FiiO E9 Review - Page 8

Yes, this is great! We only have one thing to possibly complain about FiiO: make enough of them (don't let them get sold out), and hurry up with that 2nd batch:)
 

I really need to add this to my xmas wish list <333

Thanks, just the answer I was hoping for, will be ordering the combo tonight from PJBox :)

 

I'm definately interested in taking out the OPA2134 though. I'm assuming there will be limitations to what we can replace it with though. My favourite OpAmps are OPA2111AM (which should be fine) AD797 and OPA637 both of which are not normally drop in replacements.
 

I'm really impressed with Fiio support. I'm greatful that James is responding to our questions.

I especially thank you for showing me the E9 schematic diagram.

I studied electrical engineering and hand designed and hand built effecient H-Bridge amplifiers. They were not audio quality, but rather efficient amplifiers.

 

Question: why is there a 33 Ohm resistor between the electric relay and the 3.5 headphone plug. And there is no such resistor between the electric relay and the 6.5 plug?

For IEMs. Otherwise you risk blowing them out... along with your hearing.

I'm really feelin my new little setup I got here. Loving the bass boost on the solo E7, and the power coming through the combo is superb thus far. My xb700 are rumbling in the jungle. Unfortunately my cool but nonetheless stevejobified crapple product produces an annoying hiss mostly from the right earcup. But when these cans are booming its easily drowned out. Overall I'm extremely happy with what I've got here.

 

Got it. I'll be using K702's so I'll make sure to use the 6.5 mm port. I've heard that the 3.5mm had a wobbly connection. Is this true, or was this only true on a prototype unit?

 

Additionally, does the E9 use the E7's DAC, requiring the E7 to be plugged in in order to use USB audio?

My 3.5mm jack is fine; I think I remember hearing the same thing. It was probably just a problem for one person.

 

And yes, the E7 must be docked to get USB audio, as the E7's only function is a DAC in that mode.

Riku540, I read that you're on your second unit because of the E9/E7 connection. How's your second unit?

 

James, if I want to use the Bass Boost of the E7, and I plug in the E7 to the 3.5 input, what volume should the E7 be set to so that it can act as a "line out"

 

Micca suggested:

 

 

 

Would you suggest this too? Is 56 too high? I was thinking 10 / 60

Edited by Oddworld - 11/12/10 at 9:11am

Perfect! Couldn't be happier!

 

I was definitely upset with the first one, though I have not heard of anyone else having the same issue. Thankfully I received a new one only 2 days later, with free expedited shipping.

Nothing to worry about since I know you are eagerly waiting your E9.

Edited by Riku540 - 11/12/10 at 9:12am

I also have a pair of Sony mdr xb700 and I love the sound they produce. I not needing bass boost. My denon ah c751 sound wow too. I have been running the amp in for nearly 10 hours. Plenty of bass too.

I connected my MacBook to use the e7 dac and really enjoyed the extra clarity. The way I can describe the e9 is it brings your headphones to life.

I'm rediscovering my music again.

Guys, I have a little question here: I own a pair of AD700's, as many of you know, it's standard plug is a 3.5mm but they come with an adapter for the bigger plug (sorry, forgot the diameter size..). My question is: should I use them (on the Fiio E9) directly on the 3.5mm headphone jack or should I use the adapter and plug into the bigger one?

I have the same question for AKG K702's big plug or small plug?

Big one. The 3.5mm has a much lower volume for extremely sensitive phones like IEMs. -90db to be exact.

We inspected Riku's return unit and found that the E7 was the cause of the issue. The E9 unit was fine, however.

 

When you use the E7's headphone output to feed the E9, you want as high an output from the E7 as possible for best signal quality. 56 is unity gain from the built in E7 amp chip. I think anything between 56 to 60 should be fine. 

 

Jack