Search found 5066 matches

Return to advanced search

Re: Looking for some Speaker Mod Advice

I actually have a very old (1970s vintage) set of Savard speakers that I'm not using. I may one day refurbish those. They have big horn style tweeters. It would be interesting to open those up and see what's inside. They were pretty expensive back in the day, so they may have things like real cross...
by ludi
on Tue Apr 01, 2014 2:48 pm
 
Forum: The Back Porch
Topic: Looking for some Speaker Mod Advice
Replies: 62
Views: 1935

Re: Looking for some Speaker Mod Advice

Here is a rough visual approximation of what JBI is describing. In a normal speaker with a first-order crossover, the three individual drivers should overlap pretty cleanly at their roll-off points. The output from the adjacent drivers will sum at that overlap, producing a ripply but generally even ...
by ludi
on Sat Mar 29, 2014 2:12 pm
 
Forum: The Back Porch
Topic: Looking for some Speaker Mod Advice
Replies: 62
Views: 1935

Re: Looking for some Speaker Mod Advice

The woofer is receiving a full-range signal but it will not reproduce it. For a unit that size, it is probably rolling off naturally somewhere around 4000 Hz. The midrange crossover is then calculated to pick up in the same range. If there was only a single capacitor on the mid and tweeter, and no c...
by ludi
on Fri Mar 28, 2014 2:40 pm
 
Forum: The Back Porch
Topic: Looking for some Speaker Mod Advice
Replies: 62
Views: 1935

Re: PC Audio questions

Let me be clear: IF there is a difference within the range of human hearing, THEN it would be audible. The problem is that self-professed audiophiles get hung up on the notion that they can "hear" differences between op-amps that produce technically-indistinguishable results, when blind te...
by ludi
on Thu Mar 27, 2014 12:19 pm
 
Forum: Echo Vale
Topic: PC Audio questions
Replies: 73
Views: 1518

Re: Where To Find Good Artwork?

Thanks for all the suggestions guys. I've been hesitant to do much online, because artwork and such can appear very different in person. There are probably plenty of exhibits and shows around (I'm just outside Chicago), I just didn't really know where to begin looking for them. I also wanted to avo...
by ludi
on Wed Mar 26, 2014 2:44 pm
 
Forum: The Back Porch
Topic: Where To Find Good Artwork?
Replies: 13
Views: 916

Re: PC Audio questions

It may be harder to distinguish between OP-AMPs in some implementations vs others. And some implementations are better than others. I have sound card that uses four separate OP AMP chips for right and left stereo channels - one for each polarity. I could definitely tell the difference when changing...
by ludi
on Wed Mar 26, 2014 12:02 pm
 
Forum: Echo Vale
Topic: PC Audio questions
Replies: 73
Views: 1518

Re: Rest in peace, Paul Walker...

Image
by ludi
on Wed Mar 26, 2014 11:52 am
 
Forum: The Back Porch
Topic: Rest in peace, Paul Walker...
Replies: 154
Views: 7386

Re: Where To Find Good Artwork?

If you live in NYC or close to it there is a woman who does some fantastic art in around 5-10 minutes with spray paint, some basic tools and some amazing tricks to make them look amazing. https://www.youtube.com/watch?v=sIgFAXcdVAI This is one of the many videos out there of her painting....now fin...
by ludi
on Wed Mar 26, 2014 10:35 am
 
Forum: The Back Porch
Topic: Where To Find Good Artwork?
Replies: 13
Views: 916

Re: Meze Headphones

As a long-time DIY audio enthusiast and occasional speaker builder: For a speaker box, the most desirable quality is rigidity as the box will otherwise resonate somewhere in the reproduction range of the bass driver, and transmit that sound into the room, coloring the frequency response and reducing...
by ludi
on Mon Mar 24, 2014 10:50 am
 
Forum: Echo Vale
Topic: Meze Headphones
Replies: 21
Views: 547

Re: PC Audio questions

5) Swappable OP-AMPs. Sounds good on paper. According to the TR review, the different op-amps sound different, but none make it as good as the Xonar. Unfortunately, this is one of those cases where knowing the difference, IS the difference, or else there is an incorrectly controlled third factor, s...
by ludi
on Mon Mar 24, 2014 10:29 am
 
Forum: Echo Vale
Topic: PC Audio questions
Replies: 73
Views: 1518

Re: Captain Ned...

