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Hey all,


I just got my vtf 3.3 turbo today, and after I had hooked it up, I ran test tones on my denon 989. When I did the subwoofer tone, I decided to see just how loud the sub could go. I slowly turned up the volume knob on the back of the sub from the lowest setting to pretty close to the highest setting (effectively rattling everything in my small kitchen about 14 feet away) and then all of a sudden the volume dropped dramatically. I panicked and spun the knob back down a bit and the sub jumped back up in volume again as if nothing happened.


So to fulfill my desire to learn more about my sub, what exactly happened here, and how should I actually be setting up my sub to achieve such awesome bass without the volume knob being in that "danger zone". Is it likely that I did any damage? I know the vtf 3.3 turbo is supposed to be extremely powerful and capable, so I think I'm missing something here as to how to optimize the sub's volume.
 

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I have a friend who I think has the same sub as you. When he spoke with HSU their recommendation was to keep the gain (volume) knob on the sub set no more than 1/2 the way up. I believe their recommendation was closer to 1/4 and to let the AVR adjust the levels.


You probably did not damage the sub. I believe they have some safety circuitry in them that shuts it down before damage occurs.


If you get erratic behavior from now on, I'd suggest calling HSU and getting their recommendation.
 

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Yes, the sub is probably fine and went into protect mode. Do not run with the sub gain no more than 10 o'clock on that sub! If you need more than that, get another sub.
 

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Quote:
Originally Posted by samsam7 /forum/post/15482540


Hey all,


I just got my vtf 3.3 turbo today, and after I had hooked it up, I ran test tones on my denon 989. When I did the subwoofer tone, I decided to see just how loud the sub could go. I slowly turned up the volume knob on the back of the sub from the lowest setting to pretty close to the highest setting (effectively rattling everything in my small kitchen about 14 feet away) and then all of a sudden the volume dropped dramatically. I panicked and spun the knob back down a bit and the sub jumped back up in volume again as if nothing happened.


So to fulfill my desire to learn more about my sub, what exactly happened here, and how should I actually be setting up my sub to achieve such awesome bass without the volume knob being in that "danger zone". Is it likely that I did any damage? I know the vtf 3.3 turbo is supposed to be extremely powerful and capable, so I think I'm missing something here as to how to optimize the sub's volume.

Boys and their toys! Set the sub gain at 9 and adjust the DB via the reciever pink tone and set it at 72 to 73 DB. All other speakers set to 75 DB. This will give you a flat setting across the board. If you want more bass from the LFE, then up the sub DB to your liking. However, if you go up too far, you will unbalance the other speakers for audio and will not get the full audio track as far as background sounds. This especaily happens with the center speaker.


Bill
 

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Quote:
Originally Posted by samsam7 /forum/post/15482540


Hey all,


I just got my vtf 3.3 turbo today, and after I had hooked it up, I ran test tones on my denon 989. When I did the subwoofer tone, I decided to see just how loud the sub could go. I slowly turned up the volume knob on the back of the sub from the lowest setting to pretty close to the highest setting (effectively rattling everything in my small kitchen about 14 feet away) and then all of a sudden the volume dropped dramatically. I panicked and spun the knob back down a bit and the sub jumped back up in volume again as if nothing happened.


So to fulfill my desire to learn more about my sub, what exactly happened here, and how should I actually be setting up my sub to achieve such awesome bass without the volume knob being in that "danger zone". Is it likely that I did any damage? I know the vtf 3.3 turbo is supposed to be extremely powerful and capable, so I think I'm missing something here as to how to optimize the sub's volume.

Boys and their toys! Set the sub gain at 9 and adjust the DB via the reciever pink tone and set it at 72 to 73 DB. All other speakers set to 75 DB. This will give you a flat setting across the board. If you want more bass from the LFE, then up the sub DB to your liking. However, if you go up too far, you will unbalance the other speakers for audio and will not get the full audio track as far as background sounds. This especaily happens with the center speaker. Added note: if your room is big (over 3500 cu feet) you might want to try the 3.3 without the turbo. I have two of them and run them without the turbo. Found that the DB has only a 1 DB differnece between turbo and no turbo and with my room I still get down to around 15 hz.


Bill
 

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There is no special setting for the volume control on your sub. The gain should be determined by setting the line level out to -5 on your receiver/pre pro, and then calibrating your system properly using test tones and an spl meter.


http://www.robbroy.net/HT/SubwooferErrors.cfm



Ian
 

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The gain on the Hsu is very sensitive. Like others have said set it to around 9 or 10 o clock. and then calibrate the level via a spl meter and your receiver level setting.
Many people just like to turn knobs all the way. Dont do this with The vtf3 m3. a lil twist can increase the level by a few db's.
 
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