Question about Mackie SRM-450 System

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Where can I buy Volume pots for Mackie srm450? I need 2 of them, preveous owner kind of abused the knobs, they wiggle and the sound cuts in and out. I checks the solder points to the circuit board. it's the pot it self, the shaft is loose.

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Www.mackie.com is the right place for sure.

Posted on Nov 08, 2013

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SOURCE: mackie srm450 the tops on one speaker is not working

Hi There, This is quite a common problem with the Mackie SRM450's. You will find that you need to replace the diaphram on the top. This can be done by removing the 16 screws from the back of the Mackie (quite a long pain in the **** job) with a long handled cross head screw driver.

Once you have done this you should then remove the hex bolts from the back of the drive where the black and right terminals are. When this is done, pull off the cover and swap the diaphram out. With the new diaphram in place reverse the steps above but before you screw the back on, power it up carefully and check the sound is now working.

If the diaphram keeps going eg every 3 to 4 months then you will need to change the driver which is quite expensive to do. If you need spares and are based in the UK, contact LondonSpeakerShop.com who carry spare parts or can undertake the repair.

Hope this helps.

Posted on Mar 05, 2009

  • 1 Answer

SOURCE: what kind of tool is needed to open mackie srm450

12" phillips screw driver total of 16 or 17 screws on back, then open like a **** its easy!

Posted on Nov 07, 2009

  • 1 Answer

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The Mackie SWA 1501 subwoofer is one on the best subwoofers but it's a heavy one. I have it since 2007 and have no problems with it, still working. I would recommend to buy the new SWA 2801z. If you're in germany check this site: Mackie Subwoofer in Cologne

Posted on Dec 20, 2009

  • 3 Answers

SOURCE: When turned on: srm450 has no sound, but all leds

1 TAKE THE MAINS PLUG OUT
2 Unscrew the fixing screws on the back. (just the outside ones)
3 Take the back off and turn the amplifier circuit board to face you.
4 About 2" from the left and about 4" from the bottom you will see a sort of tab. pull it off gently and widen the 2 prongs slightly.
5 Put the jumper tab back on and re fit the amp.

Posted on Feb 15, 2010

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1 Answer

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

2 Answers

Mackie 450, signal light off, Sound only comes out when amp. turned up above 75%, when usually used at 40-50%. too loud at 75% and UP, does not Work at ALL below 75%. only 2 years old, with 25 uses... i...


Doesn't sound like a fuse. They don't fix themselves when you reach 75%.

Try shaking the volume knob while in the 30-50% range and/or try (with the power off) rotating the volume knob numerous times from 0% to 100%. If when you plug it back in it responds ANY differently, you might have a bad volume potentiometer. If when you shake the knob you hear static or intermittent sound, you have a bad volume pot.

The only other thing I can think of is that the wiper of the volume pot is not in contact with the windings inside the pot until you reach the 75% mark. When the volume comes on at 75%, does it start off kind of "static" then come in loud and clear? Also try this.... adjust the volume pot to 74% (or when the sound just begins to come on). At this point shake the knob. If you hear static, replace the volume pot.

Unplugging it when still on shouldn't cause any damage... in fact it probably hasn't considering it works at 75% plus.

Mar 14, 2008 | Audio Players & Recorders

1 Answer

When I turn up the vol knob to max on the back of my srm450'sv1 they distort. Is that normal?


Pretty normal for almost any active speaker to distort at full volume, hope this helps.

Nov 22, 2012 | Mackie SRM-450 System

1 Answer

Blown Mackie srm450 woofer makes sound but rattles when turned up


I need more information, but some similar event i remember with SRM450 and was the paper cone on the speaker, not visible from outside but inside was severely cracked all round, hope this helps.

Apr 23, 2012 | Mackie SRM-450 System

1 Answer

When turned on: srm450 has no sound, but all leds (power and signal) is normal. If I turn the volume up (near maximum) , the srm450 sound is activatet again , and peforms normally. I then turn volume down...


1 TAKE THE MAINS PLUG OUT
2 Unscrew the fixing screws on the back. (just the outside ones)
3 Take the back off and turn the amplifier circuit board to face you.
4 About 2" from the left and about 4" from the bottom you will see a sort of tab. pull it off gently and widen the 2 prongs slightly.
5 Put the jumper tab back on and re fit the amp.

Dec 26, 2009 | Mackie SRM-450 System

2 Answers

My Mackie SRM450 appears to have a faulty volume pot. I have to tweek it in both directions several times and then it may come on but it's not reliable. I can relace the part myself but am unable to...


Inside the amp, on the back side of the circuit board is a tony Black Plastic "Jumper" with a "pull tab" on it.
If the pins have lost their 'straightness' from dropping the speaker or rolling it around in the van, the Jumper may be intermittently making contact.
Of course when full voltage is applied via the volume knob, there is enough to "connect" the jumper sleeve temporarily.
When you turn the volume back down, this repeates the cycle.
All you need to do, is remove the entire amp panel on the back, locate the "Jumper" (near the Volume Pot on the circuit board), straighten the pins, "clean" and inspect the jumper for "loose contacts" (very tiny parts in there!), and make sure it re-seats firmly.
This should solve the problem. If not, I would investigate a crack in the circuit board, etc...

Oct 07, 2009 | Audio Players & Recorders

2 Answers

What kind of tool is needed to open mackie srm450 speakers. I need to replace tweeter.


12" phillips screw driver total of 16 or 17 screws on back, then open like a **** its easy!

Jul 29, 2009 | Mackie SRM-450 System

1 Answer

Repair a Mackie SRM 450 Speaker The Speaker is making a crackling sound while playing. The sound keeps cracking up.


You probably need to replace the diaphragm. The diaphragm is located behind the back cap. Simply remove the back cap, remove the diaphragm, clean the voice coil gap with a piece of masking tape, install a new replacement diaphragm, reinstall the back cap. That it!
You can see videos on how to replace diaphragm at this link.
http://www.soundspeakerrepair.com/speaker-parts-c/INST/Installation+Instructions
You can buy a new Mackie SRM450 diaphragm at this link.
http://www.soundspeakerrepair.com/speaker-parts-cp/SRM450-DIA/DIA-Mackie/Mackie/

Jul 20, 2009 | Music

1 Answer

Mackie srm450 the tops on one speaker is not working


Hi There, This is quite a common problem with the Mackie SRM450's. You will find that you need to replace the diaphram on the top. This can be done by removing the 16 screws from the back of the Mackie (quite a long pain in the **** job) with a long handled cross head screw driver.

Once you have done this you should then remove the hex bolts from the back of the drive where the black and right terminals are. When this is done, pull off the cover and swap the diaphram out. With the new diaphram in place reverse the steps above but before you screw the back on, power it up carefully and check the sound is now working.

If the diaphram keeps going eg every 3 to 4 months then you will need to change the driver which is quite expensive to do. If you need spares and are based in the UK, contact LondonSpeakerShop.com who carry spare parts or can undertake the repair.

Hope this helps.

Feb 22, 2009 | Mackie SWA1501 Subwoofer

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