Rane Wheelchair TF 410 产品宣传页

MA 3 TRANSFORMER KITS

Up to three optional 70.7 V or 100 V constant-voltage distribution transformers may be 

mounted inside the MA 3 with no external wiring or mounting required.

• The TF 407 is a 40W, 70.7 V transformer with 0.5 dB insertion loss at rated power and a frequen-

cy response of 50 Hz to 15 kHz, ±1 dB.

• The TF 410 is a 40W, 100 V transformer with 0.5 dB insertion loss at rated power and a frequen-

cy response of 50 Hz to 15 kHz, ±1 dB.

1. Unplug the MA 3 amplifier!

2. Remove the top cover (12 screws).

3. Capacitors C63, C61, C62 and C65 need to be laid toward the rear of the unit (Figure 1). Don’t 

press on parts, just gently lay them over.

4. Stand the MA 3 up on one end with the power transformer toward the bench (Figure 2).

5. Locate the transformer mounting holes along the rear panel of the MA 3 (Figure 2).

6. Place one of the two supplied #8 screws in the “top” mounting hole of the pair of holes associated 

with the channel receiving the transformer (Figure 2). 

 

The “bottom” two holes are for Channel 3. 

 

The “center” two holes are for Channel 2. 

 

The “top” two holes are for Channel 1.

7. With the transformer primary (WHT & BLK) wires facing the PCB, “hang” the transformer on 

the #8 screw and nylock nut. Hold the screw and transformer in place with one hand. Use your 

other hand to rotate the supplied #8 nut onto the threads. Use a nut driver and #2 Phillips driver 

to snug the hardware. Install the second #8 screw and nylock nut. Make sure hardware is tight.

8. Repeat for additional Channels if more than one transformer is required. When installing more 

than one, start at the bottom (Channel 3).

Figure 2. Transformer mounting 

holes for each channel.

Gently lay capacitors back toward the rear

Ch 1      Ch 2       Ch 3

Figure 1. Capacitor clearance