Since the Cap already owned up to it, I can recall just a few incidents of heavy-handed modding in the timeframe in question, but they didn't persist -- evidently for the reasons already noted. That's pretty much par for any institution run by actual human beings, and TR is one of the best. I've bee...
by ludi
on Wed Mar 19, 2014 4:00 pm
 
Forum: The Back Porch
Topic: Captain Ned...
Replies: 63
Views: 1545

Re: Flight 370

Possible bad news for the conspiracy theorists: an experienced pilot decided to try out Occam's Razor and came up with this theory at Wired Magazine , suggesting that the cause was simply a landing gear fire mistaken for an electrical fire, or else an actual electrical fire, and that everything foll...
by ludi
on Wed Mar 19, 2014 12:06 am
 
Forum: The Back Porch
Topic: Flight 370
Replies: 36
Views: 1221

Re: Dead RK-9000

though the fact that the plate is painted probably limits the usefulness of this mod. I suppose if I felt like popping all of the keycaps off I could scrape away a little bit of the paint around each switch, but that sounds like a lot of work! I wouldn't bother. Most paints are not the greatest ele...
by ludi
on Thu Mar 13, 2014 10:19 am
 
Forum: General Hardware
Topic: Dead RK-9000
Replies: 39
Views: 1257

Re: Contented?

Nearly the same boat -- i2500k, 16GB RAM, Intel 320 SSD, couple Spinpoint F3s for bulk storage, BRD optical, Windows 7. And still using an MSI n460GTX Cyclone that I won from a TR contest a couple years back. System still does everything I want/need right now and does it quick, so reasons to go thro...
by ludi
on Fri Mar 07, 2014 11:44 am
 
Forum: General Hardware
Topic: Contented?
Replies: 25
Views: 918

Re: Work needs a projector and I''m frustrated

Our conference rooms at work use these . They're self-powered, so all you need to run across the ceiling is an extension cord to the projector and an ethernet cable to the receiving unit. If you don't have a suspended ceiling available to hide the wires, maybe try some self-adhesive plastic wire cha...
by ludi
on Thu Mar 06, 2014 5:31 pm
 
Forum: Visual Haven
Topic: Work needs a projector and I''m frustrated
Replies: 6
Views: 351

Re: Work needs a projector and I''m frustrated

Are you free to move the mounting position? If so, arvald has narrowed down the "short throw" range for you. Move the mount waaaaaay forward so that there is minimal interference from the room, and then tweak the dickens out of the keystone adjustment. If cabling is a problem, you might ne...
by ludi
on Thu Mar 06, 2014 3:43 pm
 
Forum: Visual Haven
Topic: Work needs a projector and I''m frustrated
Replies: 6
Views: 351

Re: New notebook in a few months

Edit - Also, the current HP bios is pretty limited/horrible, does Asus or any other manf. have better bios options for a notebook? Why would that matter? The usage profile you stated doesn't require much in the way of tuning, and the fully integrated construction of a notebook means there isn't muc...
by ludi
on Thu Mar 06, 2014 12:38 pm
 
Forum: General Hardware
Topic: New notebook in a few months
Replies: 9
Views: 548

Re: Dead RK-9000

Leave in unplugged for a couple days, then try again. It might be working again.
by ludi
on Thu Feb 27, 2014 11:41 am
 
Forum: General Hardware
Topic: Dead RK-9000
Replies: 39
Views: 1257

Re: Replacement Wall-Wort for DAC

Some high end equipment does almost exactly what you're proposing -- there is a maintenance charger when in standby, and when power is connected, the maintenance charger is disconnected from the battery and the equipment is connected via a throwover relay.
by ludi
on Wed Feb 26, 2014 3:33 pm
 
Forum: Echo Vale
Topic: Replacement Wall-Wort for DAC
Replies: 24
Views: 1358

Re: LCD Projector

No particular experience with projectors, however after looking at your preferred specs, the first thing I went looking for was this:

http://www.projectorpeople.com/resource ... -guide.asp
by ludi
on Wed Feb 26, 2014 12:12 pm
 
Forum: Visual Haven
Topic: LCD Projector
Replies: 5
Views: 335

Re: Looking for some Speaker Mod Advice

I knew the padding was not the best material, but that can be offset by using more of it. The echo in the cabinet was pretty sharp since it's a fairly deep cabinet. I was surprised about how light the woofer was. There's just not much to it at all. I'm guessing the other components are also not of....
by ludi
on Wed Feb 26, 2014 12:03 pm
 
