[PeteMtl]

You could try to put your HD700 drivers into your HF650 frame....

What you are describing is more or less (a lot more than less by the way) the HD660S: a HD700 driver in a HD650 frame paint in mat black...

 

[Deftone]

You really think it’s just a hd700 driver jammed in a HD6X0 frame?

No modifications, no driver tuning, no careful testing at all?

 

[Sigmaaa]

Are the crazy peaks only due to the enclosure?

HD700 are ok as long as the music doesn't have substantial sound in the 6-7kHz area, otherwise it becomes a nightmare.

 

[kman1211]

You really think it’s just a hd700 driver jammed in a HD6X0 frame?

No modifications, no driver tuning, no careful testing at all?

I believe Sennheiser said they are tuned differently, even though the housing likely makes the biggest difference I wouldn’t be surprised if they are tuned differently. The HD 600 and HD 650 drivers are tuned differently from each other in my experience. Just because a driver looks exactly the same doesn’t mean they sound the same. Sennheiser makes their own drivers so they can tune them how they wish.

 

[kman1211]

Are the crazy peaks only due to the enclosure?

HD700 are ok as long as the music doesn't have substantial sound in the 6-7kHz area, otherwise it becomes a nightmare.

I gathered they are actually caused by the pads based on people who modded the HD 700.

 

[pietcux]

You really think it’s just a hd700 driver jammed in a HD6X0 frame?

No modifications, no driver tuning, no careful testing at all?

Honestly, there is a decent modification, they now use black plastic without paint. But it sounds superp, so what. The driver finally found it's proper home.

 

[pietcux]

What you are describing is more or less (a lot more than less by the way) the HD660S: a HD700 driver in a HD650 frame paint in mat black...

Ayes Sir that what I mean..

 

[Deftone]

So by that logic (if) you could magicily fit the huge HD800 driver it in the HD6X0 frame it would sound just like a 600 series

There we go HD680

 

[SonyFan121]

I once transplanted HD700 drivers in a Beyer T5P I had that became faulty.
Soundstage was massive, the only problem was it sounded far too thin/bright, no matter how much I tried to tune it I couldn't get the bass to show.
Soundstage was something special though.

 

[Law87]

You really think it’s just a hd700 driver jammed in a HD6X0 frame?

No modifications, no driver tuning, no careful testing at all?

its HD700 drivers but I'm sure they did something to tame that treb...just like HD800 and HD800s. I dont think Sennheiser would ditch the HD700 drivers, sales were too low and R&D cost were too much. They probably did not recoupe from HD700 sales to justify ditching the project.

 

[nicholars]

Has anyone actually conclusively said it is the HD700 driver? What I read Sennheiser say is that it is "based on" the HD700 driver. So that is not necessarily just plonking the HD700 driver in HD650.

 

[DavidA]

its HD700 drivers but I'm sure they did something to tame that treb...just like HD800 and HD800s. I dont think Sennheiser would ditch the HD700 drivers, sales were too low and R&D cost were too much. They probably did not recoupe from HD700 sales to justify ditching the project.[/QUOTE

After reading your post I asked my friend to bring over his HD660S and we took out one of the drivers from them and one from my HD700 and they don't sound the same outside of any housing so I'm pretty confident that the drivers in the HD660S is not the same as those in the HD700. Granted all we did was hold them next to our ears connected to the same source, not very scientific but it was easy to notice that they don't sound the same, but also weird without any housing.

 

[Law87]

After reading your post I asked my friend to bring over his HD660S and we took out one of the drivers from them and one from my HD700 and they don't sound the same outside of any housing so I'm pretty confident that the drivers in the HD660S is not the same as those in the HD700. Granted all we did was hold them next to our ears connected to the same source, not very scientific but it was easy to notice that they don't sound the same, but also weird without any housing.

I am assuming you meant "look" instead of "sound"

anyway, thanks for clarifying, not sure what Sennheiser was saying when they said "based on HD700", maybe its just a marketing tactic. Its also interesting to note that many, consider the HD660s are neutral to brighter than HD650s so maybe thats where the similarity was reference. Either way glad we clear that up. I am still standing by what I said regarding two same drivers can sound totally different, as in the case of HD800 vs HD800s.

 

[pietcux]

After reading your post I asked my friend to bring over his HD660S and we took out one of the drivers from them and one from my HD700 and they don't sound the same outside of any housing so I'm pretty confident that the drivers in the HD660S is not the same as those in the HD700. Granted all we did was hold them next to our ears connected to the same source, not very scientific but it was easy to notice that they don't sound the same, but also weird without any housing.

A picture would have been nice. Anyways, I was just kidding about the whole subject, lol. I hope you did not damage anything on the HD660S or the HD700. Would be a pity.

 

[DavidA]

I am assuming you meant "look" instead of "sound"

anyway, thanks for clarifying, not sure what Sennheiser was saying when they said "based on HD700", maybe its just a marketing tactic. Its also interesting to note that many, consider the HD660s are neutral to brighter than HD650s so maybe thats where the similarity was reference. Either way glad we clear that up. I am still standing by what I said regarding two same drivers can sound totally different, as in the case of HD800 vs HD800s.

They do look similar and since they are both 150ohm drivers I think this is where some got the idea that the HD660S drivers were from the HD700 but even if drivers look the same they can have many other different variable that will alter the sound.

A picture would have been nice. Anyways, I was just kidding about the whole subject, lol. I hope you did not damage anything on the HD660S or the HD700. Would be a pity.

The thought of damaging the drivers did crepe in to my mine when trying to get the HD700 drivers out which is a bit harder than the HD6 series. One good point that came about was that after seeing how small the wires are from the connector to the drivers I can't see how using really large cables would make a difference since it still has to travel from the jack to the driver over the really fine wires.