אין כאן וויכוח עם הגיון כזה או אחר ואני לא מבין גדול. העובדה היא שבכל מקום שקראתי, אם זה אנשים שסאבוופרים זו הפרנסה שלהם, ואם זה חובבים/מומחים, הם תמיד מציעים מה שכתבתי אבל אולי לא הבנתי נכון והם אומרים את אותו הדבר שהם אומרים בצורה אחרת. גם SVS וגם Rythmik נותנים את ההנחיות האלו לכיול, לא בדקתי חברות אחרות.
הנה ציטוט מPDF של Rythmik:
b. Run the Room EQ per the AVR instructions.
Note: if you will be running the subwoofer real “hot”, substitute -11dB for -6dB in the steps below...but you probably shouldn’t until you know what you’re doing and are comfortable with the process.
Adjust the Volume (Gain) setting on the subwoofer until an approx. -6dB (or -11dB) level setting for the subwoofer is obtained by the Room EQ in the AVR. Remember this is counter-intuitive, if the gain on the subwoofer is set too high, the Room EQ tool will provide an appropriate signal that will produce a 75dB level (this will correspond to 0 (zero) on the MV), so you will see negative trim number in the AVR. If the Volume (Gain) on the subwoofer is too low, the Room EQ tool will provide a positive trim number inorder to bump up the signal to produce the 75dB level
.
ומהאתר של SVS:
AVR: For connection to an A/V receiver, it should normally be set between -15 and -5 (depending on the room size and strength of the AVR sub-out signal) prior to running auto-set-up.
The desired AVR subwoofer channel level after running auto-set-up is in the -8 to -4 range (typically on a scale of -12 to +12).
If the post-set-up AVR subwoofer channel level is bottomed out at the minimum setting (usually -12), that means the subwoofer volume was set too high. Reduce the subwoofer volume accordingly and re-run set-up. If the post-set-up AVR subwoofer channel level is in the positive region, that means the subwoofer volume was set too low. Increase the subwoofer volume accordingly and re-run set-up.