Quote from: jerg on September 27, 2013, 03:23:14 PMIt (the back vents) does seem quite detrimental to HE400s, unlike the more mild measurable changes on the HE500s. If I had designed the mod around HE400s in the first place, I would not have done the back vents anyhow, because HE400s do not have a metal bar welded across the middle of the drivers that like to irritate ears; also, HE400s are open-sounding enough, the backvents would not offer nearly as much soundstaging improvement as they do on the HE500s.The vent definitely seems to work better with the HE-500. The measurement changes are minimal (especially when compared to the HE-400) and I'm sure that the open-ness is an improvement. Wonder if it's worthwhile to measure with a vent in the front and the back simultaneously (on the HE-500 ofc). From your impressions as well as other users on HF, the front vent seems to add even more air to the sound, but it doesn't help the driver irritation from the lack of space. Having two vents would solve that issue but I have a feeling that you might see a quicker bass roll-off... Alas, I don't even know what the HE-500's sound like!
It (the back vents) does seem quite detrimental to HE400s, unlike the more mild measurable changes on the HE500s. If I had designed the mod around HE400s in the first place, I would not have done the back vents anyhow, because HE400s do not have a metal bar welded across the middle of the drivers that like to irritate ears; also, HE400s are open-sounding enough, the backvents would not offer nearly as much soundstaging improvement as they do on the HE500s.
You need at least a partial direct contact between the mounting ring and the cup for HE500's bass extension; having both sides lifted by vents (or anything else really) = literally no low~sub bass left. That's one of the first things I noted when I played around with pads.
Quote from: jerg on September 27, 2013, 03:58:25 PMYou need at least a partial direct contact between the mounting ring and the cup for HE500's bass extension; having both sides lifted by vents (or anything else really) = literally no low~sub bass left. That's one of the first things I noted when I played around with pads.Hmm, yeah, I figured as much. I like the idea of creating a pad system similar to the MA900 though (as you've mentioned several days ago). Obviously this would throw a lot of sub-bass out the window but I'm sure that wouldn't be a problem for a lot of users. It's just a matter of making a pad with two rings (one to mount to the headphone, one for the pad to mount to) which are at a 20° angle or so. Should provide for a fun, airy listen. Not sure if the HE-400 or HE-500 would be a better candidate though.
Quote from: Thujone on September 27, 2013, 04:08:14 PMQuote from: jerg on September 27, 2013, 03:58:25 PMYou need at least a partial direct contact between the mounting ring and the cup for HE500's bass extension; having both sides lifted by vents (or anything else really) = literally no low~sub bass left. That's one of the first things I noted when I played around with pads.Hmm, yeah, I figured as much. I like the idea of creating a pad system similar to the MA900 though (as you've mentioned several days ago). Obviously this would throw a lot of sub-bass out the window but I'm sure that wouldn't be a problem for a lot of users. It's just a matter of making a pad with two rings (one to mount to the headphone, one for the pad to mount to) which are at a 20° angle or so. Should provide for a fun, airy listen. Not sure if the HE-400 or HE-500 would be a better candidate though.Kinda like an exaggerated backvent mod.
Quote from: jerg on September 27, 2013, 04:13:25 PMQuote from: Thujone on September 27, 2013, 04:08:14 PMQuote from: jerg on September 27, 2013, 03:58:25 PMYou need at least a partial direct contact between the mounting ring and the cup for HE500's bass extension; having both sides lifted by vents (or anything else really) = literally no low~sub bass left. That's one of the first things I noted when I played around with pads.Hmm, yeah, I figured as much. I like the idea of creating a pad system similar to the MA900 though (as you've mentioned several days ago). Obviously this would throw a lot of sub-bass out the window but I'm sure that wouldn't be a problem for a lot of users. It's just a matter of making a pad with two rings (one to mount to the headphone, one for the pad to mount to) which are at a 20° angle or so. Should provide for a fun, airy listen. Not sure if the HE-400 or HE-500 would be a better candidate though.Kinda like an exaggerated backvent mod.Bingo. Ortho soundstage monsters.
Quote from: Thujone on September 27, 2013, 04:18:06 PMQuote from: jerg on September 27, 2013, 04:13:25 PMQuote from: Thujone on September 27, 2013, 04:08:14 PMQuote from: jerg on September 27, 2013, 03:58:25 PMYou need at least a partial direct contact between the mounting ring and the cup for HE500's bass extension; having both sides lifted by vents (or anything else really) = literally no low~sub bass left. That's one of the first things I noted when I played around with pads.Hmm, yeah, I figured as much. I like the idea of creating a pad system similar to the MA900 though (as you've mentioned several days ago). Obviously this would throw a lot of sub-bass out the window but I'm sure that wouldn't be a problem for a lot of users. It's just a matter of making a pad with two rings (one to mount to the headphone, one for the pad to mount to) which are at a 20° angle or so. Should provide for a fun, airy listen. Not sure if the HE-400 or HE-500 would be a better candidate though.Kinda like an exaggerated backvent mod.Bingo. Ortho soundstage monsters.Something like the HE6 or perhaps the HE4 might be very suited for it then.
Quote from: jerg on September 27, 2013, 04:38:54 PMQuote from: Thujone on September 27, 2013, 04:18:06 PMQuote from: jerg on September 27, 2013, 04:13:25 PMQuote from: Thujone on September 27, 2013, 04:08:14 PMQuote from: jerg on September 27, 2013, 03:58:25 PMYou need at least a partial direct contact between the mounting ring and the cup for HE500's bass extension; having both sides lifted by vents (or anything else really) = literally no low~sub bass left. That's one of the first things I noted when I played around with pads.Hmm, yeah, I figured as much. I like the idea of creating a pad system similar to the MA900 though (as you've mentioned several days ago). Obviously this would throw a lot of sub-bass out the window but I'm sure that wouldn't be a problem for a lot of users. It's just a matter of making a pad with two rings (one to mount to the headphone, one for the pad to mount to) which are at a 20° angle or so. Should provide for a fun, airy listen. Not sure if the HE-400 or HE-500 would be a better candidate though.Kinda like an exaggerated backvent mod.Bingo. Ortho soundstage monsters.Something like the HE6 or perhaps the HE4 might be very suited for it then.Why do you say that? I'm not too familiar with those two...
