The Down4Sound D4S-XP28 DSP is engineered for those who want total control over their system. Designed with installers and competitors in mind, the XP28 gives you 2 inputs and 8 outputs, paired with precision tuning tools that go far beyond basic processors.

With a graphic and parametric EQ, limiter with threshold/attack/release, high-precision Butterworth & Linkwitz-Riley crossovers, and full delay/phase control, this DSP is built for competition-level accuracy. It even includes test tools like a frequency generator, sweep, and pink noise for professional system setup.

Key Features:

• 2 RCA inputs / 8 RCA outputs
• Graphic input EQ (15 bands) + parametric EQ (per input & per output)
• High precision crossover: Butterworth & Linkwitz-Riley (up to 48 dB/octave)
• Phase inversion, alignment, delay control
• Limiter with threshold, attack, release adjustment
• Independent gain & mute per output + master volume
• Save & load custom tuning profiles
• Security password to block unauthorized changes
• Frequency generator, sweep, and pink noise for setup
• Screen saver with rotating text
• Bluetooth connectivity for tuning
• Tiffany RCA connectors, D4S case finish
• Dimensions: (est.) ~180 × 120 × 40 mm (7.08" × 4.72" × 1.57")