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Single driver design that excels in the human voice range
Single driver design that excels in the human voice range
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Old 14th January 2021, 05:23 PM   #1
Jdiesel87 is offline Jdiesel87  Canada
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Default Single driver design that excels in the human voice range

I was thinking of undertaking a new project with the goal to produce a no-compromise single mono Bluetooth speaker to play audiobooks and podcasts. I want something that does a great job of naturally reproducing the male and female speaking voice with everything else not being important.

I'm thinking of doing some type of omni-directional or di-pole design where the speaker can be placed flexibly in a room and not have the listening sweet spot limited to a small location.

Anyone have ideas or suggestions to get me rolling on this idea?
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Old 14th January 2021, 10:02 PM   #2
Jim Griffin is offline Jim Griffin  United States
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An overkill for you may be a constant beamwidth transducer (CBT) array that would meet your wide room sized sweet spot desire. The technology comes from Don Keele Jr. the famous long time loudspeaker pioneer in the field.

My Modified CBT24 arrays were derived from Don's work and have exceptional in-room performance. See my journey at:

My New Line Array--It's a Modified CBT24

Jim

Last edited by Jim Griffin; 14th January 2021 at 10:05 PM.
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Old 14th January 2021, 10:31 PM   #3
nigelwright7557 is offline nigelwright7557  United Kingdom
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Fane 12-250TC would be my choice.
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Old 14th January 2021, 11:06 PM   #4
Nikolas Ojala is offline Nikolas Ojala  Finland
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Post Some ideas

Resistance / aperiodic enclosure. A very simple and small box with an acoustic resistance vent. Something like this: US2065751A - Acoustic resistance device
- Google Patents


You could use Dynaudio / ScanSpeak Variovent or construct a similar device by yourself.

Driver:
QTS < 0.45
SPL ≈ 90 dB
Single cone design.

I don't know what kind of amplifier you would use, but in case you chose low voltage and class AB, then low impedance ( 4 Ω or less ) and high efficiency would be desirable properties for the driver.

With an aperiodic speaker enclosure you could also use current-drive with an amplifier like this: Current Drive

Or if you wish to make a class D amplifier, then perhaps something like this: US7924091B2 - Class-D transconductance amplifier
- Google Patents


You want the speaker omnidirectional, so make the driver shout down and place a conical mirror below to spread sound. I think that would be the natural way to prevent the driver collecting dust.

More about omnidirectional speakers: Omnidirectional speakers
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Old 15th January 2021, 11:55 AM   #5
chris661 is offline chris661  United Kingdom
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Quote:
Originally Posted by nigelwright7557 View Post
Fane 12-250TC would be my choice.
Having heard that exact driver, I'd veto that. Rough in the kHz range, and wants a really big box.


To the OP, the SB65 is pretty good. Maybe use it up-firing with a small conical deflector to get it towards omni.

Chris
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Old 15th January 2021, 11:57 AM   #6
nigelwright7557 is offline nigelwright7557  United Kingdom
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I have a pair in a small box here that sound very good.
I wouldn't have recommended it otherwise.
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Old 15th January 2021, 12:17 PM   #7
scottjoplin is offline scottjoplin  Wales
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Well, there's no arguing with that.
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Old 15th January 2021, 07:41 PM   #8
freddi is offline freddi  United States
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- might cram a 12-250TC into a 40 liter closed box
Click the image to open in full size.
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Old 15th January 2021, 08:20 PM   #9
planet10 is online now planet10  Canada
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Single driver design that excels in the human voice range
These are the best speakers i have heard for voice. Drivers come in pairs so a bi-pole/omni-pole could be devised. I would look to a castle-stle arrangement of drivers.

Click the image to open in full size.

1st thot woud be the mMar-Ken6pT box, same shape, 2x as big) one on the front, one on the top of this box drivers wired in series):

http://www.planet10-hifi.com/planset...nts-030218.pdf

dave
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Old 15th January 2021, 08:32 PM   #10
pelanj is offline pelanj  Czech Republic
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Single driver design that excels in the human voice range
FaitalPro 3FE22/25 are realy great and sensitive.
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