Question about Mackie HD1801 Powered Subwoofer (1600 Watts 1x18 in)

1 Answer

Power supply to rectify?? - Mackie HD1801 Powered Subwoofer (1600 Watts 1x18 in)

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Mackie Master
  • 5,603 Answers

Troubleshoot and repair... This MIGHT be schematic or close to the amp part:

Scroll down to "Get Manual" at the web page and click on it to download. The files are compressed but you can use the free decompressor to extract or view them.

Posted on May 26, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What causes the 60cyle hum when my peavey amp is on?
The AC power changes the magnetic field and may be being picked up in your amplified leads .

Or the DC voltage in your amps power supply is not filtering the power after it rectifies the AC power .A really big capacitor across the dc voltage output from the rectifier should filter any AC out.

May 26, 2017 | Peavey Music

1 Answer

Last night I took it to a performance,. I plug in the 2 microphones etc, the indicator shows there is inout to the amp as usual, but there is no sound from both speakers. And not even small noise from the...

Here you go:

Scroll down to "Get manual" on the webpage and click to download. IGNORE other download links. This is a class D amplifier and the switching power supplies run directly off the power line so as a qualified technician I am sure you know to use an isolation transformer while working on this for personal safety. I am GOING to make an educated guess at the problem... The circuitry has a surge limiting precharge for the input power filter with a thermistor that when power is almost up and circuits are balanced the thermistor is shorted out by a relay so that the high currents can be handled... I suspect that the thermistor has gone bad... now that can be due to a short in the rectifier filter combination OR even a failure in the switching power supply or lastly, just a part failure of the thermistor. Using an isolation transformer, ALSO put a 100 watt incandescent lamp in serie with the power input cord to act as a resetable fuse and current limiter while working on this. Let me know how it goes...

Sep 12, 2011 | Yamaha STAGEPAS 300 PA System

1 Answer

Behringer XENYX 1620FX, won't power on. Phantom power works(?)

Here is a schematic close to your unit:

Scroll down to "get manual" and click to download. Ignore other download links.

The phantom power is a separate rectifier and regulator. See page 11 of the download service manual for the power supply. Be careful when working on line operated switching supplies. I suspect you will find one of the other supplies is dead. If the phantom is OK, then the switcher is working and one of the rectifier/filter/regulators is bad. Check if an electrolytic cap is shorted.

Jul 21, 2011 | Behringer Xenyx 1002fx Mixer 10 Input 2...

2 Answers

I've got a Adam A5X studio monitor. the problem is that fuse blows after about 15 sec. it works but you can hear background hum and the transformer gets very hot in 15 sec. then fuse blows. i wonder...

Transformers RARELY fail. It is likely that either one side of the amplifier has shorted or there is a failure in the rectifier/filter circuit of the power supply. Take it for repair unless you are adept at electronic repair. Do NOT continue to replace the fuse as you MAY cause futher damage. Use a 25 or 40 watt lamp in series with your power cord to limit current while troubleshooting.

Jul 05, 2011 | Adam Audio A5X Pair 2-way 5.5 inch...

1 Answer

Pro Junior III Guitar Amplifier - Hello,When I turn it on there is loud buzzing noise that does not change with volume.Thanks

There is likely one of three problems:

Blown rectifier in power supply.

Bad filter capacitor(s) in power supply.

Shorted power amp chip causing the riple on the power supply to reach the speaker.

Mar 13, 2011 | Fender R) Pro Junior III Guitar Amplifier...

1 Answer

Hello. I am a old tech, so struggle a little bit with this unit. It appears that the 12 volt power relay is not getting any signal, thus the 110 is not connected to the first set of power sections. It...

The relay shorts out two power resistors that limit the input power surge. The circuit is complex a bit. An off-line small switching power supply fires up and "heats up" the rest of the circuit for the main power switcher. I have repaired about four of these. Usually a failure due to arcing in the power amp section fries three transistors there and often a Zener diode. This then wipes out the main +/- 70 volt supply. The two IGBT's are usually blown including the four driver traansistors and the switching regulator chip and another small surface mounted transistor and one or both speedup surface mounted 1N4148's. IF THE fuse had been replaced to try again, often the two power resistors (sand coated ceramic) that ar 10 Watt either 10 or 20 ohms will be blown. Some of the hardest thing is to get the heatsinks loose with the IGBT's. When restarting the supply AFTER repair, one puts about 100 Watt lamp bulb in series with the 120 power input to act as a limiting fuse. You will NOT get far with this without a schematic. You can contact me by direct email fredy2 @

Oct 20, 2010 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

Do you know what regulator/ rectifiers are used and their numerical values so i can repair my fried pv 2600 these are the row along heat sink small black ones 2 pin and 3 pin cheers

7815 and 7915 plus and minus regulators specifically. Diodes fr the 15 supplies are 1N4001 but you can use 1N4007 or anything in between.

Big power rectifiers are 2504's... which are probably 25 amp 400 volt modules.

Jul 18, 2010 | Peavey Pv 2600 Power Amplifier

1 Answer

I have a KRK Rokit Powered 5 studio monitor and the fuse blew out, so i replace the fuse with the spare they provide and ''bam'' blows again as soon as i turn on the monitor. i have had these for about 4...

Look for a failure in the power supply section. You will need electronic experience or someone who has that.

If the fuse is glass and blows silvery inside thia means a direct short inside. SUSPECT the input rectifier or filter capacitor(s).

Do testing with a 100 watt light bulb in series with the hot side of the power cord to avoid blowing fuses.

Oct 10, 2009 | Music

2 Answers

Not working@ full pwr.I just got a new power supply I plugged it in the wall , in a short time the pwr supply got hot.. is there a way to reset it?

Sounds like you got an incorrect power supply OR the SR16 has a failure creating too much load.

The power supply should be a 9VAC at 1 amp (1000 ma)

The power supply MAY get warm to the touch but should not get real hot.

Without the SR16 pluged onto the power supply it should barely get warm. If the SR16 doesn't work, then it probably has an internal failure... LIKELY the internal rectifier filter combination.

Oct 09, 2009 | Alesis Sr 16 Stereo Drum Machine

Not finding what you are looking for?
Mackie HD1801 Powered Subwoofer (1600 Watts 1x18 in) Logo

272 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mackie Music Experts

Michial Gueffroy

Level 3 Expert

1138 Answers

Lawrence Nentwig
Lawrence Nentwig

Level 1 Expert

11 Answers


Level 3 Expert

5487 Answers

Are you a Mackie Music Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides