Hogtunes QC 475-RM — QuadCast 4-Channel Class D Amplifier with R.E.M.I.T.
The Hogtunes QC 475-RM QuadCast is a compact, motorcycle-specific 4-channel Class D amplifier engineered to power front, rear or lower speakers on Harley-Davidson Touring models. With high efficiency, strong output and Hogtunes’ proprietary R.E.M.I.T. (Reduced Electro Magnetic Interference Technology), this amplifier delivers clean performance with improved FM reception compared to typical Class D designs.
Designed to work flawlessly with factory charging systems and Harley radios, the QC 475-RM is a strong, reliable foundation for any multi-speaker upgrade.
Key Features
- 4-channel Class D amplifier optimised for Harley-Davidson motorcycles.
- R.E.M.I.T. circuitry helps maintain FM reception while running Class D power.
- High-efficiency design works with the small factory charging system.
- Compact chassis fits easily inside Rushmore fairings.
- Plug-and-play compatible when used with Hogtunes wiring harnesses.
- Ideal power source for front, rear or lower fairing speakers.
- No complicated tuning — amp is motorcycle-tuned straight out of the box.
- Compatible with factory Harley radios and aftermarket head units.
Why Riders Choose the QC 475-RM
- Stronger output than the OE Harley amplifier.
- Low-draw, high-efficiency Class D architecture.
- Improved FM performance thanks to R.E.M.I.T.
- Reliable multi-speaker power without stressing the electrical system.
What’s Included
- 1 × QC 475-RM QuadCast 4-Channel Amplifier
- Amp mounting hardware
- Installation Manual
Amplifier Uses
- Powering front + rear speakers in a 4-speaker setup.
- Powering front + lower speakers in bikes with fairing lowers.
- Powering 6-speaker systems when paired with a second Hogtunes amp (e.g. REV 225-RM).
Specifications
| Channels | 4-Channel Class D |
| Technology | R.E.M.I.T. (Reduced Electro Magnetic Interference Technology) |
| Design | Motorcycle-specific, high-efficiency |
| Fitment | Harley-Davidson Touring fairings (Fairing mounting hardware required) |
Recommended Use
- Perfect amplifier for 4-speaker Touring upgrades.
- Ideal for adding lower fairing speakers to Ultra models.
- Works seamlessly as the main amp in a dual-amp 6-speaker system.
Shipping
Australia Shipping:
- Under $500 → $19.95
- $500–$2,500 → $14.95
- Over $2,500 → FREE
- Bulky items → +$24.95 surcharge (waived over $2,500)
Fast dispatch from Brisbane. Same-day shipping on in-stock orders before 1pm AEST.
Return policy
Change-of-mind returns: We accept returns within 7 days of delivery on unused, unopened products in original sealed packaging. Restocking fees apply (20–30%). Return shipping is the customer’s responsibility.
No returns on opened audio gear, installed items, custom orders, or special-order products. Please check fitment carefully before installing.
Faulty or incorrect items: If you experience an issue, contact us with photos/video and your order number. We’ll assess the claim and arrange repair, replacement, or refund for verified faults under the Australian Consumer Law.
Fitment assistance: If you’re unsure about compatibility, reach out before ordering—we’re happy to help.