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Seymour Duncan STC-3A 3-Band Tone Circuit For Active Pickups vs Seymour Duncan STC-3M4 3-Band Tone Circuits for Music Man (4 Knobs)
The STC-3A is a prewired harness for active-pickup basses requiring a blend circuit and slap switch, while the STC-3M4 is a drop-in preamp for Music Man passive-pickup instruments with a push/pull master volume knob. Choose the STC-3A if you have active pickups and need blend control; choose the STC-3M4 if you own a Music Man bass and want to upgrade passive electronics.
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Seymour Duncan STC-3A 3-Band Tone Circuit For Active Pickups
Seymour Duncan STC-3M4 3-Band Tone Circuits for Music Man (4 Knobs)
Specs side by side
| Seymour Duncan STC-3A 3-Band Tone Circuit For Active Pickups | Seymour Duncan STC-3M4 3-Band Tone Circuits for Music Man (4 Knobs) | |
|---|---|---|
| Price | $165.00 | $165.00 |
| Brand | Seymour Duncan | Seymour Duncan |
| Pickup Type | Any Position | Any Position |
| Condition | New | New |
Why choose Seymour Duncan STC-3A 3-Band Tone Circuit For Active Pickups
- ✓ Includes blend circuit for managing interaction between two active pickups
- ✓ Proprietary slap switch adds versatility across multiple genres
- ✓ Two trim pots for fine-tuning frequency contour characteristics
Why choose Seymour Duncan STC-3M4 3-Band Tone Circuits for Music Man (4 Knobs)
- ✓ Direct drop-in replacement engineered specifically for Music Man four-knob cavities
- ✓ Push/pull master volume knob integration for convenient slap switch activation
- ✓ Preserves original instrument character while adding professional EQ control
Frequently asked questions
Which circuit is compatible with my bass?
The STC-3A requires a bass with active pickups and space for four control knobs. The STC-3M4 is engineered specifically for Music Man instruments with passive pickups and existing four-knob control cavities.
Do both circuits include a slap switch?
Yes, both include a proprietary slap switch. The STC-3A has a dedicated slap switch, while the STC-3M4 activates it via a push/pull master volume knob, offering more convenient footprint integration.
Can I use 18V operation on either circuit?
Yes, both circuits support single 9V battery operation with the option to wire two 9V batteries in series for increased headroom and dynamic range.
Which one gives me more control over tone?
Both offer three-band EQ with bass, treble, and midrange controls plus master volume. The STC-3A adds a dedicated blend circuit for active pickups, while the STC-3M4 includes trim pots for preset slap contour adjustment, making them comparable in surgical control depth.