***Official HSU owners/support thread!*** - Page 194

of course possibly down the road I might do dual subs. if so 2 15's may be too much?

If it's too loud just turn it down. Better to have too much and not need it...

If it's too loud just turn it down. Better to have too much and not need it...

If it's too loud just turn it down. Better to have too much and not need it...

If it's too loud just turn it down. Better to have too much and not need it...

Sorry for the multipost. Phone was on fumes trying to send that before it died:/

Joined the club over the holidays. Picked up a VTF-2 MK4 Hooking it up today.

Dr.
Here is a pic of my setup and I'm just curious if I picked a good spot for my VTF3 MK4. I noticed some people said they put it between the front right channel and the center channel. What do you think?



Here is what the whole room looks like

Welcome to the Hsu family! Do post your room layout so we can make placement suggestions.

Placing the sub 1/3 from one side wall can potentially give a smoother response. Since the sub is lower than the bottom of your screen, you can certainly give that a try.

Very nice looking room!

Thanks Doc, I'll give it a try. Happy Holidays!

New to the club, just ordered 2 x VTF-3MK4 for my 14' x 17' theater. Maybe a bit of over kill for the room size, but If I move and build a larger theater I won't need new subs.

I purchased 2 12' velodyne EQ max's on boxing day for giggles, but they are going back as soon as my HSU's arrive.

I will be running these with my Monitor Audio RS6's and BRFX surrounds with a denon 4311CI.

Can't wait.

Welcome to the family. I would order another 15H but I don't think my delivery guy has gotten over his hernia yet....lol.

I just got done reading the audioholics review of the 15H (both reviews). All I can say is I do not trust that website any longer for professional reviews. The person who did the review was completely unprofessional and constantly gloating about his 20 years of experience in building subwoofers. Now after reading the sub shootout here on the AVS forum, I believe those guys nailed it. I still want the 15H. Of what they said about the 15H kind of resembles the VTF3 MK4 as in SPL aren't high but something about the sub moves you more than others.

Welcome to the Hsu family!

I'm a generation behind: still rockin my HSU VTF3-MK3! Having said that, I am a bit of a hypochondriac regarding my home theater gear and had a couple questions. Ultimately I'm hoping someone will pat me on the head and let me know I'm hearing normal amp/possibly EMI noise so my perfectionism won't incite any more paranoia . Firstly: I'm getting plenty of awesome output from my sub, however, I've always had a weird hum from it. Thought it was ground loop from another source or the receiver itself, but unplugging the sub cable from the AVR but leaving it in the plate amp, still have a hum. Switched out multiple cables, including a quad shield RG 6 from monoprice. I also get the hum if I have just have an F-Type RCA adapter plug in (without a cable). The hum isn't overwhelming, but is audible to an active listenter. Without anything plugged in at all the amp is silent when turned on. I ignored it for a bit as I was getting good output and shelved it as EMI. Now recently I've noticed a very quiet static as I adjust the Gain. Not loud, but noticeable. Is my amp wiggin out, or am I being too paranoid about normal aging amplifier?

From the sound of it, it still sounds like ground loop hum. I had the same issue for a very long time with mine. It drove me nuts. If you do not hear the hum when you turn the volume up with only the power cable plugged in than it does have something to do with your electronic components. If you hear it while only the power is plugged in and you increase the gain, the the feedback is coming from your outlet and most likely your power system.

For me what caused it was the Coax cable in my system that I used for Internet. When the Coax cable was plugged in to any part of my system I got a feedback loop hum. It was driving me absolutely nuts and took me months to figure it out. I too tried disconnecting everything on the receiver and only having the Sub plugged in. I even tried in wall wiring (that I installed previously) vs direct cable connection and it still happened. If any audio cable was anywhere near the coax cable for my Cable internet the hum started again. If I had anything in my connected to the router that was connected to the cable modem I got the feedback loop. Even after I cancelled my subscription to cable Internet I still had the same issue. In fact if I even had anything plugged into the same electrical circuit as the cable modem that I the Internet coax plugged into I would get the feedback hum. The issue did not go away until I disconnected the cable from the house's main junction box in the basement of my home, then it was finally gone to never be had again. The hum you get from a feedback loop can be one tiny connection and travel in very odd patterns. It is kind of crazy to think of it.

