"Arny Krueger" wrote in message
...
"Robert Morein" wrote in message


"Arny Krueger" wrote in message
...

"Steve" wrote in message


Hi, I am looking for an amp that can go with the Sennheiser 580
headphones that I recently ordered. I have been reading somewhere
that they need amps to work properly on cd players, computers, and
other equipment.

You can read all sorts of weird things. This story about 580's
needing headphone amps is probably based on the fact that their
impedance is about 10 times that of most other phones. IME, high
impedance or not, I plug them into standard headphone jacks all
over the place and just work.

I use them also.

They will probably work with most AC powered items.

Agreed.

They are definitely not sensitive enough for CD and Walkmans.

Robert, I can't deny you your perceptions in matters like this, but I'm
still scratching my head. When I hand people headphones I've been
listening
to, I either knock the volume down quite a bit or they complain about how
loud they are.

Arny, how do you manage to get enough output out of that RCA?

Turn down the volume, a fair amount. I was amazed at how loud it could
get.

Is it a 4 AA unit?

Nope, just 2 AA.

Now for something really strange, consider my Nomad 2: It runs on 1 AA.

I will admit that my NJB3 cranks pretty nice with the 5 volt Lithium cell,
but it doesn't get as loud as that crappy little RCA I was using to listen
to FM when the power was out.

I must have the most sensitive 580s ever made. I dunno, got 'em cheap &
factory sealed on eBay. But look at the list of phones I routinely use and
what I use them with. Seems like a lot of territory gets covered.

I think that the best strategy for Steve is for him to wait until he gets
the phones, listen to them for a while, and then take what he thinks is
the
appropriate action.

It's not inconceivable that later model 580's might have higher sensitivity.
A friend of mine and I mutually reached the conclusion that the Sony
MDR-V600 is a better choice for portable apps.
It has much higher sensitivity than our 580 samples, and a closed back,
which is useful if you're on a noisy train.