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   Home » Horn-Loaded Speakers» ... again on GOTO Unit drivers... (108 posts, 6 pages)
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  »  New  The “Dead Points of Live Sound”..  Confused...  Playback Listening  Forum     28  208604  05-14-2005
  »  New  Macondo's Axioms: Horn-loaded acoustic systems..  No wonder...  Horn-Loaded Speakers Forum     72  403940  07-29-2007
  »  New  Eventually - a reasonable midbass horn from GOTO..  Clever DIY going on where?...  Horn-Loaded Speakers Forum     97  884656  11-19-2007
  »  New  8" Goto Woofer for 60Hz Horn..  It's not a Goto 8in driver...  Horn-Loaded Speakers Forum     5  61063  11-03-2008
  »  New  The tapped horns: cons, pros and Sound..  Sorry, no images any more....  Horn-Loaded Speakers Forum     56  483865  04-23-2009
  »  New  Midbass Horns and Real Estate...  Just a youtube video......  Horn-Loaded Speakers Forum     247  1503235  07-26-2009
  »  New  Why GOTO do not care about time-alignment...  Sarcasm isn't my cup of tea...  Audio News Forum     7  39838  09-22-2009
  »  New  Audio-tekne's "Tone Quality Improvement technique&..  Crooked glasses...  Horn-Loaded Speakers Forum     9  56764  10-10-2009
  »  New  The 5-ways from Germany...  Another Kid?...  Horn-Loaded Speakers Forum     38  126487  12-06-2009
  »  New  Configuration from Italy: multisell++ and double model ..  In search of optimum.......  Horn-Loaded Speakers Forum     8  64828  01-02-2010
  »  New  Multi-amping crossovering...  No input capacitor......  Audio Discussions  Forum     6  42140  09-24-2010
08-25-2011 Post does not mapped to Knowledge Tree
Kcct82
Beijing, China
Posts 23
Joined on 09-08-2008

Post #: 101
Post ID: 16862
Reply to: 16846
Trial and Error
fiogf49gjkf0d
Hi Romy,
Well, this is my (and my dad's) first horn system so we're learning/building one step at a time. Our motivation is simple, to use horns as low as possible.
The very first DIY configuration was:TAD ET-703TAD 4002GOTO 505TTTAD 1603 Woofer
We used TAD's because we wanted to try Beryllium diaphragms, and GOTO because we thought it was able to go down to 200hz.
The 2nd Config was:TAD ET-703TAD 4003/JBL 476BeGOTO 505TTTAD 1101h in DIY 1/2 space 53hz exponential w/ 5in square throatTAD 1603 in DIY tapped horn
Since we wanted to go lower with horns, we did what we had to do, build it ourselves! (As far as we know, nothing of this size is available commercially) This config lasted 2 years while we learned more about horns and problems with our own playback/room. The biggest breakthrough came recently when we acquired a RTA. The Goto 505TT sounds good but it doesn't perform well below 400hz (the output drops significantly between 200-400hz) and our 53hz midbass horn is no good up to 400hz... In order to bridge the 200-400hz gap between these drivers we replaced Goto with a horn loaded 6in driver. The 6in performed well down to 200hz but lacks a bit of Goto's "snap" on the upper frequencies (it is crossed at 1.2khz). So after a while we came up with the idea of using a 6th channel to bridge the gap (200-400hz) between midbass and Goto.
The advantages of adding a 6th channel and vertical horn rack are:1) Vertical alignment for all drivers above 200hz (or lower if possible)2) Bridging the 200-400hz gap3) Bridging the perceived "speed" difference between 11" cone midbass driver and 2" diaphragm Goto driver4) Since Goto driver has a very small throat it would be best to use a shorter tractrix horn (around 250hz) to keep throat/mouth difference smaller and crossover at around 400hz (maybe 500hz, but need to listen first)5) Coupling the 6th channel to the floor in order to achieve greater bandwidth for our vertical column (120hz tractrix is the biggest we can go while keeping the mid range at ear level) .6) Improved imaging and sound stage (hopefully) 7) A clean look... yes, the Macondo is sexy Smile
I might have missed some info here and there but that's the jest of it.  
Best Regards,Keith
08-25-2011 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,540
Joined on 05-28-2004

Post #: 102
Post ID: 16863
Reply to: 16862
More “perceived speed"?
fiogf49gjkf0d
 Kcct82 wrote:
Bridging the 200-400hz gap3) Bridging the perceived "speed" difference between 11" cone midbass driver and 2" diaphragm Goto driver…..
I do not know how you drive the things but if you have spare power at the amp the drives your 11" cone midbass then you might try to reduce loading of this 11" cone midbass. As you begin to more idle the amp it will give to you more “perceived speed"…

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
11-02-2011 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,540
Joined on 05-28-2004

Post #: 103
Post ID: 17278
Reply to: 8048
There are a lot of Goto out there.
fiogf49gjkf0d

I do not know if it was because economy, because the Japanese events early on this year or because any other reasons but there is a lot of Goto drivers for the last couple months on used market. The prices go down and it looks like nowadays the Goto MF drivers are in the same pries range with good JBL drivers – how it shall be. So, if somebody would like to experiment with Goto drivers then I think nowadays is a good time to grab some of them out there.

