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In the Forum: Horn-Loaded Speakers
In the Thread: Eventually - a reasonable midbass horn from GOTO
Post Subject: Goto philosophy of linear range...Posted by Jeffrey Jackson on: 11/24/2007
Hello again, Romy...
I totally agree with you about changing the rear chamber volume. It makes a very positive improvement in extension as well as quality. Also, I had never dreamed of a driver with a variable compliance resulting in a variable free air resonance... such a toy would be wonderful with custom midbass and bass horns...
but let me explain the GOTO philosophy on this... they do not care to get the last bit of extension from any horn driver combination... their entire philosophy is to design a horn driver combination for four octaves and use the middle two... the area where the impedance curve and frequency response are extremely linear... they do push the two octave portion slightly toward the flare frequency from the middle, but that is due mostly to their preference for long, slow flares..
following this line of thinking, Ming's horn is actually only about 4 dB down at 60 and approximately flat at 75Hz... this could only happen with the long, slow flare... I bet if we asked GOTO, they would say cross at 90 Hz...
I have spent much time listening to these types of horns as well as thinking hard about the philosophy.... to me, when it comes to home reproduction, this type of thinking leads to not being able to horn load the bass as low as I would like... I would rather have the extra extension and not have to bring a direct radiator into the equation... in the home horn environment, which I truly believe to be superior to all other forms of music reproduction, we must choose carefully to be able to physically place the best setups into our smaller environments... I value time alignment and the goto philosophy allows for bass horns, but not with time alignment... they believe in throwing away that last half octave, at least...
I still would like to say that their drivers, with their extremely strong magnetic assemblies,ultra light and stiff diaphragms, and small exit diameters allow for the potenetial to be the best low mid, and possibly bass drivers currently available... if you would like, I will keep you informed on my horn experiments with these drivers... I have a pair of the 370's (400 to 18k) and 505's (100 to 6k)...
Peace,
Me
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