[BenF]

Thanks for the analysis. As an owner, I never know these specs but simply thought it’s “good”.

If it sounds good, that's all that matters

When you say “flat”, do you mean the amp doesn’t change the sound signature of the headphone but “amplifying” it?

I mean that it won't affect the headphone's frequency response by either increasing or decreasing quantity of sound pressure across the spectrum.
However, an amp may still affect the quality of sound - you may have two amps that will produce the same amount of bass on the same headphones, but one will have great texture and the other one will be muddy - frequency response doesn't show that.
Also different amps may make the notes sound thinner or thicker.
All these amps won't affect the extreme V-shape FR of TH900, but they may introduce significant differences nonetheless.

For machine like Naim Uniti (all in one), some says its sound signature is “coloured”, similar to p1u. I guess they are not “flat”, or are they?

You can't really measure FR of an all-in-one (DAC/Amp), a transfer function can only be calculated when both output and input are analog.
However, it may still affect the sound in the same ways as I described above.

By the way, 750u can also drive high impedance but do you reckon it’s good enough for something like hd800 or even hifiman?

It has enough power to drive almost any headphone on Earth, especially through the balanced output:

However, HD800 is very sensitive to amps, you shouldn't buy it before listening to it on your sound chain.

 

[HorstHansen]

Can someone help? Does the mk2 in red sound different from the mk1 and does the mk2 sound different from the mk2 in other colors?

Also are there any pads that help with isolation and leakage without drastically increasing the bass? Thanks.

MKII in blue and white are a little more balanced then the red ones, meaning they have less aggresive highs and more controlled bass than the red ones. Red and green are the same! Can't say anything bout the MKI's though...

 

[jmills8]

MKII in blue and white are a little more balanced then the red ones, meaning they have less aggresive highs and more controlled bass than the red ones. Red and green are the same! Can't say anything bout the MKI's though...

Red version for the car

 

[iFi audio]

I only bought the MKI and MKII , and they sound the same.

Just to clarify, so the cable is the only difference? I've heard only the MKII version.

 

[Malevolent]

Just to clarify, so the cable is the only difference? I've heard only the MKII version.

Yes, I've heard the 2 models - the Red Mk1 and Red Mk2 - and they sound identical. The only difference is the inclusion of detachable cable sockets on the Mk2.

Speaking of the sockets, I wonder why they didn't go for something a little more elegant, or more universal?

 

[iFi audio]

Yes, I've heard the 2 models - the Red Mk1 and Red Mk2 - and they sound identical. The only difference is the inclusion of detachable cable sockets on the Mk2.

Though so, thanks!

Speaking of the sockets, I wonder why they didn't go for something a little more elegant, or more universal?

Just took a look and isn't it the same as found in i.e. Senns HD 600? But yes, these sockets protrude quite a bit and recessing them would look more sleek.

 

[Malevolent]

Just took a look and isn't it the same as found in i.e. Senns HD 600? But yes, these sockets protrude quite a bit and recessing them would look more sleek.

Indeed, Fostex uses HD600-esque pins; however, if I am not mistaken, the connector is a little recessed. Hence, you can't simply use your HD600/650 cable(s) with the TH900 Mk2. Do correct me, if I am wrong.

But, yeah, what I'd like to see in a Mk3 is the adoption of a more-common connection method, such as dual 2.5 or 3.5mm sockets.

 

[Bonddam]

There is no room for another connection type. Also these are more durable as the plastic part inserts into headphone connector.

 

[iFi audio]

Indeed, Fostex uses HD600-esque pins; however, if I am not mistaken, the connector is a little recessed. Hence, you can't simply use your HD600/650 cable(s) with the TH900 Mk2. Do correct me, if I am wrong.

Now I remember, in case of HD600 plugs a bit of plastic around pins needs to be removed and then these go in nicely into TH900 MK2's sockets.

There is no room for another connection type. Also these are more durable as the plastic part inserts into headphone connector.

A connection standard would make it a bit easier for enthusiasts, but then again headphone manufacturers have their own reasons why they use their connectors of choice.

 

[waveSounds]

Senn connectors can be used but aren't recommended. Their polarity is reversed compared to the pins of the Fostex so you'd need to shove the big pin in the small hole and vice versa.

 

[iFi audio]

Senn connectors can be used but aren't recommended. Their polarity is reversed compared to the pins of the Fostex so you'd need to shove the big pin in the small hole and vice versa.

You're right, now I remeber that those pins slightly differ in diameter and reversed polarity also applies. Thanks!

 

[jmills8]

Just to clarify, so the cable is the only difference? I've heard only the MKII version.

Yes

 

[tombrisbane]

Looks like mine should arrive tomorrow (no balanced cable yet as this is on back order) - can’t wait!

For replacement pads, which Dekoni’s are closest to stock? I always like to have a backup

 

[HorstHansen]

Red version for the car

 

[tombrisbane]

They arrived - cups look amazing in person! Given them my first listen now and they’re surpassing what I was expecting, thought I may have over hyped myself but apparently not. I chose Sunsets by The XX for my first track and just wow

I’ve still got four days off work so will be a fun time between these and the Grado RS-1x/2x!