mikebse2a3

Hey Dean that was a little while back… 😄. It was a Musical Fidelity CD/Pre 24/96 playing into an EV DX38 into AES SE 2A3 amplifier on K402/K69A HF and Cary CAD 2a3i push/pull on Jub LF… 🙂 miketn

The problem is that the typical standard type distortion you are referencing are made with waveforms that are basic and simple but in reality they don’t even begin to put the amplifier under the conditions that we are requiring it to perform with (ie: complex musical waveforms which are transient in nature as well and unlike your basic distortion test typically sited). Do you believe that a typical harmonic or intermodulation distortion test really represents a complex musical waveform which is really what an amplifier has to pass..? miketn

Could it be that the distortion isn’t what someone likes but the lack of some unmeasured distortion that the ear/brain perceives but not revealed by the test you chose to measure with…? miketn

Of course measurements have real value “when implemented and interpreted in the proper context and with their limitations recognized..!!!“ but ultimately we are designing not for a meter/test but for the human experience and the latter is the ultimate goal and the meters/tests are just tools that must be used wisely and within their limitations. Heyser who was a pioneer in measuring Audio, Acoustics and Sound Reproduction wisely warned the audio engineers of what was the intended results of their labor and the best engineers understand this fact I’m sure. By the same token the listening experience is also dependent in part by experience and training when it comes to making valid judgements when comparing sound reproduction from our Equipment/Room..!!! Einstein: "Not everything that can be counted counts, and not everything that counts can be counted" Richard C. Heyser: “Perhaps more than any other discipline, audio engineering involves not only purely objective characterization but also subjective interpretations. It is the listening experience, that personal and most private sensation, which is the intended result of our labors in audio engineering. No technical measurement, however glorified with mathematics, can escape that fact.” miketn

I find the obsession some people have with “neat pleasing to the eye wiring style” to be misguided and often sacrificing the benefits of 3 dimensional wiring of good point to point designs that can look messy to an untrained eye. miketn

Matt IMHO has created a very unique cosmetic style with his amplifiers that reflect a real artistic style and I find them beautiful and within there circuit design l believe he is just as committed to excellent sound reproduction. These amplifiers represent an Artistic Statement and a Sound Statement and for those seeking these qualities I couldn’t imagine someone not being excited and proud to own one… 🙂 miketn

My Current Favorites but I truly love all his works..!!! 🙂 Artist: Luke Created: 2021 at age 6 years old

If you can find a well setup pair of Cornwall lV it might really be the sweet spot for you. They truly fill the gap between the Forte lV and La Scala AL5 miketn

Dang.!!!! You wouldn’t put a guy on the spot would ya….. 👏😄 If your in the “Underground Jubilees club” you have a system that is capable of exceptional performance and I consider the addition of a 1502 or 1802 sub as something very important if you want to take your system to another level in musical revelations and realism and I have to say I greatly underestimated how important the ability to solidly perform with high quality and low distortion down to 18Hz was with many of my recordings. The Heritage Jubilee design I would consider as cutting edge with groundbreaking performance and is a must hear if at all possible. miketn

I hope everyone takes any opportunity they get to listen to what PWK and Roy have achieved with the Heritage Jubilee because it is truly remarkable ...!!! miketn

Check the tube pins themselves for bad solder connections. You might get lucky 🙂 miketn

If the sound actually Fades in and out Volume wise then try to observe if any of the Filaments of the right channel Tubes are out. I’ve had bad solder connections in filament circuit as well as bad tube socket connections and have even seen some bad solder connections on the cheaper china 6SN7 tube pins themselves. I actually suggest swapping tubes from Left to Right channels so that if the problem follows the tube swap then you will find the intermittent tube if one of them is your problem. If problem stays with right channel then inspect (retention) tube socket pins otherwise suspect bad solder connection in filament circuit if they are going out intermittently as next likely culprit or somewhere else in the circuit is possible if the filaments aren’t the issue. miketn

The Cornwall lV’s LF/Cabinet was redesigned to maximize its performance with special attention paid to the ports implementation and significant reduction(practically eliminating it IMHO) of acoustical box resonances. I would strongly discourage changing anything and especially how the foam has been implemented/placed because that is an important part of the design. miketn

Quote a post or posting a screen shot of the questionable post is a way to capture someone using the editing option inappropriately. miketn

Something happens when people get behind keyboards and cars that they generally would never do in person and it pays to check ourselves when that tendency starts up…!!!! Always striving to be a better person than I am…. !!! miketn 🙂

Maybe ….. but what about in another case a retailer sells a pair of La Scala AL5 because someone was able to sell his Cornwall lll through the Klipsch forums garage sell section. I sold my 79 Klipschorns and a Belle Klipsch so that I could afford my “Underground Jubilee” in 2006 so the garage sell section benefited me and the dealer I bought the Jubs from and kept everyone involved in the Klipsch Family so to speak. miketn

Considering the loudspeaker/room interaction variable do you try optimizing the loudspeaker locations with each filter change before judging which sounds best…? miketn

That was very entertaining…… good job Kevin. 👍😆

Merry Christmas to all and may you feel God’s Blessings 🙂 miketn

Yes miketn

I like your thinking 👍🙂 miketn

When you compare do you swap the locations of the speakers with each other…? I have La Scala AL5 and unfortunately a square room that creates a situation that sounds very similar to what you have described. Moving the loudspeakers and listener location to minimize room mode issues is absolutely critical and just a few inches of adjustments can have dramatic improvements. In acoustically small rooms the Room Modes from ~300Hz down dominate how we hear the loudspeakers. Even if you had a perfectly flat loudspeaker once it is installed in the room the listener can experience frequency SPL deviations of as much as 24db or more and ringing that severely mask detail, clarity and dynamic range perceptions so loudspeaker and listener locations are critical to find to minimize the negative effects of the room. The great thing is it cost nothing to experiment with Loudspeaker and Listener locations. If your using subwoofers with your La Scalas then it is well worth experimenting moving them out from the corners (where all room modes are excited to the maximum) and even just a matter of a few inches of adjustments can make dramatic changes in the 100Hz region. If you can run frequency tones you can locate the locations of the peaks and dips of the worst offending modes and then locate the mouth of the La Scala LF horn in the dips (quietest locations as you listen and this will minimize the coupling for these modes. By the way issues in the region below 100Hz can often lead to perceptions of high frequency issues and irritations which go away when the region around 100Hz and below are properly balanced and brought under control. miketn

Wow is it 2016 again after reading some comments in a couple of current threads…. miketn😄

When you use standard ohm meter your reading DC Resistance of the voice coil. Impedance of a loudspeaker driver is a frequency dependent resistance + reactance to AC current flow. Your driver resistance reading is correct for the 16 ohm “ nominal” rated driver. miketn