Hogtunes QC ULTRA 6-RM – QC 475-RM + REV 225-RM Dual Amp 6-Speaker G4 Ultra Kit (2014–2023)
Hogtunes QC ULTRA 6-RM — Dual Amp 6-Speaker G4 Kit for Ultra Models (2014–2023)
The Hogtunes QC ULTRA 6-RM is a true high-power, dual-amplifier six-speaker audio upgrade built specifically for 2014–2023 Harley-Davidson Ultra Limited, Ultra Classic and Tri Glide Ultra models. With a QC 475-RM 4-channel amplifier, a REV 225-RM 2-channel amplifier and three pairs of G4 6.5" speakers (front, rear and lowers), this kit delivers the strongest full-stage output available from Hogtunes for Ultra models.
Designed for balanced, full-range touring sound, this system provides powerful midbass, smooth vocals and clear highs across all six speaker positions. Everything installs cleanly using the included Ultra-specific plug-and-play harness.
Key Features
- Dual-amplifier system — QC 475-RM (4-channel) + REV 225-RM (2-channel).
- Three pairs of G4 6.5" speakers: front fairing, rear pods and lower fairings.
- True six-speaker output for complete touring coverage.
- Matched system design ensures balanced front, rear and lower frequency response.
- Plug-and-play Ultra harness — no cutting or splicing required.
- Motorcycle-tuned components designed to maintain clarity at highway speeds.
- Compatible with factory Harley radios or aftermarket head units.
- OEM-style appearance with a huge performance upgrade.
Why Riders Choose This Kit
- Proper power for all six speakers thanks to dual amps.
- Full-range front + rear + lower staging creates a true touring sound field.
- Ideal for Ultra riders who want the strongest Hogtunes 6-speaker configuration.
- Balanced sound with improved midbass, vocal clarity and output.
What’s Included
- 1 × QC 475-RM 4-Channel Class D Amplifier
- 1 × REV 225-RM 2-Channel Class D Amplifier
- 1 Pair G4 462F-RM 6.5" Front Speakers
- 1 Pair G4 462R-RM 6.5" Rear Pod Speakers
- 1 Pair G4 LC-6.5 Lower Fairing 6.5" Speakers
- Ultra-specific 6-speaker plug-and-play harness
- Amp mounting hardware
- All required installation hardware
- Installation Manual
Fitment
- 2014–2023 Ultra Limited – FLHTK
- 2014–2023 Ultra Classic – FLHTC
- 2014–2023 Tri Glide Ultra – FLHTCUTG
Technical Notes
- No radio re-flash required for the system to operate correctly.
- Class D amplifiers may reduce FM reception (normal across all brands).
- Best FM performance is achieved using the factory external antenna.
Specifications
| Amplifiers | QC 475-RM (4-Channel) + REV 225-RM (2-Channel) |
| Front Speakers | G4 462F-RM — 6.5" |
| Rear Speakers | G4 462R-RM — 6.5" |
| Lower Speakers | G4 LC-6.5 — 6.5" |
| Wiring | Ultra-specific 6-speaker plug-and-play harness |
Recommended Use
- Ideal for Ultra riders wanting a complete high-power 6-speaker touring system.
- Balanced output across all surround positions.
- The biggest G4-series upgrade Hogtunes offers for Ultra models.
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.