Audiobank AB2800.2 2-Channel Class A/B Car Amplifier

The Audiobank AB2800.2 is a two-channel Class A/B car audio amplifier for adding dedicated power to a vehicle speaker or subwoofer system. It is designed for systems that need more output and tuning flexibility than a head unit's built-in amplifier can provide. With line-level and speaker-level inputs, it can be paired with many aftermarket and factory-style audio sources.

This amplifier supports stereo speaker operation down to 2 ohms per channel, making it suitable for compatible low-impedance speaker setups. Audiobank lists maximum, rather than RMS, output figures of 2,500 watts per channel at 2 ohms and 1,250 watts per channel at 4 ohms, both at 1% THD. Careful speaker matching and correct gain adjustment are important when building a reliable system around these published maximum ratings.

Variable low-pass and high-pass crossover controls allow the AB2800.2 to serve different roles in an audio system. The low-pass filter can help direct bass frequencies to compatible subwoofers, while the high-pass filter can limit deep bass sent to compatible full-range speakers. This makes the amplifier useful in a bass-focused installation or a multi-amplifier speaker upgrade.

The AB2800.2 includes a remote subwoofer level control and bass knob for convenient adjustment from the listening position. Its 10 Hz to 30 kHz frequency response supports both low-frequency and full-range amplifier applications. An input sensitivity range of 200 mV to 6 V helps accommodate a range of source-unit signal levels.

Protection features include overload, thermal, and short-circuit protection, along with soft-start and muting functions. Power and protection indicators provide basic operating-status feedback. The amplifier is bridgeable, but a bridged power rating and minimum bridged speaker-load specification are not published in the available technical details.

Key Features

• Two-Channel Class A/B Design: Provides separate left and right channels for stereo speaker systems or compatible bridged applications.
• 2-Ohm Stereo Stability: Supports compatible speaker loads down to 2 ohms per channel in stereo operation.
• Variable Crossovers: Adjustable high-pass and low-pass filters help match the signal to connected speakers or subwoofers.
• Line And Speaker Inputs: Allows connection to compatible aftermarket receivers and many factory-style source systems.
• Remote Bass-Level Control: Includes a bass knob for accessible subwoofer-level adjustment from the cabin.
• Protection Circuitry: Helps safeguard the amplifier with overload, thermal, and short-circuit protection functions.

Design & Installation

The AB2800.2 uses chrome-plated RCA, power, and speaker terminals, with power and protection status indicators. Its published dimensions are 10.5 inches wide, 2.19 inches high, and 19.96 inches deep. The published technical details do not identify the amplifier chassis material.

Install the amplifier securely in a ventilated location with room for its nearly 20-inch depth, wiring connections, and control access. It is intended for negative-ground 12-volt vehicle electrical systems and lists one 80-amp fuse. Use appropriate power, ground, signal, remote-turn-on, and speaker wiring, then set the crossover and gain controls for the connected speakers or subwoofers.