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oldric_naubhoff's picture
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RE: Transmission Line vs Reflex Ported vs Isobaric

Electro wrote:

I don't know if anyone read the link in my last post Smile

But here is the most relevant section .

 

 

Glennie may be one of the best listeners in the world, because she has had to develop the listening abilities of her entire body. Since the age of 12, she has been profoundly deaf, which means her ears deliver only a fraction of the sound vibrations that she picks up most vividly through her feet, hands, chest and whatever else in her frame responds to the vibrations from her various instruments.

"The body's like a huge ear," she says. "It's as simple as that."

I red this one and I thought it must be working for her. I mean, she's incapacitated hearing so she developed bypassing mechanism that enables her to exist. it's just like with blind people who can move around with uncanny precision. but that does not mean blind "see" better. and I also hope you're not trying to say that the body is as sensitive receiver of sound waves as the eardrum and following bones? I beg to differ on that one. I wonder how can she feel sounds nearing 0dB which is the threshold of human hearing...

I can also appreciate the fact that she may feel sounds as she can't hear them. as I said above human body will create a bypass mechanism if one means to gauge the environment becomes defunct. but I believe in normal, hearing humans this kind of mechanism is rather inexistent.

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RE: Transmission Line vs Reflex Ported vs Isobaric

I think its how the manufacturer selects drivers to match the port design or how ports are matched to the bass drivers that really matters. My experience varies a lot but I will mainly share my experience on reflex ports. I love Mordaunt Short's tight bass signature (having owned 902is and the Mezzo 6's), the Mezzos never boom and they have ports at the front and back. I love Dynaudio's bass from the DM 2/7 and they would be the bookshelves I would happily settle down with in my medium sized room but they are rear ported and tend to boom in corners. I can't remember hearing many modern speakers with sealed boxes but almost every sealed sub I've heard sounded good. I think that rear ports probably give the most bass, not necessarily the best bass and are trickier to position. Whenever I hear speakers with 2 ports or more they tend to have better defined bass. 

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RE: Transmission Line vs Reflex Ported vs Isobaric

Electro wrote:

I don't know if anyone read the link in my last post Smile

But here is the most relevant section .

 

 

Glennie may be one of the best listeners in the world, because she has had to develop the listening abilities of her entire body. Since the age of 12, she has been profoundly deaf, which means her ears deliver only a fraction of the sound vibrations that she picks up most vividly through her feet, hands, chest and whatever else in her frame responds to the vibrations from her various instruments.

"The body's like a huge ear," she says. "It's as simple as that."

 

If you've not watched the film It's All Gone Pete Tong, you really should. 

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RE: Transmission Line vs Reflex Ported vs Isobaric

BenLaw wrote:

Electro wrote:

I don't know if anyone read the link in my last post Smile

But here is the most relevant section .

 

 

Glennie may be one of the best listeners in the world, because she has had to develop the listening abilities of her entire body. Since the age of 12, she has been profoundly deaf, which means her ears deliver only a fraction of the sound vibrations that she picks up most vividly through her feet, hands, chest and whatever else in her frame responds to the vibrations from her various instruments.

"The body's like a huge ear," she says. "It's as simple as that."

 

If you've not watched the film It's All Gone Pete Tong, you really should. 

I haven't seen it but I will watch it Smile

Thanks for the recommendation  it looks like it's a very moving story told in a light hearted manner judging from the brief description I just read .

 Electrocompaniet EMC 1 UP , Monarchy Audio DIP, Electrocompaniet ECD 1 dac , EC4.8 preamp , 2x AW180 monoblock power amps , PMC PB1i speakers . Thousands of Cd's .

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RE: Transmission Line vs Reflex Ported vs Isobaric

Light hearted is a good description! Actually at time's it's pretty intense, bizarre at other times but it does have a powerful story at its heart and is also excellent if you like dance music. The Ibiza club scenes are probably the best around  Smile

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RE: Transmission Line vs Reflex Ported vs Isobaric

Electro wrote:

CnoEvil wrote:

oldric_naubhoff wrote:

CnoEvil wrote:

Transmission Line vs Reflex Ported vs Isobaric

none of the above.

