Seymour Duncan STC-3PSB Fundamental 3-Band Tone Circuit For Passive Pi
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Seymour Duncan STC-3PSB Fundamental 3-Band Tone Circuit For Passive Pickups
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- SKU
- 11993-20
Description
Seymour Duncan STC-3PSB Fundamental 3-Band Tone Circuit For Passive Pickups
The STC-3PSB is a compact active preamp circuit that transforms passive pickup systems with responsive, articulate tone shaping. Its intuitive control layout and straightforward operation make it accessible for players upgrading their electronics without complexity or bulk.
Electronics & Tone Shaping
This 3-band active EQ preamp delivers high headroom and low-noise performance across a full range of frequencies. The circuit provides independent control over bass, treble, and midrange response, allowing you to dial in exactly the character your passive pickups need for the stage or studio, while the master volume and blend controls manage overall level and pickup balance.
Design & Power
The STC-3PSB runs on a single 9V battery, with the option to wire two batteries in series for added headroom in high-output applications. Black anodized knurled dome-style knobs provide tactile feedback and a professional appearance, while onboard trim pots allow preset frequency contour adjustments for fine-tuning the EQ curve to your rig's needs.
Key Features
- Designed for use with passive pickups
- 3-Band active onboard EQ preamp with high headroom, low-noise design
- Controls: bass, treble, midrange, master volume, and blend
- Frequency contour switch engaged by pulling up the volume control
- Two trim pots on circuit board for preset frequency contour EQ adjustment
- Single 9V battery power requirement
- Two 9V batteries can be wired in series for added headroom
- Black anodized, knurled, dome-style knobs
The STC-3PSB delivers the tone-shaping control a gigging musician needs in a compact form factor—transparent EQ that gets out of your way and lets you own your sound on any stage.
More Information
| Condition | New |
|---|---|
| Country of Manufacture | United States |
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At a Glance
The Seymour Duncan STC-3PSB is a compact active 3-band EQ preamp that breathes new life into passive pickup systems with surgical tone shaping and transparent, articulate response. Designed for intermediate to professional players upgrading their electronics, it delivers high headroom and low noise across bass, midrange, and treble controls—ideal for gigging musicians and studio players who want responsive, noise-free tone adjustment without the bulk or complexity of larger systems. Run it on a single 9V battery or two in series for maximum headroom in high-output rigs.
Who This Is For
Great for
- ✓ Studio Sessions
- ✓ Home Recording
- ✓ Gigging
- ✓ Live Performance
Skill level: Intermediate · Advanced · Professional
Frequently Asked Questions
Will the STC-3PSB work with any passive pickup guitar or bass?
Yes, the STC-3PSB is designed specifically for passive pickup systems and can be installed in any instrument using passive pickups. It works independently of pickup brand or output level.
How much battery life should I expect?
The circuit runs on a single 9V battery; actual life depends on usage and volume levels. For extended sessions or high-output applications, you can wire two 9V batteries in series for added headroom and extended runtime.
Can I adjust the EQ curve after installation?
Yes, onboard trim pots allow you to preset frequency contour adjustments for fine-tuning the EQ response. Additionally, a frequency contour switch (engaged by pulling up the volume control) provides quick tonal shaping during play.
How does the STC-3PSB compare to passive tone controls?
Active EQ circuits like the STC-3PSB provide independent control over bass, treble, and midrange with high headroom and low noise—delivering far more surgical and transparent shaping than passive circuits, which typically offer limited range and tonal coloration.
What controls does it have?
The circuit includes a 3-band EQ (bass, treble, midrange), master volume, blend control for pickup balance, and a frequency contour switch. All controls use black anodized knurled dome-style knobs for tactile feedback.
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