On October 10, 2022, Dr. David Robinson, Editor-in-Chief of “Positive Feedback” announced that RSX’s BENCHMARK AC Power Cord had earned that magazine’s [su_tooltip title=”Brutus Award” text=”“My time with the Benchmark in tandem with the Power8/Beyond AC Power Cord on the one hand and the PS Audio DirectStream DAC and PerfectWave Transport on the other in our office/desktop reference system was a real revelation to me, showing how much bang-for-the-buck the Benchmark offered. It was easy to give one of my Brutus Awards for 2022 to RSX Technologies for such excellent designs.’ — Dr. David Robinson, Editor- in Chief, Positive Feedback” background=”#dff808″ color=”#000000″]Brutus Award[/su_tooltip] for outstanding value.

Additional praise comes from hi-fi+ by way of Alan Sircom’s BENCHMARK ER-20 Power Cord review.

“If you need a solid and reliable yet eminently affordable, er, benchmark in power cords, the RSX Technologies Benchmark ER-20 fits the bill. It takes much of the technology that makes high-end RSX cables successful, boils those concepts down to the key salient points and retains many sonic benefits in the process. Job done!” 

— Alan Sircom hi-fi+ (September 26, 2023)

You can read the review here.


BENCHMARK ER-20 is something new to RSX. Hand terminated, like all other RSX cables, it’s the first RSX cable ever specifically designed to have its all-important conductor assembly machine made instead of hand-crafted from multiple components. This saves hours of hand labor and allows RSX to devote more of its production budget to better sound. BENCHMARK AC Power Cords are now available in standard 6 ft. lengths and in 3 ft. lengths to avoid system clutter and the inductive losses that coiling excess cable length can produce.

“At $200.00 per, this is one of those rare no-brainers in high-end audio. Benchmark is a price-performance killer!” – Dr. David W. Robinson, Editor-in-Chief Positive Feedback Online


Setting a New Standard

BENCHMARK truly is a benchmark product. Laboratory-grade™ copper, low dielectric constant, high dump-rate primary insulation, Balanced-Field™ geometry, 100% coverage shielding, special outer jacketing, and highest quality gold-over-pure-copper connectors are all used in BENCHMARK ER-20 Power Cords to give clearly audible performance far beyond its modest price point. BENCHMARK ER-20 IS THE new standard for affordably priced AC Power Cords.

For even [su_tooltip title=”Better Performance” text=”Greater upper frequency clarity and detail while still retaining BENCHMARK’S phenomenal dynamics and ‘punchy’ bass.” background=”#dff808″ color=”#000000″]better performance[/su_tooltip], RSX will soon be offering a cryogenically frozen version of the BENCHMARK AC Power Cord at only a very slight increase in price. Contact RSX or your dealer to learn when this will be available. 

Pairs Nicely With Power8™

The Power8™AC Power Box is one of RSX’s  best selling products. It seems that nobody ever has enough high-quality power outlets, and Power8 is a great way to add more. It needs a power cord to connect it to the wall, though, and BENCHMARK ER-20 is an easy and affordable way to get some of the kind of award-winning sound that Bob Levi described as follows:

“(The Power8)…was indistinguishable from my $3,500 and $7,000 power conditioners..” – Bob levi (1/29/2020 Positive Feedback Power8 review.)