Detail 01
Tube preamp
Three 12AX7 tubes handle preamp duties, with one dedicated to the overdrive channel.
Product detailSKU #1500000316309
Gallien-KruegerFusion 800S 800W Ultra Bass Head
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Independent shopping perspective
The Korena take
Fusion 800S pairs an 800W Class-D bass head with a preamp using three 12AX7 tubes, including one assigned to its tube-driven overdrive channel. Its controls combine four-band tube EQ, overdrive shaping, and Bump, Contour, and Presence voicings. Illuminated, push-activated knobs make the controls easier to see onstage and access further tonal options. For recording or broader rig connections, it adds pre/post balanced DI, an effects loop, Aux and headphones, plus selectable loading for 2-, 2.7-, 4-, and 8-ohm cabinets.
Strong match
Who this is for
- Bass rigs requiring selectable loading across 2-, 2.7-, 4-, and 8-ohm cabinet configurations.
- Stage use where illuminated controls make tone adjustments easier to see.
- Recording setups using the balanced DI before or after the EQ section.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Direct output
The balanced DI can be set before or after EQ.
Detail 03
Connections
An effects loop, Aux connection, and headphone connection are built in.
Final check
Know before you order
- 01Confirm that your cabinet configuration corresponds to one of the selectable 2-, 2.7-, 4-, or 8-ohm loads.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does the Fusion 800S have a tube-driven overdrive channel?
Yes. One of its three 12AX7 preamp tubes is dedicated to the tube-driven overdrive channel.
02Can I use a headphone connection?
Yes. The head includes a headphone connection and an Aux connection.
03Can the DI be taken before or after EQ?
Yes. Its balanced DI offers both pre-EQ and post-EQ operation.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
6 detailsConnections & power
- Input Impedance
- 1 mohms
- Tuner Output Impedance
- 100 kohms
- Direct Output Impedance
- 1 kohms
- Return Input Impedance
- 10 kohms
- Send Output Impedance
- 750 ohms
- Maximum Input Level
- 0.6V RMS
