Unleash Massive Bass Power - The Gallien-Krueger Fusion 500S 500-Watt Ultralight Bass Guitar Head Amplifier
The Fusion S Series Heads are GK’s brand new Class D Model heads with a tube preamp. The rich warmth of tubes combined with the quick, punchy power section that GK bass amps are known for is an experience like no other. These high powered heads incorporate three 12ax7 tubes in the preamp, including one dedicated to the overdrive channel, making it GK’s first ever tube driven overdrive channel. Illuminated knobs add an extra level of sophistication and design by not only making it easier to dial in your tone on stage and but adding a beautiful stage presence as well. Each illuminated knob is also push activated, with additional voicing filters and tonal characteristics built in.
Like the Legacy Series, the Fusion S series uses a unique interconnection system that eliminates problems that can develop over time from constant vibration and temperature extremes that gear is subjected to with heavy use. Using circuit boards with gold plated connectors, rather than cables with standard tin connectors, this type of construction delivers a more pure, reliable sound. Features include GK's classic 4 band EQ, tube Overdrive complete with tone shaping, additional push button voicing filters such as "Bump", "Contour", and "Presence", Balanced DI with Pre and Post EQ, an Effects Loop, Aux and Headphone connections, and Load capacity selection, to deliver optimum power into 2, 2.7, 4 and 8ohm cabinet configurations.
Power Output
- 180W @ 1% THD+N, 8Ω
- 300W @ 1% THD+N, 4Ω
- 450W @ 1% THD+N, 2.7Ω
- 300W @ 1% THD+N, 2Ω
Input / Output
- Maximum Input Level: 0.6V RMS
- Input Impedance: 1MΩ
- Send Output Impedance: 750Ω
- Return Input Impedance: 10KΩ
- Tuner Output Impedance: 100KΩ
- Direct Output Impedance: 1KΩ
Equalizer
- Bass: ±10dB @ 60Hz
- Low Mid: +6dB / -10dB @ 250Hz
- High Mid: +6dB / -10dB @ 1kHz
- Treble: ±14dB @ 7kHz
- Contour Filter: +2dB @ 50Hz / -10dB @ 500Hz / +3dB @ 7kHz
Performance
- Noise: -90dB (A-weighted), Reference to 300W/450W
- Amplifier Protection: Full Short Circuit, Thermal and RF Protection
- Stable Into Reactive and Mismatched Loads
- 15-Second Muted Warm-Up
- Cooling: Two 40 x 40 x 20mm Variable-Speed Fans (12VDC, 1.6W Each, 8500 RPM, 10.91 CFM Per Fan)
Dimensions & Weight
- Dimensions (H x W x D): 2.4" x 11.5" x 10.7" (61 x 291.3 x 271mm)
- Weight: 5 lbs. (2.3 kg)
Power Requirements
- 120V / 60Hz (U.S./Canada): 552W Full Power, 96.4W Average Power
- 230V / 50/60Hz (Europe): 552W Full Power, 96.4W Average Power
- 100V / 50Hz (Japan): 552W Full Power, 96.4W Average Power
Manufacturer: Gallien-Krueger
Model: FUSION 500S
SKU: I587855-N-1-WHXC
UPC: 836989003257
We are Chuck Levin's Washington Music Center
Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.
Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.
Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.
| Condition | Brand New (New) Brand New items are sold by an authorized dealer or original builder and include all original packaging.Learn more |
|---|---|
| Brand | |
| Model |
|
| Categories | |
| Number of Inputs |
|
| Power Tube Type |
|
| Electronics |
|
| Reverb |
|
| Color Family |
|
| Number of Channels |
|
| Impedance |
|
| Output Power (Watts) |
|
Product safety information may be available here.