Forum: The Back Porch
Topic: Looking for some Speaker Mod Advice
Replies: 62
Views: 1935

Re: Replacement Wall-Wort for DAC

I tried to find a picture that showed the part number of the internal regulator -- to no avail. I can say with about 99% certainty that there is not a switching regulator inside the case. The only inductors visible on the board are not a switching inductors. They look more like a ferrite bead filte...
by ludi
on Wed Feb 26, 2014 11:36 am
 
Forum: Echo Vale
Topic: Replacement Wall-Wort for DAC
Replies: 24
Views: 1358

Re: Replacement Wall-Wort for DAC

Unless the factory power supply is doing something definitely objectionable, like introducing high frequency noise into the system, an alternate supply won't make any difference. There appear to be several DC-to-DC conversion circuits inside the chassis, along with a good deal of filtering. However,...
by ludi
on Sun Feb 23, 2014 11:53 pm
 
Forum: Echo Vale
Topic: Replacement Wall-Wort for DAC
Replies: 24
Views: 1358

Re: Difference between Macro & non-Macro lenses

Question to consider: what is your goal in shooting macro? Do you want to be able to have a bee on a flower fill the entire image, at a detail level where you can count the hairs on the bee's closest leg? Or maybe capture the beautiful intricacies of an ice crystal? If so, you want a macro. Or, do y...
by ludi
on Sat Feb 22, 2014 12:12 am
 
Forum: Visual Haven
Topic: Difference between Macro & non-Macro lenses
Replies: 22
Views: 946

Re: Looking for Speaker Recommendations (Computer Setup)

I don't think there is a system on the market that meets all of the specified requirements. But of the compromises that will have to be made, the Klipsch ProMedia will probably be the most effective option.
by ludi
on Wed Feb 19, 2014 8:53 pm
 
Forum: Echo Vale
Topic: Looking for Speaker Recommendations (Computer Setup)
Replies: 6
Views: 516

Re: Looking for some Speaker Mod Advice

I was able to get a huge sheet of foam carpet padding from a local flooring store. I opened up one of the Yamaha speakers by removing the woofer. There's not much to the woofer. It was much lighter than I expected, with a fairly small magnet. I unplugged it and looked inside the cabinet. Sure enoug...
by ludi
on Mon Feb 17, 2014 11:44 pm
 
Forum: The Back Porch
Topic: Looking for some Speaker Mod Advice
Replies: 62
Views: 1935

Re: DAC question

This is somewhat outdated, dating back to when most transistorized amps used BJTs (before MOSFETs became widely used). Transistor amps can indeed have excellent linearity because you can apply huge amounts of negative feedback around a high-gain loop. But they also tend to have "crossover dist...
by ludi
on Mon Feb 17, 2014 4:36 pm
 
Forum: General Hardware
Topic: DAC question
Replies: 49
Views: 1721

Re: Looking for some Speaker Mod Advice

I checked the speakers, hoping the back has screws that would allow me to remove the back panel. There's none, so it looks like accessing the interior of the speakers is going to be a bit of a pain. I guess I am supposed to go in through the woofer opening. The crossovers are just caps. I'm guessin...
by ludi
on Wed Feb 12, 2014 12:24 pm
 
Forum: The Back Porch
Topic: Looking for some Speaker Mod Advice
Replies: 62
Views: 1935

Re: Looking for some Speaker Mod Advice

I've done what Ludi has said to do - a foam anechoic surface. I did it using plain old sofa foam and cutting a block in half with a sawtooth pattern, made a pretty big difference to the resonant boomy/muddiness of the speakers. That can work, but with a caveat -- many upholstery foams and similar m...
by ludi
on Tue Feb 11, 2014 3:00 pm
 
Forum: The Back Porch
Topic: Looking for some Speaker Mod Advice
Replies: 62
Views: 1935

Re: Looking for some Speaker Mod Advice

There are two modifications that would improve the sound -- the fiberglass or polyfill approach will help with the bass range, since it works by reducing the standing waves that form within the cabinet. For the upper-bass and midrage frequencies, you need acoustic foam with the usual "eggcrate&...
by ludi
on Tue Feb 11, 2014 12:49 pm
 
Forum: The Back Porch
Topic: Looking for some Speaker Mod Advice
Replies: 62
Views: 1935
Next

Return to advanced search