Table Tuba build!!

[doncolga]

Depending on what model Fluke you've got, it's peak min/max hold AC transient response is 1 ms (or better on specific models). That's good for picking up AC transients below 500 Hz. It's what you paid the big bucks for.

This is a feature not only unique to Fluke DMM's, but other high quality units from several respected manufacturers as well. Industry relies on equipment of this caliber 24/7 to troubleshoot and protect assets of significantly higher value than subwoofers.

http://support.fluke.com/find-sales/dow ... 12_a_w.pdf

Use this feature of your meter and you'll be in the clear to explore the limits of your new sub.

I figured this out on the Fluke that I have access to. I usually have it set to beep and freeze the display on each max reading it gets. If you get lots of OL's like I was getting on music signals, then adjust the range. By default it was set to measure AC to .000 decimal places and I got almost nothing but OL's with music coming through. When it's set for no decimals or just one decimal place it does great. I've used it for every job I've done except the very first one...just about feel like I need to have it just to see what's happening.

[Radian]

Absolutely!

Always be suspicious of someone working on audio equipment if they don't have a multimeter at the bare minimum. It ranks right up there with mechanics that have never used a torque wrench, or cooks that don't taste their own food.


No multimeter = F*****'n clueless

[digital_chris]

I didn't even know you could use stain on MDF. I am curious to see how it comes out.

Sorry boss, I thought I mentioned earlier that I was dressing up the cab with pine to make it look similar to my coffee table. It came out well, I took a few pics, I will post them up when I get the cab finished

[bossman]

Ohh ok...I must have missed that. I was thinking to myself that the MDF is going to soak up the stain like a sponge haha.

You will enjoy the Table Tuba once you get it finished, sounds good and very powerful. I made a few videos of mine, and posted one yesterday in the "Reviews" section of this forum.

[Drey Chennells]

Ohh ok...I must have missed that. I was thinking to myself that the MDF is going to soak up the stain like a sponge haha.

You will enjoy the Table Tuba once you get it finished, sounds good and very powerful. I made a few videos of mine, and posted one yesterday in the "Reviews" section of this forum.

it's a good video too, I had my office mains amp off already and played it through the sub anyway, deep and powerful. Youre driving an HL10 in there right?

[bossman]

Yep its a HL10c. I am glad I went with it.

[digital_chris]

Ok, here are some pics of my staining journey to the finished product...







First coat of stain when I messed up the top :-/







Here is where I didn't sand down the putty enough...



Almost done...



And the Final Result along with a picture of my coffee table to show that they match pretty well, the cab appears lighter in color in the the photo but in person, it matches the table quite well...

[digital_chris]

Now, onto how it sounds with the Foster amp. Initially I set the amp's volume to 1/2 way, the crossover all the way up to 200hz and the phase to Normal. Ran Audyssey and found that it set my speakers a bit quirky. It set my mains to +6 db each and my sub to -13 db (original setup with other amp was close to 0 db for my mains and up a few decibels on the subwoofer). I'm a bit confused at this point. So for the hell of it, I popped in "I, Robot" (I use this as my test DVD because I know how it should sound on my setup) and found that even in DTS it wasn't as dynamic as it was before. The bass is fair to good but fairly noticeable that it is in the corner and I feel like I'm missing some frequencies between my mains and subwoofer.

I ran Audyssey a few times, either with the phase set to norm or rev and the volume down a bit on the amp and still get around the same results.

I'm not sure what else to do, I haven't done anything besides change the sub amp. Any ideas?

[Scott Brochu]

Now that's some speaker porn

[Bill Fitzmaurice]

Now, onto how it sounds with the Foster amp. Initially I set the amp's volume to 1/2 way, the crossover all the way up to 200hz and the phase to Normal.

I'm not sure what else to do, I haven't done anything besides change the sub amp. Any ideas?

I run my lowpass at 80Hz.

[SeisTres]

Now, onto how it sounds with the Foster amp. Initially I set the amp's volume to 1/2 way, the crossover all the way up to 200hz and the phase to Normal. Ran Audyssey and found that it set my speakers a bit quirky. It set my mains to +6 db each and my sub to -13 db (original setup with other amp was close to 0 db for my mains and up a few decibels on the subwoofer). I'm a bit confused at this point. So for the hell of it, I popped in "I, Robot" (I use this as my test DVD because I know how it should sound on my setup) and found that even in DTS it wasn't as dynamic as it was before. The bass is fair to good but fairly noticeable that it is in the corner and I feel like I'm missing some frequencies between my mains and subwoofer.

I ran Audyssey a few times, either with the phase set to norm or rev and the volume down a bit on the amp and still get around the same results.

I'm not sure what else to do, I haven't done anything besides change the sub amp. Any ideas?

What are you running for tops? If you want the localization effect to go away, they will have to keep until down to 100hz (maybe you'll get away at 120hz), but if it's still at 200, i bet it sounds like ass.

I found that keeping the switch on "normal" gave better results than reverse. Also, if you're running the foster amp, try moving the little potentiometer (there's instructions on the website) to you give the flatter response as the TT is pretty flat already so you don't need the hump.

And WOW! very nice build. I like the feet that go all the way up as opposed to just having 2" pieces below it.

[digital_chris]

Now that's some speaker porn

Thanks Scott, she came out quite sexy if I must say myself

What are you running for tops? If you want the localization effect to go away, they will have to keep until down to 100hz (maybe you'll get away at 120hz), but if it's still at 200, i bet it sounds like ass.

I found that keeping the switch on "normal" gave better results than reverse. Also, if you're running the foster amp, try moving the little potentiometer (there's instructions on the website) to you give the flatter response as the TT is pretty flat already so you don't need the hump.

And WOW! very nice build. I like the feet that go all the way up as opposed to just having 2" pieces below it.

What do you mean by tops, my main speakers? If so, I'm running a set of paradigm monitor 5 tower speakers. Audyssey set the AVR crossover to 80 hz so I don't understand how the crossover on the amp makes any difference when set above 80, and if set below 80, won't that cancel out the AVR crossover point?

I'll do some reading on adjusting the curve on the amp as well. Are you talking about adjusting the spectral tilt? If so, I don't really understand it too well, even reading the graph. And thank you very much on the build, I agree, long legs are always a nice feature

[BoostFab]

wow very nice; i love how the TT fits right into the room;

[digital_chris]

Thanks Boost, it was all in my plans and it turned out well

As for my rant earlier on how everything is all weird, I did a little searching and found that someone else had the same problem with their AVR setting the sub DB into the negatives. His solution was to turn the amp way down. So, I did. I eventually turned it down to 1/8 max volume, re-ran Audyssey and everything is back to normal, my mains and subwoofer are both just about 0db! The odd thing is that when Audyssey does the subwoofer chirps, the sound coming from the cab is very low, but I guess it's what it wants. The cab obviously doesn't need helluva lot of power to run to my liking, very neat

Then, I did a little more reading, specifically the Audyssey setup page. I did most things correct except that's where I found that if Audyssey sets my sub trim too high or too low, I need to adjust my gain on the amp accordingly. Also, it mentions to set the filter on the amp to it's highest setting, but I didn't notice if it mentioned to turn it down after setup. I'll take another look.

[Radian]

Also, it mentions to set the filter on the amp to it's highest setting, but I didn't notice if it mentioned to turn it down after setup. I'll take another look.

It's supposed to stay up there even after the setup. That solely allows Audyssey to handle the crossover points (by taking the amp's onboard filter out of the equation).