STF-3 + turbocharger + amp mod = dark horse?

[Michael Bain]

Doesn't it appear that an STF-3 + turbocharger + amp mod for 18Hz response will be a dark horse?

Those guys with the STF-3 maximum extension versions will not even need to modify anything.

These things should coast through virtually anything thrown their way. Who would have thunk it.

[Ddavidson]

Hsu has already stated that the process for upgrading the STF amp from the standard 25 Hz to 18 Hz is a relatively simple process. So with both ports fully open and still flat down to 18 Hz it will be a very attractive deal. Those who already have an STF-3 with the factory 18 Hz amp mod (using a permanent port plug) will be able to easily attach the turbo and put the port plug away.

Ddavidson

[Michael Bain]

The STF-3 turbo owners should sell the port plug. Some other people with different subs might need it :D

[Steve nn]

The STF-3 turbo owners should sell the port plug. Some other people with different subs might need it http://www.hsuresearch.com/forum/images/smilies/biggrin.gif

Now that's funny!:p Mine came with 2.:)

[Ddavidson]

Now that's funny! Mine came with 2.
Sealed STF-3 !! http://www.hsuresearch.com/forum/images/smilies/biggrin.gif


Ddavidson

[Steve nn]

Sealed STF-3 !! http://www.hsuresearch.com/forum/images/smilies/biggrin.gif


Ddavidson

http://i3.photobucket.com/albums/y75/stevenn/000_0026.jpg

http://www.hsuresearch.com/forum/images/smilies/biggrin.gif http://www.hsuresearch.com/forum/images/smilies/redface.gif YIP! STF Alright!http://www.hsuresearch.com/forum/images/smilies/biggrin.gif

[Michael Bain]

I wonder where they got "variable tuning" idea from? :D ;)

Can't wait to see a VTF-3HO compared to that thing by a guy like Howard Ferstler or Keele. Dual 4" ports w/ huge flares in 18Hz mode. Turbo time.

[craigsub]

I wonder where they got "variable tuning" idea from? :D ;)

Can't wait to see a VTF-3HO compared to that thing by a guy like Howard Ferstler or Keele. Dual 4" ports w/ huge flares in 18Hz mode. Turbo time.

Electrovoice with the Interface D's, perhaps ?... circa 1977

And Steve - Behave yourself. :rolleyes:

[Steve nn]

I wonder where they got "variable tuning" idea from? :D ;)

Can't wait to see a VTF-3HO compared to that thing by a guy like Howard Ferstler or Keele. Dual 4" ports w/ huge flares in 18Hz mode. Turbo time.


>>>I wonder where they got "variable tuning" idea from?<<<

I cant seem to remember myself?:o

>>>And Steve - Behave yourself. :rolleyes:<<<

Mmmmm........Ok;)

[Ddavidson]

Steve that is a solution if you just want special effects played loud, or want to dB drag race the next door neigbours 18 yr olds kids. Of course you can build a better performing DIY option for that sort money if your not into luxury finishes. Although I do understand that some might prefer the nice looking cabinet from Sound Art Chinas factory.

Buyers here tend to listen to music as a reference and such a subwoofer would be consistantly being turned off for the excessive overhang and bloated bass presentation. It would ruin the whole reason for listening to our favorite music. Of course bass is subjective as I keep telling people, and you may like your bass like that which is fine (its your money).

Blowing up the world may be something you might use as "reference material" but such things only mean something if your reference, judge and executioner is just an SPL meter. Its clear to anyone reading the sales blurbs that is how they are marketed and sold, and that is their target market. SPL drag racing results are obviously important boasting material to some buyers.

However the brain dead groupie comments that you see on forums promoted by such solutions of "how loud does she play" just are not of any interest to many people around here.

Nice cabinet however. Although he prefers a clean sheet of paper rather than fixing a bad design, perhaps a gifted designer such as Dr Hsu may be able to offer some suggestions on how to get it to sound a little more balanced and listenable?

Then again it may be easier if you want to play and listen to music just to buy a Hsu and be done with it. At least it works out of the box.

PS: Try three port plugs in the ports "it might" tighten it up a bit.

Ddavidson

[Pete_Hsu]

Gentlemen,

Please stop the back and forth, immediately.

Let's try to get back on subject. (nice looking pic, by the way, steve)

Thank you!

Sincerely,

[craigsub]

Doesn't it appear that an STF-3 + turbocharger + amp mod for 18Hz response will be a dark horse?

Those guys with the STF-3 maximum extension versions will not even need to modify anything.

These things should coast through virtually anything thrown their way. Who would have thunk it.

To answer this question with some science behind it - The Turbo concept is actually not a difficult one. The hardest job will be to make exterior ports which will look good with the original unit. Not too many wives will allow an extra 12 inches of "pipes" to stick out of a subwoofer.

Some of the pro-audio subwoofers we have put into dance clubs have triple 6 inch ports ... and for the purpose of really shaking the floor, we can pop out an internal 30 inch port, and pop in a 54 inch port, lowering the tuning frequency from the mid 30's to the low 20's. PVC is a wonderful thing.

The STF-3, with one port closed, will generate 7-12 dB in higher SPL's from 16 to 22 Hz than it will with both ports open, at the cost of higher frequency SPL's ... with the Turbo option, it should get that extra deep bass power without the sacrifice in upper bass.

Assuming the turbo option is made affordable, which seems likely, twin STF-3's with the turbo will be quite formidable. Kinda makes you wonder what four would do in a room.

[Pete_Hsu]

Good day Craig!

I believe that most people will be pleased with the general appearance of the turbocharger, but it is true that some wives in particular may not be too pleased :) The beauty of the turbocharger is that it should be able to be easily removed when not in use. Turbo will generally only be needed for the most demanding users to use on the most demand scores. So with our box subs, one will have an end table by day, a low bass champion by night, and an endtable just in time for morning coffee the next day!

