Description

The primary goal of this room and equipment is to create a dedicated listening room purposed to optimize music playback. Software consists of SACD discs, a music server containing DSD and high resolution Flac files, and ripped RBCD's.

A house addition that included a dedicated media room was completed February 2015.

Acoustic Frontiers (Nyal Mellor) established the optimum room size consistent with the house addition, designed the room acoustics and provided optimum inside wall dimensions.

The media room acoustic "foundation" consists of an isolated wall system comprised of 130 Kinetics IsoMax clips attached to 1-1/2" furring strips nailed to CBS blocks on all four walls. 440 linear feet of 25mm hat channel is supported by the isolation clips. R-11 open faced fiberglass (3-1/2" thickness) fills the empty areas between the CBS walls and drywall. Soundboard XP damped drywall is attached to the hat channel. Acoustic sealant seals the areas between the top, bottom, corner areas of the damped drywall.

The ceiling utilizes Soundboard XP attached to the ceiling joists. The media room attic has R-38 fiberglass insulation. A knee-wall with attached R30 fiberglass insulation separates the media room attic and the original structure interior attic area.

The A/V electronics are served by a dedicated 100A electrical sub-panel with (4) 20A circuits and 20A Furutech GTX-D duplex receptacles. Twisted pair wiring (#12) is used for each circuit with the neutral and hot wires wrapped on 2" centers and the ground wire placed parallel in PVC conduit. A paper presented at the 2010 AES 129th Convention shows this method has the lowest ground voltage induction tested.

The media room has a dedicated 1-1/2 ton A/C system. Large exhaust ducts in each room corner, and a large return duct on the rear ceiling leading to the air handler/evaporator minimizes room noise.

Acoustic Frontiers incorporated my existing Rives Audio ceiling "clouds" and using room dimensions and frequency measurements specified the interior room acoustic products and locations. The acoustic design creates a flatter frequency response; lowers the room reverberation time; and provides bass trapping. Clarity, sound staging, and imaging are all improved while keeping the room as live as possible.

The interior acoustic panel positioning:
- Ceiling: (4) 6'x6' wood frame acoustic "clouds" hung with all thread from the ceiling joists room centered. Each wood frame consists of (4) 2'x4' RPG BAD panels supported by the frame support structure. UltraTouch R19 sound absorption batts are placed on top of the structure.
- Front wall: (2) 39"x59" RPG Modex type 1 plates (outward positions), (2) 39"x59" RPG Modex broadband panels (inward positions). Panels with 6" spacing except at side walls, hung 23" from floor.
- Side walls: (3) 2'x2' RPG BAD ARC panels @ the L/R wall first reflection points; (3) 2'x2' Listen Audio natural birch diffusers @ the L/R 2nd reflection points; (3) 2'x2' Listen Audio natural birch diffusers flanking the listening positions on the R sidewall and behind the listening positions on the L sidewall. All panels hung 18" from floor.
- Rear wall: (1) 6'x6'x12"d absorber box (R38 fiberglass filled) centered. The existing floor standing RPG BAD panel templates wrapped with acoustic cloth attached to the front of the absorber box. The absorber box is hung 26" from the floor.

Room dimensions, equipment positions, D3 Measurements: see Media Room Floor Plan drawing in photos.

A JL Audio F212v2 subwoofer has been volume matched and phase degrees aligned with a 90Hz crossover, DARO applied. DH Labs SubSonic II RCA cables are connected to the F212v2 from the JL Audio CR-1. The CR-1 is set with a 24 dB octave slope. The (3) D3 bass ports have are plugged with closed cell poly foam to prevent front wall reflections. The system has a palpable low end that blends completely with the stereo speakers. The stereo amp no longer has to support low bass, and the mids and highs from my D3s are appreciable improved.

A JVC RS2000 front projector is suspended from the rear ceiling; Definitive Technology SR-8080BP surrounds are hung on rear left/right walls 6' above the listening position, and a DaLite JKP Affinity 16:9 (67.5 X 120" viewing area) motorized screen hung from ceiling at the front wall.

A solid "system foundation" ensures optimum performance of audio equipment:
- precise stereo speaker positioning relative to front, back, parallel walls; the listening position; and away from obstacles;
- Room acoustics designed to minimize sound reflections and room modes that can "smear" audio and create spikes and nulls;
- a 100A sub-panel with (4) Dedicated 20A A/V circuits;
- Synergistic cabling (PC's, IC's, SC's) ensures design continuity throughout the electrical path;
- Resonance control to isolate audio equipment EMI and vibration.

