***Official HSU owners/support thread!*** - Page 164

Originally Posted by dr_hsu

Oh, well. Next time come over when I am here...

Oh yes. You don't get the heaving floor effect on a concrete floor, even when you have it real loud! Our demo room is solid concrete.. and still one 15H with volume barely past minimum.

Originally Posted by jsgrise

Is that with a flat frequency response? or a 18-20Hz peak?

Originally Posted by dr_hsu

In our room, we have lots of low end gain, so we have the 15H set to two ports open, EQ2, and Q=0.6, volume nearly at minimum. With that setting, its flat down to 16 Hz. If we set it to one port open, EQ1, Q=0.7, 16 Hz will be up by more than 10 dB.

Originally Posted by jsgrise

I envy you a lot!!! Since my room is short (17'), I have a big peak at 33Hz (+10dB) that make the bass sound boomy without Eq. I wish I had that much output in the ULF...

Originally Posted by dr_hsu

I am doing fine. Can you post a detailed layout of your space? Are there openings that stay open leading to other areas of the house? If so, please sketch the adjoining ares in as well. Dimensions of adjoining areas too. That way I can give more specific placement recommendations.

Without further information, I would say go for a VTF-15H. That is quite a large space for a single ULS. Although the ULS is better for music, the 15H in a big space is much better for HT.

How far (measuring from your ear) is the second row seating from the front wall? Back wall? Ditto for first row seats.

Originally Posted by jsgrise

Most of the time I run it 1port EQ1, but I sometime switch it to EQ2 and with two ports open. I usually keep the Q at 0.3



Unfortunately I'll be in LA from the 21st to the 28th. But I'm sure guys like Pete and Ryan will take good care of me, as usual



Are you on a wood floor, carpet over wood or carpet over concrete? I am carpet over concrete and by experience, it does take a lot more power the get the same feeling on concrete...

Originally Posted by dr_hsu


Can you come Monday or Tuesday? I will be out of town from Wednesday through end of the following week (visiting my daughter at MIT during her Spring Break). You can see our setup in the demo room!

Originally Posted by jsgrise

I believe it, my friend vtf3.2 push more air a 9:00 and receiver -5dB than my 15H at 10:00 and receiver 0dB. There's is definitely something wrong with my room and maybe my receiver (RX-V1600)...

Originally Posted by oztech

I wonder if your friend will let you borrow his AVR it would help ruling out 1 item at a time.

Originally Posted by dr_hsu

Unfortunately not. Our vendor just raised the prices so we cannot keep our current pricing too long.

Originally Posted by dr_hsu

Certainly lighter to borrow the receiver, but more onerous since you have to disconnect a whole bunch of wires and remember where each wire goes.. both at your friend's house and yours (unless you are not like me and have every wire nicely labelled. ). The alternative is to borrow his 3.2, or if you want to build up your muscles, take your sub to his house

Originally Posted by Pinstripe

Any chance your front speakers are set to 'large'?

Originally Posted by oztech

I wonder if your friend will let you borrow his AVR it would help ruling out 1 item at a time.

Originally Posted by jsgrise

Could it be a bad amp? Is there a way to tell if the amp is defective?

Originally Posted by oztech

That was the reason for borrowing another AVR to rule it or the sub amp out. If you hook up another AVR and the bass comes to life then you know what you have to do and if no change then I would suspect the sub amp
although you may be the first reported on that model this forum.

Originally Posted by Pinstripe

jsgrise, first thing first - that is one BEAUTIFUL HT you have!

Second, tu est situer ou exactement au Quebec (est tu dans la ville de ou dans la province; je suis a Laval).

Third, dr. hsu, I have a 200w amp from another sub, could he disconnect the BASH and hook that up to test the sub some in some way?

Originally Posted by jsgrise

I would also be really surprise if it was the amp since I know HSU is well know for it's reliability. Could it also be because my speaker are very sensitive (97dB) and the sub may have a hard time keeping up so it need to be pushed harder the achieve the same spl level?



Thanks a lot! I'm on the south shore of MTL. I don't think running the 15H on another amp would be recommended... But thanks a lot for the offer!

Originally Posted by jsgrise

I believe it, my friend vtf3.2 push more air a 9:00 and receiver -5dB than my 15H at 10:00 and receiver 0dB. There's is definitely something wrong with my room and maybe my receiver (RX-V1600)...

