Matching 16 ohm loudspeaker into 8 ohm output transformer: can i do any modification?

[ygg-it]

Hello I have the following EL34 SE schema but I have a 16 ohm loudspeaker to be connected to the 8 ohm output.

Should I be worried about this?

Can I do any modification to the circuit in order to better match the impedance?

I cannot change of course the transformer, so i was thinking to add or change any resistor.

Any idea?

(I already put a 16 ohm resistor in parallel to the loudspeaker but I don't like the sonic outcome...)

 

[azazello]

Why not use sp. 16 ohm to 8 ohm output? Bass will better and distortions - min.
Or change EL 34 to KT66, 6F6....
What is Load /kohm/of Your output trans?

 

[JMFahey]

If you have no other option, use the 16 ohm speaker in the 8 ohm tap.

It's *just* within what a tube will accept as mismatched load.

But don't put it, say, in the 4 ohms tap, that will be too far away.

 

[ygg-it]

Why not use sp. 16 ohm to 8 ohm output? Bass will better and distortions - min.
Or change EL 34 to KT66, 6F6....
What is Load /kohm/of Your output trans?

Unfortunately i don't know anything about the trafo unless the scheme.

Which is the difference using the KT66 or 6F6 in place of EL34??

 

[DF96]

Connecting a 16R speaker to an 8R tap means you will get a bit less power and a bit less distortion. You probably won't notice. No need to do anything else. Connecting a 16R in parallel won't help - it just guarantees half the power and the same distortion as an 8R speaker would get.

 

[nl3prc]

example when in normal use the transformer 4Kohm on the prim. side and 8 ohm on the speaker side

When you put a speaker of 16 ohm on the 8 ohm tap your prim. wil be 8Kohm ( RA )

this is not a problem for as far i can see

 

[azazello]

KT 66 and 6F6 have more Ri and this corresponds to increasing of R load of your OT, if you connect 16 ohm to 8 ohm output.