Rerurn to Romy the Cat's Site
In the Forum: Audio For Dummies â„¢
In the Thread: Goto SG-370DX measurement
Post Subject: Goto SG-370DX measurementPosted by Daniel on: 3/11/2018
Hi,
this is my first post. This forum seems to be the hotbed for Goto discussion of some sort but there is barely any data but only a swamp of assumptions. So I bought a pair of SG-370DX drivers with S600 horns and measured them. Here's the frequency sweep from 500Hz to 25kHz:
Impedance is basically a flat line at 14 Ohm.
Before doing the sweep I did a quick impedance check with my LCR meter at 100 Hz, 1k, 10k and 100k. What I heard at 100, 1k and 10k without the Goto horn sounded very, very clear and clean. Ok, every driver sounds clean and clear with a sine wave on it unless it's not damaged. But even under that condition the 370 stood out. I then screwed on the horn and listened to 1k and 10k sine waves from the LCR meter (a simple Agilent U1733C) and noticed that something was distinctly "off" compared to the sound without horn. It's hard to describe what it was, kind of like a ringing metal horn, old Altec without damping applied. The clean and clear was gone. The Goto horn is very well damped and doesn't ring at all.
I haven't listened to any music yet as I don't feel a passion to hack something together just now but will make an adapter to attach the driver to another horn (Autotech Iwata 300 and 600) and see what that gives.
My drivers come with no supporting data from the manufacturer, not even a nominal impedance on the label.
Rerurn to Romy the Cat's Site