Rogue Audio Stereo 90 Manuale Utente

 

3

 

Figure 1 Tube and Deck Layout 

 
Connecting the Stereo 90 to the Loudspeakers: 
The Stereo 90 provides options for either 4 or 8 ohm speakers. The impedance 
selected will depend on the speakers used. Consult either the owner’s manual for 
your speaker or your local dealer to determine the correct choice. The amplifier is 
factory set to 8 ohm.  
 
To switch impedance setting: 
1)  Using a ½” wrench remove the outermost nut from the positive (red) binding 

post.  

2)  Remove the 8 ohm tap (green wire marked 8) from the binding post. Be 

careful to leave the black wire with heat shrink on the post.  

3)  Remove the polyurethane tubing from the unused 4 ohm wire (yellow) and 

lug.  

4)  Place the 4 ohm wire onto the binding post and replace the outer nut.  
5)  Place the polyurethane tubing on the 8 ohm wire and lug.  
 

Left Binding Post 

Right Binding Post 

Bias Meter 

Rotary Bias 
Switch

Potentiometers 
 

V1 

V2

V4

V3

12AX7 

6SN7 

Bias Tool