--- product_id: 5110809 title: "REQ42-B Black 19\" Rack Mount 2 x 21 Band Graphic Equalizer EQ" price: "€ 249.66" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.pt/products/5110809-req42-b-black-19-rack-mount-2-x-21-band store_origin: PT region: Portugal --- # Blue LED sliders & multi-color display 2 x 21-band EQ precision 19" rack-mount ready design REQ42-B Black 19" Rack Mount 2 x 21 Band Graphic Equalizer EQ **Price:** € 249.66 **Availability:** βœ… In Stock ## Summary > πŸŽ›οΈ Elevate your sound game with precision and style β€” don’t just hear it, own it! ## Quick Answers - **What is this?** REQ42-B Black 19" Rack Mount 2 x 21 Band Graphic Equalizer EQ - **How much does it cost?** € 249.66 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/5110809-req42-b-black-19-rack-mount-2-x-21-band) ## 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 - β€’ **Dual 21-Band Mastery:** Fine-tune every frequency from 20Hz to 20kHz with unmatched precision. - β€’ **Visual Audio Command:** Blue LED sliders and dual VU meters give you real-time, crystal-clear level monitoring. - β€’ **Lightweight Durability:** Robust black metal chassis weighs just 6 lbsβ€”built to perform at home, studio, or live events. - β€’ **Versatile Connectivity:** RCA stereo input/output plus front 3.5mm MP3/iPod jack keeps your audio sources flexible and ready. - β€’ **Seamless Pro Integration:** Standard 19" rack-mount design with removable brackets fits effortlessly into any professional setup. ## Overview The Rockville REQ42-B is a professional-grade dual 21-band graphic equalizer designed for precise audio control across the full 20Hz-20kHz spectrum. Featuring blue LED sliders, multi-color displays, and dual VU meters, it offers real-time visual feedback for flawless sound tuning. Its 19" rack-mountable, lightweight metal chassis ensures easy integration into any studio or live setup. With versatile RCA and 3.5mm inputs, this equalizer is the perfect tool for DJs, sound engineers, and audio enthusiasts seeking affordable, reliable, and detailed sound customization. ## 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: Great product, work great - Great product, work great ## 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 | #37,164 in Electronics ( See Top 100 in Electronics ) #1 in Audio Component Equalizers | | Customer Reviews | 3.9 out of 5 stars 1,118 Reviews | ## Images ![REQ42-B Black 19" Rack Mount 2 x 21 Band Graphic Equalizer EQ - 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. ### ⭐⭐⭐⭐⭐ Great product, work great *by M***A on September 11, 2026* Great product, work great ### ⭐ DO NOT waste your money on this GARAGE piece of worthless electronic crap *by G***E on November 3, 2024* Following the precise directions in the user manual for this Rockville equalizer, it did NOT allow any configuration that allowed either my brand new phonograph, or my dual cassette Tape deck to work with this equalizer. I was able, I think, to get my CD player to work when connected But due to the MORONIC and useless constant EQUALIZER screen digital flashing that occurs as soon As you turn this unit on and which persists regardless of whether you have any music playing – which is UNBELIEVABLY FREAKING STUPID – I have no way of knowing if the equalizer is actually being applied to the CD being played. Furthermore, when I connected a external mp3 player to the mp3/aux port on the Front of the Rockville unit – that did also NOT WORK. Zero sound. This product is piece of pure garbage and I strongly advise against ANYONE purchasing it. ## 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/5110809-req42-b-black-19-rack-mount-2-x-21-band](https://www.desertcart.pt/products/5110809-req42-b-black-19-rack-mount-2-x-21-band) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-22*