Purpose-built listening room with loudspeakers, acoustic treatment, and a vaulted ceiling

Rogier van Bakel

Contributing Editor, Stereophile

Listening room& reference system

Dimensions
21 × 15 ft
Ceiling
16 ft peak
Volume
≈ 4,100 ft³
AI render of the listening room from above
AI render of the listening room, top view.

Purpose-built.

A dedicated listening room for two-channel audio, with substantial isolation, acoustic treatment, and dedicated power.

The room replaces a century-old two-car attached garage. Its new shell uses double-thick drywall over Rockwool and mass-loaded vinyl. The hardwood floor sits over a layer of gravel, a 10-inch concrete slab, plywood, and rubber; a large wool rug over a thick felt pad covers about 80 percent of the floor. I wrote a Stereophile piece about what happened before, during, and after construction, and why I feared I’d unleashed some Pet Sematary-style juju after digging up the old foundation.

Acoustic treatments include two eight-foot-tall range-limited soffit bass traps, two skyline diffusers, and more than a dozen wall- and ceiling-mounted absorption panels. Power comes from a dedicated line with 20-amp outlets and 12-gauge wiring to the panel.

Current equipment.

Reference components, loans, and equipment currently under review. This list changes frequently.

Roughly 60 percent of the components and speakers listed here are my
personal reference gear, purchased with my own funds. Others are on
extended loan or in for review and remain the property of their manufacturers.

My policies concerning review samples,
industry pricing, hospitality, and potential
conflicts of interest are set out below.

Loudspeakers

  • Buchardt E50 standmounts
  • ELAC Concentro M 807 floorstanding speakers
  • Focal Utopia Scala Evo floorstanding speakers
  • Monitor Audio Gold 100 6G standmounts
  • Naim Mu-so 2 wireless speaker Dining room
  • Vanatoo Transparent One Encore powered speakers Office
  • Hsu VTF-2 Mk5 powered subwoofer
  • SVS Micro 3000 powered subwoofer ×2

Amplifiers

  • Anthem STR integrated amplifier with ARC
  • Aurender AP20 streaming amplifier
  • Heaven 11 Billie MkIII hybrid integrated amplifier
  • Krell FPB200c power amplifier
  • McIntosh MC462 quad-balanced power amplifier
  • McIntosh MC2375 integrated analog tube amplifier
  • Michi X430 integrated amplifier
  • NAD C700 streaming amplifier Office
  • Peachtree nova300 integrated amplifier
  • PrimaLuna EVO400 integrated tube amplifier Tung-Sol KT150s + Gold Lion 12AU7s
  • QUAD 303 power amplifiers in bridged mono 2024
  • Schiit Ragnarok integrated amplifier
  • T+A Symphonia streaming integrated amplifier

Preamplifiers

  • Balanced Audio Technology VK-90 tubed preamplifier 8 × 6H30 SuperTubes
  • Benchmark HPA4 line stage
  • Holman APT preamplifier
  • PS Audio PMG Series Signature preamplifier
  • QUAD 33 preamplifier 2024

Digital sources

  • Apple 15-inch MacBook Air with M4 chip
  • Apple iPhone 16 Pro Max
  • Apple 13-inch iPad Pro with M4 chip
  • Aurender A20 music server and DAC
  • Bluesound Node 2i streamer
  • Eversolo DMP-A8 streamer and DAC
  • Eversolo DMP-A10 streamer and DAC
  • FiiO S15 streamer
  • Grimm Audio MU2 Roon core/streamer/server with Major DAC
  • HiFi Rose RS520 streamer
  • Musical Fidelity V90 DAC
  • Naim Uniti Atom streamer
  • PS Audio PMG SACD player
  • PS Audio PMG DAC
  • Roon Nucleus One
  • Sony S9000ES SACD player

Analog sources

  • Rega Planar 10 turntable with RB3000 tonearm
  • Rega PL10 PSU power supply
  • Rega Apheta 3 moving-coil cartridge
  • Grimm PW1 phono preamplifier
  • Rega AOS MC phono preamplifier
  • Parks Audio Waxwing DSP phono preamplifier

Headphone DACs, amplifiers, players

  • AudioQuest DragonFly Copper portable DAC/amplifier
  • Benchmark HPA4 headphone amplifier
  • FiiO Q3 portable DAC/headphone amplifier
  • FiiO K17 desktop DAC/headphone amplifier
  • LSA HyperDrive 2 hybrid preamp/headphone amplifier
  • McIntosh MHA100 headphone amplifier
  • RME ADI-2 DAC FS
  • SMSL SP200 THX-888 headphone amplifier
  • Questyle QP1R portable audio player

Headphones and IEMs

  • Apple AirPods Pro 2 and Pro 3
  • Audeze LCD-4
  • Beyerdynamic DT 1990 Pro
  • Focal Clear
  • HiFiMAN HE1000se
  • HiFiMAN Sundara
  • HiFiMAN Susvara Unveiled
  • Moondrop Aria IEMs
  • Oppo PM-3
  • Sennheiser HD 600
  • Sennheiser/Drop HD 6XX
  • T+A Solitaire T

Cables

  • AudioQuest Thunderbird Zero and Bass speaker cables
  • AudioQuest Red River, Black Beauty, MacKenzie, and Thunderbird RCA/XLR interconnects
  • AudioQuest Carbon, Coffee, and Vodka Toslink/coaxial cables
  • AudioQuest WEL Signature and Wild AES/EBU cables
  • AudioQuest Cinnamon and Vodka Ethernet cables
  • AudioQuest NRG-Z3, Monsoon, Blizzard, Tornado, and Hurricane power cables
  • Blue Jeans Canare 4S11 speaker cables
  • Blue Jeans Belden 1800F XLR interconnects
  • Clarus Crimson power cables and RCA/XLR interconnects
  • RSX power cables

