Chris A
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- Preamp, Processor or Receiver
- Emotiva XMC-1 AVP, Xilica XP-8080 & miniDSP 2x4 HD
- Main Amp
- First Watt F3, Crown D75-As (5 total) bi-amping
- Additional Amp
- Crown XTi-1000 for subwoofers (2)
- DAC
- Topping D10 Balanced (stereo only mode)
- Universal / Blu-ray / CD Player
- LG UBK90, Oppo BDP-103, Laptop
- Front Speakers
- Klipsch Jubilees (TAD TD-4002 compression drivers)
- Center Channel Speaker
- K-402-Multiple Entry Horn (full range)
- Surround Speakers
- Klipsch Belle bass bins with ESS AMT-1, bi-amped
- Surround Back Speakers
- -
- Front Height Speakers
- -
- Rear Height Speakers
- -
- Subwoofers
- DIY SPUD Tapped Horn (2) behind fronts
- Screen
- LG OLED 77"
- Remote Control
- Logitech Harmony One
Klippel's application notes (AN 8 "Intermodulation Distortion Measurement" and AN 10 "Loudspeaker AM and FM Distortion") have been the exclusive domain of Klippel measurement systems, but all are well above the price points associated with DIY home hi-fi audio (~$1500 USD and up).
It would be nice to have an automated on-axis measurement for "intermodulation" (a.k.a., modulation distortion of the two types: AM and FM distortion) for comparing loudspeakers having limited output capabilities (direct radiator drivers) and especially those having horn loading, and also showing the effects of increasing the effects of room boundary gain on lowering intermodulation distortion products at levels above 80 dB at 1 m.
Currently, you have a simple two-tone generator that has been active for a few years (beta release initially), but this capability is well short of that reported by Klippel's own application notes. It seems to me that adding automated dual-tone measurements, (sort of like the stepped sine measurement capability in terms of how long it takes to measure using stepped lower frequency tones and sweeping the higher frequency tones, then stacking the data into a Klippel-like intermodulation graph) would be highly/widely useful measurement capability:
Currently, I know of no other measurement applications that do this other than the very high priced Klippel measurements.
Chris A
It would be nice to have an automated on-axis measurement for "intermodulation" (a.k.a., modulation distortion of the two types: AM and FM distortion) for comparing loudspeakers having limited output capabilities (direct radiator drivers) and especially those having horn loading, and also showing the effects of increasing the effects of room boundary gain on lowering intermodulation distortion products at levels above 80 dB at 1 m.
Currently, you have a simple two-tone generator that has been active for a few years (beta release initially), but this capability is well short of that reported by Klippel's own application notes. It seems to me that adding automated dual-tone measurements, (sort of like the stepped sine measurement capability in terms of how long it takes to measure using stepped lower frequency tones and sweeping the higher frequency tones, then stacking the data into a Klippel-like intermodulation graph) would be highly/widely useful measurement capability:
Currently, I know of no other measurement applications that do this other than the very high priced Klippel measurements.
Chris A
