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Seymour Duncan AJB-3ASB Steve Bailey Fundamental Fretless System 3-Band Tone Circuit vs Seymour Duncan ASB-3ASB Steve Bailey 6-String Fretless System 3-Band Tone Circuit

The AJB-3ASB is designed for 4 and 5-string fretless basses with J-style pickups, while the ASB-3ASB is purpose-built for 6-string fretless basses with soapbar pickups. Choose the AJB-3ASB if you play a standard 4 or 5-string; choose the ASB-3ASB if you need the extended range and tonal character of a 6-string fretless.

No sales tax on orders shipped outside California — total cost beats national retailers that charge sales tax in nearly every state.

Seymour Duncan AJB-3ASB Steve Bailey Fundamental Fretless System 3-Band Tone Circuit

$359.00
View Seymour Duncan AJB-3ASB Steve Bailey Fundamental Fretless System 3-Band Tone Circuit

Seymour Duncan ASB-3ASB Steve Bailey 6-String Fretless System 3-Band Tone Circuit

$369.00
View Seymour Duncan ASB-3ASB Steve Bailey 6-String Fretless System 3-Band Tone Circuit

Specs side by side

Seymour Duncan AJB-3ASB Steve Bailey Fundamental Fretless System 3-Band Tone CircuitSeymour Duncan ASB-3ASB Steve Bailey 6-String Fretless System 3-Band Tone Circuit
Price$359.00$369.00
BrandSeymour DuncanSeymour Duncan
Pickup TypeAny PositionAny Position
ConditionNewNew

Why choose Seymour Duncan AJB-3ASB Steve Bailey Fundamental Fretless System 3-Band Tone Circuit

  • Calibrated neck and bridge J Bass pickups designed for articulate fretless tone
  • Works with both 4 and 5-string configurations
  • Frequency contour switch accessible via volume knob pull
  • Hand-built in Santa Barbara with high quality control

Why choose Seymour Duncan ASB-3ASB Steve Bailey 6-String Fretless System 3-Band Tone Circuit

  • Purpose-built for 6-string fretless bass extended range
  • Responsive soapbar pickups tuned for punchy fretless character
  • Pre-assembled harness with high-quality potentiometers reduces installation complexity
  • Includes professional black anodized dome-style knobs
Bottom line: Pick the AJB-3ASB if you play a 4 or 5-string fretless with J-style pickup cavities. Pick the ASB-3ASB if you own a 6-string fretless bass or need soapbar pickup compatibility.

Frequently asked questions

Which system fits my bass?

The AJB-3ASB accommodates 4 and 5-string basses. The ASB-3ASB is engineered for 6-string fretless basses. Both systems require space for four control knobs and a 9V battery cavity.

What is the main pickup difference?

The AJB-3ASB uses calibrated active J Bass pickups (neck and bridge). The ASB-3ASB uses responsive soapbar pickups. J-style pickups typically offer more articulation in tight spacing; soapbars provide broader tonal palette and wider string coverage.

Are the tone circuits the same?

Both feature 3-band active EQ with master volume, blend, midrange control, and concentric bass/treble controls. Both include a frequency contour switch activated by pulling the volume knob. Both run on a single 9V battery (approximately 1,000 hours) with optional dual-battery configuration for added headroom.

How difficult is installation?

The AJB-3ASB includes a detailed wiring schematic and mounting hardware. The ASB-3ASB includes a pre-assembled harness and mounting hardware, potentially simplifying installation further. Both are hand-built in Santa Barbara with quality construction standards.

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