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JohnA last won the day on February 4 2020

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Klipsch Fanatic

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  1. I use a Meterman 27XT. https://www.tequipment.net/WavetekMeterman27XT.html
  2. A few old Macs has a derived center channel out at preamp level. Does either of yours? If not, Mr. Paul sketched up a line level box to derive the center channel and that could feed your 5100 to control the center. I would link to the Dope From Hope had I found it. I will also recommend you rework the Heresy's crossover to be as much like your La Scala crossovers as possible and drop the taps of the squawker and tweeter on the autoformer one step to flatten the Heresy's response curve. I have done both on my HT center channel Heresy.
  3. Do these chip amps more or less double/halve power then the impedance changes by 2 like a transistor amp? I notice the Toping is rated at 125 watts into 4 ohms.
  4. They appear to be what we have termed Heresy 1.5s. That is, Heresy 1 woofer and tweeter and Heresy II squawker. The caps are original Klipsch. wait until you get your quality electronics back before final judgement, and check each driver to be sure all are working with matching output before replacing the caps. However, they are likely to be the problem. Use high quality film and foil caps for replacement. They will be expensive, but you don't have to spend $200 each. Audiocap PPT The gas at Parts Express ought to do. Go with better if you can. Avoid metalized caps as they sound a little brittle and edgy and Heresies don't need that. Look on the back edge plies for letters and numbers. They will be the serial number and/or the builders stamps. A quick repair for the hole in the woofer is a small piece of cigarette paper on each side of the cone glued with Somers. Smooth the edges of the hole first. you can get a replacement or that one reconed later. I'd just leave the dust cover alone, but there are some tricks with duct tape and vacuums to pull it out.
  5. Heresy IVs are configured for bi-WIRING, not bi-amping. That means 2 pair of wires from one amp channel to each speaker. A dubious benefit if your wires are large enough. Bi-amping, actually for a Heresy, tri-amping, should bypass any passive x-over should be bypassed (short of a capacitor protecting the horn drivers) and then the electronic crossover can contour the driver's response, minimize the overlap between drivers and time align the drivers. This has a verifiable benefit.
  6. Importantly, those '70s receivers have the correct cosmetics to make a 2-channel system look right. Since they sound pretty good, I get both things.
  7. I bought an Alesis RA-150 for the church a few years back. I sounded "rather decent".
  8. 100 to 200. Switching from a SS amp with a 40 damping factor to one with 200 was a noticeable change very nearly obvious to a disinterested female. 😁
  9. You might/should have serial numbers for your Heresies stamped into the edge plies on the top rear edge. If your Heresies have front mounted horns, they are II, III, or IVs. We can id the difference by components.
  10. You could do it, but dropping the xover point to 4500 Hz and keeping the 6k - 9k EQ on the K-77-? will be tough. At 105 to 106 dB, the K-77s are a little hot, too. I believe you would need to double the attenuation of the Type AAs 21 dB/Oct to protect the tweeter. The literature indicates the lower crossover point results in nearly equal horizontal dispersion between the squawker horn and the K-77 at that crossover point.
  11. More like 21 dB/Oct because of the built in EQ.
  12. If you will adjust your load impedance, you'll get more accurate results. Woofer - 6.3 - 6.5 Squawker - 12.5 at 400 Hz Tweeter - 8 ohms (7.2 DCR) Your model does show the EQ built into the tweeter filter.
  13. Each speaker needs its own amp channel.
  14. Look at Acurus, Parasound and Rotel integrated amps. Note that you rarely/really don't need more than 50 watts/channel.
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