Hello. I'm missing the bottm plate of the mackie 1604 vlz pro. I bought it on ebay and the bottom plate that covers the internal parts did not come with it. Is there anything I can do about this? Do they sell just a bottom piece?

The LEAST expensive thing to do is to buy an external stepdown transformer.
Here is a link:

http://www.world-import.com/transformers.htm

The 100 Watt would be adequate... If you think you might need more you could have a reserve for other equipment... At around $8 USD I don't think you can beat that. The labor cost to change the internal transformer would cost many times what the external transformer costs, not to mention the cost on a new internal transformer.

You should be able to get this directly from Mackie service. Please see the link below for the contact information. Please note that the exact model number adn serial number will be required to insure that the correct transformer is obtained. There are a few variants of the 1604,

Dan

Link: http://www.mackie.com/support/service/index.html

The best way is to use a two-way crossover between the mixer and the amplifiers. In your case, the low output from teh crossover would go to the powered subs, the highs to the QSC. Use the crossover adjustment to set the frequency crossover point to get the sound quality you require.

Dan

Mackie 1604 ---> Crossover --- Highs ---> QSC --->Speakers
'
-----> Crossover --- Lows ---> Powered Subs.

The manual can be downloaded from the link below.

Dan

Link: http://www.mackie.com/pdf/archive/cr1604_om.pdf

If you havent ground looped the chanels. Most of the time the chanels need to be cleaned.

get in contact with this company, i am sure they can help you

http://www.mackie.com/products/1604vlz3/

Removing all the knobs from a section of the board where the bad fader is can be a hassle.and sometimes some of the nuts from jack or screws from some connectors.

You are probably better to order the part from Mackie to get the exact part. Most are made by ALPS and I get ones for some equipment from DigiKey.com or Mouser.com. However, it does take a bot o knowledge to get the correct part and sometimes requires cutting the shaft of one that is too long.
One MUST match the mounting holes, resistance value, length of throw AND the "taper". Yours will probably be a standard "Audio taper" for the main output.

A local hardware store with drawers of screws should have what you need. The screws may be metric.

Take a sample screw with and find a nut to fit it to get the size and thread pitch. Then select a screw of that size of an appropriate length..

Nothing is worse than getting something that has obviously been worked on... you know it has a problem that they tried to fix and if you are lucky, they did not create others.

Many of those connections REQUIRE using TRS cables (stereo style) rather than TS cables (mono style). It is possible you have mixed the cables if it worked before.

Any cable plugged into an "insert" should be a TRS (tip-ring-sleeve) cable.

Look up these connections in your 1604 manual.

I need it as well ... [email protected] ... NOT the VLZ the original