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Kcct82 wrote:

On to other things... now that we've been using the GOTO SG505 for a while, the verdict is that it does not sound good below 290hz.

As I understand you use the GOTO SG505 in 150Hz horn and report that it does not sound good below 290Hz. If so then it would be interesting to know what was wrong specifically with sound.

There are only 2 reasons why it does not sound good: problem with horn and problem with driver. You might test them independently buy I do not thing that it is the drivers but rather wrong driver for a wrong horn as I feel that got is kind of damn about it. 

What high-pass filter you use? Although the GOTO’s Ming said that GOTO recommend using first order crossovers but I presume that they begin to do it after reading and learning from this site as few years back.  Formerly GOTO insisted to use 4th order only and it frankly might be for good reasons – theirs drivers are too generic and nonspecific. My perception of proximity of crossover point to the horns’ rates based upon relatively fast opening horns. GOTO horns open very slow and the slow-opening horn might need 1-2 octaves at the bottom in order do not have the “boom”. Here is where the GOTO demands for 4th order came from.  In the following post:

http://www.goodsoundclub.com/GetPost.aspx?PostID=8750

Ming Su, as an official GOTO rep, put GOTO drivers into 1-st order camp. It is very god in my view as the 1-st order is the way how it must  be done but the system shell be designed and thought out initially to be able to work within 1-st order. GOTO were not thinking in context of first order to begin with, the park of their drivers, their horns are a clear indication that GOTO allays were minded about high-order crossovering system. So, what Ming Su said sound sexy for the ears of cogent horn aficionados but it might be not supported by the GOTO products. I do not think that what Ming had any sinister intend. To state that GOTO is “1-order comply” system sounds good (particularly fro the reads of this site), it is might be even something that GOTO people begin to believe in themselves. However, I think that looking in the way in which they sliced the audio range among the drivers and the characteristic of the drivers themselves I presume that they had very high order in their minds.

So, if GOTO SG505 in 150Hz horn does not sound well 290Hz then I would sharpen the filter and to see if it get better. Most likely the slow opening of the GOTO horn with it’s long pipe get too much saturated with extensive for the given profile LF.  It is highly possible that the legend of “slow opening horns has better bass” might derived expectedly from this misperception: people might recognize the choking sound of the slow opening horns as “more bass” from horns.

If you more describe in your own words the specifics of the sound below 290Hz then it would help identify if my assumption is “hot” or “cold”.

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