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Super THT build thread - Page 6

post #151 of 243
Quote:
Originally Posted by superedge88 View Post

Looks like it is fixed. It turns out that the Dayton amp needs more signal power from the receiver, so all I had to do is go up to +5 dB on the receiver and adjusted the gain on the Dayton accordingly and now I have HUGE clean POWER!!! The THT is AMAZING!! I am so pleased and proud of this work of art. Can't wait to show it off! Thanks for everyone's help, especially you Bill!!!! I will update this thread once I do more work on the aesthetics of the sub.

Nice job Super! Glad you got it up and running!


dbl
post #152 of 243
Quote:
Originally Posted by Fatawan View Post

Ahhhhh--that makes sense. Your post says "this was an old setup, when I first fired up my THT in the middle of the room....

Here's the sub output with Audyssey OFF"
It didn't mention anything about sub line out from the receiver.


Damn....my bad....I have posted those graphs up so many times, I forgot to put line out....

JSS
post #153 of 243
Im way behind. Where are the plans for this sub? Any plan sheets out there?
post #154 of 243
Quote:
Originally Posted by goonstopher View Post

Im way behind. Where are the plans for this sub? Any plan sheets out there?

Do a search for Bill Fitzmaurice,sorry don't know how to post a link.
post #155 of 243
You think it would be reasonable to pay someone to make one for me?
post #156 of 243
Quote:
Originally Posted by goonstopher View Post

You think it would be reasonable to pay someone to make one for me?

Why they are easy to build,this is a diy forum
post #157 of 243
Quote:
Originally Posted by snickel View Post

Why they are easy to build,this is a diy forum

I can't build anything...anything!

It is in the spirit of the DIY forum even if not close to the actual topic.

IF they are easy to build then that means it would be feasible to get someone to build them. Are the woofers/parts expensive?
post #158 of 243
I spent about 1 hundred on wood and glue 150 for the driver a amp will be about 100 but Bill runs his off of of his receiver amp
post #159 of 243
Wow I need to do some more reading... can't believe such a cheap driver does so well and such low power can provide good SQ. Thanks
post #160 of 243
You could buy the plans for 14.95 and take them to cabinet shop and have a really nice one built or any carpenter or handy man could build one.
post #161 of 243
there is a list of builders on his site:

http://www.billfitzmaurice.com/Builders.html
post #162 of 243
Quote:
Originally Posted by goonstopher View Post

Wow I need to do some more reading... can't believe such a cheap driver does so well and such low power can provide good SQ. Thanks

Yes cheap is good I already had a amp so this will be very cheap for me I am about half way through the build.
post #163 of 243
Quote:
Originally Posted by snickel View Post

You could buy the plans for 14.95 and take them to cabinet shop and have a really nice one built or any carpenter or handy man could build one.

I don't know about cheap.

I was quoted about $1k for the 30" from a local builder from the list. That's without driver/amp.
post #164 of 243
Quote:
Originally Posted by echo512 View Post

I don't know about cheap.

I was quoted about $1k for the 30" from a local builder from the list. That's without driver/amp.

OUCH!!! I took a while to build mine, but someone else here who is skilled in woodworking did it in two days, and that's just because he had to let the PL and finish dry!!! For that price, I'd screw it up at least four times before I'd call someone to build it for me!!! Maybe there's someone on this forum in your area that would be willing to help you out. Where are ya'?


dbl
post #165 of 243
2 days work building: ~16-20 hours at $30 an hour: $480-$600. But the finishing work will eat you alive, time-wise.

If this is going to be a finished cab, $1000 is a steal. Finishing takes FOREVER for a great finish, unless you have $$$ equipment, and then it still takes time. Acceptable finish, much less time.

Ask for unfinished quotes on the box, it may be much less.

JSS
post #166 of 243
Quote:
Originally Posted by echo512 View Post

I don't know about cheap.

I was quoted about $1k for the 30" from a local builder from the list. That's without driver/amp.

Compared to any other cab of equal capability $1k is cheap. The list of commercially available subs that even come close to the THT is a very short one, and AFAIK none come in at less than $2k.
post #167 of 243
Thread Starter 
So my only complaint with my set up now is that I can't lower the LP filter on my receiver's sub out lower than 80 hertz Being that my main listening position is rather close to the THT 80 hertz is a little too directional, and I would LOVE to instead have it set to 60 hertz. I have a Denon 989 receiver.
If I set my main speakers crossover to 60 hertz, will the mains be sent LFE channel information down to 60 hertz? So at that point I could just use the gain control of the Dayton SA1000 sub amp? I am still learning I guess
post #168 of 243
Thats a very nice receiver I have a Denon 1508 its not in the same class has yours
post #169 of 243
Super,

What about picking up a pre-amp with a variable filter on it and putting it in the chain? Although you'd rather have the speakers "meeting" at the same frequency. What are your mains?

dbl
post #170 of 243
Just checked page 29 of your 989 manual and it states:

Crossover Frequency
Select crossover frequency from which subwoofer handles low
range signal.