Isolation and power

Vibration control

  • IsoAcoustics Gaia speaker feet
  • Townshend Seismic Podiums

Power

  • AudioQuest Niagara 5000 Low-Z power noise-dissipation system
  • AudioQuest PowerQuest PQ-909 and PQ-707
  • Austere surge protectors
  • Clarus Concerto MkII power conditioner
  • Nordost QSINE and QWAVE plug-ins
  • Puron AC Enhancers

Room treatment

  • Acoustimac 14 absorption panels, including clouds
  • Bamboo BG Two skyline diffusers
  • GIK Eight-foot rectangular range-limited soffit bass traps in the front corners
  • PSI Audio C214 active bass traps ×2

A/V

  • Apple TV 4K, second generation
  • LG G3 77-inch MLA Evo 4K OLED TV

Software

  • Anthem ARC
  • Audirvāna Studio
  • Dirac
  • Tidal
  • Qobuz
  • Room EQ Wizard
  • Roon ARC
  • Roon 2.0

Furniture, stands, and accessories

  • Bosch GLM 20 Blaze laser measure
  • Codia Acoustics T1 Silver headphone stands
  • Eames leather lounge chair and ottoman
  • Finite Elemente Pagode amp stand
  • Hulala cabinet/equipment stand
  • HumminGuru ultrasonic record cleaner
  • iFi LAN Silencer
  • Luxman AS-4 III line selector
  • Mahal hand-knotted antique Persian rug, 10.5 × 17.5 ft
  • Natuzzi Italia leather sofa
  • Real Flame Beau Landscape fireplace
  • Solidsteel SS-5 speaker stands
  • Walker Edison media console Reinforced and modded
  • Zara Home open turntable cabinet with custom soapstone top

What I will and won’t do.

The commitments below are my own. I’ve drafted them as an extension of Stereophile’s editorial standards and principles, which you can read here. I also adhere to the guidelines of the Association of International Audiophile Publications (AIAP).

Rogier van Bakel in his listening room, wearing a Stereophile cap

1. Long live the wall between editorial and advertising.

I neither know nor wish to know which brands advertise in Stereophile. I like it when manufacturers never identify themselves to me as current or future advertisers. If they do, it’s highly unlikely to positively influence what I write. Read my lips.

2. When and why I suggest products for review.

When I recommend something for review to Stereophile’s editorial team, I do so because the product seems interesting. Sometimes I’ve heard it and was impressed. I don’t propose reviews because a company has been generous with me or because I have a good relationship with the people who work there. Final decisions about what Stereophile will cover always rest with the Editor.

3. No pay-to-play, ever.

Stereophile pays me for my articles. No one else does. I won’t accept compensation or favors in exchange for a review, an interview, show coverage, etc. Likewise, to avoid conflicts of interest, I won’t perform any work (including writing, editing, consulting) for manufacturers, importers, or dealers. However, I may help them carry a heavy amplifier up a flight of stairs, entirely for free. It’s complicated.

4. Review samples don’t stick around.

I get review samples directly from the manufacturer or distributor, and typically keep a product for two to four months, until my article is finished and ready to go to press. All samples are returned then, unless I’ve made arrangements with the manufacturer for an extended loan. Per Stereophile policy, when a company asks for a product back, I comply promptly and return it in like-new condition. I do not sell review samples.

5. Industry accommodation pricing: Yes, but—

If I want to buy a product I’ve reviewed, I’ll do so at accommodation pricing if offered. Such pricing is not a special favor to reviewers; it is broadly available to people who work in the industry. Nor is it a gift: the company receives payment much as it would from a dealer sale, and that includes a profit margin. I never discuss a purchase with the manufacturer or importer until after the review is finalized. I honor all resale restrictions on accommodation purchases, whether informal or contractual, including minimum hold periods. What I buy at a discount, I will not sell at a profit.

6. Hospitality happens; automatic coverage doesn’t.

Once or twice a year, I'm invited to go on a factory tour whose expenses may be covered, in whole or in part, by my hosts. There are no quid pro quos: when I accept such a trip, I make it clear, pleasantly and appreciatively, that I don't guarantee coverage. Yes, I've visited companies I never wrote about, before or after.

7. I don’t play favorites

I apply the same standards and criteria to each product I review. Admiration for a brand’s history or affection for the people on its team may shape my expectations, but neither entitles a product to leniency. This is my policy, not Stereophile’s: I will not review products from companies whose principals have bullied writers, threatened reviewers over good-faith criticism, or otherwise demonstrated contempt for the people who cover them.

8. …but reciprocity bias is real and I’m not immune.

Continued use of borrowed equipment requires an ongoing relationship with the companies or individuals in question. Long-term loans, factory visits, and simple human warmth toward people I've come to know and like: all of these create the conditions for reciprocity bias. I actively guard against it, with the same confidence a man has that he doesn't snore.

9. I rave, I rant.

Though I love high-end audio, not everything I write is a rave. An unenthusiastic assessment is not a personal attack. I will write critically when the product, in my subjective experience, falls short. Such an opinion is never intended to hurt the manufacturer, though it might; it is meant to serve the reader. I prefer honest praise over plaudits tossed around like confetti. Not every product should be quietly nudged toward “recommended.”

10. Manufacturers don’t get to approve my articles.

Manufacturers or distributors almost always receive a copy of my Stereophile review before it goes to press, for fact-checking purposes only. We ask them to confirm company history, specs, features, pricing, and similar verifiable details. That’s where their access and influence ends. They’re not entitled to make changes to my subjective assessments.

With affection toward all who make, sell, or report on superior hi-fi,

Rogier van Bakel
Contributing Editor, Stereophile