Steve Guttenberg gives open-baffle speakers the wall-of-sound treatment
The Quartet 15 review pairs John Williams and the Rolling Stones with amplifier comparisons and a viewer's Calgary system.
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Pure Audio Project Quartet 15 Speaker Review
Things we can learn from the video
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- 0:05The Quartet 15 uses an open-baffle dipole design, radiating sound from both front and back.
- 4:24Placement considerations include moving the speakers on casters and using the standard IsoAcoustics Gaia feet.
- 5:33Guttenberg tests amplification from Pass Labs, SPL, Dynakit and First Watt.
- 7:49John Williams' film score and the Rolling Stones supply listening tests for scale, bass and clarity.
- 12:09Comparison with the Duet 15 explores the larger speaker's presentation, alongside recollections of the Klipsch La Scala AL6.
- 15:55Nicolas Repac's Swing-Swing is the album recommendation, followed by Jim's Calgary system at 17:24.
A speaker without a conventional box gives Steve Guttenberg plenty to listen for. In "Pure Audio Project Quartet 15 Speaker Review," his only new upload of the week, he describes a dipole design sending sound backward as well as forward: "And it produces, well, a wall of sound."
These are substantial speakers with an equally substantial starting price, $19,500 a pair in the US. Guttenberg works through placement, amplification and the listening itself, using John Williams' Close Encounters of the Third Kind score and the Rolling Stones' Love You Live. His distinction is tactile: the speakers don't merely reproduce bass, he says, they let him feel it. A comparison with the smaller Duet 15 brings the verdict, "The music just breathed more."
The review has reached about 50,000 views and is drawing the strongest daily audience among his active uploads. September's Klipsch Rebellion review and the more recent Tri-Art TA-2 turntable review follow at a gentler pace. Across the channel, subscribers were unchanged over the week, while daily views are somewhat below their usual level. Weekly viewing landed close to Canoopsy's, with JSL Review having a much larger week.
The conversation beneath the Quartet review extends beyond the equipment on test. Owners describe adjusting to open-baffle sound, while another viewer spots a tuner in the featured system. Guttenberg finishes with Nicolas Repac's Swing-Swing as his album recommendation and Jim's Calgary setup, giving the big-speaker discussion a fellow listener's home-system finish.
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What viewers say
Nice to see a tuner in the system of the day!
@OgamJanSee it on YouTubeI have a pair of the Quartet15s and love them. I have been waiting for this review to drop so I could hear your opinion. They are amazing.
@daleromney6062See it on YouTubeThanks for the Nicolas Repac recommendation, Swing-Swing is a trip!
@jamesmyers6838See it on YouTube
4 more comments
That's a gorgeous viewer system of the day
@johnkeenan9495See it on YouTubeThank you so much Steve for all the work you do.
@biggregyoSee it on YouTubeMy 1972 Ohm F’s fill the room with sound like no other
@stinkenstineSee it on YouTubeI had the Infinity RS IIb speakers in the mid-1980s. They were (sort of) the best of both worlds, with open baffle ribbon mids and highs, with (2) 10" woofers, below. If it weren't for the foam surrounds on the low end, they were phenomenal.
@gooddaysahead1See it on YouTube
Public comments from the video's page on YouTube
The videos drawing views on Steve Guttenberg Audiophiliac right now
- Subscribers
- 280,000
- Channel views, last 7 days
- 199,205
- Videos published this week
- 1
- Video published
- November 4, 2026
- Video views so far
- 50,402
- Views on its first day
- 32,566
The numbers
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💡 Test your knowledge
Which Rolling Stones album does Guttenberg use in the Quartet 15 listening tests?
The review uses the Rolling Stones' live album Love You Live alongside John Williams' film score.




