Hertz SPL Show S8 DSP 8-Channel DSP Processor, 13 Inputs / 8 Outputs

Hertz S8 DSP is an 8-channel digital interface processor from the SPL Show line, built to integrate DSP control into OEM or aftermarket systems using speaker-level, RCA, and optical digital sources. It provides a full routing matrix and per-channel processing so you can build an active front stage, rear fill, and sub channels with proper crossover, EQ, and delay control.

With 13 total inputs (including 6 speaker-level, 6 pre-in/RCA, and 1 optical S/PDIF) and 8 processed RCA outputs (up to 4V), the S8 DSP is designed for OEM integration, multi-amp builds, and DSP-based system tuning without replacing the factory source.

Key Performance Features

• 13-input / 8-output DSP architecture with full input/output routing matrix
• Optical S/PDIF input supporting up to 96 kHz / 24-bit (with selectable extra gain)
• Per-output parametric EQ: 15-band, ±12 dB, 20 Hz–20 kHz
• Per-input parametric EQ: 7-band, ±12 dB, 20 Hz–20 kHz
• Active crossovers with multiple filter types and selectable slopes
• Time alignment per channel for staging and imaging control
• 4 onboard presets selectable via software or wiring
• Bluetooth 5.0 BLE connectivity for data/control (no audio streaming)

Input / Output & Tuning

• Inputs: 6-channel high-level (Speaker IN), 6-channel low-level (Pre IN), 1x Optical S/PDIF (up to 96kHz/24-bit)
• Outputs: 8-channel RCA pre-out, max 4V
• Input sensitivity: Pre-In 0.8–6 Vrms; Speaker-In 2.5–21 Vrms
• Input impedance: 10 kΩ (Pre IN/AUX); 4.7 Ω (Speaker IN)
• Crossover filters: Full / High-Pass / Low-Pass / Band-Pass
• Filter families & slopes: Butterworth (6/12/18/24/30 dB), Bessel (6/12/18/24/30 dB), Linkwitz (12/24 dB)
• Crossover frequency steps: 20 Hz–20 kHz (120 steps)
• Phase control: 0° / 180°
• Time alignment: distance 0–471.5 cm (0–185.5 in.); delay 0–13.58 ms; step 0.02 ms (0.7 cm / 0.27 in.)

Installation Use Cases

• OEM head unit integration (speaker-level input) with aftermarket amplification
• 8-channel DSP control for active front stage + rear + sub channel routing
• Systems requiring optical digital input and DSP-based tuning
• Competition/SPL builds needing routing flexibility, presets, and repeatable tuning control

Technical Specifications

• Brand: Hertz
• Series: SPL Show
• Model: S8 DSP
• Type: Digital interface processor (DSP)
• Inputs: 13 total (6 Speaker IN, 6 Pre IN, 1 Optical S/PDIF)
• Outputs: 8-channel RCA pre-out
• Max output level: 4 V
• THD (1 kHz, 1 Vrms out): 0.004%
• Bandwidth (-3 dB): 10 Hz–40 kHz
• Signal-to-noise (A-weighted, 4V out): 100 dBA (Master input), 112 dBA (Digital IN)
• Channel separation (1 kHz): 97 dBA
• Power supply: nominal 7–20 VDC (1A fuse); pulse operating 5–24 VDC
• Idling current: 0.34 A
• Remote IN: 6–20 VDC (10 mA)
• Remote OUT: 4–20 VDC (150 mA)
• PC / device connection: micro USB; Bluetooth 5.0 BLE (data only)
• Software compatibility: Windows 8 (USB only); Windows 10 (USB + BT BLE); macOS 10.13+; Android 7+; iOS 12+
• Operating temperature: 0°C to 55°C (32°F to 131°F)
• Size (W x H x D): 130 x 37 x 88.3 mm (5.12 x 1.45 x 3.48 in.)
• Weight: 0.66 kg (1.45 lb)

What’s Included

• (1) Hertz S8 DSP processor
• Multipolar cable: Pre-IN / Digital-IN
• Multipolar cable: Speaker IN
• Multipolar cable: PWR / REM
• Multipolar cable: Output
• USB cable (1.8 m)
• 1A fuse
• Mounting screws (4)
• USB memory dongle (software, user manual PDF, audio test tracks)
• Quick start guide and warranty

Why Buy From MCOR Automotive

• Authorized Hertz retailer
• OEM integration + DSP system design support
• Experienced tuning guidance for multi-channel builds
• Fast fulfillment with knowledgeable product support

Fitment, Installation & Warranty Notes

• Fitment Help: Need help confirming fitment, compatibility, amplifier matching, or installation parts? Use our Fit Guide or contact us through the chat button before ordering.
• Authorized Retailer: MCOR Automotive is an authorized Hertz retailer. Products purchased from MCOR include applicable manufacturer warranty coverage when installed and used according to manufacturer guidelines.