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Gear / Technical Help => Playback Forum => Topic started by: lsd2525 on June 23, 2017, 04:02:46 PM

Title: Graphine speaker membranes?
Post by: lsd2525 on June 23, 2017, 04:02:46 PM
More snake oil?

https://www.nextbigfuture.com/2017/06/graphene-loudspeaker-membranes-coming-march-2018-and-devices-to-follow.html
Title: Re: Graphene speaker membranes?
Post by: morst on June 25, 2017, 03:18:59 PM
Perhaps not snake oil.

In 1990 I spoke with Dan Healy before the Grateful Dead show at Sandstone, and he was lamenting that there had not been a real advance in speaker technology in many years.

Graphene drivers (and for that matter graphene dynamic mic diaphragms) would not be a bad idea, though it might not be revolutionary.

Remember how the use of "Rare Earth" magnets allowed Sony to increase output and decrease size and weight of their headphones in the early '80's and the Walkman became a thing!?

I see that one point touted for the Graphene products is that the lighter materials will improve battery life (energy efficiency)  - That's hip.
Title: Re: Graphine speaker membranes?
Post by: Ben Turnbull on June 26, 2017, 09:03:46 PM
In my limited grasp of all things tech, I came away thinking that they might be talking of small devices that you'd find in hearing aids, head phones, cell phones e tc... where the speaker was small to microscopic. Not something you'd find in an 8 to 10" driver of your home stereo.  I'm likely wrong.
Title: Re: Graphine speaker membranes?
Post by: morst on June 27, 2017, 04:45:27 PM
In my limited grasp of all things tech, I came away thinking that they might be talking of small devices that you'd find in hearing aids, head phones, cell phones e tc... where the speaker was small to microscopic. Not something you'd find in an 8 to 10" driver of your home stereo.  I'm likely wrong.

Their target market for what I saw does seem to be small devices.

But if you had an efficient enough process, you could make a larger transducer out of a large number of these, (any perfect square would work) 64 of them? 525 of them? 65536 of them?
Title: Re: Graphine speaker membranes?
Post by: lsd2525 on June 27, 2017, 05:05:22 PM
I want some Jensen 6x9's for my Sanyo bi-amp 8-track in my '76 Nova :coolguy:
Title: Re: Graphine speaker membranes?
Post by: capnhook on June 27, 2017, 06:39:09 PM
I want some Jensen 6x9's for my Sanyo bi-amp 8-track in my '76 Nova :coolguy:

I almost thought you might be the guy that stole my car.....but my Sanyo 8-track wasn't bi-amped..... :yack:
Title: Re: Graphine speaker membranes?
Post by: lsd2525 on June 28, 2017, 08:39:55 AM
I want some Jensen 6x9's for my Sanyo bi-amp 8-track in my '76 Nova :coolguy:

I almost thought you might be the guy that stole my car.....but my Sanyo 8-track wasn't bi-amped..... :yack:

I used to keep a box full of matchbooks in the car to jam under the 8-tracks when they started dragging. Hi-Fi baby!!
Title: Re: Graphine speaker membranes?
Post by: Hypnocracy on June 28, 2017, 10:22:15 AM
ya'll some ole farts...and yes I had a 8 Track in my first vehicle...a Raleigh Parks and Rec. Forest Green 1967 Ford Bronco my father bought at the junkyard and we repainted & repaired in our basement.
Title: Re: Graphine speaker membranes?
Post by: lsd2525 on June 28, 2017, 10:58:46 AM
ya'll some ole farts...and yes I had a 8 Track in my first vehicle...a Raleigh Parks and Rec. Forest Green 1967 Ford Bronco my father bought at the junkyard and we repainted & repaired in our basement.

Molly Hatchet's "Flirtin' with Disaster" just sounds better on 8-Track
Title: Re: Graphine speaker membranes?
Post by: Gutbucket on July 10, 2017, 11:20:04 AM
In my limited grasp of all things tech, I came away thinking that they might be talking of small devices that you'd find in hearing aids, head phones, cell phones e tc... where the speaker was small to microscopic. Not something you'd find in an 8 to 10" driver of your home stereo.  I'm likely wrong.

Their target market for what I saw does seem to be small devices.

But if you had an efficient enough process, you could make a larger transducer out of a large number of these, (any perfect square would work) 64 of them? 525 of them? 65536 of them?

True digital speaker? with lots of pixel-like on/off driving elements?
https://en.wikipedia.org/wiki/Digital_speaker

Sort of actual example via MEMS- http://www.icsense.com/cases/128-channel-mems-driver-with-1-8v-to-90v-dc-dc/

^ Except looks to have 87 one volt steps per element rather than two if I read this correctly..
HV switch matrix, 64 columns and 32 rows
Individually programmable outputs with 1V steps
On-chip DC-DC converters (2.9V to 90V)