Ivan TT
500+ Head-Fier
Yes, using se 3.5mm out.Is this with your mod?
Yes, using se 3.5mm out.Is this with your mod?
What a great idea, I never even considered it!running from my iPhone SE to the "Power Out", rather than "Line In" effectively bypasses the volume knob altogether
I've just received the F1 today and I want to offer up a few tidbits of info. Firstly the clarity and power is absolutely remarkable. Not having any previous Zishan or Walnut, i have no baseline for this. I'm floored. Secondly, the volume knob is sensitive, but maybe not as sensitive as some have reported. I have noticed that running from my iPhone SE to the "Power Out", rather than "Line In" effectively bypasses the volume knob altogether. With this setup, I can use the volume through my iPhone to control the volume of the F1. It provides far more than enough power to still drive my Zen 2 balanced, while I also dont have to worry about blowing out my earphones or eardrums. I dont know if this is effectively also a "low" gain setting, but it seems to be working that way. Another thing is that I'm able to use a 3.5mm to 2.5mm adapter to run absolutely any standard earphone via the balanced port. The adapter I'm using was included with my 3.5mm balanced VE Zen 2. Anyways, this thing is an absolute marvel. I don't know what the balance out is doing behind the scenes or what percentage of it may or may not be gimmicky, but the results vs. price ratio is truly sensational.
So, with this mod and Z2 the following configurations are available, they all give different sonic characteristics:I modded mine to feed balanced buffers into 3.5mm se out (in addition to 2.5mm balanced), only two headphone outs are soooooo last century!
hey, what value are those green nichicons?So, with this mod and Z2 the following configurations are available, they all give different sonic characteristics:
Z2 Line Out -> F1 op-amp -> 3.5mm out
Z2 Line Out -> F1 op-amp -> buffer amp -> 3.5mm (or 2.5mm balanced) out
Z2 opamp (PO) -> F1 buffer amp -> 3.5mm(or 2.5mm balanced) out
Z2 opamp (PO) -> F1 op-amp -> 3.5mm out
Z2 opamp (PO) -> F1 op-amp -> buffer amp -> 3.5mm(or 2.5mm balanced) out,
and also a VERY interesting one: Z2 Line Out -> buffer amp -> 3.5mm (or 2.5mm balanced) out, no opamps, no volume control.
I noticed that there's a bit of noise coming from buffer output, so I reduced F1's opamp gain by adding 12kOhm resistors in parallel in feedback loop, this matched the gain of Z2's amp and gave reasonable level when bypassing opamps using last option above.
With this mod I can use buffered output can to drive headphones using extra 3.5mm socket (F1 handles up to 64Ohm easily), this is not possible with 2.5mm balanced output unless headphones are modified for balanced operation.
Effectively I can choose opamp to match the music I'm listening to on the go (currently Burson v5i in Z2, LME49860NA in F1), add extra power if needed by tapping into buffers, or listen to DAC's output (LO) + gain provided by buffers.
It also gets a bit crowded inside of my F1
110uf (as opposed to 220uf in stock)hey, what value are those green nichicons?
What you are doing is tying negative left with negative right when they could be at different voltage reference levels. It doesn't seem like a good thing to do. I wonder if this is similar to a scenario when you bi-amp using two amps to drive the same load. I remember in circuit theory a little bit and I think there could be race condition. But if you say it works without problems then interesting.
Current flows from pos to neg terminal, and electrons flow opposite direction. Based on this one channel could be supplying the electrons to both channels and introduce crosstalk in theory.
I'd like to order the F1, please can anyone recommend a balanced silver cable for Rose Masya (2-Pin 0.75mm) earbuds?
I'm not a designer, not even related.
My understanding is that it's been designed to be used with high-impedance transducers, but not advertised as such. Why designers did not include gain switch is beyond me.
By the way, after putting in LME49720NA I'm in the Audiophile heaven, I have Muses02 in Z2 and muses absolutely pales in comparison, not even close.
So that comes back to my original question - is there something you did, which allows your LME49720NA to work in the F1, without audible noise?