-system-assembly
• Model: MANUAL
• Type: Manual
• File size: 7.0 MB

Overview

Brief overview of the product.

Specifications

• Key spec 1
• Key spec 2

Controls & Indicators

Control panel/button layout.

Installation / Setup

1. Step 1…
2. Step 2…

Operation

Basic usage, modes, cycles.

Troubleshooting & Error Codes

Safety & Warnings

• Important warning…

Downloads

Download MANUAL manual (PDF)

Heathkit AS-2A Acoustic Suspension Speaker System Overview

The Heathkit AS-2A Acoustic Suspension Speaker System is a high-fidelity audio speaker designed to deliver clear, balanced sound with enhanced bass response. Utilizing an acoustic suspension design, this speaker system provides tight, accurate low-frequency reproduction, making it ideal for audiophiles and home audio enthusiasts seeking superior sound quality from their stereo setups.

Main Features and Specifications

• Acoustic suspension design for precise bass control
• Two-way speaker system with a woofer and tweeter
• Nominal impedance: 8 ohms
• Frequency response range: 40 Hz to 20 kHz
• Power handling capacity: up to 30 watts RMS
• Compact cabinet dimensions for easy placement
• High-quality crossover network for smooth audio transition

Basic Usage and Operation Tips

For optimal performance, position the speakers at ear level and maintain an equal distance from the primary listening position. Avoid placing the speakers too close to walls or corners to reduce unwanted resonance. Connect the speakers to an amplifier or receiver matching the recommended power handling specifications. Break in the speakers by playing audio at moderate volume for several hours to enhance sound quality over time.

Troubleshooting and Maintenance

If you experience distorted sound or no output, first check all cable connections and ensure the amplifier is functioning properly. Inspect the speaker cones for any visible damage or debris. Clean the speaker grilles periodically with a soft brush or cloth to prevent dust buildup. Avoid exposing the speakers to extreme temperatures or humidity, which can degrade components.

Safety Reminder

Always disconnect the speaker system from power sources before performing any maintenance or inspection. Use caution when handling speaker components to prevent damage. Keep the speakers away from moisture and avoid placing heavy objects on top of the cabinets to ensure safe and reliable operation.