The Source Audio SA 252 One Series Atlas Compressor is a compressor effects pedal with six compression types and switchable guitar and bass modes. It combines classic stompbox compression with circuits inspired by sought-after rack units, while also offering dual-band compression with independent control of the high and low frequencies.

Compression and features

• Two selectable optical compression types, one VCA type, one FET type and two dual-band types
• LA2A Optical Compression with warm, smooth compression
• 1176 Feedback FET Compression with full body and a super-fast attack
• LED Optical Compressor with a concept similar to the LA2A, but with a quicker, dirtier response
• Rackmount VCA-style compression with a fast response and hard knee
• Bass mode converts all factory presets for use with bass guitar, with adjusted dynamic range and attack characteristics
• Two selectable dual-compressor modes for Series, Parallel or Band Split operation
• Additional compressor types available through the Neuro Editor
• Auto Makeup Gain automatically increases or decreases makeup gain according to the amount of compression
• Look Ahead Compression introduces imperceptible latency into the signal and looks ahead to provide an extra-fast, smooth attack without additional distortion or artifacts
• Side Chain Compression uses the signal going to Input 2 to trigger compression on the signal going into Input 1
• Adjustable noise gate

Neuro Editor and connectivity

Connecting the Atlas Compressor to the Neuro Desktop Editor or Neuro Mobile App unlocks additional editing options, including a full studio compressor module with advanced parameters. The Neuro Editor includes a signal readout that displays the compressor’s gain reduction in real time. It also provides access to 3-band parametric or 8-band graphic EQs, additional compressor types, and tools for creating, saving and sharing presets.

• Full MIDI capabilities with the Source Audio Neuro Hub
• Mini USB port for PC connectivity, compatible with Windows and Mac
• 3.5 mm control input for controlling up to four parameters with an external expression pedal

Controls and construction

• Controls for Threshold, Ratio, Blend and Output
• ALT button activates secondary functions for the controls: Tone, Attack, Release and Output
• Preset toggle switch for six onboard presets
• Bypass footswitch and status LEDs
• Selectable universal bypass, analog buffered bypass or relay-based true bypass
• Brushed anodized aluminum housing

Connections and power

• Two 6.3 mm TS mono inputs
• Two 6.3 mm TS mono outputs
• Power via optional 9V DC adapter (SR SA 153), 2.1 x 5.5 mm barrel plug, center-negative polarity
• Current draw: 165 mA
• Battery operation is not supported
• Dimensions: 114 x 70 x 51 mm / 4.5" x 2.75" x 2"