Recent content by OldMonolith

I don't see 50ft balanced as a problem. Unbalanced wouldn't be a good idea though. It'd tend to cause high frequency roll off of unbalanced audio at that length, very wire dependant. As far as level to the amp, raising the output at the preamp will just enable clipping quicker with the gain...

I'll definitely run down to Atlanta!! Look forward to it!! Much easier and cheaper than one of the NYC or west coast shows!! Anyone who hasn't experienced walking from room to room and hearing all kinds of equipment should do so. It's a great learning experience! Wouldn't miss the...

But you didn't use equal lengths! :confused: Why??? Every one of those four twisted pairs has a different twist rate. So, the length isn't the same, as it takes more length the more it's twist goes up! Differing twist rate is part of how the design minimizes crosstalk between the pairs...

Does anybody remember the Nuke the Knack movement? Even was ads (remember this was before the net!) in some of the music magazines. Never really got what it was about but my recollection of the deal was that some of the music industry was for some reason miffed at them and tried to take it...

Cool topic!! When I make it into Nashville, I make sure I allow time to swing by Grimey's! Once I wandered in and the place was packed. Didn't know what was going on but a few minutes later in came a little equipment for a setup, so I hung around. Within a short time I was standing on the...

Didn't somebody, I think Chesky, on a 2-channel demo do a height demonstration recording?? Yes I know they do a distance demo, but I think I remember height too. Maybe? I think that I've seen discussion somewhere that when phase is kept very true that you can get some height information from...

Don't forget that you could also have a phase reversal between two different amps which could result in a suck out at the crossover frequency. And that different amps have different levels of gain. So even if you have a 6db difference from driving from balanced versus unbalanced, you are...

That would likely be a 70 volt system. That is the appropriate way to do a large number of speakers for a background music system. :music: Often, like in a business installation, each speaker will have its own 8 ohm fader for independant volume control. OldMonolith

My original Original Monoliths have the slide clips. You remove screws that go through the sides first to unlock the assembly. Then simply grab the side rails and pull them up about 3/4's to one inch to unlock and disengage them. Mine have no cross brace up at the top...it's just the panel...

Keep in mind that what's involved in the amplifier to speaker interface is much more than a specific frequencies propagation time though the however long cable. You also have the back EMF from the speaker which is picked up by the typical amps feedback loop and fed right back into the amp...

Interesting this thread came up today! I was thinking while driving home about advances, or lack of them, in audio. This was prompted by reading a thread on DiyAudio.com that was a pretty good back and forth about a guy that originated some thought and design on amplifiers and low TIM...

I agree with Mitt regarding startup! In the professional world, its not all uncommon for somebody to unplug some equipment and remove it after its been running continuously for years and sometimes decades. And often, when finallly powered down, it won't want to come back up even though it was...

The old rule of thumb is 10 times. You'd have a hard time getting to a 100 times. So if you have a 10K input impedance, then you want your output device to be a 1K or lower to drive it without having the potential to roll off the high end. To heavy of a load also can raise distortion...

Keep in mind the possible danger of putting a tube preamp in front of a solid state input stage amp. If you power up the amp first, and then apply power to a tube output stage preamp, the output coupling cap must charge before it blocks. During that brief moment a pulse of DC can pass. :eek...

Remember that at the transformer outside your house, at the secondary feeding you, is a very low impedance point with extremely low noise. The transformer is a large step down in voltage. As it steps down the voltage, also the disturbances on it are stepped down. As with any transformer, its...