CalineCP-81 10 Band EQ Guitar Effect Pedal V3.0 - Use 500mA Power Supply (Not Included)

For the money, you cannot beat it. I use it for bass guitar. Great volume and gain control. More options than my Boss eq. Looks cool. How will it hold up? Regular gigging might expect the knobs to get damaged. They are lit but not solid knobs. The casing is metal. It does not have the built-in noise suppression like the MXR. Nor the price. You can run the outputs to two different amps. I don't. Home, studio and small gigs I would recommend this for. For this price point. You cannot beat it.

Purchased this for Van halen songs. Became my stay on pedal. Works well, no problems with noise, the lughts make it hard to read the setting shifters but its a nice feature. Chassis is tough. I would recommend it.

Does exactly what it's supposed to do and for a cheap pedal it does it very well. Runs on 9v DC power. The amount of noise induced depends on where in your chain you place this and on the power brick you use, I put it after my distortion pedal for the best results and make sure you get a quality power brick for this. I've noticed that many effects pedals are sensitive to the power brick you use and while many have the right voltage and current ratings the bricks themselves induce noise on your signal!Edit 10-15-2021: 10 months later this pedal has spontaneously started producing noise and the tone is drastically worse than when I first bought it. I have not been using it heavily either. You may want to look into a different pedal.

The Caline EQ works great. Low Noise, effective control over a wide array of frequency bands, True Bypass with a musical quality result....nothing sterile or harsh here. When they say use a negative tip 9v 500ma adapter they're not kidding. I did have on hand an adapter that met those specs, at least on its label, but when connecting it, the Caline unit lights would blink on and off and produce an accompanying bleeping on and off noise. Turning to a OneSpot power supply serving only the Caline, the result was stellar. This is an extra-fine unit but DON'T scrimp on the power supply and you will be quite satisfied.

I'll update this review as time goes. The pedal I bought as an inexpensive option to the M108S 10 band eq.Main points:- this Caline is that it has the SAME opamps inside as the more expensive MXR.- the green LEDs (the v1.0 were red) are not insanely bright which is great- the volume fader only cuts, not boost on v2.1- you need a 8.5-9.0vdc power supply for it to work correctly. It also needs at least a 300mA rating, though the pedal draws about 92mA at idle without a signal.- YOU DO NOT NEED AN 18VDC POWER SUPPLY!!***the pedal has a creative circuit that takes incoming 9vdc volts and steps it up to 18VDC to give you the extra headroom like the MXR! While you can use an 18VDC PSU it will likley cause more noise on your signal. Read on as to why...Unfortunately v2.1 of the PCB inside has a design flaw in the voltage circuitry which causes excessive white noise and many will return the pedal because of this. It can be corrected by running it at EXACTLY 8.5VDC to 8.6VDC. if you run at 9.0VDC +/- 0.1 you will get too much noise.Unfortunately the v2.1 PCB board has a problem with too much hiss noise when engaged. This is coming from the voltage step-up circuitry. It is missing noise suppression components that should have been there.After contacting Caline directly in China. They sent me the schematics of the pedal to troubleshoot. Providing my findings in addition to showing them a video of the problem, their product development specialist, engineer, and I figured out the issue.They sent me at no cost to me a new v3.0 of the board. I can happily say that noise is now gone! The noise floor is exactly equal now to the more expensive MXR.***The volume fader for v3.0 operates without adding gain. Caline said this was intentional to prevent overdriving the preamp section of amplifiers. However there are instances where you want to do that. To modify the volume fader to work like the gain fader (like on the MXR) you need to remove R59, a 4.7kohm resistor, and replace it with a jumper wire or solder blob to bypass it. The resistor adds series resistance on the fader limiting the gain. Removing/bypassing it will give you 12db of Post-EQ gain at the output jacks.Overall a great pedal for the money. I'm grateful for the amazing customer service directly from Caline Technologies. Will update everyone on my collaboration with them. I have made videos online documenting my progress. All the best!

When it works, it is a fantastic EQ. Good enough that I bought two. My main criterion was low-noise, since oddly little attention to OpAmp noise seems to be given even with some highly-rated, brand-name EQs. I say "oddly" because when (as is often the case in a guitar rig) this is the first pedal you plug into, ANY noise it produces gets amplified by orders-of-magnitude by the chain of compression, overdrive, and distortion that generally follow. And I can attest that this one does indeed use decent low-noise OpAmps, barely any injected noise even when amplified outrageously.But all that isn't what prompted me to write this review. Rather, It was that one of the units failed about 6 months after purchase, and after almost a year the other unit has just done it's first drop-out.Normally it would drop-out for a second, but more frequently over time, until now, when it doesn't pass any sound at all in the EQ-on footswitch position (bypass still works, but then that's "true bypass", so expected). Notably, the green EQ and volume lights are still on even though the EQ doesn't work.And the weirdest part is that far from being overused, time itself seemed to be it's demise-- if I didn't play on it for a month, it would be worse, then worse after another month, etc. until what I see now. Which makes me hope it's just some connector/switch/cable problem. But the way it would cut out made me think it was something in it's power circuit-- maybe it's doing some sort of conversion.