mikebse2a3

The hum level varying with the volume control indicates the hum is being induced into the circuit before the volume control. I’m wondering if your hum is due to a radiated magnetic field from the problem amplifier as it relates to the physical location of the amplifier versus the Grounded Grid/phono pre combo and the phono section of the Slider and not a chassis ground voltage differential issue between the equipment induced Hum. Note: The High Gain of the phono section of the equipment would be the most likely to expose this interference effect. Have you tried physically rearranging the Amplifier’s location and wiring relative to the Grounded Grid/phono pre combo and the phono section of the Slider to see if the Hum Level changes…? Changing Distance and/or Orientation relative to each other could solve or reduce the issue. miketn

I would never “assume” a Customized or Modified item was done intelligently regardless of the labeling…😄

Yes Klipsch could customize their products and it would be an original item designed and customized by them… but anyone other than Klipsch customizing or modifying a Klipsch product can’t legitimately call it an original Klipsch design or Klipsch Custom Design or Klipsch Modified Design since it wasn’t an actual Klipsch Design..!!! Its really that simple IMHO.. miketn 🙂

When someone uses the word “Upgraded” to describe a change to something it can be very misleading and especially to the inventor of the item who didn’t have anything to do with the changes from the original design. IMHO only the inventor has a legitimate right to change a design and call it an upgrade. If you customize a Klipsch Loudspeaker it is to suit an individual’s specification/reasons and would best be described as “Customized” as for example: “this is my Customized Klipsch Cornwall” and then everyone should understand it is no longer an Original Klipsch Loudspeaker by design or name and should at a minimum be referred to as a “Customized Klipsch Cornwall as in the previous example” which then clearly indicates it is no longer an original design approved by Klipsch. To “customize” something is to make it your own and different from the original and speaking for myself I enjoy customizing things to suit my individual needs or ideas and others are free to judge my customized designs but I also understand why the original designer wouldn’t want me calling my customized design by its original name alone since they had no say in my customizations. miketn

Here is a snapshot of the pictures in the link if that helps.

If you take into account the efficiency of the compression driver/horn (example a TAD TD4002 is good for 110db with 1w input) and the maximum listening level expected in the listening room then 2.7w might be plenty for many home listening rooms. miketn

I doubt it … The AL5 HF Cabinet is about an 1” to 1.5” taller due to the the new tweeter and the crossover of the La Scala ll wouldn’t be compatible without modification as well. miketn

Do you have Cable going to the AV receiver…? If so disconnect the Cable to the receiver and see if the hum goes away. If so you have a ground loop issue most likely and would probably benefit from a ground isolation device. miketn https://www.parts-express.com/Jensen-Iso-Max-VRD-1FF-75-Ohm-Inline-Digital-CATV-Isolator-H-246-0121?gclid=EAIaIQobChMIvdeuyq6T8QIVpG5vBB2s7QivEAQYASABEgIgevD_BwE

So sorry to hear this. RIP... Dave Mallette

The resonance/masking effect observed in the Cornwall III has been significantly reduced in the Cornwall IV design and has nothing to do with the mechanical cabinet bracing/panel resonances. The resonance observed in the Cornwall III is cabinet modal resonances (think room modes) and Roy has greatly reduced this in the Cornwall IV design. My observations along with others during well controlled comparisons during the Chief Bonehead Class are here for anyone interested. miketn

Your human so give it some time and the desire to change things will return.... 😄 miketn

Just to clarify is the custom built RCA 20’ or 20”..? 20’ of RCA cable could cause frequency response issues due to excessive total cable capacitance. Curious is your listening room very live (ie: mostly hard surfaces or does it have a balance of soft surfaces ( like cloth furniture... etc) ..? Pictures of the room might help us understand what you’re dealing with. miketn

Select 0.25 Playback Speed in settings for video and expand screen and you can visualize the movement easier. You can also pause the video and scroll for movement details. miketn

My son in law lost his Dad to Covid last week. He turned 65 in March and was very healthy with no health issues otherwise. Jerry choose to not take the vaccine and now sadly there is a deep void left behind and we have to wonder what if he had made a different choice. Jerry you will be very missed...!!! 😕 miketn

Hey JC Just for clarity I want to point out that the document I attached in the original post is dated 2014 and I haven’t checked what drivers were being used at that time and would advise a little more research is warranted to verify if these settings match someone’s drivers they currently have. It’s also my understanding that these settings are a starting point during installation and test performed in the actual location the systems are placed my require changes as needed. I can’t say any particular setting would be obvious to change JC but I’m sure as your ears have already told you with the passive crossovers that some tweaking will be required. I can tell you that you can use REW Time Gated measurements in the MF/HF range to get a good picture of what is needed. I generally like to run on-axis curves of each Horn/Driver individually at the mouth of the Horn and also at (1) meter for comparison and I also measure by placing the MIC at a vertical height that is somewhere between the MF and HF driver/horn throat height at (1) meter. [I’ll usually make a scaled sketch of MF horn/driver throat height, HF horn/driver throat height and the listener ear location height along with listener distance from loudspeaker to find the desired MIC height for the combined acoustic output measurements.] I also find it very beneficial and necessary to use listening test using pink noise to verify filter setting needs based on acoustical measurements because I have often found this can eliminate errors due to the potential that acoustical measurements may not actually capture everything the way we are hearing it due to limitations inherent in acoustical measurements especially if we haven’t recognized the limitations when making the correction/compensation filters based solely on measurements. miketn