---
product_id: 5110809
title: "REQ42-B Dual 21-Band Graphic Equalizer, 19\" Rack Mount, RCA In/Out, 3.5mm MP3 Input, LED Indicators, VU Meters, for Studio and Live Sound"
price: "฿14457"
currency: THB
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.th/products/5110809-req42-b-dual-21-band-graphic-equalizer-19-rack-mount
store_origin: TH
region: Thailand
---

# RCA + 3.5mm inputs Blue LED sliders 42-band precision EQ REQ42-B Dual 21-Band Graphic Equalizer, 19" Rack Mount, RCA In/Out, 3.5mm MP3 Input, LED Indicators, VU Meters, for Studio and Live Sound

**Price:** ฿14457
**Availability:** ✅ In Stock

## Summary

> 🎛️ Own the sound spectrum — because your mix deserves precision and style.

## Quick Answers

- **What is this?** REQ42-B Dual 21-Band Graphic Equalizer, 19" Rack Mount, RCA In/Out, 3.5mm MP3 Input, LED Indicators, VU Meters, for Studio and Live Sound
- **How much does it cost?** ฿14457 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/5110809-req42-b-dual-21-band-graphic-equalizer-19-rack-mount)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual 21-Band Mastery:** Fine-tune every frequency from 20Hz to 20kHz with unmatched precision across two independent channels.
- • **Visual Audio Command:** Multi-color LED displays and dual VU meters deliver real-time, intuitive monitoring of your sound levels.
- • **Lightweight Durability:** Robust metal chassis weighing just 6 lbs, built to withstand live gigs, studio sessions, or mobile DJ setups.
- • **Versatile Connectivity:** RCA stereo inputs/outputs plus front-panel 3.5mm MP3/iPod jack keep your audio sources effortlessly connected.
- • **Seamless Pro Integration:** Standard 19" rack-mount design with removable brackets for effortless setup in any professional or home studio rig.

## Overview

The REQ42-B is a professional-grade dual 21-band graphic equalizer designed for studio and live sound environments. Featuring a full 42-band frequency range from 20Hz to 20kHz, it offers precise audio control with blue LED sliders and multi-color visual feedback via VU meters. Its 19" rack-mountable, lightweight metal chassis supports RCA and 3.5mm inputs for versatile connectivity, making it ideal for DJs, sound engineers, and audiophiles seeking reliable, high-fidelity sound shaping.

## Description

The Rockville REQ42-B is a professional dual 21-band graphic equalizer designed for precise audio control in live and studio environments. With a 19" rack-mountable form factor and removable brackets, it integrates easily into any standard setup. The unit offers RCA stereo input with front panel selector switch, a dedicated RCA record output, and a 3.5mm MP3/iPod input jack on the front panel for added convenience.Each of the 42 total frequency bands is paired with a blue LED slider, allowing for accurate adjustments across a 20Hz-20kHz frequency range. A multi-color LED display, individual LED indicators, and dual VU meters provide real-time visual feedback of audio levels. Weighing just 6 lbs, the REQ42-B delivers professional features in a durable and compact chassis that operates on 110V AC power.Perfect for DJs, sound engineers, or audio enthusiasts, this equalizer is a dependable solution for optimizing sound in live sound reinforcement, studio mixing, or home audio systems.

Review: It Works. - Of course, this is not the best of the home equalizer I have owned. This is the cheapest of them as I paid a lot more for the other ones. Simply, it does its job and I like it. Too many bands to adjust compare to my old ones (I still have one of them in use), therefore it is just a matter of practice to get used to that many controls to adjust. The spectrum analyzer is just an indicator of the input level not by frequencies but the overall sound, that is why it moves all the bars the same way always but it really responds to the overall sound input level. Another thing, most of the superior equalizers for sale, are more suitable for PA systems not necessarily for your home system but this one is. Even some people criticized the instruction manual, I don't need any kind of instructions to set up an equalizer to my home system, it is so basic. Recommended product for those who don't want to spend a lot of money and have some kind of experience in setting home stereo equipment instinctively, no instructions.
Review: Pretty good equalizer - Not a bad product ...actually it is very usefull : I match it with my vintage Pioneer tube SX-34 to compensate for the speaker low range side. Pros - the 21 band equalizer is pretty linear. Don't really care about the graphics since that is more of just a signal indicator. The slider pots are simple . For proper usage , use direct first to understand the baseline sound and then start with flat settings on the equalizer. There from there do some fine adjustments if needed. Cons - that blue LED is sometimes annoying at night , but not sometimes it is good too to know if adjustments is correct. I wish they add an override control on those. The graphic equalizer display is just for level indicator not really a spectrum analyzer . Still this is a pretty good equalizer .