If I had not experienced it myself I would honestly not believe that a single Coax connection from the Cable company could cause so many issues and on so many different fronts. It sounds doubtful that you have any issues with your subwoofer from your testing but it definitely sounds like a feedback loop. The amps in these subs are really sensitive, which is a good thing, and can easily pick up on the tiniest feedback.

Good luck in finding the source.

Its not overkill. I have a similar sized room and I have a VTF2MK3 and a VTF3MK2 with an amp for a VTF3MK4 in it. Not overkill at all. It *does* rock the whole damn house though

That's reassuring. As long as its not my amp freaking out Thank you! One quick question, did you get a hum even when you had the coax cable plugged in to the subwoofer only and have it turned on? Meaning I get the hum with: Receiver->Interconnect->Subwoofer On (Plugged in wall) but I also get the hum with Subwoofer On (plugged in wall) ->Interconnect, without the Receiver anywhere near the subwoofer or the interconnect, just an interconnect cable dangling out of the subwoofer going to nowhere. Alternatively, with the subwoofer plugged in, and absolutely no cable connected to the LFE IN on the subwoofer (Subwoofer+Power cord only) I do Not get the hum. That's whats weird to me.... Its acting like anything I plug into the subwoofer is an Antenna for EMI, but I've tried many many shielded cables of various lengths and can't seem to find one that eliminates it? Could it still be a ground loop and I'm not understanding the mechanics behind it? The HSU unit has a cheater plug (no ground) that comes standard with it? Thanks so much for your help guys! Also the minor static coming from adjusting the gain on the subwoofer directly?

I get no static. If youre getting static when adjusting the gain (aka volume), you should unscrew the 12 screws for the amp on the sub, pull it out, and double check the spade connection to the sub itself. You could have a loose connection. Just reseat the spades.

Think that could account for the weird humming?
Thanks so much!

It *could*. Its just something to check. I know on my VTF3MK2 I started getting (trying to find the right word here) buzzing? Humming? Rattle? Some mix of all those 3 words...after careful examination, it turned out the negative connector on the sub was a bit loose. I could literally move the spade (female side) on the male side and re-create the noise. I simply reattached it to the other spade, and my problem went away.

Question for you all. Ive got two subs. A VTF2MK3 and a VTF3MK2. Im running 5.2 for my system. Due to mostly aesthetics and my OCD nature of wanting to be balanced, Ive got my 2 subs on my front wall as pictured here:



Now, if you look at my caveman-like scratch paint drawing, Im considering moving the front right sub to right behind the sectional (the red boxes indicate my idea). If you look at my drawing, the half wall is a 4 foot tall barrier between the family room and the kitchen. Total length of the entire area is about 45 feet, width is about 16 feet. That half wall actually is reflecting more bass than I imagined it would, thus putting my primary seating fairly close to the center of the room. Thus, Im in a bit of a null. Ive done a sub crawl, and actually the front left corner was the second best placement, the first being right at my sliding glass door in the corner of sorts on the half wall. I cant put a sub there because of access issues getting to the back porch. As it sits now Im really not completely UNsatisfied with my bass. Its pretty flat, solid, and hits. But if I were to stand in that semi-corner at the half wall and the sliding glass door, there is a noticeable difference, both in db and in clarity. In an effort to eliminate that null, Im thinking of putting the VTF2MK3 currently in the front right side right behind the sectional.

Currently I have both subs gain matched at 85db. The VTF2MK3 is running with 2 ports open, the VTF3MK2 (which just had an amp upgrade to a VTF3MK4 amp) is running with one port open, Qcontrol set at .4, and EQ set at 2 (Ported Max Headroom Mode).

What say all of you? Dr Hsu?

I generally do not like having one sub up front and one behind and both handling the same frequency range. You can try both subs directly behind the sofa as well.

An open ended RCA cable can be very good at picking up hum. As long as you get no hum with no interconnect connected, the sub itself should be fine.

Both subs behind the sofa wont be an option.

So in this case you think theyre good where they are?

Your current setup should be great, but by all means give your idea a try.

. I love you! ....I would die inside if my precious MK3 had an ounce of sickness. One thing though. As to that bit of static on subwoofer gain adjustment sans RCA cable? I don't want to touch its guts if you think she's fine. But would check for looseness as recommended by blackangst.

Couple of days at the cabin + Hsu Hybrid 3 = HEAVEN

If those ripples on the water were caused by the sub in your cabin, that is quite impressive...