[SennheiserTech]

Just to add some background: An HD 660S2 with the HD 650 capsules will sound exactly like an HD 650, since the earpads and the baffle (metal mesh part around the driver) is exactly the same. The same applies vice versa.
You can get a different result by implanting HD 660S2 drivers into the HD 600, since the baffle has less acoustic impedance and you lose some amplitude below 1kHz, which makes the upper mids more forward and less "mellow".
That being said, I don't endorse taking your headphones apart ;^

Not sure about the other fella, but I took a driver from 580 and transplanted into new shell so I can have

I) increased clamp
Ii) new cable


As much as I love 580 it was too loose and the sound was better with tighter clamp. And the old cable is not that good.

I've heard 660s2 and there is no need at all to touch it.

660s is different story

It's somewhat pointless. Yet there are one or two cases where it might make sense for someone who has multiple sets

That makes sense as some people are very fond of the HD580 voicing and headband assemblies are long extinct.

 

[SHAMuuu]

Just to add some background: An HD 660S2 with the HD 650 capsules will sound exactly like an HD 650, since the earpads and the baffle (metal mesh part around the driver) is exactly the same. The same applies vice versa.
You can get a different result by implanting HD 660S2 drivers into the HD 600, since the baffle has less acoustic impedance and you lose some amplitude below 1kHz, which makes the upper mids more forward and less "mellow".
That being said, I don't endorse taking your headphones apart ;^)

Jermo. Our new hero. Please recreate baby Orpheus.

Thank you

 

[457139]

Managed to come across a 600 w black silk capsules. Going to try these with my 660S2 now lol

 

[blochsidisco]

As an HD600 owner, I was always told the 600s and 650s are more similar than different.

Well, recently the S2s have been my daily drivers. Just the other day I got a really good offer on the 650s that I jumped on. And… I’m having trouble telling those two headphones apart. They are practically identical to my ears. The 650s may be a bit more sharp in the upper mids but that is it. What gives? May be because of what Jermo just explained. Or perhaps I got one of equalspeace’s modded units it was b-stock

The 600s on the other hand are definitely the odd one out between the three. Admittedly the pads are more worn.

 

[kman1211]

As an HD600 owner, I was always told the 600s and 650s are more similar than different.

Well, recently the S2s have been my daily drivers. Just the other day I got a really good offer on the 650s that I jumped on. And… I’m having trouble telling those two headphones apart. They are practically identical to my ears. The 650s may be a bit more sharp in the upper mids but that is it. What gives? May be because of what Jermo just explained. Or perhaps I got one of equalspeace’s modded units it was b-stock

The 600s on the other hand are definitely the odd one out between the three. Admittedly the pads are more worn.

The HD 660S2 is honestly a modern take on the HD 650. Biggest differences is the upper mids and the bass to my ears. Multiple less obvious differences will become apparent as you listen more. The HD 600 on the other hand is a different animal altogether. The HD 660S1 is also quite different.

 

[blochsidisco]

The HD 660S2 is honestly a modern take on the HD 650. Biggest differences is the upper mids and the bass to my ears. Multiple less obvious differences will become apparent as you listen more. The HD 600 on the other hand is a different animal altogether. The HD 660S1 is also quite different.

Sounds good. Nevertheless, the S2s and 650s are on my desk, and the 600s are in the drawer.

 

[SennheiserTech]

As an HD600 owner, I was always told the 600s and 650s are more similar than different.

Well, recently the S2s have been my daily drivers. Just the other day I got a really good offer on the 650s that I jumped on. And… I’m having trouble telling those two headphones apart. They are practically identical to my ears. The 650s may be a bit more sharp in the upper mids but that is it. What gives? May be because of what Jermo just explained. Or perhaps I got one of equalspeace’s modded units it was b-stock

The 600s on the other hand are definitely the odd one out between the three. Admittedly the pads are more worn.

Pads will affect things but the feelings about how vary. There are those that will argue that worn pads actually sound better. Back on topic, The S2's are similarly voiced with some subtle, but significant differences. While at first glance you might find the bass to be similar, my experience is that the 650 has a bit of a mid bass boost before starting to roll off when compared to the 600 as a benchmark. This gives them what is definitely a warmer sound. The S2 by contrast does not have as much hype in the mid bass but goes down deeper before rolling off. I personally find the S2 to be more "true" to my ears.

 

[457139]

660S2 w black silk capsule and grills from a 600, as well as other 6 series parts present.

660S2 as it is currently sounds unreal
Many thanks to Jermo for the rec.

 

[SHAMuuu]

660S2 w black silk capsule and grills from a 600, as well as other 6 series parts present.

660S2 as it is currently sounds unreal
Many thanks to Jermo for the rec.

What exactly was the recommendation? To use the black silk?

Did the grill swap change anything or merely for more subtle aesthetics?

 

[457139]

What exactly was the recommendation? To use the black silk?

Did the grill swap change anything or merely for more subtle aesthetics?

To use the 600 capsule instead of the 650. He said the 650 capsule or baffle as he put it, would provide no benefit, as the 650 and 600S2 capsules are the same. He then rec'd using the 600 capsule, as they are different.

I took it a step further and used an old black silk 600 capsule as opposed to the current one.

See post #6717

Re the grills, my thought is that each one (660S2, 600, 650) have their own slight impact on the sound. I may be wrong about that and imaging what I'm hearing again. If someone from Senn wants to provide input into this I would luv to have this info

 

[Rob80b]

as the 650 and 600S2 capsules are the same.

Sorry..Just trolling in here but the drivers for these two besides being decades apart are relatively quite different.....

Back on topic, The S2's are similarly voiced with some subtle, but significant differences.

 

[457139]

Just trolling in here but the drivers for these two besides being decades apart are relatively quite different.....

Was referring to the capsule or baffle that houses the drivers. See post #6723 for this pictured..

I am continually surprised at the amount of people with a lot of experience in the hobby that do not understand how these 6 series headphones work.

 

[Rob80b]

Was referring to the capsule or baffle that houses the drivers. See post #6723 for this pictured.

Gotcha, usually the capsule is referring to the driver when mentioning the 600 series.

Just to add some background: An HD 660S2 with the HD 650 capsules will sound exactly like an HD 650, since the earpads and the baffle (metal mesh part around the driver) is exactly the same. The same applies vice versa.

Baffle and capsule/driver.

 

[457139]

Gotcha, usually the capsule is referring to the driver when mentioning the 600 series.


Baffle and capsule/driver.

Ah ok. This is has been confusing for me in the past since aftermarket sites list the baffle and driver as a capsule. I guess they are just referring to the driver when they do that. Thanks!

 

[Rob80b]

Ah ok. This is has been confusing for me in the past since aftermarket sites list the baffle and driver as a capsule. I guess they are just referring to the driver when they do that. Thanks!

It can be especially with units that can be completely disassembled and repaired with parts by the end user, but the baffle is always the surrounding area around the driver, in this case the "capsule". : )