Crunch SA-1100.1 Smash Series Monoblock Class AB Amplifier

The Crunch SA-1100.1 is a Smash Series monoblock car audio amplifier designed to add dedicated low-frequency amplification to a vehicle sound system. Its single-channel configuration is intended for subwoofer duty rather than full-range multi-speaker amplification. It provides rated output of 195 watts RMS x 1 at 2 ohms or 120 watts RMS x 1 at 4 ohms.

This amplifier suits listeners building a straightforward bass upgrade with one subwoofer or a properly wired subwoofer group. It operates in mono only and is rated stable down to a 2-ohm load. High-level inputs also allow it to work with many factory or aftermarket radios that do not provide RCA preamp outputs.

The SA-1100.1 uses a Class A/B circuit topology with Crunch SPEED-FET MOSFET output components and a pulse-width-modulated power supply. Its low-noise preamplifier circuit is designed to accept the source signal before amplification. A variable input sensitivity range of 0.2 to 9 volts helps match the amplifier to different source-unit output levels.

System tuning tools include a variable electronic crossover with a 12 dB-per-octave slope, a 40 to 300 Hz low-pass filter, and a 10 to 40 Hz subsonic filter. Switchable bass boost offers 0, +6, or +12 dB settings, while selectable phase adjustment provides 0 or 180 degrees. A wired bass remote is included for adjusting bass level from the cabin.

For an upgrade path, the SA-1100.1 can be used as the dedicated bass amplifier alongside a separate amplifier for door speakers. Its 10 to 500 Hz frequency response and low-pass filtering support integration with higher-frequency speakers. RCA and speaker-level input options provide flexibility when planning either an aftermarket-radio or factory-radio installation.

Key Features

• Mono Subwoofer Output: Single-channel design focuses amplification on a bass speaker system.
• 2-Ohm RMS Rating: Delivers 195 watts RMS x 1 at 2 ohms.
• Variable Low-Pass Filter: Adjusts the upper bass cutoff from 40 to 300 Hz.
• Subsonic Filter: Adjustable 10 to 40 Hz filtering helps manage very low frequencies.
• Dual Input Options: RCA and high-level inputs support varied source units.
• Wired Bass Remote: Lets you adjust bass level from the listening position.

Design & Installation

The SA-1100.1 has a QTD aluminum heat sink intended to disperse heat, along with nickel-plated brass connection terminals. Screw-down connectors provide tool-accessible cable attachment points. LED diagnostic circuitry monitors overload and speaker-short protection conditions.

Mount the amplifier securely in a dry, ventilated location and avoid mounting it upside down. The 12-volt and ground terminals accept up to 4 AWG cable, while the speaker terminals accept up to 12 AWG wire. Use either RCA or supplied-harness high-level signal wiring, match the connected subwoofer load to the amplifier's 2- or 4-ohm ratings, and set gain and filters during final system tuning.