Vibe Powerbox Micro POWERBOX 400.1M

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Summary

Mounting Guidelines

Power Connections

Details on connecting power supply, including fuse placement.

Low Level Input

Instructions for connecting audio source via RCA cables.

High Level Input

Instructions for connecting audio source via speaker outputs.

Installation Details

Power and Ground Cables

Specifications for power and ground cable gauge and routing.

Auto Turn On Feature

Explanation of the Autosense circuit for automatic amplifier activation.

RCA Cable Installation

Advice on routing RCA cables to prevent interference.

Terminals and Connections

Input and Control Terminals

Details on RCA inputs, gain, remote, bass boost, and LPF controls.

Power and Speaker Outputs

Information on power input terminals and speaker output connections.

Status Indicator LED

Explanation of the power and protection indicator light.

Wiring Configurations

Dual Subwoofer Wiring

Diagram and explanation for wiring two subwoofers to the amplifier.

Single Subwoofer Wiring

Diagram and explanation for wiring one subwoofer to the amplifier.

Set Up Section

Gain Control Setup Routine

Step-by-step guide for setting the amplifier's gain to match the source unit.

Subwoofer Crossover Setting

Recommendations for setting the low-pass crossover frequency for subwoofers.

Technical Support

UK Technical Enquiries

Contact information and hours for UK technical assistance.

International Technical Enquiries

Guidance on obtaining technical support in other countries.

The VIBE POWERBOX 400.1M is a British Audio power amplifier designed to enhance the audio system in a vehicle. This monoblock amplifier is part of the Powerbox Micro series, indicating a compact design suitable for various installations while delivering substantial power.

Function Description

The primary function of the POWERBOX 400.1M is to amplify audio signals from a source unit (headunit) and deliver them to speakers, specifically subwoofers, to produce powerful and clear bass. It is a Class D amplifier, known for its high efficiency and compact size, which minimizes heat generation and power consumption compared to other amplifier classes.

The amplifier features both high-level and low-level inputs, offering flexibility in connecting to different types of source units. High-level input allows connection directly to the speaker outputs of a headunit, which is particularly useful if the headunit lacks dedicated low-level (RCA) outputs. For source units with RCA outputs, low-level input provides a cleaner signal path.

A key feature of the POWERBOX 400.1M, especially when using high-level input, is its "Autosense" auto turn-on circuit. This circuit allows the amplifier to automatically switch on when it detects an audio signal from the connected source and turn off when the source is switched off. This eliminates the need for a separate remote turn-on wire, simplifying installation. However, for low-level (RCA) input, a remote turn-on wire from the headunit is still required. When using high-level input, the REM terminal on the amplifier can even output a +12V feed, which can be used to turn on other devices in the audio system that do not have an auto turn-on feature.

The amplifier includes several controls for fine-tuning the audio output. The gain control is used to match the input signal level from the source unit to the amplifier, ensuring optimal performance without distortion. A bass boost control allows users to add an adjustable amount of bass enhancement, centered at 45Hz, ranging from 0 to +12dB. Additionally, a Low Pass Filter (LPF) control is integrated, which is crucial for subwoofer applications. This control sets the crossover frequency, allowing only frequencies below the selected point (adjustable between 30Hz and 150Hz) to pass through to the subwoofer, preventing it from playing higher frequencies it's not designed for.

The POWERBOX 400.1M is equipped with power and protect LEDs. A green LED indicates normal operation, while a red LED illuminates if the amplifier enters protection mode, signaling a potential issue such as overheating, short circuit, or low voltage.

Usage Features

The POWERBOX 400.1M is designed for straightforward use and integration into a vehicle's audio system.