Thick wool area rugs with jute are used to partially cover wood floor surfaces at the rear wall, and between the listening position and speakers.

White LED strip lights at the outside perimeter of the ceiling "clouds" provide general purpose room lighting. Blue LED strip lights around inside perimeter of the ceiling "clouds" provide mood lighting.

Read more...

Room Details

Dimensions: 19’ × 15’  Medium
Ceiling: 11’


Components Toggle details

    • Raidho D3 Speakers
    (1) sealed ribbon tweeter; (1) 100 mm Diamond Midrange driver; (3) 115 mm Diamond Bass drivers; Piano Black
    • Boulder 1160
    PEAK POWER, 8 OHMS, 300W; 4 OHMS, 600W; 2 OHMS, 1200W
    Output power can drive any reasonable loudspeaker to realistic levels.
    • JL Audio Fathom 212V2
    Powered, sealed-box subwoofer. Drive-units: two 12-W7 12" cone woofers with 3.5"-diameter voice-coil and 3" peak–peak excursion:
    - Amplifier: switching, class-D, 3600W RMS short-term;
    - Dimensions: 31.96" H X 14.92" W X 20.39" D. Effective cabinet volume: 574 in;
    - Weight: 224 lbs;
    - DMA-Optimized Motor System;
    - DARO optimizing system;
    - LP Frequency/slope adjustment;
    - ELF adjustment;
    - Phase Alignment 47 degrees
    • EMM Labs DV2 Integrated D/A Converter
    • Proprietary & discrete dual differential D-to-A converters (MDAC2™)
    • New high resolution volume control system with automatic output gain control (VControl™)
    • Latest generation Meitner Digital Audio Translator signal processing technology (MDAT2™)
    • Enhanced technology for instant signal acquisition and jitter-free performance (MFAST™)
    • Proprietary asynchronous clocking system (MCLK2™)
    • USB interface with custom hardware galvanic isolation isolates the DAC from any dirt that may be passed along from the external source. Asynchronous input circuitry now supports PCM up to 24-bit/192kHz, DSD, 2xDSD, DXD (352/384 kHz), and MQA via the USB input.
    • User controlled signal polarity
    • Custom aerospace-grade ceramic circuit boards
    • EMM Optilink for connection to an EMM transport

      Excellent writeup of EMM Labs design philosophy and build quality:
      https://6moons.com/audioreview_articles/ansuz/
    • EMM Labs XDS1v2 SACD/CD Transport
    Used exclusively as a CD/SACD transport using EMM Labs OptiLink cable (AT&T fiber optic).
    The XDS1 retains these capabilities as a stand alone device:
    2-channel CD/SACD/DAC, discrete Class A circuitry, all output.
    - 2014 V2 factory upgrade, all new COAXIAL, TOSLINK, AES and USB inputs. Each able to support up to 24bit 192kHz. USB input also supports DSD streaming as well;
    - 2015 MDAT2 firmware upgrade, an improved new DSP engine with:
    • Increased sonic detail from all digital audio streams (PCM and DSD) using new high-resolution algorithms.
    • Time and frequency response filters that are greatly optimized.
    • A new signal processing engine built for very high-precision audio up-sampling (2xDSD up-conversion).
    • A new more accurate 2 x DSD up-sampling algorithm.
    • Ansuz Acoustics Mainz8 D-TC
    Greatly improved the sound dynamics and articulation. Ansuz offers four price levels of these power distributors: Mainz 8 A2, C2, D2, DTC.

    Ansuz dislikes power conditioners based on transformers, capacitors, and inductors. Instead of filtering AC, their open coils attenuate the peaks of transients atop the 50/60Hz wave to soften the HF spikes and change the shape of the noise. A transient in a coil creates a current which the counter-rotating coil cancels.

    Excellent writeup of Ansuz power conditioning and distribution philosophy and implementation:
    https://6moons.com/audioreview_articles/ansuz/
    • JL Audio CR-1
    CR-1 acts an audiophile-grade “bridge”, seamlessly connecting a two-channel audio system with a top-flight, powered subwoofer system. Powerful features and a pristine, all-analog signal path make it a key component in optimizing an audio system’s spatial and spectral performance.

