- Nov 24, 2011
- Reaction score
- Kuala Lumpur, Malaysia
Thanks for sharing your thoughts, @WiR3D! And @moedawg140!
But I still think it would be interesting to conduct an experiment to see how impedance adapters of specific ratings affect the frequency response of a given IEM, as @nmatheis is planning to do. If enough useful data becomes available, we might be able to do some impedance-adapter-rolling, as it were. Might be fun :-D
Thanks for sharing your thoughts, @WiR3D
! And @moedawg140!
But I still think it would be interesting to conduct an experiment to see how impedance adapters of specific ratings affect the frequency response of a given IEM, as @nmatheis
is planning to do. If enough useful data becomes available, we might be able to do some impedance-adapter-rolling, as it were. Might be fun :-D
Just to clear up a little potential confusion here- you do not want to add impedance (like an impedance adapter) in front of multi-BA iems if your goal is to remove hiss. Adding impedance will cause a frequency response variance based on the particular iem's impedance curve. This may or may not be pleasing but it is certainly a deviation from the intended frequency response of the designer. Once you've you seen an impedance graph of a particular iem, you could potentially add impedance to change or fix issues you find with the stock performance. But in general this is not something you are probably intending to do.
A buffer is something entirely different. The UE Buffer Jack isn't really a buffer in the strictest definition but probably more likely a less advanced voltage splitter. I don't really understand how voltage splitters work but it involves more than the one resistor of an impedance adapter and attempts to split the difference of the input and output, so that the damping factor is doubled as a result. A true unity gain buffer, like the UE Pro Line Drive utilizes an opamp to front load higher impedance at the input but lower impedance at the output (headphone out), without increasing gain (thus unity gain), and is a more effective way of reducing hiss, noise and impedance. That being said, the UE Buffer Jack is pretty inexpensive and small, and worth a try for anyone experiencing a bit too much hiss.
I think listing the sources/amps that don't hiss versus those that do is a good idea, like mentioned above, for potential and new buyers. I'll add that the Picollo amp from Cypher Labs, less than 1 ohm output impedance, doesn't hiss with anything. It's veritable black hole. I didn't notice any hiss with the iPhone 6S+ either, which is supposedly around 3.3 ohm output impedance.
shotgunshane - Regardless of a buffer jack/impedance adapter or anything in between, it is most definitely deviating somewhat to a lot (based on the listener's perception) of the intended frequency response of the IEM designer.
Adding the sources that I mentioned are great for any user, regardless if they are potential or new buyers, since everyone can benefit with knowing which sources are very good to use to inherently eliminate hiss - including the amp and smartphone that you listed above.
I actually have all three of those ingredients with me now. But honestly, the veritas show fairly "meh" results and I dont really want to most graphs that arent completely accurate.
Maybe i'll get to playing around with them later in the week.