Rockville REQ42-B 19" Rack Mount Dual 2 X 21-Band Graphic Equalizer Black | 42 Total Bands, RCA Inputs/Record Output, 3.5mm Aux Input, Dual VU Meters, LED Display, Removable Rack Ears
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Availability:
In Stock.
Arrives
Monday, Jul 20
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Color: Black
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.
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.
Item Weight: 6.5 pounds
Product Dimensions: 19 x 12 x 6 inches
Item model number: REQ42-B
Is Discontinued By Manufacturer: No
Date First Available: July 21, 2014
Color Name: Black
Connector Type: RCA
Standing screen display size: 19 Inches
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Jul 20
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Silver
My prior EQ has been on onr stereo unit of mine or another for 40 years! A few years ago, it started giving me problems and I bought another EQ which really let me down to the point where even though the old one was flaky, I connected it back to my stereo. But it was time to say goodbye. I purchased this one and got it the other day. I like having all the bands to shape the sound as you desire and also the fact that you can control each speaker separately with two separate bound waves. The blue lights are cool looking but I would admit that would be nice to be able to dim them or shut them off, as they are staring back at me and are very, very bright! But it sounds good. I didn't think an EQ made that much difference on the sound as far as the unit itself, but after buying the other one that I pulled back out of the system, I found out that it does! I've only had it a couple days - but so far, so good. Hopefully, I will get many years of use out of it. I would love to purchase a fully remote control unit one day if they have them. But other than that, it seems like a really good unit at a very fair price!
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Reviewed in the United States on January 11, 2024 by Man on fire
Color: Black
I bought a pair of bookshelf speakers to use with my computer, and the bass and treble control didn't give me any range, (the base all the way up or down sounded the same). This was easy to hook up and does the job probably too well, meaning that 21 bands is a little overwhelming, but in my case I only had to set it up once. I'm happy with this purchase, the only downside to me is it has to be on to get any sound, (the display not the equalizer, the equalizer can be turned off or on), however my speakers have two sets of speaker jacks, so I hooked up line one to the computer and line two to the equalizer, hope this helps.
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Reviewed in the United States on May 17, 2026 by randy
Color: Black
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!!!!!!!!!
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Reviewed in the United States on July 18, 2023 by JC
Color: Black
Good quality product. There are a few things to improve Aesthetics: size and material of the brand name; instead of serigraphy an engraven in metal finish would be more appealing. The fluorescent graphics section should off when there's no signal. Leds on the bands controls should be dimmable. Sound quality is excellent.
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Reviewed in the United States on April 8, 2026 by Leonardo Formigo
Color: Silver
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.
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Reviewed in the United States on November 9, 2025 by Mario G.
Having an all-silver component setup, it was nice to find something in a matching color with lots of pretty lights on it to add to my system. However, that's about all this EQ is - pretty lights. The sound quality overall isn't bad, but when the EQ is enabled, there is a high pitched background noise coming through the speakers. I know it's not an issue with any other component in my system because it doesn't come through when the EQ is disabled (set to 'direct' on the system) and wasn't present before I added this unit into the mix. I tried different inputs, changing out cables, setting all of the sliders to 0, etc. but it's definitely an issue with the wiring/grounding in the EQ portion of the unit itself. It's not noticeable when a loud song is playing but is intolerable during quiet portions or when nothing is playing. As other have said, the LED's on the sliders vary in brightness (and the brightest ones are very bright) so that's a drawback on an otherwise quality appearance. Many of them also crackle when being adjusted - nothing some pot cleaner wouldn't fix - but brand new out of the box there shouldn't be any oxidation on the contacts so that's another issue for my unit. I was also disappointed that the spectrum analyzer is only four bars on the right side of the display (nothing is displayed on the left side, seems a waste of space) and there is no customization - it cycles through different display modes on its own accord but doesn't allow you to select one of your choosing. In the user manual, it says it features dual VU meters. If there is a way to display a second one on the left side, it doesn't say how in the manual and all of my fidgeting with the buttons didn't make it happen either. Overall, it's not a bad product for the money, but it isn't without it's problems and a high-pitched background noise is not worth the improved sound otherwise. It may just be my unit with a loose connection inside somewhere but I'm not going to open it up to try and fix it. I'll give it a few more days to see if it's the type of issue to subside over time but I suspect I'll be returning it and shelling out a bit more for an Akai EA-A7 I was eying up before I pulled the trigger on this...
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Reviewed in the United States on June 4, 2019 by Doctor Octoroc
Color: Silver
Fantastic
Reviewed in the United States on May 30, 2026 by Amazon Customer
Color: Black
Frustrated with the quality of music from several surround systems I have had that were made for movies, I restored my Cerwin Vega AT-10s and purchased a Yamaha receiver to play my tunes. I don't consider myself an audiophile. I just like loud, clean music with plenty of low-end (which is why I restored the Vegas). I purchased an Esinkin Bluetooth audio adapter and the Rockville RQ42-B because I wasn't pleased with the bass response from only the receiver. Not being very knowledgeable of how to get more bass, I took a chance on the Rockville equalizer. I am extremely satisfied. I read all the reviews about the plastic feel of the sliders. They do feel a bit flimsy but I rarely adjust them after my initial set-up. Also, there is not much "play" with each slider since they are so small. The slider lights are bright but not distracting for me. The LED display appears to be purely for show and does not indicate a level of any band. I have my Bluetooth connected to the equalizer and the equalizer to the receiver so I can play music from my phone. It works flawlessly. I can rock out the house cleanly and annoy my wife and neighbors with great stereo sound. If you are on a small budget and want to improve your sound, get the Rockville RQ42.
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Reviewed in the United States on November 12, 2022 Reviewed in the United States on November 12, 2022 by M. Sims