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Availability:
In Stock.
Arrives
Saturday, Oct 24
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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
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:
Saturday, Oct 24
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
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.
Color: Black
I was a little disappointed in reading reviews and finding out there was no spectrum analyzer, but no biggie, my main reason for getting this was to be able to adjust the sound profile more discretely, and this Rockville unit allows me to do just that. I have this hooked up to an old Yamaha AV receiver (before HDMI was a thing) and I have an old Kenwood dual tape deck, a turn table, and a 5-CD Harmon Kardon CD carousel. The tape deck is a new addition rescued from neighbor's trash so I was just glad it played. It sounded OK but a little muddy. Passing it through the EQ made it much crisper and brighter. My wife remarked that she was hearing things in the music that she hadn't noticed before. CD playback was better than it's ever been out of this receiver and speakers. Turntable is having an issue but that's not anything to do with the EQ. And FedEx delivered this a full week earlier than expected! If you're looking to set up an old-school 80's/90's component system, this EQ is a great addition. And the "spectrum analyzer" is pretty.
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Reviewed in the United States on November 16, 2022 by Bigstuff
Color: Black
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.
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Reviewed in the United States on November 3, 2024 by Gus McCrae
Color: Black
Title: Good EQ — RCA connections were my only headache The EQ itself works well and gives me the control I wanted over the sound. My only real frustration has been with the RCA connections. I was using gold RCA connectors that fit pretty tight, and sometimes unplugging them would pull harder on the EQ’s RCA connections than I liked. I’m not completely blaming the EQ for that because the connectors themselves may have been part of the problem, but it became enough of a pain that it’s worth mentioning. As far as actually adjusting and shaping the sound, I’ve been happy with it. Does its job well. I’m taking off one star mainly for the connection headache. 4 stars.
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Reviewed in the United States on August 24, 2026 by Syntax
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
A liitle bit of extra noise added to the signal path. Not a high end product. Short throw on the EQ sliders make it hard to adjust. Overall it works well, and happy with it so far.
Reviewed in the United States on May 27, 2026 by Terry Erhardt
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
Great product, work great
Reviewed in the United States on September 11, 2026 by MORGAN OGBONNA