I have an interest to try them but my interest is not high enough to commit myself to the experiments. I have the same attitude with toward to new GIP, or some older RCA or Klangfilm drivers - it might be an interesting parley but I have no specific itch or acute needs to go there. Still, if somebody is interested in the Gotos then inform you that there are plenty of them nowadays are flying around.

Rgs, Romy the caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
04-16-2012 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,540
Joined on 05-28-2004

Post #: 104
Post ID: 18069
Reply to: 8048
Goto 146 woofers.
fiogf49gjkf0d

I just got an email from a site visitor that there is a pair of one year old GOTO 146 woofers floating in Japanese Yahoo.

http://page13.auctions.yahoo.co.jp/jp/auction/r89074657

The price is $8.5K whoever would like to try them be my guest.  I do have a long-term objective to try them sometime but to accommodate my horns to use them will be a huge pain in ass. I also have no idea how to moderate resonance frequency in those drivers and the people who make/sell then have no idea what resonance frequency is. So, I guess until somebody demonstrates me an interesting bass from those Goto compression drivers I will be sitting on a fence. If anyone would like to bite this Goto deal then let me know about the result and the most important – the application it was used in as I envision no application for them.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
05-11-2012 Post does not mapped to Knowledge Tree
Serge


Russia
Posts 51
Joined on 09-21-2009

Post #: 105
Post ID: 18169
Reply to: 18069
European GOTO prices
fiogf49gjkf0d
I may be repeating someonelses's post but here
http://audio-life.nl/sites/default/files/goto-prijslijst-audio-life.pdf
http://audio-life.nl/sites/default/files/goto-unit-specifications.pdf

you'll find EU prices and specs for GOTO drive units and horns.



http://hifiblog.livejournal.com/
05-11-2012 Post does not mapped to Knowledge Tree
Jorge
Austin TX
Posts 137
Joined on 10-17-2010

Post #: 106
Post ID: 18170
Reply to: 18169
Pair
fiogf49gjkf0d
Are the prices per pair o for each unit?

05-12-2012 Post does not mapped to Knowledge Tree
twogoodears


Italy
Posts 116
Joined on 03-26-2008

Post #: 107
Post ID: 18172
Reply to: 18170
Goto's price list
fiogf49gjkf0d
It's singles price-tags...


"Use your ears as your eyes" - Gertrude Stein

Stefano
07-13-2013 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,540
Joined on 05-28-2004

Post #: 108
Post ID: 19682
Reply to: 8048
GOTO get time-aligned help.... Eventualy!!!
fiogf49gjkf0d
http://twogoodears.blogspot.com/2013/07/sum-goto-unit-usa-nice-marriage.html


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
Page 5 of 5 (108 items) Select Pages:  « 1 2 3 4 5
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  The “Dead Points of Live Sound”..  Confused...  Playback Listening  Forum     28  208604  05-14-2005
  »  New  Macondo's Axioms: Horn-loaded acoustic systems..  No wonder...  Horn-Loaded Speakers Forum     72  403940  07-29-2007
  »  New  Eventually - a reasonable midbass horn from GOTO..  Clever DIY going on where?...  Horn-Loaded Speakers Forum     97  884656  11-19-2007
  »  New  8" Goto Woofer for 60Hz Horn..  It's not a Goto 8in driver...  Horn-Loaded Speakers Forum     5  61063  11-03-2008
  »  New  The tapped horns: cons, pros and Sound..  Sorry, no images any more....  Horn-Loaded Speakers Forum     56  483865  04-23-2009
  »  New  Midbass Horns and Real Estate...  Just a youtube video......  Horn-Loaded Speakers Forum     247  1503235  07-26-2009
  »  New  Why GOTO do not care about time-alignment...  Sarcasm isn't my cup of tea...  Audio News Forum     7  39838  09-22-2009
  »  New  Audio-tekne's "Tone Quality Improvement technique&..  Crooked glasses...  Horn-Loaded Speakers Forum     9  56764  10-10-2009
  »  New  The 5-ways from Germany...  Another Kid?...  Horn-Loaded Speakers Forum     38  126487  12-06-2009
  »  New  Configuration from Italy: multisell++ and double model ..  In search of optimum.......  Horn-Loaded Speakers Forum     8  64828  01-02-2010
  »  New  Multi-amping crossovering...  No input capacitor......  Audio Discussions  Forum     6  42140  09-24-2010
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