Originally Posted by oztech

I doubt your mains play a role in it unless you play at some really loud levels of course if you have a db meter what is your listening level where you set.
There is another poster having an issue after he upgraded to another AVR
ne went from Onkyo to Yamaha and is not happy with the sub output.
What have you set the crossover to the mains at although room correction does a lot of nice things sometimes it will set the mains to large and the crossover below 60Hz which IMO is just wrong they need further refinement.
I have no problem filling my rooms (they are open to each other ) with the 15H using an Integra 10.5 (ancient) so I suspect a setting in RC or the AVR
itself.

Originally Posted by oztech

What receiver is your friend using?
Are the rooms close in size and dimension?
Are the seating from the walls the same ?

Originally Posted by jsgrise

My crossover is set manually at 80Hz and I make sure to select "SKIP" on the YPAO speaker size option.



My friend is using a Marantz SR6006 with MultEQ XT. The total volume is comparable but the dimensions are pretty different.

Originally Posted by oztech

My reason for dimension and seating if you are setting in a null no sub will help overcome this but if all you did was replace equipment and nothing else changed then a setting are faulty equipment will be the blame. The 15 will have more of everything so you should have noticed an immediate difference.

Originally Posted by jsgrise

I think I need a new RC like XT32... Upgraditis strikes again :roll eyes:

Originally Posted by jsgrise

My crossover is set manually at 80Hz and I make sure to select "SKIP" on the YPAO speaker size option.



My friend is using a Marantz SR6006 with MultEQ XT. The total volume is comparable but the dimensions are pretty different.

Originally Posted by fcastle

Dr. Hsu,

Do you have a time frame for the increase in prices? After much research, I have decided on a 15H but will not be able to order one until very late this month due to being on vacation.

I currently own an STF-2 which I am moving to my second home - it has been an awesome sub for 7 years but it is time to upgrade my primary HT!

Thanks for the great subs!

Pete

Originally Posted by jsgrise

I would also be really surprise if it was the amp since I know HSU is well know for it's reliability. Could it also be because my speaker are very sensitive (97dB) and the sub may have a hard time keeping up so it need to be pushed harder the achieve the same spl level?



Thanks a lot! I'm on the south shore of MTL. I don't think running the 15H on another amp would be recommended... But thanks a lot for the offer!

Originally Posted by Kevin12586

Have you run a frequency response for your room? This would be one way to find out if you are indeed sitting in a null.

Originally Posted by dr_hsu

Nice house! What are the dimensions of the room? Remember to draw a sketch with dimensions. Do you usually listen with the door to the bedroom open? I would try closing the door to the bedroom when listening, and place the 15H behind your sofa. If you have sufficient space, place the sub so the woofer fires directly into the back of the sofa. Place it right behind your favorite spot. Do you have it as an end table now, or behind the sofa?

Yes, if your main speakers are 97 dB efficient, then the subwoofer level would need to be set higher to match it's sensitivity.

Originally Posted by dr_hsu

I think we can hold off any price increase till then.

Originally Posted by Kevin12586

Have you run a frequency response for your room? This would be one way to find out if you are indeed sitting in a null.

Originally Posted by jsgrise

Thanks Dr. Hsu! I'll draw the diagram as soon as I have 5 mins (working all day).

I played with my 15H and SMS-1 this morning and I placed my HSU in the corner behind the couch. The couch is now about 38% from the back wall of the total room length (17'). I also played with the sub distance on the AVR. I had the max SPL around 80Hz with a 10' distance (YPAO settings), but made the bass sound buzzing around this frequency. In Transformers (chapter 8 - Scorpion Attack), the sound of the jet planes machine gun made a weird BBBBZZZZZBBZBBZBZBBZBZBZ. It sounded stressed out.

I adjusted the AVR sub distance back to 4.5', which is the physical distance of the sub from the LP and the bass was much more cleaner and seemed to have more extension... Although I don't know if this is just in my head... The same machine guns sounded more natural TRBTRBTRBTRTRBTRBTRBTRBTRBTTRBTRBTRBT, If you know what I mean...

I know run the sub volume gain around 10 o'clock.

I also tried the sub behind the couch firing into the LP. It sure shake the hell out of the couch but didn't give me the extension I like. It didn't sound as smooth too, but a lot more brutal... When Ironhide transformed, it felt like if someone was hitting me with a sledge hammer! It was not as melodic though...