The turbo pipes themselves will be housed in a clean looking box that sits on top of the subwoofer. So the only thing one should see at the listening position is two flared front-firing ports.

Thank you for adding your two cents, Craig!

Sincerely,

[craigsub]

Good day Craig!

I believe that most people will be pleased with the general appearance of the turbocharger, but it is true that some wives in particular may not be too pleased :) The beauty of the turbocharger is that it should be able to be easily removed when not in use. So with our box subs, one will have an end table by day, and low bass champion by night, and an endtable just in time for morning coffee!

Thank you for adding your two cents, Craig!

Sincerely,

Peter - That makes a LOT of sense. Being able to easily "plug in" and "plug out" the Turbo unit will make a LOT of bass lovers happy, because "WAF" will be served. The real genius behind this is NOT the Psychics, that is child's play for Dr. Hsu - The ease of use will be the genius. Well - That and the amp mod required for proper EQ.

[Pete_Hsu]

Thank you Craig, I am sure that Dr. Hsu would be humbled by your comments!

The amp mod is a piece of cake, just one resistor.

[Lwang]

Don't I get credit for having the first Variable-Variable-Tuning Hsu?
http://www.airflo.co.nz/Images/flexitube.jpg

[craigsub]

Don't I get credit for having the first Variable-Variable-Tuning Hsu?
http://www.airflo.co.nz/Images/flexitube.jpg

You are right - That port extender was used for Fred's home theater in "The Flintstones" ... ;) You DID patent it, didn't you?

[Lwang]

If Fred was using it, then he had me beat by around 100 million years.

[Steve nn]

Steve that is a solution if you just want special effects played loud, or want to dB drag race the next door neigbours 18 yr olds kids. Of course you can build a better performing DIY option for that sort money if your not into luxury finishes. Although I do understand that some might prefer the nice looking cabinet from Sound Art Chinas factory.
__________________________________________________ __________

I wonder why you say that? Your certainly entitled to your opinion, but I cant say I entertain the same thought. I always consider SPL part of the equation. HSU is a respected sub manufacturer and I can guarantee you SPL play's a part in the esteem that they enjoy. I wont comment on the 18 yr old statement.


>>>Buyers here tend to listen to music as a reference and such a subwoofer would be consistantly being turned off for the excessive overhang and bloated bass presentation. It would ruin the whole reason for listening to our favorite music. Of course bass is subjective as I keep telling people, and you may like your bass like that which is fine (its your money).<<<


I'm absolutely stumped. Not much I can say to that with out getting defensive. I will say in comparing the ACI Maestro to the PB12-Ultra/2... I found them both very articulate and controlled and I'm sure I would find the same with HSU. I know from the many listeners that have experienced both options (HSU/SVS) that your prior statement doesn't hold true imo. Both HSU and SVS put out the real-meal-deal as far as I'm concerned.

>>>Blowing up the world may be something you might use as "reference material" but such things only mean something if your reference, judge and executioner is just an SPL meter. Its clear to anyone reading the sales blurbs that is how they are marketed and sold, and that is their target market. SPL drag racing results are obviously important boasting material to some buyers.<<<

With some buyers it most certainly is... and then with some> (but not at the expense of SQ). Nothing to be ashamed of there. Maybe it's kind of akin to "I want my cake and eat it to"? From the many reviews I've read regarding HSU, I don't see SPL (like mentioned prior) not playing a part in the process.

>>>However the brain dead groupie comments that you see on forums promoted by such solutions of "how loud does she play" just are not of any interest to many people around here.<<<

I can relate. Jargon is a sad part of the Forums at times. Good people seem to loose their composer and agendas are more important than a healthy discussion.

>>>PS: Try three port plugs in the ports "it might" tighten it up a bit.<<<


Your killing me I tell yeah!http://www.hsuresearch.com/forum/images/smilies/smile.gif You know what you know I guess. Well that's what I tell myself anyway.
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>>>nice looking pic, by the way, steve<<<

Thanks Peter. I honestly posted it in fun. I'm always interested in what HSU is up to and look forward to your new debut. I'm sure it will be well received and rightly so. Maybe I'll get lucky enough to hear one also?:cool:

[Pete_Hsu]

Dear Steve,

We would be honored to see you post impressions in the future on the new products!

Our customers have been looking for us to really push the envelope for some time now. We hope they will be thrilled with what we have in store for them :)

Sincerely,

[tgrisham]

Peter, can I assume that if the amp mod for the VTF-3R Mark 2 is just one resistor, and that it is possible for the user to modify the amp without sending it in? (Hypothetically speaking, of course!)

Thanks!

[Pete_Hsu]

Dear tgrisham,

Yes, in theory this should be a definite possibility!

Sincerely,

[sputnikv8]

Hsu has already stated that the process for upgrading the STF amp from the standard 25 Hz to 18 Hz is a relatively simple process. So with both ports fully open and still flat down to 18 Hz it will be a very attractive deal. Those who already have an STF-3 with the factory 18 Hz amp mod (using a permanent port plug) will be able to easily attach the turbo and put the port plug away.

Ddavidson

I'm trying to figure out "what" I have. I got one of the early max-extension STF-3's. It has one port plug in it. Does that mean I have the 18 Hz amp?

To add the turbo-charger, will I be removing that plug then?

(Just getting mentally prepped) :)

[Michael Bain]

Imagine how lucky you STF-3 ME guys are. All you need to do is buy the VTF-3 turbocharger, and put it in. Of course you must take out your other port plug first, but that's all.

[wid]

So does this mean the owners with the 25hz tuned Stf 3 will have to send the amp in to get it worked on ?