    Stereo frequencies <91 Hz from the EMM Labs DV2 XLR output are redirected from the Raidho D3s to the JL Audio F212v2. The CR-1 also uses the Integra DTC-9.8 full range stereo to reproduce movie soundtracks.

    Eliminated transient intermodulation distortion in the JRDG 625 and Raidho D3s, JRDG 625 has more current reserve to produce mids-highs, D3s reproduce cleaner and more dynamic mids-highs.
    • Ansuz T2s
    (6) Resonance Control
    - (3) EMM Labs DV2;
    - (3) Ansuz Mainz8 DTC Power Distributor
    • Ansuz Acoustics Darkz DTC
    (6) Resonance control:
    - (3) EMM Labs XDS1v2
    - (3) JL Audio CR-1
    • Ansuz Acoustics Darkz Diamond
    (5) Darkz D resonance control supporting:
    - (3) Pioneer BDP-62FD Blu-ray Player;
    - (2) Adcom Amplifier
    • Nordost Ti Pulsar Points
    (12) Resonance control:
    - (8) Raidho D3
    - (3) Marantz 7705 Pre/Pro
    - (1) Unused
    • SolidTech ROS Ref 4 Equipment Rack
    Used with Ultrasonic acrylic led shelves for additional stability, resonance control, and -aesthetics, to support:
    - Toshiba Laptop (music server)
    - EMM Labs XDS1;
    - EMM Labs DV2;
    - JL Audio CR-1
    • Toshiba Portege R825-P70
    Windows 10 based laptop optimized as music server using JRiver MC19. Connected to EMM Labs DV2 via 1M Kimber Kable AG USB B-bus.

    The EMM Labs XDS1v2 software removed and the DV2 USB software applied.
    • Ansuz Acoustics C2 1.5M XLR IC
    EMM Labs DV2->JL Audio CR-1
    • Nordost Valhalla 5M XLR IC
    JL Audio CR-1->Boulder 1160
    • Kimber Kable AG USB B Bus
    Toshiba laptop music server->EMM Labs DV2.
    • Nordost Valhalla-2 4M Speaker Cable/spades
    Boulder 1160->Raidho D3s
    • Ansuz Acoustics C2 2M 15A PC
    Furutech GTX-D NCF->Mainz8 D-TC Power Distributor;
    Mainz8 D-TC Power Distributor->EMM Labs DV2
    • Ansuz Acoustics A2 2M PC
    (2) Ansuz A2 Power cords:
    - Ansuz Mainz8 D-TC->EMM Labs XDS1v2
    - Ansuz Mainz8 D-TC->JL Audio CR-1
    • Nordost Valhalla 2M 15A PC
    20A Duplex Receptacle->JL Audio F212v2
    • DH Labs Sub-Sonic II
    JL Audio CR-1->JL Audio F212v2
    • DH Labs Silver Sonic BL1 Series II
    (2 RCA) Integra DTC 9.8 AVP->JL Audio CR-1 (stereo L/R)
    (2 XLR) Spare
    (2 RCA) Spare
    • DH Labs Silver Sonic BL-1 Series I
    (2 RCA) Integra DTC 9.8 AVP->Acurus 200X3 amplifier (rear surrounds).
    • Furutech GTX-D NCF(R)
    includes 104-D carbon fiber finished outlet cover, and GTX aluminum CNC processed chassis; shields against RFI (Radio Frequency Interference). Material thickness: chassis plate 13.0mm. Finish non-resonant coating. Special Teflon damping foil and SUS Receptacle fixed screw 4 pcs (M3) and SUS Plate fixed screw 2 pcs (50mm overall length). • Dimensions: 135.0mm (L) x 86.0mm (W) x 13.0m
    • SolidTech Radius Solo 3 Rack
    Supports:
    - Integra DTC-9.8;
    - Sony/UBP-X800 BD/Streamer;
    - Ansuz Mainz8 D-TC.
    • JVC DLA RS2000 Front Projector
    Native 4K (4096x2160) home theater projector that features new, 0.69 inch D-ILA devices coupled with a 17-element, 15-group all-glass 65mm lens. It offers dynamic contrast of 800,000:1, high brightness (1900 lumens), and a host of color reproduction features that ensure dynamic and realistic images.

