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Agnew, Ray Chelstowski, Andrew Daly, Harris Fogel, Jay Jay French, Tom Gibbs, Roy Hall, Rich Isaacs, Anne E.

We close the issue with a seal of approval, heavenly blues, and a stairway to knowledge. Johnson grooves to jazz bass legend Ron Carter, and recent recordings of pre-Baroque composer Tomaso Albinoni. Howard Kneller dreams about an $8,200 power cord. We run Part One of FIDELITY magazine’s Munich HIGH END 2023 show report. Harris Fogel visits high-end headphones maker Audeze. Agnew pushes the limits of recording audio. Russ Welton asks: can we expand the ways in which we listen to music? J.I. Andrew Daly talks with indie rocker Joe Cannon of Resurrectionists, and Gideon King of New York City’s soulful Gideon King & City Blog. I cover Octave Records’ The Art of Hi-Fi Volume 02: Soundstage, and talk with Paul McGowan about the topic. In this issue: Don Lindich has another look at AXPONA 2023. That’s news in itself, but there’s more: these versions will for the first time include the complete concert, with two previously-unreleased songs, “Cities” and “Big Business/I Zimbra.” Heaven is a place where something sometimes happens. This just in: Stop Making Sense, the iconic Talking Heads live concert film, will be re-released on August 18 in a restored 4K version courtesy of A24, in tandem with 2-LP, digital, and Dolby Atmos releases from Rhino. Simple, effective, yet shouldn't present a compromise to your TV picture. But, even with all grounding up to code, I always use a capacitive isolator in my CATV line. If in doubt, call a licensed electrician and/or your cable TV company. A CATV isolator should not be used as a band-aid to cover up a potentially dangerous situation caused by improper or failed grounding of your CATV line or your house electrical system (I once saw a difference of 50 VAC due to a failed cable TV ground!). It only takes a small difference in potential to cause hum in your audio system, but if the difference is more than a few volts, I suggest finding the root of the problem. I suggest checking the AC voltage difference between your cable TV ground and power line ground before adding the isolator. For those who can't build one themselves, Jensen Transformers offers an excellent capacitive isolator, VRD-1FF ( It's actually the only product Jensen makes that isn't a transformer. That way, your A/V system is also isolated from your cable modem. Insert the isolator between the cable TV outlet in your A/V room and your CATV or DVR box. A 630 VDC / 400 VAC version is also available, Digi-Key #495-1318-ND.

I used Epcos metallized polypropylene, Digi-Key #495-1279-ND. The capacitors should be film types with a rating of 250 VDC / 140 VAC, in countries where the line voltage is nominally 120 VAC. The F-connectors and capacitors can be housed in a small plastic project box, such as a Hammond 1591L, Digi-Key #HM100-ND. When terminated with a 75-ohm load, the isolator provides a low-loss signal path in the RF region while appearing very high-Z at the line frequency and the low-order harmonics likely to cause buzz. All you need are a pair of 2.2nF capacitors - one in the signal line and one in the ground line. Reader Gary Galo came up with a better solution, one that does not come with such a price to pay.ĬATV grounding can be a menace to audio systems and, as you point out, isolation transformers can be a problematic solution due to the losses involved.Ī better solution is to use a capacitive isolator. Most CATV isolation transformers have a price to pay because of their limited bandwidth: poorer picture quality for higher speed HD signals. I typically recommend a CATV isolation transformer but I also make that suggestion with a cautionary note. Remedying it at the source is the best way to solve the problem. If you have satellite TV like Direct it's not a problem, but if you're connected to the cable and that is connected in your system at any point, chances are good you have a ground loop. I mentioned one of the biggest offenders of hum creation in our systems through a ground loop comes from the cable TV connection.