## Features

- DUAL 21-BAND EQ: Fine-tune audio with 2 x 21-band graphic equalizers covering a wide 20Hz-20kHz frequency range.
- RCA CONNECTIVITY: Features RCA stereo input and record output with front panel selector switch and 3.5mm MP3/iPod input jack.
- RACK-MOUNT READY: Standard 19" rack-mountable design with removable brackets for easy integration into professional audio setups.
- LED VISUAL MONITORING: Blue LED sliders, multi-color LED display, and dual VU meters provide precise level monitoring.
- ROBUST BUILD: Durable black metal chassis weighs only 6 lbs and operates on 110V, suitable for home studios, events, or mobile DJs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #31,861 in Electronics ( See Top 100 in Electronics ) #1 in Audio Component Equalizers |
| Customer Reviews | 4.0 out of 5 stars 1,047 Reviews |

## Images

![REQ42-B Dual 21-Band Graphic Equalizer, 19" Rack Mount, RCA In/Out, 3.5mm MP3 Input, LED Indicators, VU Meters, for Studio and Live Sound - Image 1](https://m.media-amazon.com/images/I/61fgt7IT+QL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: I cant get the slide controls to change any kind of frequency. Can you help?**
A: There is a button that says EQ , if you do not engage the EQ your in bypass mode and there will be no Equalization . So press that button , but turn the volume to a lower level , because when the the EQ is engaged the volume will  bump up .  And also make sure your connections are  correct, stereo out to EQ in . If your not sure if your hook up is correct refer to you Stereo owners manual.

**Q: I realize that this unit does not have a spectrum analyzer, but where are the dual vu meters that are listed three times in the description?**
A: It has no VU meters.

**Q: How does the  spectrum analyzer work**
A: It's fake- it doesn't represent anything other than the overall level with a completely made-up representation of frequencies.

**Q: i have a sherwood receiver and yamaha speakers for outside deck,would this eq work for this?**
A: Depends upon the inputs and outputs for your receiver. Also depends upon whether your receiver supports an equalizer loop. Also depends upon whether you pipe other sources into your receiver or not. Don't take this equalizer outdoors, of course.

## Customer Reviews

### ⭐⭐⭐⭐⭐ It Works.
*by M***. on November 9, 2025*

Of course, this is not the best of the home equalizer I have owned. This is the cheapest of them as I paid a lot more for the other ones. Simply, it does its job and I like it. Too many bands to adjust compare to my old ones (I still have one of them in use), therefore it is just a matter of practice to get used to that many controls to adjust. The spectrum analyzer is just an indicator of the input level not by frequencies but the overall sound, that is why it moves all the bars the same way always but it really responds to the overall sound input level. Another thing, most of the superior equalizers for sale, are more suitable for PA systems not necessarily for your home system but this one is. Even some people criticized the instruction manual, I don't need any kind of instructions to set up an equalizer to my home system, it is so basic. Recommended product for those who don't want to spend a lot of money and have some kind of experience in setting home stereo equipment instinctively, no instructions.

### ⭐⭐⭐⭐⭐ Pretty good equalizer
*by J***G on December 13, 2025*

Not a bad product ...actually it is very usefull : I match it with my vintage Pioneer tube SX-34 to compensate for the speaker low range side. Pros - the 21 band equalizer is pretty linear. Don't really care about the graphics since that is more of just a signal indicator. The slider pots are simple . For proper usage , use direct first to understand the baseline sound and then start with flat settings on the equalizer. There from there do some fine adjustments if needed. Cons - that blue LED is sometimes annoying at night , but not sometimes it is good too to know if adjustments is correct. I wish they add an override control on those. The graphic equalizer display is just for level indicator not really a spectrum analyzer . Still this is a pretty good equalizer .

### ⭐ Sounded great for less than a year, Poor construction
*by J***C on July 18, 2023*

July 2023 // This EQ sounds great in my system. The only thing I see that I don't care for is the operation of the cheesy Level meter. It looks like a Spectrum Analyzer but only bounces up and down based on the input level and band settings. I would prefer a regular VU meter...LED or analog... the way this meter works cheapens the look of the unit to those of us that can grasp what it is actually doing. Despite what I see as a single flaw, It is a great little unit for the price. // Now November 26, 2023... After only 4 months the first of the level markers on the sliders has failed. I guess poor construction practices are a sign of the time.... Now 10 months later...on my second unit an on this one, way worse, all the spider lights are on and off all the time. Still sounds great, but lets be real....need to look like quality as well. Nov 30,2024- the left channel went static and failed. Not going to try a forth unit. Think I'll just trash this POS and look for one that offers at least for quality. DON'T BUY THIS!!!!!!!!!

## Frequently Bought Together

- Rockville REQ42-B Black 19" Rack Mount 2 x 21 Band Equalizer
- Tan QY 2RCA to 2RCA Cable 3Ft, Gold-Plated 2 RCA Male to 2 RCA Male Stereo Audio Cable for Home Theater, HDTV, Gaming Consoles, Hi-Fi Systems (3Ft/1M)
- Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-24*