dcarver
Well-known member
StarComm audio amp has output impedance (Z) of 32 ohms.
Etymotic ER6 is 48 ohms (and are discontinued)
Etymotic ER6i is 16 ohms and caused amp thermal run away. and is also discontinued.
Replacement for ER6i is hf5 (my selection, like balanced armature sound over moving coil) and Z = 16 Ohms.
OK, no I'm off to find some way of matching these imbalanced impedances. From Wiki I find a circuit that looks promising and easy to build -
where Ra =
and Rb =
Given that
Z1 = 50 Ohms (stated that Z1 must be > of two Z's)
Z2 = 16 Ohms
I think I calculate correctly that
Rb = 19.4 Ohms
Ra = 41.2 Ohms
Does this look correct?
Is there a simpler solution?
Should I be using another technique e.g. circuit design type?
(Man, it's been a loooooong time since I played elec tech...
)
Thanks in Advance,
dcarver
Etymotic ER6 is 48 ohms (and are discontinued)
Etymotic ER6i is 16 ohms and caused amp thermal run away. and is also discontinued.
Replacement for ER6i is hf5 (my selection, like balanced armature sound over moving coil) and Z = 16 Ohms.
OK, no I'm off to find some way of matching these imbalanced impedances. From Wiki I find a circuit that looks promising and easy to build -
where Ra =
and Rb =
Given that
Z1 = 50 Ohms (stated that Z1 must be > of two Z's)
Z2 = 16 Ohms
I think I calculate correctly that
Rb = 19.4 Ohms
Ra = 41.2 Ohms
Does this look correct?
Is there a simpler solution?
Should I be using another technique e.g. circuit design type?
(Man, it's been a loooooong time since I played elec tech...
)Thanks in Advance,
dcarver
