Gain into 4 ohm?

[Adrian]

The product page says the gain is 8 into an 8 ohm load.
I assume this is with the output transformers connected for 8 ohms.

What would be the approximate gain if the outputs are connected for 4 ohms feeding 4 ohm speakers?

 

[Paul Joppa]

The voltage gain would be about 0.7 times 8, or 5.6 - 0.7 being about the square root of 1/2.

 

[Adrian]

Got it:
assume power (watts) constant with v_1=8; R_1=8; R_2=4
w=v^2/R.
(V_1^2)/R_1 =(V_2^2)/R_2
v_2=v_1 √(R_2/R_1 )
v_2=8√(4/8)=5.66

(I think?)

 

[Rocketman248]

....I understood some of those words. 

 

[Paul Joppa]

Got it:
assume power (watts) constant with v_1=8; R_1=8; R_2=4
w=v^2/R.
(V_1^2)/R_1 =(V_2^2)/R_2
v_2=v_1 √(R_2/R_1 )
v_2=8√(4/8)=5.66

(I think?)

Looks like you got it!