Question about Pyramid PB448 Car Audio Amplifier

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I need to know the value of the fuse for the pyramid pb448

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Should be a 30 A fuse. Here's the manual
Pyramid PB448x User Manual

Posted on Nov 28, 2008

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Volume of triangular pyramid


Here is to get you started. To increase the size of the image do a CTRL Plus (+) in your browser.
You need to calculate the slant height of the pyramid for the formula of the lateral area. You should find a value of (1/2)*SQRT(203) or about 7.1239 cm

913b74c4-c453-4afa-be3a-c3e781816e8d.png

You need to calculate the altitude (height) of the pyramid from the apex (summit) to the center of the base triangle (center of inscribed circle, barycenter, orthocenter). The hypotenuse of such triangle is the slant height. One leg is the altitude (to be found), the measure of the second leg is (1/3) the altitude of the equilateral triangle that forms the base. You should find (1/3) m MH= (1/3)* (11/2)*SQRT(3)
bc7a3bcd-ec6e-4936-9887-c6372904fe9f.png

1. Calculate the area of the base (use a formula for the equilateral triangle or the general formula for a triangle: you have its height MH ).
2. Lateral area = 3 times the area of triangle Triangle ECD (in yellow above).
3. Total area = area of base + lateral area.
4. Volume= (1/3)(Area of base)* (height of pyramid)
If you can see the details on the screen capture below, fine, Press CTRL + in your browser to increase the size.
1fbf065d-6c1d-440a-9069-783127aa9842.png

Mar 29, 2014 | Office Equipment & Supplies

1 Answer

I have a Pyramid PS-52kx. I need to know the value of R13 on the controller board, and cross-reference for TYN416


I HAVE A PYRAMID PS-52KX I NEED TO KNOW THE R13 RESISTOR OHMS AN TOLARENCE AND WATT.

Mar 07, 2011 | Pyramid PS52K Amplifier

1 Answer

What is the value of the resistor that burns up when to much RF power is input?


Hi wrightjc2,
Most common burned resistor are those with low resistance because it acts like a fuse to avoid further damaged to some parts if shorts,overload happened. But still best to have a schematic diagram to identify the burned one. If you haven't a schematic you may get the resistance of the resistor, measure it to the middle where the burned cut out, add the resistance from one half side to other half side. You may now have an Idea what may be the value of the burned resistor.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Feb 25, 2011 | Pyramid (Swr14) Swr&Power Field Strength...

1 Answer

Bought a car and this amp was in it(Pyramid Crystal PB781X 2ch MOSFET). it is missing the fuse. what fuse does it require?


25 to 30 amp fuses are the most commonly used fuses in any amp and since yours is a 1000w amp, I would use the 30a.

Sep 05, 2010 | Pyramid 2CH 1000W CRYSTAL AMP Car Audio...

1 Answer

Pyramid ps-36kx


Generally, the fuse only blows when the rectifiers fail. In other Pyramid supplies, they use a square, 4 terminal bridge rectifier. They probably use the same thing in your supply.

Let me know if you have any other questions.

Nov 15, 2008 | Pyramid - PS21KX 20 Amp Power Supply Car...

1 Answer

Nobs and switches


I couldn't find any online information. I checked with pyramid. This was their response:

The owners manual is free of charge please send us a request along with a self addressed stamped envelope to the address below:
Pyramid Service Center
1600 63rd Street
Brooklyn, NY 11204

Nov 04, 2007 | Pyramid PB448 Car Audio Amplifier

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