EMG Stacked Bass/Treble with Stacked Mid-Range Control (2 potentiomete
Share
- Brand new in original box
- Full EMG manufacturer's warranty
- Free shipping in the continental US
In stock
- SKU
- EMG874
Description
EMG BQC Stacked Bass/Treble with Mid-Range Control
The EMG BQC is a compact, battery-powered preamp control module engineered for recording and studio work where surgical EQ precision shapes the source before it hits your interface or mixing console. Two concentric potentiometers handle all shaping—stacked bass and treble on one knob, stacked mid-range frequency sweep on the other—making this an intuitive solution for tracking active instruments or reshaping problem sources in tight signal chains. The circuit operates with minimal noise and maximum headroom, delivering transparent tone shaping from 9V portable operation up to full 18V studio performance.
Electronics & Signal Path
The preamp achieves a noise floor of -120 dBV and accepts instruments or line-level sources through a 1 MOhm input impedance. Bass and treble each provide ±12 dB of cut and boost (bass shelving at 20Hz), while the mid-range control allows a variable frequency sweep from 100Hz to 1kHz, giving you pinpoint control over fundamental character and mix placement. Output impedance of 2K Ohms ensures compatibility with standard audio paths and recording interfaces.
Power & Practical Specifications
The unit runs on 9V or 18V DC supplies (up to 27V maximum) and draws just 600 microamps at 9V or 740 microamps at 18V, enabling approximately 750 hours of battery life per cell. The included battery clip with buss connector and stereo output jack with battery switching simplify integration into both portable field recording setups and permanent studio installations.
Key Features
- Two concentric potentiometers: stacked bass/treble and stacked mid-range control
- Bass control: ±12 dB gain/attenuation @ 20Hz
- Treble control: ±12 dB adjustable gain/attenuation
- Mid-range frequency sweep: 100Hz to 1kHz variable
- Input impedance: 1 MOhm
- Output impedance: 2K Ohms
- Input-referred noise: -120 dBV
- Operating voltage: 9V or 18V DC (maximum 27V)
- Current draw: 600µA @ 9V, 740µA @ 18V
- Battery life: approximately 750 hours
- Includes battery clip with buss connector and four interconnect cables (2 red, 2 white)
- Stereo output jack with automatic battery switching
This is a professional-grade tone-shaping tool that prioritizes low noise, compact form factor, and extended battery performance—ideal for active instruments on sessions, bass tracking rigs, and studio signal chains where EQ precision matters to your final mix.
More Information
| Condition | New |
|---|
Reviews
At a Glance
The EMG BQC is a low-noise, battery-powered preamp that lets you sculpt tone with surgical precision using two concentric pots—stacked bass/treble and a variable mid-range sweep from 100Hz to 1kHz—ideal for shaping vocals, bass, guitars, or line-level sources in the studio or on recording sessions. Its -120 dBV noise floor and 2K Ohm output impedance ensure transparent EQ shaping that sits cleanly in a mix, while flexible 9V or 18V operation lets you optimize headroom for your signal path. Use it as an instrument preamp, bass shaper, or mixing console insert to dial in fundamental character and surgical mid-range control without coloration.
Who This Is For
| Best suited for | Studio Sessions, Live Performance, Home Recording |
|---|---|
| Tonal character | Surgical eq precision, transparent tone shaping, minimal noise, maximum headroom, low noise floor |
| Skill level | Intermediate / Advanced / Professional |
Frequently Asked Questions
What does the stacked potentiometer design mean, and how do I use it?
Each knob is concentric, with two separate controls on one shaft. One knob stacks bass (±12 dB @ 20Hz) and treble controls together; the other stacks a mid-range sweep (100Hz to 1kHz) with a fixed control. This design saves pedalboard or cavity space while keeping all shaping intuitive and accessible.
How long will a battery last, and what power options does it support?
Approximate battery life is 750 hours per 9V cell at normal draw (600µA @ 9V, 740µA @ 18V). The unit accepts 9V or 18V DC supplies, up to a maximum of 27V, so you can optimize headroom for studio or portable use. It includes a battery clip with buss connector and automatic battery switching via the stereo output jack.
What is the noise floor, and will it work in a quiet studio or live rig?
Input-referred noise is -120 dBV with maximum headroom, ensuring transparent tone shaping without audible hum or hiss. A 1 MOhm input impedance and 2K Ohm output impedance maintain compatibility with standard audio paths, making it suitable for both portable rigs and permanent recording setups.
Can I use this with active instruments, bass guitars, or line-level sources?
Yes. The EMG BQC accepts instruments or line-level sources through its 1 MOhm input impedance, making it versatile for active basses, guitars, microphone preamps, or mixing console outputs. Its flexible voltage range and low noise floor suit active instrument preamps, bass rigs, and studio signal chains.
What's included in the box?
The unit includes a battery clip with buss connector, a stereo output jack with automatic battery switching, and four interconnect cables (two red, two white) for quick integration into your rig or studio setup.
Do I pay sales tax on this order?
Sales tax is collected only on orders shipped to California; orders shipped to any other US state are not charged sales tax at checkout when you buy direct from our website. Marketplaces collect sales tax as the facilitator in most states, so the same listed price can cost more there. Buyers remain responsible for any use tax their state applies. Free US shipping and 30-day returns are included.
Compare With
Similar Gear
Complete the Rig
Gear that pairs well with this.
✨ For You
Based on what you've been looking at.