    Ceiling hung.
    • DA-LITE 16:9 Tensioned Screen JKP Affiinity
    67.5 X 120" Viewing Area
    • Marantz AV7705
    • Dolby® and DTS® surround sound decoding
    • video upscaling (up to 4K) for analog and HDMI sources
    • Audyssey MultEQ® XT32 speaker calibration and system optimization
    • Marantz's Hyper Dynamic Amplifier Module (HDAM) offers improved dynamic range and detail while reducing noise
    • high-quality 32-bit DACs on all channels
    • 4K/60p and 3D video pass-through
    • 17-3/8"W x 7-5/16"H x 16-15/16"D
    • weight: 22.9 lbs.
    • Sony UBP-X800
    Ultra HD Blu-ray Player. Used to stream NetFlix and Blu-ray discs.
    • Acurus A-200 x3 Amplifier
    Used to drive B&W CCM80 rear surround speakers.
    • Definitive Technology SR-8080BP
    - (2) Surround speakers mounted 1' behind and 2' above the L/R sidewalls from the listening position.
    • RPG Modex Plate
    - Modex Type 1 provides absorption from 65 Hz - 500 Hz in a surface depth of only 4 inches;
    - Modex Broadband provides absorption between 50 - 5000 Hz in a surface depth of only 4 inches.
    - Front wall: (2) 39"x 59" RPG Modex type 1 plates (outward positions), (2) 39"x 59" RPG Modex broadband panels (inward positions). Panels with 6" spacing except at side walls, hung 23" from floor.
    • RPG BAD ARC Panel
    - Hybrid absorber/diffuser panels:
    - Side walls: (3) 2'x2' RPG BAD ARC panels @ the L/R wall first reflection points.
    • Listen Audio Diffuse
    - Hybrid diffusion system panels, bandwidth scattering sound below 600 Hz:
    (3) 2'x2' Listen Audio natural birch diffusers @ the L/R 2nd reflection points; (3) 2'x2' Listen Audio natural birch diffusers flanking the listening positions on the R sidewall and behind the listening positions on the L sidewall. All panels hung 18" from floor.
    • RPG BAD Template
    (16) RPG Absorption/Diffusion templates:
    - Ceiling: (4) 6'x6' wood frame acoustic "clouds" hung with all thread from the ceiling joists room centered. Each wood frame consists of (4) 2'x4' RPG BAD panels supported by the frame support structure. UltraTouch R19 sound absorption batts are placed on top of the structure.
    - Rear wall (center): (1) 6'x6'x12"d absorber box  filled with R38 fiberglass. (3) RPG BAD panel templates wrapped with acoustic cloth attached to the front of the absorber box. The absorber box is hung 26" from the floor.
    • ASC (Acoustic Sciences Corporation) Picture Panel
    (1) ASC Absorption/Diffusion panel mounted on the left rear wall corner.
    • Kinetics IsoMax clips
    Acoustic Frontiers "floating wall" design: The walls and ceiling of the room should be used as a component of the overall acoustic design. If properly designed they can provide invisible absorption. Sound energy excites the shell into motion. The mass of the shell and depth of the air cavity form a resonant system. The motion is damped by frictional losses in the wall material. The absorption frequency can be tuned by changing the mass of the wall, the method of attachment to the structural framing members and the depth of the air cavity. Damped drywall is useful because its resonances are subdued relative to those seen in normal drywall, which tends to vibrate at around 60Hz. As in if you energize the room with a 60Hz note the drywall will keep on ringing (making sound) after the note has stopped. A single 5/8″ layer of pre-fabricated damped drywall works great as one component of a "floating" wall system. All wall and ceiling corners are sealed with acoustic caulking.

Comments 94

Len: Wow! You are leaving nothing to chance on building the new room; I've often wondered about building out a new home from the ground up to be able to get after this level of detail in an audio room but that's not been in the cards. This past time around, we were fortunate to have found a custom built house from 7 years ago that is finished "to the nth degree" beautifully and by nice coincidence, is built better (for audio) structurally then I've seen in typical builds ever so the latest room for me sounds the best I've had thus far however, I'm sure it cannot touch an acoustically isolated purpose-built room. I wish you the best of luck in finishing the project and getting your new room up an running! Let us know when and how it sounds!

zephyr24069

Owner
The new house addition is finally weather sealed. The media room portion is beginning to take shape. This past week 1-1/2" furring strips were nailed to the (4) cbs block interior walls. Kinetics Isomax clips were screwed into the furring strips vertically on 24" centers.

