---
product_id: 278385474
title: "BQC 4-knob Active Bass Preamp System"
brand: "emg"
price: "$412.77"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/278385474-bqc-4-knob-active-bass-preamp-system
store_origin: US
region: United States of America
---

# Active bass guitar preamp system 4-knob precision control Mid-frequency sweep 100Hz-1kHz BQC 4-knob Active Bass Preamp System

**Brand:** emg
**Price:** $412.77
**Availability:** ✅ In Stock

## Summary

> 🎸 Elevate your bass game with precision tone control that commands the stage.

## Quick Answers

- **What is this?** BQC 4-knob Active Bass Preamp System by emg
- **How much does it cost?** $412.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/278385474-bqc-4-knob-active-bass-preamp-system)

## Best For

- emg enthusiasts

## Why This Product

- Trusted emg brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Total Tone Command:** Master your sound with Active Balance, Master Volume, and EQ circuits all in one sleek system.
- • **Dual-Stacked EQ Pots:** Fine-tune bass, midrange, and treble independently with innovative concentric knobs for seamless control.
- • **Lightweight & Compact:** Weighing just 218g with a sleek basswood back, it fits perfectly into your rig without weighing you down.
- • **Midrange Frequency Sweep:** Dial through 100Hz to 1kHz to sculpt your mid frequencies exactly how you want—boost or cut with precision.
- • **Flat Response Center Detent:** Easily reset to a neutral tone with a tactile center detent for balanced sound clarity.

## Overview

The EMG BQC 4-knob Active Bass Preamp System is a compact, lightweight control unit designed for bass guitars, featuring Active Balance, Master Volume, and a versatile EQ with dual concentric pots. Its standout feature is a midrange frequency sweep from 100Hz to 1kHz, allowing precise tonal shaping. Crafted with a basswood back and weighing just 218g, it offers professional-grade sound customization in a sleek package.

## Description

EMGBQC 4-knob Active Bass Preamp System

## Features

- A complete control system for bass guitars
- Active Balance, Master Volume and EQ circuits are included
- The EQs allow you separate control over bass, midrange, and treble all via 2 concentric/stacked pots
- Rotate the control clockwise to boost, counterclockwise to cut
- There is a center detent for flat response.The mid-range control has a variable frequency knob to sweep through the mid-frequency range from 100Hz to 1KHz.This selects the frequency to boost or cut

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 218 g |
| Product Dimensions | 12.7 x 10.16 x 7.62 cm; 217.72 g |
| Item model number | BQC SYS |
| Back Material | Basswood |
| Color Name | Black |
| Connector Type | / |
| Number of Strings | 4 |
| Material Type | Synthetic |
| Output Wattage | 4 Watts |
| Size | One Size |

## Images

![BQC 4-knob Active Bass Preamp System - Image 1](https://m.media-amazon.com/images/I/61fE41edSAL.jpg)

## Frequently Bought Together

- EMG BQC 4-knob Active Bass Preamp System
- EMG PJ Active Bass Guitar Pickup Set, Black
- EMG BQS 5-knob Active Bass EQ System

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/278385474-bqc-4-knob-active-bass-preamp-system](https://www.desertcart.us/products/278385474-bqc-4-knob-active-bass-preamp-system)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-06*