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GlennyC

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  1. HP EliteDesk 800 G2 PC running Tidal Master Quality Software -> Mytek USB Cable -> iFi iPurifier2 USB filter -> Mytek Liberty DAC -> TRS/XLR Cables -> B&K Refetence 50 Preamplifier (Direct Mode) -> XLR Cables -> Accuphase A-30 Amplifier -> 14 gauge speaker wire -> Klipsch La Scala AL5s (Note: I also have a Behringer DEQ2496 between the Preamp and Amp that I can turn off to make it just a pass through. In addition on the subwoofer out of my Preamp, I have a Klipsch R-112SW subwoofer)
  2. Hate on me. Now that I’ve got my AL5s working properly, I ran an A/B test with a switch box to test for listening differences between the AL5s and my Heresy IIIs. The AL5s are more efficient than the Heresy IIIs therefore the AL5s are louder when switching to them. However, luckily I have a gain switch on my amplifier that will boost output in 6 dB increments. So, when I switch to the Heresy IIIs, I also bump the amplifier output by 6 dB. Switch to the AL5s, drop the amp by 6 dB. This gives a great comparison. Results... man for the extra $13,000 the differences are minimal. (I have a powered subwoofer to augment the low end and can’t hear above 10,000 Hz) I have to believe the differences between a La Scala II and a La Scala AL5 are even much more so minimal (to me). La Scala II is $5000 used. I paid $13,000 with tax for the AL5s. I have time to return the AL5s still. Decision to follow.
  3. This is the same graph as above with 1/3 smoothing instead of 1/12. I can see why Chris A recommends 1/6 or finer. 1/3 hides a lot of warts. Thanks to all for the great guidance. I am happy I was able to absorb a portion of it because I will be able to enhance my listening experience substantially now. Plus I was able to fix my tweeter based on the guidance. Great people on this forum!!!
  4. So, now 3 different PEQ frequencies - all below 300 Hz to match the Left and Right channels...
  5. Why not PEQ at two different frequencies for an even better match between the speakers? Right channel PEQ at 90 Hz +2.5 and at 160 Hz -4.5. Both Left and Right channels on one graph. DEQ2496 magic!!
  6. PEQ Right Channel Only at 160 Hz minus 2.5 Gain looks even better.
  7. PEQ Right Channel Only at 160 Hz minus 4.5 Gain.
  8. So, I just remeasured after checking all my connections and being meticulous about positioning the microphone in the same relative position in front of each speaker. New results look much better as far as differences between speakers goes. Positioned the microphone 16 inches in front of each speaker. I still have that Right channel peak at 160 Hz. But I will be able to PEQ that out of there. Will try that now.
  9. So I opened up my La Scala after getting to OK from tech support at Klipsch. Wire was loose to the tweeter. Easy peasy fix. Ten minutes at most. I ran the REW measurements as follows.... Red line is Right speaker. Green line is Left speaker.
  10. Thank you Chris A. I will do as you suggest and PEQ unlinked not GEQ linked. I just realized that when I get my Sunfire True Signature subwoofer back from repair I will be able to not use the preamplifier subwoofer out (not using the preamplifier crossover at all). I can send the full range of frequencies right and left channels to the DEQ2496 from the preamp and then from the DEQ2496 to the Sunfire, use the crossover in the Sunfire and return the left and right back to the amplifier. In this way I will be able to correct from about 17 Hz to 300 Hz. The only problem is I have been using XLR balanced connections between the preamplifier and the DEQ2496 and the amplifier. Between the Sunfire and the Amplifier would have to be RCA unbalanced. I will have to test how it sounds but in my experience the XLR is noticeably (significantly) better.
  11. Ok I get it. Only measure close to the speaker (1 meter or less) and not with both speakers playing. After measuring only correct below 300 Hz (to be safe). Apply corrections then remeasure. Does the DEQ2496 let you correct each channel independently? I don’t think I have been doing that. So, by hand I will average the correction* for both channels, apply and remeasure (using REW). I have been doing AUTOEQ with pink noise with the Behringer microphone (uncalibrated) connected to the DEQ2496 in the listening position. This adjusts and turns on the GEQ (in the frequency range from 60 to 17,000 Hz) for both speakers. I should set the range to 60 to 300 Hz. I am not going below 60 Hz because the DEQ2496 sits between my preamp and amp and my preamp is sending all frequencies below 55Hz to the subwoofer out. The (stereo) amp only gets 55 Hz and above. * I have a second DEQ2496. Maybe use one for each channel then I don’t have to average the corrections?
  12. When I did each individual speaker I was at 1 meter. But when I do L + R, I put the mic at listening position.
  13. Does that mean I'm a hopeless case? I do have to thank you Chris A for pushing me to measure each AL5 separately. That's the only way I would have found the tweeter problem in my right speaker.
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