Hertz S8 DSP Ultra-Compact 8-Channel Motorcycle Digital Signal Processor
$1,310.00 AUD
SKU: S8DSP
Skip to product information
| Configuration | 8 in / 8 out |
| Year Range | 1998-2013, 2014-2023, 2024+, Trike 2009-2013, Trike 2014-2025, Trike 2026+ |
Hertz S8 DSP – Precision 8-Channel Processing for High-Performance Harley Audio
The Hertz S8 DSP is a compact, high-resolution digital signal processor engineered for riders who want full control of their audio system. With 8 processed channels, 96 kHz / 24-bit capability, advanced crossovers, time alignment, and a tiny footprint that fits easily inside Harley fairings, the S8 DSP is the foundation of any properly tuned multi-amp motorcycle system.
Who This Is For
- Riders building a multi-amp or active system on a Harley-Davidson Touring bike who want full control of the tuning.
- Owners keeping a factory 2014+ Harley radio, since high-level inputs and summing allow integration with the standard head unit.
- Builds tight on space – the compact chassis mounts inside Street Glide and Road Glide fairings.
- Riders who want separate presets for solo, two-up or parked demo listening.
- Note there is no hardware remote in the box; volume, subwoofer level and presets are adjusted from the phone app.
Key Features
- 8 processed channels for full active front stages, mid-bass, and sub control.
- Hi-Res Audio support with 96 kHz / 24-bit converters for cleaner tuning precision.
- 15-band parametric EQ per output channel and 7-band paragraphic EQ per input channel, plus or minus 12 dB in 0.1 dB steps with adjustable Q and frequency.
- Time alignment from 0 to 13.5 ms (0 to 468.4 cm / 0 to 184.4 in) for accurate staging at the rider's position.
- Adjustable crossovers on all channels with Butterworth, Linkwitz-Riley and Bessel alignments, 6 dB/oct to 30 dB/oct in 6 dB steps.
- Analog Devices ADAU1451 DSP with 32-bit processing.
- Coaxial S/PDIF digital input up to 24-bit / 96 kHz.
- Bluetooth 5.0 for wireless tuning and control.
- Compact chassis (130 × 88 × 33 mm) fits inside Street Glide and Road Glide fairings.
- OEM-friendly integration with high-level inputs and summing capability.
- Windows, macOS and mobile tuning – full software for Windows 10/11 and macOS 10.13 or later, plus an iOS and Android Configurator app over Bluetooth 5.0.
Why It Works on Harleys
- Ultra-compact size allows fairing mounting even in multi-amp systems.
- High-level input compatibility integrates with factory 2014+ Harley radios.
- Multiple preset capability to tailor sound for solo, two-up, or demo (parked) modes.
- Fine-grained EQ and time alignment compensates for fairing location differences.
- DRC control from your phone – the iOS and Android app adjusts volume, subwoofer level and preset selection. Note there is no hardware remote supplied in the box.
- Essential for active systems running SP4.900, SP4.500, SP1.900, and multi-amp setups.
Recommended System Use
- Active front stages: midrange + tweeter crossover and alignment.
- Mid-bass and subwoofer control: dedicated low-frequency EQ and filtering.
- 4–8 channel amplifier systems: Street Glide, Road Glide, Ultra, CVO builds.
- High-end tuning: for maximising clarity and SPL at highway speeds.
Fitment
- Suitable for all Harley-Davidson® Touring models.
- Installs in fairings, inner fairing cavities, or custom amp racks.
- Compatible with both factory and aftermarket head units.
Specifications
| Processed Channels | 8 |
| Input Channels | 6 (High/Low Level) |
| DSP | Analog Devices ADAU1451, 32-bit processing |
| Sampling Rate | 96 kHz |
| Resolution | 24-bit |
| Digital Input | Coaxial S/PDIF, up to 24-bit / 96 kHz |
| EQ (Output) | 15-band parametric per channel, ±12 dB in 0.1 dB steps, adjustable Q and frequency |
| EQ (Input) | 7-band paragraphic per channel, ±12 dB in 0.1 dB steps, adjustable Q and frequency |
| Crossover Types | HPF / LPF / Band-Pass, Butterworth, Linkwitz-Riley and Bessel on all channels |
| Crossover Slopes | 6 dB/oct to 30 dB/oct in 6 dB steps |
| Time Alignment | 0–13.5 ms, 0–468.4 cm (0–184.4 in) per channel |
| Input Sensitivity (Low Level) | 0.8 – 6 V RMS |
| Input Sensitivity (High Level) | 2.5 – 21 V RMS |
| Max Output | 4 V @ 0.05% THD |
| THD+N | <0.005% @ 1 Vrms out, 1 kHz |
| Signal-to-Noise Ratio | 105 dBA (analogue in) / 112 dBA (digital in) |
| Bluetooth | Bluetooth 5.0 |
| Software | Windows 10/11, macOS 10.13 or later, plus iOS and Android Configurator app via Bluetooth |
| DRC Control | Via iOS/Android app – volume, subwoofer level, preset selection (no hardware remote supplied) |
| Supply Voltage | 7 – 20 VDC, 1 A |
| Dimensions | 130 × 88 × 33 mm |
| Weight | 0.66 kg |
| In the Box | Cables, 1 A fuse, screws, USB stick with software, manual |
Specifications per Hertz published technical documentation.
Need Help With DSP Setup?
The S8 DSP is a powerful tool for unlocking maximum clarity, staging, and output from your Harley audio system. If you're building a multi-amp or active setup, we can help design a complete signal path that gets the most from your speakers and amplifiers.
Related collections
This part is listed in: All 2014–2023 Touring Audio · Digital Signal Processors (DSP) · Hertz – DSP
Australia Shipping:
- Under $500 → $19.95
- $500–$2,500 → $14.95
- $2,500 and above → FREE
- Bulky items → +$25 surcharge (waived once your order reaches $2,500)
Fast dispatch from Brisbane. In-stock orders placed before 1pm AEST usually ship the same business day.
Change of mind: Request a return within 30 days of delivery. The product must be unused, unopened and in its original sealed packaging, valued at $50 or more, and you'll need an RMA number from us before sending anything. Return freight is yours, and a restocking fee of up to 15% may apply – we'll confirm any fee before the return is accepted.
Not returnable for change of mind: opened, installed or test-fitted items, special-order and custom products, custom harnesses, completed tuning, gift cards and items under $50.
Fitment: If we confirmed fitment in writing based on accurate bike details and it doesn't fit, we'll put it right and cover reasonable freight. Not sure? Ask us before you order – we're happy to help.
Faulty, damaged or wrong item: Contact us first with your order number. Faults follow our RMA and warranty process, and none of this affects your rights under the Australian Consumer Law.