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) designed the room acoustics and provided optimum inside wall dimensions. The finished room dimensions are 19'-6"L x 15'-3"W x 11'H.

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. 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, soundstaging, 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.

D3 Measurements:
58" tweeter<->front wall (54" RPG Modex Panel);
114" center<->center;
34" side wall<->center;
3.5" toe-in;
123" tweeter<->listeners ear;
70" rear wall<->listeners ear (58" wall absorber behind center chair<->listeners ear).

A Solidtech ROS Ref 4 with Ultrasonic acrylic shelving is positioned left of the listening position containing:

- EMM Labs XDS1 v2 MDAT2 supported by Ansuz Darkz DTC, powered from the Ansuz Mains8 D-TC with Ansuz A2 15A 2M PC;
- JRDG Corus supported by Nordost Ti Pulsar Points, powered from a JRDG external AC->DC power supply supported by Ansuz Darkz RC, powered by a Nordost Valhalla 2M PC;
- JL Audio CR-1 Crossover supported by Ansuz Darkz RC, powered by a Nordost Brahma 2M PC redirects the stereo output below 80Hz from the JRDG Corus XLR output from the Raidho D3s to the JL Audio F212v2. The CR-1 also uses LFE output from the Integra DTC-9.8 for videos. This has eliminated transient intermodulation distortion in the JRDG 625 or Raidho D3, and the JRDG 625 now has more current reserve to produce the mids-highs, as well as the D3s now reproducing cleaner and more dynamic mids-highs;
- Ansuz Mains8 D-TC supported by Ansuz Darkz DTC, powered from a dedicated 20A Furutech GTX-D duplex receptacle with a Ansuz A2 15A 2M PC, supplies power for all stereo ancillary equipment.

A JRDG 625 S2 amp centered on the floor drives the Nordost D3s using Nordost Valhalla-2 4M speaker cables. It's supported by an Ultrasonic acrylic shelf sitting on Nordost Ti pulsar points, powered from a dedicated Furutech GTX-D duplex 20A duplex receptacle with a  Nordost Valhalla-2 20A 2M PC.

A JL Audio F212v2 subwoofer supported by Ansuz Darkz D resonance controls and powered by an Nordost Brahma 15A 2M PC is positioned 13" to the inside of the left Raidho D3. The F212v2 has been volume matched and phase degrees aligned with the 80Hz crossover, DARO was 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.

A SolidTech Radius Solo 3 rack is positioned to the rear left side wall of the listening position supporting AV equipment:

- Integra DTC-9.8 Pre/Pro powered with a Nordost Brahma 2M PC supplies Dolby/DTS stereo to the JRDG Corus, and LFE to the JL Audio CR-1 for movies;
- Pioneer BDP-62FD Blu-ray player supplies video to a JVC DLA-RS66U via WireWorld 12M Ultraviolet HDMI, and sound to the Integra pre/pro);
-200X3 Amplifier drives the rear surrounds;
- SurgeX XU115 UPS provides battery backup and powers JVC projector via Panamax MIWPOWERKIT Pro and Pioneer blu-ray player.

A JVC DLA-RS66U front projector hangs 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) to ensure 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 set in the perimeter of the ceiling "clouds" provide general purpose room lighting. Blue led strip lights around inside perimeter of the ceiling "clouds" provide mood lighting.


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
    • EMM Labs XDS1v2 SACD/CD Player and DAC
    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.
    • JRDG Corus Preamplifier
    Receives power from the JRDG AC/DC Power Converter.

    Inputs: Four balanced, two unbalanced, programmable gain offset on all inputs Outputs: Four main, two record (one of which has independent gain adjustment) Gain: 7dB (+/-20dB gain programmable on each input) Gain resolution: 0.5dB over entire 99.5dB range Input impedance: 40k ohms (balanced or unbalanced) Output impedance: 60 ohms (balanced or unbalanced) Power consumption: 15W Dimensions: 15.5" x 3.9" x 12.3" (linestage chassis); 4.7" x 2.9" x 11" (power supply) Weight: 22 lbs. (linestage); 6 lbs. (power supply)
    • Ansuz Acoustics Mains8 D-TC
    Provides power conditioning and distribution.
    • Ansuz Acoustics Darkz DTC
    (6) Resonance control:
    - (3) EMM Labs XDS1v2
    - (3) Ansuz Mains8 D-TC
    • Ansuz Acoustics Darkz Diamond
    (5) Darkz D used for resonance control supporting:
    - (3) JL Audio CR-1
    - (2) JRDG AC/DC converter
    • Nordost Ti Pulsar Points
    (12) Resonance control:
    - (3) JRDG Corus;
    - (3) JRDG 625 S2;
    - (3) Integra DTC 9.8 Pre/Pro;
    - (3) Pioneer BDP-62FD Blu-ray Player
    • SolidTech ROS Ref 4 Equipment Rack
    Used with Ultrasonic acrylic led shelves for additional stability, resonance control, and esthetics, to support:
    - EMM Labs XDS1;
    - JRDG Corus;
    - JL Audio CR-1;
    - Ansuz Mains8 D-TC
    • JRDG 625 S2 Stereo Amplifier
    Built upon a Rogers ceramic circuit board laminate material for lower dielectric absorption and energy storage. The 4-Pole filter capacitors used in the 725 power supply have also been included in the S2, significantly reducing power supply output noise.

    Input circuitry includes an additional linear phase 2 pole filter to effectively attenuate all out-of-band signals from any source, including DSD spurious noise.Cardas gold/teflon/rhodium XLR input connectors are carried over from the 725. Newly developed error-correction circuitry has been incorporated around the entire amplifier, making a total of three independent error-correction techniques used to decrease all forms of distortion throughout the entire audio bandwidth.

