Down4sound D4S-XP28 DSP | 2-In/8-Out

The Down4Sound D4S XP28 DSP is built for full control of your car audio system. Designed for professional installers and competition-level sound systems, it delivers precise tuning and reliable performance without unnecessary complexity.

With 2 inputs and 8 outputs, the XP28 allows clean control over multi-amplifier and multi-speaker setups. Each channel can be adjusted independently for accurate tuning and repeatable results. No app required to use this piece.

Tuning and Signal Control

• 15 band graphic EQ on inputs
• Parametric EQ on inputs and outputs
• Butterworth and Linkwitz Riley crossovers up to 48 dB per octave

Time Alignment and Phase Control

• Phase inversion and phase alignment
• Full delay control for speaker placement correction

Limiter and System Protection

• Adjustable limiter with threshold
• Attack and release control for smooth output limiting

Built In Setup Tools

• Frequency generator
• Frequency sweep
• Pink noise

Profiles and Security

• Save and load custom tuning profiles
• Password protection to prevent unauthorized changes

Build Quality

• Tiffany style RCA connectors
• Durable D4S finished chassis
• Screen saver with rotating text

Key Specifications

• 2 RCA inputs
• 8 RCA outputs
• Independent gain and mute per output
• Master volume control

Dimensions

• 180 mm x 120 mm x 40 mm
• 7.08 in x 4.72 in x 1.57 in