Kustom K150-6 2-Channel Bass Combo Amplifier - Used

-YOU ARE VIEWING PHOTOS OF THE ACTUAL BASS AMP BEING SOLD!

This used Kustom will ship insured and inspected from our Rapid City, SD location. This bass amp is in very good condition with multiple rips and scuffs in the Naugahyde vinyl. For condition, refer to photos.

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Bass players and vintage amp enthusiasts alike will appreciate the blend of retro aesthetics and modern speaker performance in this Kustom K150-6 2-Channel Bass Combo Amplifier, available now at Haggerty’s Music in Rapid City, SD. A product of Kustom’s legendary tuck-and-roll era, this early 1970s combo amp delivers around 75 watts RMS through a single upgraded Eminence Beta-15A speaker, offering modern efficiency and robust power handling. The Beta-15A brings a notable boost in clarity and low-end definition, with a frequency response of 46 Hz to 4.5 kHz and a sensitivity rating of 98 dB—ideal for bass applications. Housed in the iconic black padded vinyl cabinet with dual front bass ports, the amp is loaded with two independent channels, each offering high and low inputs, bright switches, and individual tone controls. The amp is mounted on casters for easy portability and has been fully tested for reliable performance. While cosmetic wear is present, its vintage character is intact, and the updated speaker ensures strong tonal performance on stage or in the studio.

Features / Specs

Power & Output

• Output Power: Approx. 75 watts RMS (150 watts peak)
• Speaker Configuration: 1x15” Eminence Beta-15A speaker

Speaker Specs – Eminence Beta-15A

• Power Handling: 400 watts RMS / 800 watts program
• Frequency Range: 46 Hz – 4.5 kHz
• Impedance: 8 ohms
• Sensitivity: 98 dB
• Magnet Type: Ferrite
• Basket Type: Stamped steel

Channels & Controls

• Channels: 2 independent channels
• Inputs: High and Low jacks per channel (4 total)
• Tone Control Per Channel:
• Volume
• Bright Switch (On/Off)
• Treble and Bass EQ

Construction

• Cabinet Style: Tuck-and-roll padded Naugahyde vinyl (Black)
• Cabinet Type: Ported, with two front-facing bass reflex ports
• Portability: Casters installed for easy transport
• Chassis Access: Rear removable panel with fuse and monitor output

Miscellaneous

• Condition: Used – Good; moderate cosmetic wear from age
• Tested & Inspected: Fully functional and professionally evaluated
• Origin: Made in Chanute, Kansas, USA
• Model: K150-6
• Serial No.: 61789