[par4tom]

And here is my amp rack mock up with the 2 Zapco sl-z-400's and the 4 Zapco 1/3 Octave Eq's.

Why these amps and why so many 1/3 octaves?

Well, these amps were the best amps Zapco ever made in my opinion. These were manufactured in Modesto CA from about 1996 to 2000 and were the last of the Robert Zeff designs. They are extremely underated and are class A/B type amps. While not as efficient as a Class D amp of today, they are much faster and more musical than Class D amps because the outputs are tip 35/36 analog and not mosfets. Analog outputs much more expensive than mosfets, but they also use a lot of current. These two amps can pull up to 160 amps of current so I made sure to beef up my altenator. You can never have too much clean power in reserve!

Originally these amps were sold for about $1,600 each but since they are discontinued, I found them on ebay for about $250 bucks. Like all old amps, the capacitors inside start to dry out or leak when they have been stored for a long time. In fact, amps go bad faster from non-use than from use.

So, I sent them back to Zapco and had them rebuilt by my friend Mike Boronowski. My total cost in amps was about $900 but the performance in these things is downright scary. They make tons of power and are specifically designed for sound quality competition. Love these things and glad I could still find them.!

I am going to use one set of 1/3 octave eq's on the subs and another set on the mids and highs. This way, I can dial in a lot of mid-bass attack on the front sound stage and pull the sound stage more to the front of the truck without affecting the tuning on the subs.

The first picture shows the mock up. The second picture is where I covered the panel with trunk-liner material just to clean things up even though you won't be able to see it once I'm done with the trim plate around the amps and the neon lighting...

The third picture is where I am at as of today and fitting the middle jump seat to ensure clearance...Hope to get more work done next week but we'll see...I expect this project to take another 3 to 6 months...

T