Gallien-Krueger Fusion 1200S 1200-Watt Ultralight Bass Guitar Head Amplifier

Unleash Massive Bass Power - The Gallien-Krueger Fusion 1200S 1200-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.

SPECIFICATIONS

Power Output

• 1 Channel: 400W @ 1% THD+N, 8Ω
• 1 Channel: 800W @ 1% THD+N, 4Ω
• 2 Channels: 800W Total @ 1% THD+N, 8Ω Per Channel
• 2 Channels: 1100W Total @ 1% THD+N, 4Ω Per Channel
• 2 Channels: 950W Total @ 1% THD+N, 4Ω on One Channel and 8Ω on the Other Channel

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 800W/1100W
• 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: 6.5 lbs. (2.9 kg)

Power Requirements

• 120V / 60Hz (U.S./Canada): 1432W Full Power, 215W Average Power
• 230V / 50/60Hz (Europe): 1432W Full Power, 215W Average Power
• 100V / 50Hz (Japan): 1432W Full Power, 215W Average Power

We are Musictoner Musictoner

Since 1958, Chuck Levin’s Musictoner 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.