I appreciate everybody's input, but almost all the answers are for a question I haven't asked.

I'm well aware of the advantages of a sealed cabinet and even Electrostatic/Maggie type panels, but am less sure about the 3 types I've mentioned in the title.....eg. Does the TL type design have a clear advantage, or is a lot of it to do with "marketing  mystique".

Don't mean to sound ungrateful for input so far

Cno

In my opinion and  based only on many years of listening to different types of speaker I would say that all different designs and types of speaker have their individual strengths and weaknesses but ultimately I have chosen speakers using PMC's version of a transmission line as the best all round compromise that suits my idea of what a HiFi system should do .

 I think this is because they seem to produce the most life like deep textured bass with real pitch accuracy that does not overwhelm the rest of the music and you can also feel it as well as hear it. 

Bass instruments sound like they are part of the music contained within a large sound stage and can be identified in the same way as all the other instruments with their own individual character and separate space much more like real bass instruments playing as part of a real live performance .

When listening to a well recorded piece of music especially a good live recording this real depth and cleanliness in the bass frequencies seems to free up the mid and top frequencies to create a wonderful deep and wide stage behind the speakers that can often appear to be many meters deep and wide , the wall behind the speakers disappears completely and the bass instruments are an equally identifiable part of the illusion in their own space and in proportion to the rest of the instruments .

So in my opinion modern transmission line speakers do have a real and clear advantage , but I am sure many others will disagree. Smile

I am sorry that I can't give you a more technical explanation but I have done my best to explain what my transmission line speakers do for me that other types of speaker don't seem to be able to . Smile

 

 

 

 

+1 for feeling live music, and the the expansion to a recorded track that deep bass brings.

 

I've jumped from page 2 to here sorry, but in my impatience to answer this:

 

[quote="oldric_naubhoff"]

you see, the difference between me and you is that in such a case I hear the roar of a jet engine flying up above me and I don't dilusion myself that I'm feeling something.

[quote/]

Most of what you "hear" below 100Hz or so is via your body structure resonating, and not "direct" pressure waves into the cochlea. You have only to try wearing in ear headphones to figure out what the skeleton does for sound perception. If you're in doubt, take a trek to next years download festival or similar. Believe me, I can't really "hear" as in distinguish what ACDC have ever played live other than a distorted slightly harmonic white noise in my ears, but I can sure tell what the drummer was doing all the way through. Via my chest.

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RE: Transmission Line vs Reflex Ported vs Isobaric

SteveR750]</p> <p>I've jumped from page 2 to here sorry, but in my impatience to answer this:</p> <p>&nbsp;</p> <p>[quote="oldric_naubhoff"]</p> <p>you see, the difference between me and you is that in such a case I hear the roar of a jet engine flying up above me and I don't dilusion myself that I'm feeling something.</p> <p>[quote/ wrote:

Most of what you "hear" below 100Hz or so is via your body structure resonating, and not "direct" pressure waves into the cochlea. You have only to try wearing in ear headphones to figure out what the skeleton does for sound perception. If you're in doubt, take a trek to next years download festival or similar. Believe me, I can't really "hear" as in distinguish what ACDC have ever played live other than a distorted slightly harmonic white noise in my ears, but I can sure tell what the drummer was doing all the way through. Via my chest.

oh man... you shouldn't have jumped from page 2. what you're writing here is exactly what was my point. you go to an amplified ACDC concert - you feel percussion thumping in your chest. you go to an unamplified philharmonic concert  - and you can't feel tympani thumping in your chest. meaning - speakers distort the way the sound is reproduced. however, I appreciate that many may enjoy this kind of coloration.

it's a good thing you bring up headphones because for me headphones present bass notes in a much more convincing, lifelike way than most speakers.

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RE: Transmission Line vs Reflex Ported vs Isobaric

SteveR750 wrote:

Most of what you "hear" below 100Hz or so is via your body structure resonating, and not "direct" pressure waves into the cochlea.

BTW this statement is rubbish. there are hair receptors of sound waves in our ears down to ca.20Hz. if it wasn't so you wouldn't be able to hear any deep bass through headphones.

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