Installation Flexibility: The availability of both high-level and low-level inputs makes it compatible with a wide range of headunits, from factory-installed units without RCA outputs to aftermarket units with dedicated low-level outputs.
Auto Turn-On (High-Level Input): The Autosense feature simplifies wiring by eliminating the need for a remote turn-on wire when using high-level inputs. This is particularly convenient for installations where running an additional wire might be challenging.
Audio Customization: The gain, bass boost, and LPF controls allow users to tailor the amplifier's output to their specific preferences and the characteristics of their subwoofers and vehicle acoustics. Proper adjustment of these controls is essential for achieving optimal sound quality and protecting speakers.
Subwoofer Optimization: The adjustable Low Pass Filter is critical for integrating a subwoofer seamlessly into the overall audio system. By setting the crossover frequency correctly, the subwoofer will reproduce only the low-frequency sounds it is designed for, resulting in tighter, more impactful bass and improved clarity for other speakers.
Wiring Configurations: The manual provides clear diagrams for both single and dual subwoofer wiring configurations, ensuring users can correctly connect their subwoofers to achieve the desired impedance and power output. The amplifier supports a 1Ω minimum impedance, allowing for flexible subwoofer wiring options to maximize power delivery.
Diagnostic LEDs: The power and protect LEDs offer immediate visual feedback on the amplifier's operational status. A green light confirms proper functioning, while a red light alerts the user to a potential problem, prompting investigation to prevent damage.

Maintenance Features

Proper installation and adherence to the guidelines outlined in the manual are key to the long-term performance and reliability of the POWERBOX 400.1M.

Mounting Guidelines: The amplifier should be mounted in a dry location on a solid surface. Crucially, it should never be mounted upside down, as this can lead to overheating and eventual damage. Adequate airflow around the casing (at least two inches) is recommended for effective cooling, which is vital for the amplifier's longevity.
Power Cable Requirements: A minimum of 10 gauge cable is specified for the power connection, run directly from the battery. The use of rubber grommets when passing cables through bulkheads is emphasized to prevent chafing and cutting, which could lead to short circuits or power loss. A 40 amp fuse or circuit breaker must be installed inline with the power cable, no further than 18 inches from the battery, to protect the system from overcurrents. The fuse should only be fitted after the entire installation is complete.
Ground Cable Requirements: Similar to the power cable, a minimum of 10 gauge cable is required for the ground connection. It must be connected directly to the vehicle's chassis, to bare metal, and kept as short as possible to ensure an effective ground path. Connecting to seatbelt anchor points is not recommended.
RCA Cable Management: When using RCA cables, care should be taken to run them away from potential sources of interference, such as wiring harnesses. Running RCA cables on opposite sides of the car from power cables is recommended to minimize noise pickup and ensure a clean audio signal.
Gain Setting Procedure: The manual provides a detailed setup routine for correctly setting the gain control. This involves starting with minimum gain, ensuring bass boost on the headunit is at 0 dB, setting headunit crossovers to flat, and then slowly increasing the amplifier's gain until distortion is heard or an uncomfortable listening level is reached, then backing off slightly. This procedure helps prevent amplifier clipping and speaker damage.
Crossover Setting: For subwoofers, setting the crossover to low pass, with a frequency typically between 60-120 Hz, is crucial. This ensures the subwoofer only reproduces the frequencies it's designed for, extending its lifespan and improving overall sound quality.
Professional Advice: For optimal setup and performance, the manual recommends seeking advice from a professional installation engineer or visiting a local VIBE audio dealer.
Warranty Information: The product comes with a 12-month warranty, valid from the date of original receipt and proof of purchase. Users are advised to complete the online warranty card within seven days and retain the original receipt and packaging. The warranty covers manufacturing defects but explicitly excludes damage due to improper installation, moisture, excessive heat, chemical cleaners, UV radiation, negligence, misuse, accident, abuse, amplifier clipping, unauthorized repairs, or use of sealant. This highlights the importance of correct installation and careful handling to maintain warranty validity.

By following these guidelines, users can ensure the POWERBOX 400.1M operates efficiently, delivers high-quality audio, and has a long service life within their vehicle's audio system.