[Selectable items]
40Hz 60Hz 80Hz 90Hz 100Hz 110Hz 120Hz 150Hz 200Hz 250Hz

Only the portion of the bass sound of the various speakers output
from the subwoofer that has a frequency below the frequency set
here is output.
Set this according to the low frequency reproduction capabilities of
the speakers you are using
.

Advanced :
Set the crossover frequency separately for the different speakers.
• If in the “Advanced” settings, “Subwoofer Setup” (page 28)
in the menu is set to “LFE”, it is possible to make this setting
for speakers set to “Small“ at “Speaker Configuration”. If set to
“LFE+Main”, this setting can be made regardless of the speaker
size.
• For speakers set to “Small”, sound below the crossover frequency
is cut from the sound output. The cut bass sound is output from the
subwoofer or front speakers.
• Always set the crossover frequency to “80 Hz”. When using small
speakers, however, we recommend setting the crossover frequency
to a higher frequency.


Hummmmmm


dbl
post #171 of 243
Denon receivers are not user friendly.I always have to get the manual out when I reset mine.
post #172 of 243
Thread Starter 
I am pretty good with the Denon, but this issue doesn't seem to have a simple remedy. The LFE signal would have a hole in it between 60 and 80 hertz from what I can figure. The manual excerpt that dbl posted shows that the High pass filters on the mains can be set very low, but the LFE channel can only be set as low as 80 hertz. So it doesn't look like I can achieve what I want to without throwing out the advantage of Audyssey up by using an external crossover for my mains and sub.
post #173 of 243
Other than the localazation issue how is the sub? The SQ and output are they sufficient for your taste?
post #174 of 243
Thread Starter 
Quote:
Originally Posted by reecew View Post

Other than the localazation issue how is the sub? The SQ and output are they sufficient for your taste?

Ummmm YES!!!!! The sub is simply awesome. You have to put in War of the Worlds and listen to the awesome sound of the lazers being shot at the civilians, takes your breath away! The sub sound quality is great, doesn't act boomy at all. As I stated before, this thing just oooooooooozes bass!
post #175 of 243
Thats awesome! Well im glad it performs well for you. Hopefully you can get your issue fixed. When are you going to start finishing it?
post #176 of 243
Super,

Use the lowpass on your sub amp to augment the lowpass the Denon uses (or set the lowpass in the Denon to 120Hz), and then re-run Audyssey. That should fix your problem.

JSS
post #177 of 243
Quote:
Originally Posted by superedge88 View Post

So my only complaint with my set up now is that I can't lower the LP filter on my receiver's sub out lower than 80 hertz - If I set my main speakers crossover to 60 hertz, will the mains be sent LFE channel information down to 60 hertz? So at that point I could just use the gain control of the Dayton SA1000 sub amp?



Quote:
Originally Posted by superedge88 View Post

I am pretty good with the Denon, but this issue doesn't seem to have a simple remedy. The LFE signal would have a hole in it between 60 and 80 hertz from what I can figure. The manual excerpt that dbl posted shows that the High pass filters on the mains can be set very low, but the LFE channel can only be set as low as 80 hertz. So it doesn't look like I can achieve what I want to without throwing out the advantage of Audyssey up by using an external crossover for my mains and sub.


I am not sure exactly what you want to do here, but the crossover for the regular channels sends the lower portion of there signals to the sub channel. The receiver sums the sub channel, and the LFE together.

The LFE channel is not supposed to be lowpassed. Anytime you lower it from 120Hz you are throwing discrete LFE channel info away, that is not present in any other channel. There is no way around this in a normal setup.

You could set the receiver to "No Sub," send the LFE to the mains, get an external crossover, and use it to split the <60Hz frequencies from the mains. Then sum them together and send them to the sub. Adjust the LFE level (not Sub) down -6db in the receiver and you are done. No signal loss.
post #178 of 243
Thread Starter 
Quote:
Originally Posted by reecew View Post

Thats awesome! Well im glad it performs well for you. Hopefully you can get your issue fixed. When are you going to start finishing it?

Gonna be a while, still too cold to be outside working on this, it was in the single digits this morning and not getting above freezing for at least a week. I don't mind the cold at all, but when detail work is needed, it is best to be in comfortable temperatures where you can relax and take your time, and use the finishing paint/glue/lacquer in the temperatures that they are supposed to be used in which are typically over 50 degrees.
post #179 of 243
Quote:
Originally Posted by superedge88 View Post

Gonna be a while, still too cold to be outside working on this, it was in the single digits this morning and not getting above freezing for at least a week. I don't mind the cold at all, but when detail work is needed, it is best to be in comfortable temperatures where you can relax and take your time, and use the finishing paint/glue/lacquer in the temperatures that they are supposed to be used in which are typically over 50 degrees.

Oh yea its the same here. It was 13 degrees in my garage this morning when i started working on mine haha. But im impatient. I stored all my stuff inside so it wasnt cold when applying it. It will just take longer for it to dry in these temperatures.
post #180 of 243
Every guy needs a heated garage,I keep mine at 60 when I am working out there.
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