Question about Mackie cfx20 mkII compact mixer

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Slider repair pots

Where can I obtain an EQ slider pot or the EQ slider assembly?

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Posted on Jan 02, 2017

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SOURCE: I need 2 channel (sliders)

The best way is to contact Mackie support directly. They are extremely helpful. Please note that these units are not the easiest to access. Extreme care must be taken when dis-assembling them to prevent damage to the internal cables. The contact information is listed below. Just follow the link and either send an Email or call them directly. Also, have the serial number handy as there have been a few mods in the lifetime of the 1604 model



Posted on Aug 15, 2010

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Peavey KB100 EQ pots what value?

should say on the back of the pot

Mar 02, 2015 | Peavey Music

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Low volume one speaker

It seems likely that the pot (volume control) is dirty. with a slider you can normally get fluid down the side of the knob, your's is a rotary control and you sometimes can do it round the shaft of the pot but more often have to spray it in where the connections go into the pot. You'll need some contact cleaner spray which you can get online or from an electronics store, get it onto the pot track and then take the pot to each end of its travel a few times, this'll probably sort it out until next time. If you're taking it apart it might be worth just getting a new and better pot and soldering that in if you are hand with a soldering iron. The ones in Mackies nowdays are pretty sh1t.

Feb 08, 2014 | Mackie MR5 MR5 Reference Monitor

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Slide pots for PV14 mixer

The pot needs to be cleaned. Get a spraty can of DeOxit 5. Spray it into the track and move the slider up and down a number of times. If that doesn't fix it, replace the slide pot.

Jul 30, 2012 | Peavey Electronics Peavey 00512140 PV 14...

1 Answer

I have a behringer MX2804 which has 3 faulty channels, they allow a small signal to go through them but it appears to be the gain controls that do not work properly. Does anyone know what the problem could...

If the problem appears to be the faders, you can try putting a little CRC226 into the center of the slot of the faders. You can get this in the electrical dept of Home Depot. Use of Deoxit and other cleaners destroy the lube in the pots and then wear of the slider causes failure. Replacing the pots requires a lot of labor to access the pots, namely removing knobs and screws. Great care must be used in removing the pots from the circuit board as use of non-professional desoldering tools often damage the board. These have ROHS solder requiring higher temperatures for removal and use of manual desoldering plungers and solder wick usually lifts circuit traces destroying the board. If the CRC 226 doesn't fix the pots, best take it to a repair shop.

Jun 22, 2011 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

Would you know how to correctly open a CFX20 to clean the pots?

Yopu do NOT clean the pots... if you have noisy sliders, get some CRC226 at Home Depot in the electrical dept. Spray a small bit in the center of the slot for the slider and run the slider up and down. Use sparingly and apply a tiny amount once more. The sliders are NON_REPAIRABLE if this won't fix them and major disassembly is required involving removing the round knobs, fader knobs, screws and other nuts on the jacks. Hours of work. Pots require desoldering tool and use of soloder wick and plunger type removal tools often causes damage to the circuit board.

May 27, 2011 | Mackie cfx20 mkII compact mixer

1 Answer

HI, I just need the value/taper of the 30mm slide potentiometer used in the equalizer of the Behringer K1800XF.

The sliders in almost all of the EQ's in Behringer are linear taper (B). The values are usually 50K. Fo replacement make sure you get matching mounting spacing. Almost all Behringer pots are made by ALPS.
Note that the rotary volume controls are G (graphic) taper, often 50K and are hard to get. trying to get these from the Behringer parts distributor was futile... gave up after 4 months wait.

Apr 28, 2011 | Behringer Ultratone K1800fx 180w Keyboard...

1 Answer

I have a 92 Gibson T Bird with ebony fretboard, and a new one with rosewood fretboard. my old TBird doesn't have the brilliance in the highs as the new one does... i changed all the pots yesterday, with...

The most I can suggest for getting the shine back to the bass is to run an EQ before your preamp. Make sure all sliders are set to zero, then raise the higher frequencies until you get the sound you're looking for. This won't lose any growl, just accentuate the brilliance.

The best EQ to use would be a BOSS Bass Equalizer. You can use the same on your old T-Bird to accentuate the lower frequencies, and get almost the same sound.

Hope that helps!

Jan 09, 2011 | Gibson Thunderbird IV Electric Bass Guitar

1 Answer

I have an older XR 696f. Very similar layout. Want to know how to open case to replace EQ controls and one input channel.

The part number for the level pots is

POT0259 71190259 71190259 50KB - STD - 9MM - W/DTT

Now that says a STD taper which could be standard audio taper...

The EQ pots are going to give you fits to find them, here is info:

18 SPOT0459 71190459 71190459 DUAL 50K 20MM W TAPER W/DTT AND TAP

They are duals with not only a taper, but they have a tap in the middle of the resistance element... these are very special.

FRANKLY if these pots are noisy, treat them with CRC226 which is available in the electrical dept of Home Depot. Try to get the liquid into the resistance element wiper area.

Most of the work accessing pots on a mixer is pulling knobs and taking off the nuts of jacks. There are usually a few screws holding the board to the panel but they are obvious...

Thoise special pots you will likely have to get through Peavey.

Jul 20, 2010 | Peavey Xr 8600 8 Channel Powered Mixer

2 Answers

For 100 watts it doesn't seem that loud to me. Could I maybe add more speakers (2x10s)?

Our human perception of loudness can be way off. You should get a soundmeter and compare. There are some pretty good ones on eBay new for about $140.

Adding speakers may NOT increase the sound much as the power will then be split between the speakers.

Nov 02, 2009 | Fender Rumble 100 Bass Guitar Amplifier

1 Answer

Problems with certain channels and there gain pots

I assume you are talking about an audio mixer, here's what i think:

I'm not sure about channels 12 and 16, but channels 6 and 9 seem like having some loose solder contacts, which usually occur with long term use - you need to remove the problematic channel strips and check the solder contacts on any of the pots / switches / connectors that protrude through the top panel - resolder any loose or bad solder contacts (i usually resolder ALL pins on ALL connectors, pots and switches just to be sure).

As for the lower gain on CH12 - see if the mixing slider is connected via wires, if so, compare it to the connections on other channels, see if there is a loose wire or if the wires are connected in a wrong way (i had a "lower gain" issue with a mixer once that turned out to be a wrongly connected mixing slider - i obviously wasn't the first person to repair that mixer...)

Channel 16: check input preamp IC, could be a bad electrolytic filter capacitor or other components, possibly a faulty IC.

Hope some of this helps...


3rq8 (Triarcuate)

Sep 06, 2009 | Music

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