Directed Electronics S e R e q u i r e m e n t s, S e T i n g For TD225A is 100 a m p s

To o l s / P a r t s N e e d e d f o r I n s t a l l a t i o n (not supplied)

Small flat blade screwdriver

Phillips screwdriver (#2 or medium sized) Wire cutters

Wire strippers

4 – #6 round head screws, and 1 – #8 sheet metal screw (or nut, bolt, and star washer)

2 – Ring connectors (large enough to accommodate your method of grounding) In-line fuse or circuit breaker — see fuse requirements below

Power and groundwire — see Power Wire Calculator on the next page Speaker wire — 16 gauge or larger

Grommets (sized to work with the power wire you plan to use in your installa- tion)

Tube of silicone sealant

F u s e R e q u i r e m e n t s

R e c o m m e n d e d	F u s e	R a t i n g	for TD2200 i s 100 A m p s
R e c o m m e n d e d	F u s e	R a t i n g	for TD225A is 100 A m p s

You will need to install an in-line fuse or circuit breaker in the power wire within 18” of the battery. This fuse or circuit breaker protects your vehicle from fire in case the power wire shorts to the vehicle body. If you are only using one amplifier, use the recommended fuse rating. If you are using more than one amplifier, add up the fuse ratings for all amplifiers, and use this sum for your main fuse or circuit breaker. Use a power distribution block or fuse near your amplifiers with the appropriate fuse for each individual power wire.

The information below is a basic formula you can use to determine approximate current draw. A 50% amplifier efficiency rating is used as an average. This formula is only a guideline. Using wire of a larger gauge can only improve the current transfer of your system. Do not use smaller gauge wire.

Total 4-Ohm rated RMS output x 2 = Total Input Wattage

Total Input Wattage/Supply Voltage = Current Draw (in Amps)

Example: A TD275 has 2 channels at 75 watts per channel RMS into 4-Ohms

(75 x2 =150). You would use the formula below:

150W x 2 = 300W/12.5V = 24 Amps Total Current Draw

2

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