Next week the hat channels will be slotted horizontally into the Isomax clip channels. After the electrical and A/C work also scheduled to begin next week is completed, damped drywall will be screwed to the hat channels taking precaution not to touch any portion of the furring strips or block walls. Acoustic caulk will be applied to 1/8" gaps where the drywall meets the floor and ceiling.

The isolated wall system will effectively provide an acoustic foundation for the room, as well providing a sound barrier.

lwhitefl

Schubert,

That's what I've been missing. I'm changing my name to Leonard immediately. :)

thesaint519

One of the finest systems I've ever seen !
Of course, everyone named Leonard has a vast advantage in innate good taste.

schubert

Owner
The Qbase is still part of my my system configuration. My equipment is likely to change very little during the next few years. I will apply a EMM XDS1v2 firmware update when it has been fully tested.

Construction of a house addition that will include a dedicated media (listening) room is scheduled to commence shortly and be completed by the end of next February. The media room acoustic design is by Acoustic Frontiers, Fairfax, CA.

The existing listening room will revert to the original family room configuration. All audio-video equipment and the theater seating in that room will be relocated to the addition dedicated media room.

The listening room overall dimensions are 19.5'L X 15.5'W X 11'H. All walls are cbs (no windows) with furring strips, insulation, isolation clips, hat channel, and damped drywall. Damped drywall on ceiling screwed to joists.

The floor is engineered wood (glued or floated) on concrete pad. A wool area rug with jute padding between listening position and speakers.

The ceiling will utilize the (4) 6' X 6' framed RPG BAD panel "clouds" now located in the existing listening room. They'll be suspended about 1' from the ceiling with integrated led room and mood lighting.

The rear wall will use the existing (3) RPG BAD panels in front of a 6'W X 6'H X 2'D frame filled with fiberglass.

If the cost is not prohibitive front and side walls will utilize tuned bass modules, diffusors, and diffusor/absorbers housed in support columns.

Front wall - (4) equally spaced 2'W X 8"D X 10.5'H vertical support columns starting in the corners. The columns in addition to diffusers, consists of (14) 2'W X 2'W tuned membrane bass modules in specific column locations ranging from 29Hz to 109Hz.

Side walls - (3 each) vertical support columns (same size as front wall) from the listening position forward. The columns in addition to diffusers and diffuser/absorbers, consists of (8) tuned membrane bass modules in specific column locations ranging from 58Hz to 116Hz.

If the cost of the columns/tuned modules is excessive, I'll likely listen to the system for sometime before deciding individual acoustic treatments for the front and side walls.

I'll be posting pictures of the addition media room interior construction starting with the "floating wall" system.

lwhitefl

Beautiful system!!

thesaint519

Are you still using the Quantum Qbase QB4 Power Distributor? If so are you happy, have you tried other AC conditioning? I am contemplating moving from Shunyata Hydra and associated power cords to the QB8 / Tyr 2 power cords . running through anything current limiting seems to be counterintuitive and I think I might like to change that?

billt1

Owner
System edited: I recently had Acoustic Frontiers perform an acoustic analysis of my current listening room. About 3 1/2 years ago I had used Rives Audio to design the acoustics for my listening room, but I had never had the results analyzed. The analysis showed the room met 16 of 21 acoustic design standards, and considering the asymmetrical room, no glaring issues. But the analysis did point out some potential improvements. The changes I've made so far is to reposition (3) floor standing RPG BAD panels to the front and right side wall speaker mirror points. And thick jude padding under the area rug between the listening position and speakers. Addressing the speaker mirror points eliminated a slight high frequency bump from the right side. But the biggest change was the left soundstage becomming considerably wider than before.

lwhitefl

Owner
System edited: New Jeff Rowland Corus preamp and 625 amp.

lwhitefl

Hi Len, Are you in Port St. Lucie, Fl?

himiguel

Owner
Hi Gary, I live 40 miles due north of West Palm Beach. Destin is a long way from here, but if you ever plan to be in this area PM me via Audiogon. Your audio system looks very nice but the pictures appear sideways:-) Regards, Len

lwhitefl

I originally asked about the Raidho tweeter upgrade when I was considering the Raidhos. I eventually purchased a pair of Consensus Passions and am thrilled with their performance. Thanks for info on the tweeters.

rkochies

FL,

I live in Destin along with another phile and would love to hook up with you and hear your system. By any chance are you in PC Beach?

