HiFi 9-Band Stereo EQ Preamp Analog Equalizer Audio Processor for Home/Car (EQ9)

It's great! Just connect your PC/Laptop audio output/Headphones output into EQ in. Then EQ output into your Amplifier input.

It's small... but that's why I bought it! I'm not 100% convinced on the audio quality, but it's good enough especially for the price. I bought it to use between my TV and external amplifier/speakers and it serves me well for this purpose.The two switch selectable and bypass function inputs are very useful.

I needed a tonal correction on my hifi, as the speakers were too close to a back wall.This super little device allowed the bass heaviness to be corrected while not boosting the high frequencies. Very clean sound. Minimal quality impact.I do find the channel selector a stiff control to turn..probably as it is such a small diameter.Functionally it can be inconvenient that the output channels both stay live, as only the input channel is switched.It would be great if there was a volume control on this model.. but overall it's great, and excellent value for money.

I use a Fluance RT85 matched to a valve preamp attached to a Muzishare x5 valve amp. I picked this unit up for lowering the bass when needed. Sadly, when plugged in, the device dums down everything making it all sound quite soft. If i adjust the dials...i struggle to hear any difference (actually no difference adjusting the balance knob either).Sounds just great if i press the Bypass button, ok fine, but then the things pointless.Stay away from this poor equalizerAlso its very fiddly.

Going from amazon echo into an external set of speakers doesn't allow you to alter the mid, bass amd treble. Having 9 bands inline going down to 20Hz is superb. Very happy with device, sounds superb on my desk setup

Neat, well made. 10/10 for sound quality. The subtle lift and cut is ideal for those not wanting extreme tonal adjustment. Quiet and not noting any degradation to sound quality.

I bought this a few days ago ago from another site.I use it between an CD player and amplifier. The end result is subjective preference of band amplification. It’s clean, no noise at all from the unit itself. I have not tried the included power supply yet as I had an 12v on hand which also does not introduce any noise into my system.The knobs are plastic but very well scaled to the unit in size. The knobs turn very smoothly but firmly and with a good centre click. The gain is not heavy or too light on each band, it’s very, what can I say, balanced in a sense with no drastic or sudden amplification, again very smooth.The build quality is excellent, especially given the price of this thing. It’s a very robust metal box.The RCA’s are fixed quite firm, no excessive movement and 2 in 2 out which is great for adding a second device like a tablet especially if you use an iPad with Apple Music as iOS does not include manual EQ unlike MacOS and the Windows version.This thing is tiny, super portable, I am used to 32band 19 inch rack EQ and so when I unpacked the EQ9 I was fairly taken back by the diminutive size. Though it is a tiny box it has a good weight to it and will not flip up when cables are attached.There is a Tone bypass button on the rear which reveals the gain difference from the original source and it does it very well will no electrical pops. Balance knob works perfectly for panning left to right. On-off/Channel selecter knob has a firm and satisfying click.For the modders out there this little unit has 12 Ti NE5532 op amps inside which are replaceable. I have some Philips NE5532 op amps here which in my opinion are better than their Texas Instruments counterpart, everywhere I have used the Philips version bass has improved with clarity and speed, better instrument separation across the all frequencies.How the Philips’s will transpire in this EQ is yet to be seen as it’s a single band per op amp rather than a class d amplifier but we will see at a later date.The opa1656 and 1622 may work very well here to for their clarity but I am not sure if the would fit in and at the current price 12 of those would be expensive. Rubycon caps throughout.Very pleased with little unit from Douk Audio/Knobsound it’s does a fine job, aesthetically and sonically very clean. This may be a controversial point but after a few hours of use between the Denon DCD-900NE and Amplifer the sound of the EQ9 itself has improved becoming more clear and precise so I would say that although this sounds clean and clear straight out of the box, it will and does get better after a few hours of burn in too.This is another little win for Douk Audio here in my opinion and the end user like ourselves. This is a handy tool for a lot of use cases including those whom may have trouble with hearing due to age etc. This little unit will tweak those higher frequencies very nicely and possibly allow the hearer to recapture what they may have lost naturally over time. Good stuff!