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Old 8th December 2009, 08:50 PM   #1
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Default Cabinets for tannoy 10" hpd's

I have recently aquired a pair of tannoy eatons, 10" hpd's in reasonably small ported cabinets.

I like them, but am wondering if there are any better cabinet designs around?

Ive been searching the net for hours every night but cant find anything for these drivers, its all about the 12's and 15's

Any thoughts?

If i cant find anything, is it worth damping/bracing the origional cabinets?

Everything ive read about moding tannoys says the best mod is bigger cabinets but i cant find anything to go on.

Thanks.
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Old 8th December 2009, 09:58 PM   #2
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Tannoy Speakers
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 8th December 2009, 10:34 PM   #3
Xoc1 is offline Xoc1  United Kingdom
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I found the Driver parameters Here
tannoy
I then entered the Parameters into WinISD Alpha
QES 0.26
QTS 0.23
FS 26 Hz
VAS 0.2 m3
BL 11.2
RE 5.8 Ohm

WinISD then calculates the missing Parameters

You can then model up a Ported Cabinet.
I found that 150 litre box worked reasonably well tuned to 35hz
This gives the same shape of frequency response curve that you might expect from the Tannoy 15"
2 X 100mm ports would be suitable.
You would have to decide what size box you can live with and play around with the variables.
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Old 9th December 2009, 07:15 AM   #4
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Biamp.

Put them in a small sealed box and use the passive xover. Then add a suitable sealed or ported driver to do the LF. I'd experiment with xover freqs, but would probably start at around 150Hz.
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Old 9th December 2009, 08:36 AM   #5
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Quote:
Originally Posted by Xoc1 View Post

You can then model up a Ported Cabinet.
I found that 150 litre box worked reasonably well tuned to 35hz
That is the kind of shape of sim i patently avoid... either it is tuned too low or the box is too big (or both).

Brett's method is going to get you the most... I'd tend towards an aperiodic mid-TL thou.

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Old 9th December 2009, 11:27 AM   #6
Xoc1 is offline Xoc1  United Kingdom
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Quote:
That is the kind of shape of sim i patently avoid... either it is tuned too low or the box is too big (or both).
Please don't get to upset about the shape of the response in my sim it was only meant as a quick example of what is possible. I overcooked the bass port resonance and made it a bit too large.
To get a flat response from a Tannoy dual concentric you will be looking at a very small box with poor bass extension. The bass response starts to sag in an enclosure over 45litres or so.

Quote:
Everything ive read about moding tannoys says the best mod is bigger cabinets but i cant find anything to go on.
Inspiration for the large cabinet size comes from here

Tannoy Monitor Gold Cabinets

This shows a cabinet for the Monitor Gold 12" from 75 to 150 litres,
And a cabinet for the Monitor Gold 15" at 300 litres!

The Original Tannoy Dual Concentric speakers were produced before TS parameters came into use for speaker design. They are designed for large cabinets, and to be placed in corners. This helps with the sagging LF response.
Please note the sizes of the modern equivalent dual concentric presteige series.
The Tannoy Kensington (10" driver) is a 105 litre cabinet.
The Tannoy Westminster Royal (15" driver) is 530 litres
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Old 9th December 2009, 11:55 AM   #7
AndrewT is offline AndrewT  Scotland
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a big vented box tuned low can sound good.
But 35Hz from that 10inch driver is just too low.
You must eliminate the hump and try to find a slowly falling LF response.

If you go for a slowly falling response it will sound bass light. It really needs a low bass driver to augment it. Now you are designing a 3way. But, it could be excellent.
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Old 9th December 2009, 05:37 PM   #8
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Thanks for the input folks.

I know nothing about speaker design though. Not sure i'd have the first idea about designing a new box, thats why i was looking for already known plans.
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Old 10th December 2009, 09:01 AM   #9
AndrewT is offline AndrewT  Scotland
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download WINisd pro.
It's excellent, intuitive and has lots od different outputs to enlighten your knowledge on how your driver will perform in open space.

In a room a humped response will lead to unnatural voice and that tendency to one note bass really does not sound nice. WINisd cannot tell you how it will sound in a room. That's down to experience.
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Old 10th December 2009, 09:15 AM   #10
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Quote:
Originally Posted by graeme uk View Post
Thanks for the input folks.

I know nothing about speaker design though. Not sure i'd have the first idea about designing a new box, thats why i was looking for already known plans.
For bass, under a couple of hundred Hz, which is where you're talking about for the aux driver, it's straighforward. Throw the 10" in 20L or so, sealed. It's not going to be critical.

Some people like WinISD, but I find it klunky and prefer Unibox, also free but requires Excel. Either will give similar calculated results, just depends on what interface you prefer.
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