Description

 I prioritize the midrange and use class A amplification with a tube preamp and solid state power amps feeding 2.5 way speakers with direct-coupled midrange drivers. 

A balanced dual-mono approach in the DAC and amplification chain, along with an optical cartridge for pure analog, provide for an exceptionally clean signal to the speakers with minimal crosstalk. Digital hygiene is provided by redundant clocks, linear power supplies, and only ethernet and fiberoptic connections.  

I have tried to attenuate mechanical, electrical and acoustic interference. Stands, speaker bases and footers address mechanical energy. Electrical integrity starts with a whole house surge protector/noise filter followed by three dedicated circuits, one for digital, one for both power amps and one for everything else. Extensive room treatment then ensures that the sound that reaches the listener is relatively free of acoustic anomalies. 

The final pictures show how a four-subwoofer array contributes to a smoother and extended low end (Fig.1), as well as a reduction in room modes (decay times) (Fig. 2-5). Active bass traps do not do much with the frequency response (Fig. 1), but they have a significant impact on modal frequencies/standing waves (Fig 2-5). Turning them on is akin to activating a subwoofer. Absorption and diffusion room treatments put the room "within spec" at the higher frequencies (Fig. 6). 

But the real magic comes from the midrange, running "full range" from below 200 Hz to above 5 KHz without a crossover.   
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Room Details

Dimensions: 28’ × 18’  Large
Ceiling: 8’


Components Toggle details

    • Roon Labs Nucleus Plus Server
    Tony Pardo LPS; Qobuz
    • Nagra Streamer
    • Playback Designs MPD-8 DAC
    Fiberoptic N-Link from Nagra Streamer
    • DS Audio DS003 Cartridge and Equalizer
    • Eminent Technology ET2 Tonearm
    High pressure manifold with upgrades; manometer
    • VPI Industries HW-19 MkIV ÜnStock Turntable
    Black Diamond Racing Shelf for the Source; Boca ceramic bearing; Sota Total Eclipse SAMA with Sota LPS; modified base and suspension with Black Diamond Racing Cones, Rotalocks, and Herbie's Audio Lab Tenderfeet and Pucks. 
    • Vinnie Rossi L2 Signature DHT Preamplifier
    Western Electric or Takatsuki 300Bs
    • JL Audio CR-1 Crossover
    • Pass Labs XA 60.8 Amplifiers
    • Wilson Benesch A.C.T. 3zero Loudspeakers
    • Townshend Seismic Isolation Podia
    Wilson Benesch A.C.T. 3zero
    • Dayton Audio SA1000 Subwoofer Amplifiers
    • James Romeyn DEBRA Subwoofer System (aka Swarm)
    Four subs/distributed bass array with 10 inch drivers
    • IsoAcoustics GAIA III Footers
    James Romeyn DEBRA (Swarm)
    • Nitty Gritty Model One Record Cleaning System
    Original version with motorized capstan and vacuum
    • SolidSteel Equipment Racks
    HF Series 4-shelf rack
    HF-A amp stands
    410 rack
    • PSI Audio C214 AVAAs
    Active Velocity Acoustic Absorber bass traps
    • Vicoustic Room Treatment
    Multifuser Wood 64 MkII: front and side walls
    FlexiWave Ultra: front and side walls
    Multifuser DC3: ceiling
    Super Bass Extreme Ultra: front corners
    Ultra Wavewood: front and side walls
    Cinema Round Premium: ceiling
    • GIK Acoustics Room Reatment
    242 Acoustic Panels: side walls and ceiling
    Polyfusors: side walls
    Turbo Trap Pros: rear corners 
    B4 Acoustic Panels: side walls
    244 Acoustic Panels: side walls
    Gotham Quadratic Diffusers: rear wall
    • Acoustimac Room Treatment
    Side wall and doors
    • Preston Area Rug
    Wool, handmade, cut pile, 9' x 13', 1/2" with  3/8" felt pad
    • MiniDSP UMIK-2 Microphone
    REW
    • Indiana Michigan Power
    3 dedicated 15 amp circuits
    • Environmental Potentials EP-2050-EE Surge Protector
    Whole house surge protection and filter
    • Zero Surge Power Filter
    8 outlet 
    2 outlet
    • iFi Audio Power Supply
    iPower Elite to Xfinity modem/router
    • AudioQuest Niagara 1200 Power Conditioner, Vodka Ethernet Cables
    Vodka: Xfinity modem to Nucleus Plus and to Nagra Streamer
    • Empirical Design Cables

    ED 422X XLR: MPD-8 to L2S to CR-1

    ED 422AX XLR: CR-1 to XA 60.8

    ED 422 RCA: DS003 cartridge to equalizer to L2S

    ED Omniwire RCA: CR-1 to SA1000s 

    ED 213 Speaker Cable: bi-wired XA 60.8 to ACT 3zeros

    ED 416X Power Cords: XA 60.8s, Niagara 1200, L2S, MPD-8, CR-1, DS 003, Tony Pardo, Swagman Labs

    • Furutech Power Cords
    DIY to SA1000 subwoofer amplifiers

Comments 26

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Owner
Thanks for commenting. I do enjoy the sounds it produces and I probably spend 2 to 4 hours a day listening to it. It's that pleasurable.

