Goodmans Axiom 301 Speaker

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Goodmans Axiom 201 Report (crosspost from Bottlehead Asylum) 195.99.125.202. Posted by Thorsten on December 6, 1999 at 06:45:25. Goodmans goodmans industories ltd. 1952（昭和27年） axiom 80 24cmフルレンジスピーカーユニット￥26,500 神格化された異端の名作。このユニットを真っ先に目をつけ、自家用としたのは、弱冠22歳. Jun 20, 2020 Details about Goodmans Axiom 301 PAIR, Excellent, 12' Fullrange, KLANGFILM, Tube amp speaker. 1 viewed per hour. Goodmans Axiom 301 PAIR, Excellent, 12' Fullrange. Goodmans drivers are all efficient/sensitive and both the Twin Axioms and Axiom 80's I assumed to be around 98 dB/W/m. I say assumed because there is very little to go on as in the day sensitivity was a given in speaker design. Twin Axiom details are here and information on the Axiom 80' is here.

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Goodmans Axiom 301 Speaker Problems

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DIY 12' Goodmans Axiom Horn - Part II

Space, the instruments and the music

[Italian version here]

DIY design: horn loudspeaker for 12' Goodmans Axiom 201 drivers
Author: Chris Templer - TNT-Audio South Africa
Published: September, 2015

Introduction

Having proved the design using a 12' Tannoy driver and having a pair of NOSGoodmans Axiom 201 drivers in unsatisfactory reflex cabinets the step to another pair was almost a must. This short article furthers myexperiments with the Coral derived horn.

Design & driver

As before the outer panels are 32 mm thick Supawood (dense MDF) and finish is piano black. Again the hardest part are the cut outs required to fitthe magnet structure of the Goodmans driver which is very different in size from the 12' Tannoys.
The panels behind the driver this time have a 50 mm layer of high density foam to stop back reflection through the cone. As the Goodmans cone is thinner and the structure of the speaker is very open back reflections are a problem if not damped out.

The 201 has a rating of 15 Watts at 16 Ohms (according to the specs: 30 Watts USA) and is extremely sensitive. Figures ofaround 95 dB are quoted (at 16 Ohms apparently 100 dB). I have owned more than a few pairs of these drivers and they are well nearindestructible despite their rating and do not suffer from problems with the surround, ever.

Cone excursion is a total of 20 mm but good cabinet design limits this. In the Coral derived horn the cones only justtremble with less than a couple of mm movement even on loud crashes or bass drum strikes. Which is what should be expected from a good horncoupling.

There have been comparisons between the better class Lowther drivers and the Axioms with the Goodmans being equally transparent, but without the humps in response of the Lowthers and I might add without the bending frames or fragility of the cones and surrounds.

These drivers can still be had via the second hand market at very reasonable prices or more modern drivers could be substituted provided they are reasonably sensitive.

The sizes once more: 1.140 high X 0.470 wide x 0.450 front to back, and again that measurement does not take into account the lip sticking out at the bottom.

There are ring covers for the driver mounts the screws of which still need to be blackened and the light colour wooden cabinetsurround is of Jacaranda wood as before.

Above is the finished item. The HF horn on the Tannoy uses two EMIT ribbons on the Tannoys, no extra help is needed for the Goodmans. At left rear the Double Autographs horns with two 15' Tannoy Monitor Golds per side.

Listening impressions

The equipment used again, is as follows. Shure V15 V with Gyger stylus, EMT 948 turntable with EMT 929 Tone Arm, Jolida PhonoStage, Valve pre-amp and Parallel 300B SET Mono Blocks built by Alan Hobkirk here in South Africa. Maximumpower is around 8 - 12 Watts. Interconnects are from LM 240LF coax.Good for up to 5 GHz with a loss of 5 dB per/100 meters at 30MHz so atthe low frequency that we use in audio there is no loss worth speakingabout. Speaker leads are from twin lead (rip cord), conductor 2 mm sq.

This was quite a revelation in that the Goodmans easily outperformedthe Tannoys in every aspect. The Goodmans are more revealing and lesscoloured than the Tannoys with better upwards extension. In theprevious article I alluded to how the Tannoys got the timbre, scale andspace information right. I now need to backtrack a bit on the timbrepart as the Goodmans are more real sounding than the Tannoy. TheTannoys are very, very good but I prefer the Goodmans.

Conclusion

The point of this exercise was the Coral Horns and their design with themodification I applied have worked out better than I could have hoped.
In both cases the scale of the sound is better than most any other speaker I have heard apart from far bigger and much more expensivesystems. Both versions throw a sound stage that is wider than the cabinet placement, center to center 4.2 meters apart and because ofbeing horns can be placed against the rear wall which frees up room space.

Both of them reproduce the ambiance of the venue and both image extremely well despite being further apart than what is considered thenorm. As an aside my Double Autographs are much further apart and also image perfectly. One feature of horns is that they tend to energize theentire space they are in and most of the time (recording dependent) are hard to localize as actual speakers, rather there is a big wide andhigh sound field that instruments play in as per live concerts.

Both, again due to them being horns, have transient attack and dynamics that lesser speakers just don't have and are easily in the same range aselectrostatics but without the danger of becoming barbecue grids when the volume is cranked up! Rock or orchestra, solo guitar or trumpet,brass band or jazz quartet - you are there!

Goodmans Axiom 301 Speaker Reviews