SoundQubed BG4-700 700 Watt Bagger Series Amp (Ultra Compact)

SoundQubed BG4-700 — 4-Channel Bagger Amplifier | BG-Series | 100W x 4 @ 4Ω

The SoundQubed BG4-700 is the entry model of the 2024 BG-Series — SoundQubed’s purpose-built line of ultra-compact amplifiers designed specifically for motorcycles, baggers, side-by-sides, boats, golf carts, and any application where space is the primary constraint. Measuring just 8.3" x 3.8" x 1.7", the BG4-700 delivers 100W x 4 at 4Ω, 175W x 4 at 2Ω, and 300W x 2 bridged at 4Ω in one of the smallest 4-channel amplifier chassis available. After 12 months of development and testing, SoundQubed engineered the BG-Series to change the direction of the bagger audio industry — and the BG4-700 is proof that serious sound doesn’t require serious space.

The BG4-700 features a selectable LPF/HPF/FULL crossover with a filter range of 35 Hz–250 Hz and a 10x crossover frequency multiplier for precise frequency control without a separate DSP. It accepts both low-level RCA input (400mV–6V) and automatic high-level input (RCA Auto) — making it plug-and-play compatible with factory head units and OEM audio systems. With a signal-to-noise ratio of 95 dB, 81% efficiency at 4 ohm, a damping factor of 92, and 52.6 dB channel separation, the BG4-700 delivers clean, accurate sound reproduction in a chassis built for the real world. The PCB features anti-corrosion protection coating for durability in outdoor and marine environments.

Powered by a 4GA input with a 3 x 40A fuse configuration, the BG4-700 is protected by a full suite of thermal, overload, DC output, short circuit, and voltage input protection circuits. The sleek black case with machined logos and lasered end caps maintains SoundQubed’s premium aesthetic — even in the tightest install locations.

Why Choose the SoundQubed BG4-700?

• 100W x 4 @ 4Ω / 175W x 4 @ 2Ω / 300W x 2 Bridged @ 4Ω — Serious 4-channel output in an ultra-compact chassis built for baggers and space-constrained installs.
• Ultra-Compact 8.3" x 3.8" x 1.7" Chassis — Specifically designed for motorcycle fairings, saddlebags, and tight custom install locations.
• Automatic High-Level Input (RCA Auto) — Plug-and-play compatible with factory head units and OEM audio systems — no aftermarket head unit required.
• Selectable LPF/HPF/FULL + 10x X-Over Multiplier — Precise crossover control from 35 Hz to 250 Hz (x10 = up to 2,500 Hz) without a separate DSP.
• 95 dB Signal-to-Noise Ratio — Clean, accurate signal reproduction even in electrically noisy motorcycle environments.
• Anti-Corrosion PCB Coating — Built for outdoor, marine, and motorcycle environments where moisture and vibration are a constant reality.
• 3 x 40A Fuse Configuration — Properly fused for the current demands of a 700W 4-channel amplifier in a compact package.
• Audio Precision Quality Control Verification — Every BG4-700 is verified with Audio Precision instruments before leaving the factory.

Installation Recommendations

Motorcycle / Bagger Install: The BG4-700 is purpose-built for Harley-Davidson baggers and touring bikes. Its 8.3" x 3.8" x 1.7" footprint fits in most fairing pockets, saddlebag lids, and under-seat locations. Use the automatic high-level input to connect directly to your factory radio without an aftermarket head unit. Run channels 1/2 for front fairing speakers (HPF filtered at 80–100 Hz) and channels 3/4 for rear speakers or bridge for a compact subwoofer.

Marine / Side-by-Side / Golf Cart: The anti-corrosion PCB coating makes the BG4-700 an excellent choice for marine and outdoor installs. The compact chassis fits in virtually any storage compartment or under-dash location. Use the automatic high-level input for OEM head unit compatibility and the LPF/HPF crossover to tune your system without additional signal processors.

Electrical Requirements: The BG4-700 uses a 4GA power input with a 3 x 40A fuse. It is compatible with 12V electrical systems standard on motorcycles, boats, and powersports vehicles.

Full Specifications

Frequently Asked Questions

Q: Will the BG4-700 work with my factory Harley-Davidson radio?
A: Yes — the BG4-700 features automatic high-level input (RCA Auto) that connects directly to your factory radio’s speaker outputs without an aftermarket head unit. It automatically detects the signal and converts it for amplifier use.

Q: Where does the BG4-700 fit on a Harley-Davidson bagger?
A: At 8.3" x 3.8" x 1.7", the BG4-700 fits in most fairing pockets, saddlebag lids, tour-pak lids, and under-seat locations on Harley-Davidson touring and bagger models. Always measure your available space before purchasing.

Q: What’s the minimum impedance for bridged mode?
A: The BG4-700 is stable at 4Ω in bridged mode and 2Ω in stereo mode. Do not bridge into a load below 4Ω.

Q: Is the BG4-700 weatherproof?
A: The BG4-700 features an anti-corrosion PCB coating for durability in outdoor, marine, and motorcycle environments. It is not fully waterproof — protect it from direct water exposure and install in a location with reasonable weather protection.