Since I still occasionally listen to vinyl, I need a separate preamp and I would probably miss the qualities that a valve front end gives me. I've not tried because I am still enamored of the current set up. As I become bored and continue my tweaking, I may well but at this point I'm not sure I want to since the thought of swapping cables every time I wanted to listen to vinyl is not appealing.  If I were to go without a separate pre-, and still wanted an analog input, I would probably do the MPD – 8AI. 

I recognize it's all a matter of taste, but the Playback Designs unit has me unwilling to get off my butt and change records.

tcutter

Owner
Thank you. I like the wood diffuser on the front wall because it looks nice it makes a difference in the sound stage and overall clarity. 

Obviously, I am in the camp that believes that crossing over your mains with a high pass has advantages over running the mains full range and just adding the subwoofer. I believe the JL audio unit did this better than any others. For the price anyway

I biamped my system with the monoblocks high passing to the Vectors at 80 Hz and a distributed base array picking up a low pass also at 80 Hz. While  there are other crossovers out there, Marchand, Pass Labs, and others, I felt the CR-1 provided the best quality and features. Infinite crossover points, volume control, A-B switching (with/ without subs), and "damping", which allows one to control the bandwidth of the crossover point. It only has second and fourth order slopes and they have to be the same which is a little disappointing but certainly not a dealbreaker. I use Dayton SA 1000 subwoofer amps which provide a little more control over the final sound.


tcutter

Owner
Owner
(Hit post too soon)

Proac Tablettes, and Linn Isobariks (terrible speaker). Read about Wilson Benesch and the science behind their design appealed to me so I tried a pair of Trinities. Magical, but bass shy.  The Vectors were from the next generation and shared components with their top-of-the-line speaker, The Cardinal. They design virtually all of their components and manufacture something like 90% in house. Their form factor is very similar to Magico, but while Magico uses the brute force of a big block of aluminum to house their drivers, Wilson Benesch uses technology and carbon fiber. I get the impression it is virtually the same stiffness in a much more compact and lighter package. They also use a 2 1/2 way design that allows the mid range to operate without a crossover, which I think is responsible for some of their coherence. I will not call them the poor man's Magico because I think they stand on their own and can directly compete, although it a lower price point.

They are not well known in the United States and their marketing is weak but I believe they are very popular in Europe and even more so in Asia. They don't need the US market. I would say it is our loss.

tcutter

Owner
I know many people  emphasize tweaking cables, power cords, fuses, etc. I've been putting my money into room treatments and once that gets settled (if ever), then I'll start looking at the more subtle tweaks. Room treatment can make a significant difference, far more than electronics and tweaks. The skyline diffusers on the ceiling made the room open up.Next to speakers, I don't think anything influences the sound more. 

I can say I've always been fond of the British sound having owned Kef 101s and 105.2s, Proacp

tcutter

Owner
Imitation is the sincerest form of flattery ;)

I mounted them differently than what Vicoustic recommends and am happy to share that with you via PM if you would like.

tcutter

Owner

Sorry. My reply did not paste well. Here are the details. 


Vicoustic:

Front wall: Multifuser Wood 64 MkII and Flexi Wave Ultra

Ceiling: Multifuser DC3

Front corners: Super Bass Extreme Ultra

Front and Side Walls: Wavewood Diffuser Ultra MkII

tcutter

Owner
Thank you. The treatments are listed below. For much of the Vicoustics products, I have used a German  company. Even with shipping, the prices are superior to domestic suppliers. 

    • Vicoustic Various
    Front wall: Multifuser Wood 64 MkII and Flexi Wave Ultra
    Ceiling: Multifuser DC3
    Front corners: Super Bass Extreme Ultra
    Front and Side Walls: Wavewood Diffuser Ultra MkII
    • GIK Acoustics Various
    Side Walls: 242 and 244 Acoustic Panels
    Rear (screen) Wall: Gotham 23 Quadratic Diffusers
    • Acoustimac Acoustic Panels
    Side wall and doors

tcutter

Owner
Thanks. I see we share some of the same approaches to our hobby, but your system is way more developed than my relatively modest set-up.

tcutter