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mikebse2a3 last won the day on December 30 2022
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I suspect it might be the best way to obtain desired Q values at the frequencies of interest in a particular circuit as it relates to compromises in building real world inductors.
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RIP Bob Heil
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Interestingā¦. But I would suggest the Heil AMTs be vertically aligned and as close to the K402 as possible to minimize image smearing assuming you want the best imaging possible with this configuration. miketn š
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I was fortunate to have met Larry several times and our conversations were always interesting. Rest In Peacešļø
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Need Help: Decware + La Scala or KHorns
mikebse2a3 replied to ThomBoh's topic in 2-Channel Home Audio
Reading through this thread it sure seems apparent to me that it is the Decware amplifiers are the source of your Hum Issue. The question then becomes why are you experiencing it at such a high SPL level at the listening chair. This makes me ask how you experience the Hum when you walk around in the room.? Do you hear it as significantly louder and quieter as you move around and also as you measure it with your SPL Meter? I could see in an unfortunate situation where a possibility that room modes at 60Hz/120Hz could be coupling very efficiently with the loudspeaker and listening positions that would exasperate the inherent by design hum of these amplifiers. An unfortunate combination of room dimensions could lead to Room Modes that could easily add +12db to the Hum Level at some areas of the room. Just a thought anyway and I hope you find a solution to this problemā¦ š miketn -
ChrisA posted some information here JC
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V.T.L. Ultimate pre-amp sound evaluation
mikebse2a3 replied to Cal Blacksmith's topic in 2-Channel Home Audio
I hope it doesā¦. I have the āThe Vacuum Tube Logic Book - Second Editionā and none of the resistors or capacitor values are on the schematic and it also appears to have a mistake (ie: connection line is missing from 2.7k resistor to DIP Switch Resistors) as seen in the schematic drawing above where the DIP Switch resistors are not shown as being in parallel when in the āON Positionā with the 2.7k resistor shown in the above schematic. Yes you should be able to determine the values with a meter. -
V.T.L. Ultimate pre-amp sound evaluation
mikebse2a3 replied to Cal Blacksmith's topic in 2-Channel Home Audio
@shawnwes You can find more pictures here if you havenāt seen these before that might help you. https://www.stereonet.com/forums/topic/248051-withdrawn-or-relisted-fs-vtl-the-ultimate-preamplifier/ Here are a few pictures of a VTL Ultimate Pre-Amplifier and the schematics I was able to see before I was locked out and requested to join the group. This one was on another topic post on the same website. -
Iām thinking this was posted in the past here but I thought this nice Interactive Frequency Chart may be a helpful tool for those trying to evaluate their systems performance by being helpful in narrowing down what areas they feel could need improvement. This link will take you to the actual āInteractive Frequency Chartā https://alexiy.nl/eq_chart/ Example: This picture below shows the Instrument Data for MALE VOCAL miketnš
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I can play a CD but not so much a guitar š
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Based on my own experience with the DSpeaker and my La Scala AL5 I believe with some fine tuning the OP will be able to reach a place of satisfaction with more of his music being enjoyable. The āemphasisā in the 100Hz - 200Hz region is audible and I personally consider it a significant improvement and that a more accurate reproduction of the recordings are achieved when itās effects on the recordings are removed. I respectfully disagree and I certainly donāt believe the OP, myself or others discussing the āemphasisā in the 100Hz -200Hz region of the La Scala AL5 is wrong or misleading anyone. Itās really simple in my mind and that is if you want to fine tune and thus improve the reproduction of the La Scala then implement the PEQs that Roy has suggested for active user who have that capability. This is easily achieved by active methods but my guess is that it is impractical in passive crossover designs (impedance would drop to low in value with compensation network) or āI believeā Roy would have implemented it in those as well. @Flevoman wants the most enjoyment he can achieve from his system as I do and I believe most anyone on this forum wants so he is searching for the answers to achieve that goal wherever it leads and thus started this thread simply to find answers and solutions. miketnš