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Old 12th Jan 2017, 6:41 pm   #21
stevehertz
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Default Re: Jabez Gough - Welsh wizard?

So the HF must bounce off the angled lid? Seems a bit hit and miss to me, I'm imagining that the frontal, on-axis frequency response must be pretty bad? But clearly the speaker is much loved and respected by lots of people! Maybe its design philosophy is akin to Bose's whereby their designs account for the fact that in real life situations sound doesn't only come to us from the speakers but from all over the room.
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Old 13th Jan 2017, 3:29 pm   #22
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Default Re: Jabez Gough - Welsh wizard?

I don't know how much loss is involved in the reflecting of the higher frequencies but the off axis performance is a bit better than most forward firing speakers - I guess because the reflection widens the angle a bit? I had an old Decca Stereo Decola for a long time - with its 12 mid range drivers firing in all directions the off axis performance was astonishing - the Gough is nothing like as good as that.
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Old 24th Jan 2017, 5:11 pm   #23
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Default Re: Jabez Gough - Welsh wizard?

Many thanks to Andy, who has supplied me with a NOS Goodmans twin Axiom 8 LS. This has smoothed out a lot of the peaks and troughs - I think it must be the driver Mr Gough had in mind all those years ago.
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Old 24th Jan 2017, 7:24 pm   #24
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Default Re: Jabez Gough - Welsh wizard?

Was it not called Axiette?
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Old 24th Jan 2017, 10:55 pm   #25
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Default Re: Jabez Gough - Welsh wizard?

There was a twin cone Axiette - I had one for many years and went searching for it for this LS but I must have given it away or used it. This is definitely an Axiom, 8", 15ohms.
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Old 25th Jan 2017, 8:00 am   #26
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Default Re: Jabez Gough - Welsh wizard?

Glad to have been of help Roger. I sold an Axiette about 6 month's ago, if I remember rightly the Axiette 8 is lower powered compared to the Axiom, 6 watts I think and it had a lower frequency range.

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Old 25th Jan 2017, 3:06 pm   #27
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Default Re: Jabez Gough - Welsh wizard?

If you haven't already, Google images will show many variations of Axiom and Axiette speakers, they are different models in the Goodmans range.
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Old 25th Jan 2017, 3:18 pm   #28
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Default Re: Jabez Gough - Welsh wizard?

If there's no concentric cone tweeter in the Axiom, how is the HF response on this - does it warrant the addition of a sperate concentric tweeter?
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Old 25th Jan 2017, 4:17 pm   #29
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Default Re: Jabez Gough - Welsh wizard?

There is a concentric tweeter in the Twin Axiom 8 see pic.

Pic lifted from this Ebay guide, which is rather interesting - http://www.ebay.co.uk/gds/Realistic-...0354321/g.html
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Old 25th Jan 2017, 5:46 pm   #30
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Default Re: Jabez Gough - Welsh wizard?

Quote:
Originally Posted by RojDW48 View Post
There is a concentric tweeter in the Twin Axiom 8 see pic.
Many thanks for refreshing me. What a well built unit.

Whilst I have not searched of late, I suspect it might be quite hard to find a good twin cone unit of this size these days.
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Old 25th Jan 2017, 5:56 pm   #31
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Default Re: Jabez Gough - Welsh wizard?

It's not a concentric tweeter, it's just a whizzer cone.

Regards, Paul
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Old 25th Jan 2017, 8:21 pm   #32
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Default Re: Jabez Gough - Welsh wizard?

So a concentric tweeter is a separate little driver? Like the ones mounted across the centre of the old EMI ellipticals?
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Old 26th Jan 2017, 7:14 am   #33
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Default Re: Jabez Gough - Welsh wizard?

Think so Roger. A dual concentric tweeter AFAIK is a cone with a tweeter cone "bolted" on the woofer cone. I looked this subject up on google and there doesn't seem to be a consensus of terminology. the term co axial speaker is used too.

A bit about it here- http://www.tannoy.com/lifestyle/inno...er-technology/ .

Found this- https://en.wikipedia.org/wiki/Full-range_speaker . Roger's Axiom speaker has a "whizzer" cone that stand's proud of the woofer cone, a bit like a mushroom and not like the the speaker shown in the Wiki article. Interesting stuff.

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Old 26th Jan 2017, 11:47 am   #34
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Default Re: Jabez Gough - Welsh wizard?

A tweeter cone/parasitic cone/whizzer cone unit, is just one speaker with two cones.

A dual concentric tweeter is 2 seperate speakers e.g. as found in Tannoys or like the EMI units/car audio drivers, with the tweeter/s mounted on a plate over the main diaphram.
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Old 26th Jan 2017, 12:04 pm   #35
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Default Re: Jabez Gough - Welsh wizard?

Looks like one of those interminable hi-fi arguments, doesn't it? The whizzer cone and other single point solutions have always seemed to me to be a bit of guesswork which sometimes works. Whereas the separate driver route at least seems to offer the benefit of choosing the appropriate drivers and designing the crossover to make the best of them. However - the B160 + T27 solution didn't work as well as the Axiom 8 in this cabinet!

The B160 is intended to have a separate tweeter fitted in its centre - I would like to hear how well that works one day.
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Old 27th Jan 2017, 2:05 pm   #36
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Default Re: Jabez Gough - Welsh wizard?

Also remember that back in the 50s/60s it was considered acceptable to use the tone controls to get the best sound balance Totally verboten these days of course!

Hi-Fi News / Gramophone reviews would often pass comment that they used a bit of boost or cut for best results. WRC records even had little dial pictures on the back of the sleeve so you could record your chosen settings for that disc!
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Old 27th Jan 2017, 2:54 pm   #37
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Default Re: Jabez Gough - Welsh wizard?

I remember them! I still have a WRC recording of Walton's Symphony No 1 and its previous owner had registered his preferred tone control settings on the little printed dials.
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Old 27th Jan 2017, 4:34 pm   #38
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Default Re: Jabez Gough - Welsh wizard?

I think this was all part of rthe early Hi Fi experience. Today tone controls are largely eschewed and the "Direct Path" preferred. But back in time, and especially in the mono only days, systems were not so flat in their specifications and it was quite the norm to enjoy tweaking the luxury of "seperate bass and treble" (and sometimes "middle") controls to get the most enjoyment. Good old Baxendall! OK, so boosting bass to drive the LF harder or a boost on the treble for a supposed "full range" driver was what we enjoyed...
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Old 27th Jan 2017, 7:03 pm   #39
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Default Re: Jabez Gough - Welsh wizard?

Tone controls never went out of fashion in studio desks - except that there they're known as equalisation (EQ) and are generally much more comprehensive than just bass & treble. If you insist on playing everything Flat at home, you're assuming:

1. Your listening room has similar acoustics to the studio control room
2. Your speakers have identical performance to the studio monitors
3. Your taste in tonal balance is identical to that of the studio engineer & producer

These assumptions rarely apply, so use those tone controls as you wish!

Martin
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Old 27th Jan 2017, 7:17 pm   #40
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Default Re: Jabez Gough - Welsh wizard?

I haven't fiddled sufficiently yet, but part of the logic behind using this speaker with my little Tripletone (which is where it is now) was to employ its bass, middle and treble controls to get the best out of it.
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