SKU: 8542209501

Boss KTN500B HD Bass Amplifier Head

Sale price$495.00 Regular price$550.00
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Description

Boss KTN500B HD Bass Amplifier HeadExperience signature Katana sound in a compact yet powerful form factor with the Katana 500 from BOSS, a 500W bass amp head with loads of control. Sporting comprehensive 4 band EQ, onboard FX, compression, drive, cabinet emulation, and selectable preamp voicing, the Katana 500 is a veritable bass control hub. With classic BOSS effects onboard, tap tempo, and the Blend knob for dry wet balance, you can achieve studio quality signal processing

Experience signature Katana sound in a compact yet powerful form factor with the Katana 500 from BOSS, a 500W bass amp head with loads of control. Sporting comprehensive 4-band EQ, onboard FX, compression, drive, cabinet emulation, and selectable preamp voicing, the Katana 500 is a veritable bass control hub.

With classic BOSS effects onboard, tap tempo, and the Blend knob for dry/wet balance, you can achieve studio-quality signal processing internally. Two 4-ohm Neutrik speakON outputs are provided for either 4-ohm (500W) or 8-ohm (250W) operation with external cabinets. A direct XLR line output sports three cab emulations, selectable ground lift, selectable post, pre, or direct signals, and automatic cab resonance calibration. And when further tone sculpting is needed, you get a variable low-cut filter (up to 200 Hz), a fixed hi-cut filter, and a even a pad button to help tame the output power in quieter environments. The Katana 500 includes a power cord.

Refined Tone and Authoritative Power
The Katana 500 bass amp head brings you high-performance amplification fueled by decades of BOSS knowledge and expertise. Three unique preamp types are also available—each with a powerful Shape switch to fine-tune the character—so you'll always have the perfect sound for any style or genre.
  • Vintage: a classic tube voice with organic tone and natural drive
  • Flat: smooth, clear, and dynamic tone with rich harmonic character
  • Modern: quick dynamic response with extended bass range
Precision Soundcrafting Tools
With the intuitive panel controls on the Katana 500 bass amp head, you can quickly refine your tone in detail. The studio-inspired Blend section lets you mix in some dry signal, which you can preshape from the panel with three customizable settings for the optimum tonal fusion. A comprehensive four-band EQ is also on hand, complete with three selectable frequency centers in the low-mid and high-mid bands.

Versatile Performance Companion
The flexible Katana 500 Bass is your perfect partner for any live gig. Tone Setting memories are available for storing and recalling the sounds you create, including preamp type, EQ, Blend, and effect settings.


You can switch memories from the panel and go even further with optional footswitches, an expression pedal, and the GA-FC Foot Controller. There’s also a balanced XLR output with a switch to select between direct, pre, or post signals, plus two Neutrik 4-ohm speakON speaker jacks to augment your sound with an external cabinet if needed.

Recording and Practice Powerhouse
The Katana 500 bass amp head is equally suited for studio recording and home playing. The independent preamp gain, master volume, and drive controls let you find the perfect tone even at practice volumes. A stereo headphone/recording jack provides a direct output with effects and mic'd cab emulation with three Air Feel settings (plus a customizable setting), while USB lets you interface with computer production software and track with great tone, a perfect option for reamping.

Go Deeper with BOSS Tone Studio
To shape sounds with even finer control, reach deep into the heart of the Katana 500 Bass with the BOSS Tone Studio editor. Adjust preamp, EQ, and Blend settings, call up and tweak over 60 BOSS effects, and organize sounds in Live Sets for different gigs.


You can also shape the overall amp response with powerful global EQs and fine-tune system settings. And by connecting an optional BOSS Bluetooth Audio MIDI Dual Adapter to the rear panel, you can wirelessly adjust settings on the gig from your iOS or Android mobile device.

Specifications

Amplifier Type
Solid-State
Output Power
500 W Peak
Channels
1
Master Volume
Yes
Tone Section
Bass, Gain, Mid, Treble
EQ
4-Band Semi-Parametric
Effects Loop
No
Inputs
1x 1/4" Mono Instrument
2x 1/4" Footswitch
Outputs
2x speakON Mono Speaker
1x XLR Mono Line Level
1x 1/4" Stereo Headphone
Output Impedance
4/4 Ohms Mono
USB I/O
1x USB-B Female (Audio Streaming, Host Connection)
Wireless
Bluetooth
*Via Optional Adapter
Mobile App Compatible
Yes, Adapter Required (Not Included): Android & iOS
App Name: BOSS Tone Studio
Functionality: Adjust Settings, Firmware Update
Power
AC Input Power
Factory Set:
100 to 120 VAC, 50 / 60 Hz
Power Consumption
500 W
Physical
Dimensions (W x H x D)
11.7 x 8.3 x 3.8" / 29.8 x 21.2 x 9.6 cm Amplifier
Weight
6.2 lb / 2.8 kg (Amplifier)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 8542209501

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Adam
Los Angeles, US
★★★★★ 5
Fine product
Size: 150 ml, Pack of 1
This one works
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Reviewed in the United States on May 24, 2026
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Palmetto Dan
Lexington, US
★★★★★ 5
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Size: 150 ml, Pack of 1
This product works great for cleaning valves. Very effective formula that does the job well. Arrived quickly and was exactly as described. Would definitely buy again!
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Reviewed in the United States on May 2, 2026
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cb
San Leandro, US
★★★★★ 5
Molly valve cleaner
Size: 150 ml, Pack of 1
Put this in my truck with a RAM engine it was kind of running a little bit rough not really sure what was going on I thought I'd get this liquid Maui a try and she smoothed out some but you know who knows it could be all Hocus pocus
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Reviewed in the United States on May 23, 2026
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GEORGE A SNARSKI
Grantham, US
★★★★★ 5
great for any engin
Size: 12 fl. oz. (Pack of 1)
Have been looking for this for a long time.i always used when i had a ,chevy 327,300.3speed.the engin always run great and when we changed the value cover gaskests the inside look like brand new,and clean.
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Reviewed in the United States on May 31, 2026
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Citasio
Grantham, US
★★★★★ 5
Great product
Size: 12 fl. oz. (Pack of 1)
Noticeable difference in the first 50 miles .
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Reviewed in the United States on March 30, 2026

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