"Badbrain" wrote in message



Well for the budget I had I can't complain really. I usually end up
listening to music from my PC (mp3) these days and the Grado's with a
M-Audio 2496 are a million miles better than the Creative Audigy /
Plantronics rubbish I had before

How are you driving those Grados with that AP2496?

IME the AP2496 is not really designed to drive low impedance headphones like
Grados. It can work, but there might be some audible frequency response
variations due to the impedance curve of the headphones interacting with
relatively high output impedance of the AP2496. I'm not saying that the
output impedance of the AP2496 is high for a quality audio interface, I'm
saying its high for a headphone amplifier.

Arny Krueger wrote:

snip
How are you driving those Grados with that AP2496?


With a Creek OBH-21

IME the AP2496 is not really designed to drive low impedance headphones like
Grados. It can work, but there might be some audible frequency response
variations due to the impedance curve of the headphones interacting with
relatively high output impedance of the AP2496. I'm not saying that the
output impedance of the AP2496 is high for a quality audio interface, I'm
saying its high for a headphone amplifier.



Oh OK. Darn it. I only just bought this combo and can't really afford to
get something else. Thanks for the info anyway.

BB

"Badbrain" wrote in message

Arny Krueger wrote:

snip
How are you driving those Grados with that AP2496?


With a Creek OBH-21

IME the AP2496 is not really designed to drive low impedance
headphones like Grados. It can work, but there might be some audible
frequency response variations due to the impedance curve of the
headphones interacting with relatively high output impedance of the
AP2496. I'm not saying that the output impedance of the AP2496 is
high for a quality audio interface, I'm saying its high for a
headphone amplifier.

Oh OK. Darn it. I only just bought this combo and can't really afford
to get something else. Thanks for the info anyway.

Here's a short-tem, hig-quality low-cost solution:

http://www.pjbox.co.uk/Boostaroo.htm

I use one with a battery simulator composed of a 5 volt DC wall wart and a
couple of AA dummy batteries, made out of a couple of 1/2" dowels and a
couple of brass carpet tacks. Here are the exact dimensions:

http://data.energizer.com/datasheets...zer_e2/x91.pdf