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Lone Mountain Audio

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  1. No you didn't, sorry to infer that. Earlier posts about active linked it heavily to DSP and Class D, which are unrelated to active, so I was responding in broader terms. Id love for you to A/B an active and passive side by side. Its quite eye opening (or I should say ear opening). Brad
  2. The standard active uses some output devices in an Integrated Circuit. A discrete design as separate output devices that can be matched and driven with more current. I am not an electronic designer so I always think of it as discrete is the old fashioned way of doing it, and IC's is the newer way. I'm not sure that's an ideal discription for you or what you wanted to know. Brad
  3. HI Kal Is DSP really the sign of modern acoustic design? Active has nothing to do with DSP or Class D or anything like that. Its about trying to create a minimum phase loudspeaker for lower phase error and less distortion as a by product. I am sure someday the idea of putting amps BEFORE a giant, lossy coils of copper in a passive crossover will be perceived as so old fashioned. It is the same way we've been doing it since the 1930s or before! Sort of a parallel between a combustion engine on a transmission to an axle to drive the wheels (lots of losses and problems creat
  4. Hey Kal Okay, I'll bite. Active is the simple solution to the passive crossover problem. Here are some of the problems: 1) One cannot control phase through a passive crossover. One of the biggest differences in a proper speaker system vs a poorly performing one is making it a "minimum phase system" Measuring how well the speaker controls phase is a part of speaker measurement everyone in the industry EXCEPT consumer. 2) there are tremendous losses though all that copper even in a properly built passive crossover with oxygen free copper oin proper air core inductors. Then add
  5. Perfect explanation of the different types! It drives me nuts to see people incorrectly refer to active loudspeakers as "powered".
  6. I have to add that KEF did most of the heavy lifting in engineering the BBC monitor (LS3/5 -LS3=outside broadcast monitor; /5 =5 inch woofer). KEF was a OEM driver manufacturer and Cooke, one of the KEF founders, had worked at the BBC for a year as Technical Director. The BBC LS3 monitor speaker was built under contract by multiple manufacturers using a KEF KIT for both woofer and tweeter. Some familiar speaker names were at the BBC during this period of standardizing on loudspeakers across all venues to improve quality of sound: Dudley (and Beth) Harwood (Harbeth) and Spencer and Doroth
  7. Following engineers is and always has been the way to get good records or hear records that are well made. In modern times, start with Al Schmidt, George Massenburg, Chuck Ainlay and Ed Cherney. Most of these guys do a variety of records, few if any are classified as “audiophile records“, but they are the best of the best. They work constantly as the best musicians hire them again and again (except Ed now as he passed recently). In previous times (60s-70s) its a different list as they worked with a much more primitive studio set up, fewer tools but all that required greater inventiveness
  8. Agreed. ATC crosses over at 3800Hz as well, so we are well familiar with this idea. A 3 dB boost at some frequency would eb heard to hear, but an entire band being down 3dB is audibly quite significant (to us). People's idea about what is "louder" or "softer" is often different to what we think and measure with our Audio Precision 515x. Brad
  9. Sorry Bluesman, I missed that post and said the same thing you did. Forgive me! I agree tweeters are so small and delicate they usually either work or are dead- I've not seen them reduce level and stay consistent response wise. I am with you, it is likely midrange crossover or some unusual failure. Brad
  10. If you are speaking of a biamp or triamp speaker input panels, many of these are not direct inputs to the tweeter. They are usually inputs to the passive network and a HF section of a network still outputs something to the midrange; a passive biamp network is not a brick wall protecting the tweeter. Plus there are many parts prior to the tweeter so if the network is bad (has bad parts) then you might think its the tweeter when its really the network. The only failsafe way to check is to physically disconnect and switch the tweeter between right and left. Brad
  11. Another simple test is to swap tweeters from right to left/left to right. Does the loss follow tweeters or stay the same with the crossovers? That narrows it down fast. Brad
  12. Yes, you would need to maintain channel consistency but I would also imagine you need crossover adjustments, as the "new" tweeters would most likely not be the same identical sensitivity off the old ones. Even a very small difference in sensitivity would be audible as more sensitivity means brighter if its a tweeter or darker if's lower sensitivity. And its not the Tweeter's fault or the factory's as no production method offers precision in "adjusting" driver sensitivity without changing something else. So it is what it is and the adjustments happen through crossover parts. It
  13. DIfferent frequency produces different port noises. It could be a vibration issue of something else, but I would guess its not the screen. Maybe? Brad
  14. I don't think chains work unless you are dealing with a lot of mass; chains have a resonance too! I think isolating pucks of some sort is the better plan. My favorite is the RAB Audio versions here: https://www.sweetwater.com/store/detail/ProJax40--rab-audio-projax-px40-studio-monitor-isolation-kit-8-pieces They also make them for heavier monitors. Brad
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