Blue Note Music
1970 Kustom 100 Blue
1970 Kustom 100 Blue
Blue Note Music
Amplifier Authentication & Evaluation Checklist
BASIC INFORMATION
Manufacturer: Kustom
Model: K 100 2
Serial Number: 57679
Circuit Designation: KEI-1-PC-104
Estimated Production Year: 1970
Country of Manufacture: USA
PRIMARY AUTHENTICATION
Serial Number Verification: Correct
Chassis Inspection: Original
Circuit Verification: Factory documentation
Circuit Identified As:
Date Code Verification:KE-1-P104
Transformer Codes: 049-7002-01
Potentiometer Codes: not visable
Speaker Codes: 22011
CABINET AUTHENTICATION
Cabinet Construction : Plywood
Covering: Original Tuck and Roll
Grill Cloth: Original
Hardware
Handle: Original
Corners: Original
Feet: Original
Logo: Original
TRANSFORMERS
Power Transformer
Manufacturer: Unknown
Date Code: 7002 2nd week of 1970
Transformer Assessment: Original & Good working order
SPEAKER SYSTEM
Speaker Configuration: 2x12
Speaker Manufacturer: Jensen 22011. Most likely made around 2000
Speaker Assessment: Good condition. No tears or blown voice coils
ELECTRONICS AUTHENTICATION
Capacitors
Filter Capacitors: Original
Coupling Capacitors: Original
Wiring Harness: Original
Solder Joints: Original
MODIFICATIONS
Functional Modifications: Speakers replaced
STRUCTURAL CONDITION
Cabinet: minor wear
Chassis: Minor corrosion
FINAL EVALUATION
Condition Grade: C
A+ — Exceptional / Collector Grade
Outstanding originality and condition. Among the finest examples likely to be encountered.
A — Excellent
Highly desirable example with only minor wear and no significant issues.
B — Very Good
Strong vintage example with normal wear and minor repairs or service replacements.
C — Good Player Grade
Functional amplifier with noticeable modifications, repairs, or originality loss.
D — Project Grade
Requires significant repair, restoration, or maintenance.
F — Parts / Salvage Grade
Major damage or missing components make restoration impractical.
Originality Grade: O3 moderately modified
Structural Grade: S1 Excellent
Repair Grade:R0 - no work recommended
BLUE NOTE AUTHENTICATION SUMMARY
Authentication Confidence: High
FINAL NARRATIVE SUMMARY
Here's a sales-focused summary that is accurate, highlights the amplifier's strengths, and honestly addresses the speaker replacement without detracting from its appeal.
This 1970 Kustom K100-2 is an authentic, USA-built vintage solid-state amplifier that retains its iconic original Tuck & Roll cabinet, factory KEI-1-PC-104 circuit, original transformers, and original electronics, making it an excellent example of one of Kustom's most recognizable designs. Professionally evaluated by Blue Note Music with a high authentication confidence, this amplifier remains structurally excellent and requires no repairs, offering dependable performance for both players and collectors. The Jensen speakers are replacements that are in excellent working condition, delivering strong, reliable tone while preserving the amp's road-ready functionality. With only minor cosmetic wear consistent with age, this K100-2 is a great opportunity to own a genuine piece of American amplifier history that is equally at home on stage, in the studio, or in a vintage collection.
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