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01-26-2019 Post does not mapped to Knowledge Tree
Sound22Card
Posts 5
Joined on 01-26-2019

Post #: 1
Post ID: 25242
Reply to: 25242
Audio treasure find
Wow!  Did I ever stumble onto the right website.I've got enough reading here for a few lifetimes.
Recently I cracked open a couple of speaker cabinets that I obtained years ago.  Inside I found a Vitavox AK 121 woofer and a G.P. 1 horn unit, along with a 233 crossover box.  As pics will show, these are all in what seems to be....excellent...condition.  I fired them up and am amazed at the air they move. The sweep from horn to woofer is smooth, detailed and very alive.  I tried China by Vangelis and the almost inaudible bass notes he put in.....were there...chest-thumping and surprising.  These cabinets were manufactured in Toronto, CANADA, by the now defunct Astral Electrics.  The horns protruded ahead of the woofer so they kind of counter sunk the speaker baffle a few inches in, to allow a grill cloth to cover.  The exterior of the cabinet is well-made and substantial but the baffle and the floor are of cheap wood.  There is also a 4" x 5" rough-cut hole in the floor of each cabinet.  
I offer these units for sale and if no movement, then I will totally enjoy them myself.  
Just thought I'd drop this in here.  Someone who knows more about them could possibly enhance or improve them to modern standards.  They are so loud but so smooth.  From Nat King Cole and Sarah Vaughn to Chicago, ...greatly produced music by the Bee Gees, M. Jackson and Uriah Heep, .....they give an energy and a sparkle that I have only seen in modern 'monster' units.
I welcome any reply, or any added info.  

01-26-2019 Post does not mapped to Knowledge Tree
Sound22Card
Posts 5
Joined on 01-26-2019

Post #: 2
Post ID: 25243
Reply to: 25242
Audio treasure find
Other pic
01-26-2019 Post does not mapped to Knowledge Tree
Sound22Card
Posts 5
Joined on 01-26-2019

Post #: 3
Post ID: 25244
Reply to: 25243
Audio treasure find
Another....
01-26-2019 Post does not mapped to Knowledge Tree
Sound22Card
Posts 5
Joined on 01-26-2019

Post #: 4
Post ID: 25245
Reply to: 25244
Audio treasure find
Last one.   
01-26-2019 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,642
Joined on 05-28-2004

Post #: 5
Post ID: 25246
Reply to: 25242
It is simple as this.
I do not know how about the “greatly produced music by the Bee Gees, M. Jackson and Uriah Hee” and the rest of the crap. It appears to me that you do not need to spend time “enough reading here for a few lifetimes”. You do not need audio sites but some other sites, which is a different story all together. 

What you found is reasonable, there was many custom-made enclosures with all possible drivers from 50 and 60, it was a busses model at that time, the companies made driver and local wood shops built enclosures. Even I know generally Vitavox products well but I never dealt with GP compression driver and 12” woofer. I think I had it once, not a pair but single driver but I had no use for them and I do not think I try them sensibly. The AK 121 should not be similar to 151 I presume.... That all that I can tell you, wish is not much.   

If you insist to convert whatever you have now to “modern standards” and to “enhance or improve” you driver performance then you must have a well defiled list of the very specific critiques of how you drivers perform now. Go over your list and address the problem one by one. It is simple as this.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
01-26-2019 Post does not mapped to Knowledge Tree
Sound22Card
Posts 5
Joined on 01-26-2019

Post #: 6
Post ID: 25247
Reply to: 25246
Ya, ...OK!
RtC, 
I am VERY thankful to you for the info, ...sincerely, ... but not for the 'attitude'.  My taste in music, which is very varied, is not in question here.  I also did not say I was going to enhance the speakers.  I said the others, who knew more, might want to.  As to what I read, again, it is not the subject here.
This is an amazing site and I will continue to visit and read, to increase my knowledge.  I don't need any more negativity though.
01-27-2019 Post does not mapped to Knowledge Tree
rowuk


Germany
Posts 288
Joined on 07-05-2012

Post #: 7
Post ID: 25248
Reply to: 25247
No negativity
SoundCard22,
at one point in time you will realize that the music that you mentioned does not have the technical qualities to discern performance of any high quality playback. Very primitive engineering techniques hide color, space and dynamics. This problem is not unique to popular music, but certainly the goals of popular music are more tied to sales to people with very limiting playback. Designing an art form to fit in the acoustic space and dynamics of a car, a cheap stereo simply means that all of the warts will be more present than the qualities that are documented here.
There is a post here by Romy that accurately documents that the higher quality the playback, the worse that "lacking" recordings will sound.
That all being said, it was not a challenge to your choice of entertainment, rather only that that choice will not lead you to sonic nirvana.


Whenever I feel blue, I start breathing again.
01-30-2019 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,642
Joined on 05-28-2004

Post #: 8
Post ID: 25251
Reply to: 25247
It is OK.
 Sound22Card wrote:
I am VERY thankful to you for the info, ...sincerely, ... but not for the 'attitude'.  My taste in music, which is very varied, is not in question here.  I also did not say I was going to enhance the speakers.  I said the others, who knew more, might want to.  As to what I read, again, it is not the subject here.

Sound22Card, I express no “attitude” in my post but rather my long standing position. The rowuk  is correct about the fact the music you mentioned does not have the musical wealth to be discriminated by higher or lower quality playback. Not that it is “bad music” and I imply anything about your personal taste or preference. It is just not a material, in purely audio sense, that would allow people interact and to have any common scene of listening values.   It is also the material that has no expressive complexity or any kind sonic demands. I know that you do not understand what it all means and I sound to you like a snobbish jerk. It very much might be so but let me give you an association that might illustrate my point of view. Pretend that you burn some very specific hallucinogenic insects in a very septic way in order to very narrow navigate the direction of your hallucinogenic trip. Then somebody observe your action and concludes that the burn smoke itself is your objective and that sniffing the smoke of an automobile exhaust is a similar activity.  My standing is that M Jackson has as much relationship to a needs for a better audio as your consideration what king motor oil to put in a care in order your exhaust sniffing to become more “productive”. My apology for the stupidity of the example and perhaps for the inaccuracy: I know very little about artificial stimulants but insists that the quintessence of the example is quite accurate.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
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