Nobsound 9-Band Stereo EQ Preamp: HiFi Equalizer Audio Processor with Tone Controls | 111dB SNR | 0.001% THD | 2 RCA in/Out | for Home Stereo Audiophiles (EQ9)

Exactly what I needed. If you're not getting the sound you want from your system, get this EQ. Modern receivers only have bass/treble adjustments. That's essentially the same sound-shaping ability of an AM car radio from the 1960's. The essence of most recordings is in the midrange. Less bass + more treble does not equal midrange. This very inexpensive EQ allows for decent boost of the correct frequencies for accurate sound. I run my turntable into a tube preamp then to this EQ and into my Onkyo receiver. The only thing I've noticed is that at higher volume levels, I need to adjust frequency levels. I highly suspect it's my Klipsch speakers that are responsible. Klipsch, like Cerwin Vega, really like to be pushed to Police- call sound levels to sound good. At lower volume levels, this EQ still shines. It can remove most of the brassiness of poor classical, jazz, or Calypso recordings without muddying the bass and mids. This is a great entry-level EQ. If you're new to equalization and want to tweek your listening experience, get it. It's a good EQ for 60 bucks. Frequency attenuation is very good at all levels. Knobs are smooth with no distortion. Takes up very little room. I can't vouch for its ability to "warm up" digital recordings. It would depend on how it's inserted into the chain.

Good things come to those who wait. After a long journey from China the equalizer finally made it home. The equalizer does make tangible changes in the sound of the amplifier it is hooked to , which is a Yamaha rs202. Not putting the rs202 down, but " barefooted" , which simply means with no equalizer, the rs202, at least my particular one, lacked in the middle to upper frequencies. I knew bass was adequate as is in my case, so only the last 3 nobs are above flat. I already knew I didn't need lower frequency increase. It is obvious the equalizer is a preamp. It uses that preamp to effect changes in the amplifier input. All nobs do increase or decrease tonal quality, and I wanted them to be capable of doing so. As previously stated, only the upper frequency ,last 3 nobs are above flat. I have found what I call " Cyberspace ", or " virtual equalizers in android phones and mp3 apps " weird out " and are inferior to an actual, material equalizer, and that even on a flagship samsung. I have never experienced a " Cyberspace " or " virtual equalizer that actually allows " normal " equalizer tone , frequency response adjustments unless they " like " the equalizer adjustments. If " Cyberspace " and " virtual equalizers don't " like " where someone sets them they are weird out and are more than basically worthless. They are worthless unless they are set to very limited overall settings that the Cyberspace and virtual equalizers like to be set. This tangible, material equalizer made of matter is not like that. It will do what the user wants without weirding out. In other words it is my experience that a material, tangible equalizer is superior to phone and specifically android equalizers in Cyberspace and virtual equalizers that don't exist in the world of matter. In order to effect change by phone streaming requires " hardwiring " by a usb to rca plugs adapter. It will not eq phone streaming by Bluetooth because it's not in the line inputs and outputs to do so. Usb c to rca male patch cords are inexpensive and abundantly available. They work. Concerning this particular equalizer, not only do I not regret this product and purchase, but I am glad I did it. Shipping speed is slow because the product was not in a warehouse in the United States. It shipped individually from China. I finally got it. It has been welcomed home, and initially is functioning correctly. The rs202 Yamaha is not a high end 2 channel amplifier, so it needed an equalizer/ preamp to help it output a sound with more " presence " and treble. This equalizer has caused it to do that. It was worth the wait of getting it from an origin Shipping source in China instead of the United States. It took longer to get it than usual, but it was worth the wait. As previously stated, there is no hum , or any other sound negatives about it. If it adds distortion, it is less than detectable by my good ears. I have good hearing and I don't hear any distortion at all because of the equalizer. What I hear is better presence and treble, which is what I needed. This product is good, and I recommended It based on my particular experience so far. I just got it today. 5 stars. Update August 26, 2025 Just bought another one and it has markedly improved the sound quality of my other main stereo system. It is a preamp, in addition to an equalizer. It has improved presence and clarity, as well as volume. Very pleased. It does change the sound by preamp as well as eq. Might not be for a " sound purist " who doesn't want to alter the sound in the " signal path" but thats exactly what I wanted and it definitely alters the sound, which is exactly what I wanted it to do.It makes it sound better. Thats the idea. I don't care if it alters the signal path when it makes it sound better. Thats the whole idea here in my place. No distortion or hum . Bravo!

Petty complaint but why when most audio equipment is black or silver is this unit painted grey? Not a big deal but aesthetics are part of audio appreciation. As for the unit itself it is quite different from other equalizers I have had and a current equalizer I continue to use. The controls shape the sound differently but the result is clean and quite pleasant revealing a detail and clarity which is different than the one I have been using. I would agree the unit is more subtle but I like the difference and that subtlety is a refinement. It is well done and a real value in my opinion. You don't have to spend a lot to get quality audio. I would add this to the list as an addition in that direction.

This is a very good equalizer. Be careful of a HUGE user error that I made! I did not realize that the knob on the far right was a balance control, and since I had it turned to the right, one of the stereo channels was not working (or so it seemed). I had shut off the left channel without realizing it. Stupid me. The amount of band separation is great, allowing me to fine tune the audio. I use this to clean up the audio from my Android device via a Bluetooth receiver. The receiver goes into the EQ, and then into my stereo amp. Great way to get rid of the "flat" sound that is delivered from the various streaming services. I now get better bass and treble, and can tone down the mid-range. One drawback of this type of device is that by having knobs for each frequency band, you cannot see exactly how you have each range adjusted, which you can do with sliders. However, the only EQ devices with sliders that I found were mostly "rack" systems (who does this anymore?) So, if you want to tweak different audio types or music sources, you will need to look closely at the mark on each knob to see your +/- db adjustment level. Again, for the price of this device, that is acceptable. It does really improve the quality of digital music sources that have been "dumbed down" or flat. I would HIGHLY recommend this to anyone who is looking to improve the sound from their devices. You can feed audio out from an Echo device, either using a mini-plug to an RCA adaptor cord, or through any inexpensive Bluetooth receiver that you can find on Amazon. If you have an external amplifier to drive your speakers, you will be a much happier music listener.

This item is a semi-parametric equalizer and is surprisingly good! The price is right (around $56 USD) and the unit is NOT plastic but a well built small box that fits anywhere in the system. I have it installed on a Denon aux output into the main stereo buss and it sounds great! No quality interference and enough amplification boost to push it over the top. The EQ is fairly accurate and well balanced the signal or in this case, the room acoustics. I would definitely buy a few to inexpensively upgrade smaller systems. You won't break disappointed.

Not good. Sound quality poor. Distoetion.

It's nice but noisy. nicely made heavy metal box. frequency controls has nice positive center points but whole 6 db range from click to click is not enough if you get used to classical 12DB range. mine was too noisy in my systrm with 103db sensitivity speakers So I returned it. your mileage may vary.

Wow this tiny EQ completely enhanced my two cabinet speakers audio quality. I have these connected to a crown xli2500. The original source is a yamaha 7.1 receiver then to the crown. I was using the yamaha built in EQ and thought it sounded good. Bought this EQ to see if I could hear a difference. So, it's been 3 days with this small EQ and I can say it made a big difference. The biggest difference is in the bass output. My goodness I have bass coming from the cabinets that I couldn't hear before. All in all I love this EQ.