Do you make it to Destin much?

Regards,
Gary

glory

Owner
Thanks Kiwi, I'm using a Nordost Brahma pc on the XDS1 and pre amp, but I may eventually upgrade all the pc's to match the Valhalla amp pc, ic's, and speaker cable.

lwhitefl

Hi Lwhitefl,

Yes, I quite agree. The new tweeters on the Raidho's really are an advance in clarity and resolution.

I am enjoying the new tweeters in my latest system. I am finding incredible air around instruments and higher level of micro and ambient detail in recordings.

You have a wonderful system. Out of interest what power cable are you using on your XDS1 source?

kiwi_1282001

Owner
The Raidho C3's resolution and dynamic range is significantly better than the Eben X3. Although the Raidho X3 is also an excellent speaker that possesses probably 75% of the C3.0 without the 3.1 tweeter upgrade.

lwhitefl

Owner
Sorry for the delay responding - I had to work with Audiogon to resolve a userid/pswd mismatch issue. I purchased the 3.1 tweeters directly from Raidho and installed them myself. I only upgraded the 3.1 tweeters as that is the most significant difference with the new speakers. The internal cables are still Nordost Valhalla which I use for all cabling.

The C3 tweeters are responsible for a considerable portion of the high midrange to treble. The change to the 3.1 tweeters is significantly improved resolution and impact in that part of the frequency range.

lwhitefl

Owner
System edited: Added front projector, 16:9 projection screen, subwoofer for movies.

lwhitefl

Len, can you compare and contrast the Raidho Eben X-3.0 to the Ayra C3.0 you now have? Thanks, Bob

rkochies

Just read your thread and noticed you upgraded the tweeter on the 3.0. and have some questions - if you don't mind.

Was the upgrade done by your local dealer? How longer did it take? Were the connectors and internal cables upgraded at the same time?

I also wondering whether you had noticed any sonic differences with the new ribbon tweeter?

Thanks

kiwi_1282001

Just read your thread and see you are in SE Fla, I will be getting the Raidho C3.1 sometime late next week to display in my studio. Lars from Raidho will be in Coral Gables helping with the setup and placement, and on August 29th from 3pm to 8pm we will be demonstrating the C3.1 & C1.1 with an array of cables from Nordost. Your are welcome to stop by if you could make it, Regards John

velo62

Just read your thread and see you are in SE Fla, I will be getting the Raidho C3.1 sometime late next week to display in my studio. Lars from Raidho will be in Coral Gables helping with the setup and placement, and on August 29th from 3pm to 8pm we will be demonstrating the C3.1 & C1.1 with an array of cables from Nordost. Your are welcome to stop by if you could make it, Regards John

audiosalonstore

Owner
System edited: Choosing a new digital source was a difficult task given the number of really great players I've heard. After listening to all the top CD/SACD/DAC contenders at RMAF 2011 (EMM, Esoteric, dCS, Playback Designs) I narrowed my decision to the Esoteric K-01 or EMM Labs XDS1. I certainly heard the XDS1 more than the K-01 because of the shear number of manufacturers using that player to display their products at RMAF (although there were a lot of dCS Puccini players being used as well). I also was able to spend several hours listening to the Esoteric K-03 in a very good audio system in Golden Colorado, and the XDS1 in perhaps the best audio system I've ever heard at The Audio Federation in Boulder Colorado after the show. Both EMM and Esoteric are great digital players with different sound and features. The K-01 is built like a tank and features a drive mechanism indisputably tops in the industry. But it has far too many "filter" options, complicating setup and operation. The EMM is built with the philosophy that simpler is better - with top notch quality (a single gain stage from DAC to output with fully discrete Class-A circuitry, proprietary power supply), and while the K-01 sounds more dynamic, the XDS1 sounds more analog and musical.

lwhitefl

Owner
System edited: Added Ultrasonic acrylic shelves w/led lighting to Solid Tech ROS equipment rack and amp.

lwhitefl

Owner
System edited: After speaking with Roy Gregory at the 2011 RMAF I've decided not to pursue the isolation transformer. RG and others I spoke with believe isolation transformers do more harm than good.

lwhitefl

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