    Output Power 325 watts @ 8 ohms / 600 watts @ 4 ohms
    Frequency Response 10 Hz – 150 kHz, -3 dB
    S/N Ratio 95 dB, ref. 1.0 watt @ 8 ohm load
    Amplifier Weight 54 lbs. / 24.5 kg
    Amplifier Shipping Weight 64 lbs. / 29 kg
    Amplifier Dimensions (h/w/d) 5.75” x 15.5” x 16.25”
    • 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 <81 Hz from the JRDG Corus XLR output are redirected from the Raidho D3s to the JL Audio F212v2. The CR-1 also uses the Integra DTC-9.8 LFE output for videos in bypass mode.

    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.
    • 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 179 degrees
    • Toshiba Portege R825-P70
    Windows 10 based laptop optimized as music server using JRiver MC19. Connected to EMM Labs XDS1v2 via 1M Kimber Kable AG USB
    • Ansuz Acoustics C2 1.5M XLR IC
    Connects EMM Labs XDS1v2->JRDG Corus
    • Nordost Valhalla 1M XLR IC
    Connects JRDG Corus->JL Audio CR-1
    • Nordost Valhalla 5M XLR IC
    JL Audio CR-1->Jeff Rowland 625 s2
    • Kimber Kable AG USB B Bus
    Connects Toshiba laptop music server->EMM Labs XDS1
    • Nordost Valhalla-2 4M Speaker Cable/spades
    Jeff Rowland 625 s2->Raidho D3s
    • Nordost Valhalla-2 2M 20A PC
    Supplies power from dedicated Furutech/GTX-D NCF(R) 20A duplex receptacle
    ->JRDG 625 S2
    • Ansuz Acoustics A2 2M PC
    (2) Ansuz A2 Power cords:
    Furutech 20A duplex receptacle->Ansuz Mains8 D-TC;
    Ansuz Mains8 D-TC->EMM Labs XDS1v2
    • Nordost Valhalla 2M 15A PC
    Ansuz Mains8 D-TC->JRDG Corus A/C Converter
    • Nordost Brahma 2M PC
    (2) Nordost Brahma 2M
    - Ansuz Mains8 D-TC->JL Audio CR-1;
    - 20A wall receptacle->JL Audio F212v2
    • Monster Power 3M IC
    Connects Integra DTC9.8 pre/pro LFE output->JL Audio CR-1 for movies.
    • DH Labs Sub-Sonic II
    Connects JL Audio CR-1->JL Audio F212v2
    • 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
    - Integra DTC-9.8;
    - Pioneer BDP-62FD;
    - Acurus A200 X3.
    • JVC DLA-RS66U 4K Front Projector
    Receives AC (battery backup) from the SurgeX XR115.

    4K D-ILA Projector; e-shift2 technology; 3D enabled (THX certified); 130,000:1 contrast ratio; ceiling hung
    • DA-LITE 16:9 Tensioned Screen JKP Affiinity
    67.5 X 120" Viewing Area
    • Integra DTC-9.8 AV Processor
    Used for weekend movies
    • Pioneer BDP-62FD Blu-ray Player
    Universal disc player used for weekend movies.
    • Acurus A-200 x3 Amplifier
    Used to drive B&W CCM80 rear surround speakers.
    • SurgeX XR115
    Power conditioner/battery backup for:
    - JVC DLA R-66 projector:

    Power conditioner for:
    - Integra 9.8 DTC Pre/Pro (battery backup)
    - Pioneer BDP-62FD Blu-ray Player (battery backup)
    - Acurus A200 x3 Amplifier
    • 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 92

After I decided to install a subwoofer and active crossover, I needed additional cabling. I considered more Nordost Valhalla because I've read from informed sources it's best to stay with a single manufacturer. But I've been a fan of Michael Borresen since 2011 when I first heard the Raidho line of speakers at RMAF. Borresen has a degree in physics, was a designer at Nordost and other Scandinavian audio companies, and was the designer of Raidho. Borresen and Lars Kristensen started Ansuz Acoustics a few years ago. Borresen designed Ansuz PC's and power conditioners/distributors using both physics principles and critical listening. Based on Borresen's experience with Nordost I believed the Ansuz cables would have a similar sound, and I was right.

I purchased two Ansuz PC's: one to run from the Furutech duplex wall receptacle to an Ansuz Mains8 D-TC, and the other from the Mains8 to the EMM Labs XDS1v2 together with a Ansuz C2 XLR IC to connect the XDS1 to the JRDG Corus. I also used Ansuz Darkz DTC resonance controls under the XDS1 and Mains8. That allowed me to free up a set of Nordost Ti Pulsar Points under the JL Audio CR-1 (once again reinforcing the benefit of resonance control).

I've also spent quite a lot of time precisely integrating the subwoofer phase around the 80 hz frequency so that the sub and Raidho D3s sound as one. The power and sub changes improved the dynamics and resolution of the music playback where I can now hear very subtle parts of the music reproduction such as the reverberation of strings and drum kits, sound wave from cymbals, and the air from brass instruments. The improved dynamics have also added a more lifelike character to both instruments and vocalists.

I resisted inserting a subwoofer and crossover into my system for years believing the main speakers could perform that function well - they simply can't except for perhaps a few at the very top end. And while I knew good power was very important (it's what we hear), it turns out I should have prioritized improvements to A/C over other cabling much more. It's taken me a very long time to get to this point, but with well recorded material I can really hear deeply into the music now with a commensurate emotional improvement. Music is so important!


I've owned a number of very good speakers in my life, but only one actually produced bass that got my attention. That was back in the 1980's with the Infinity Beta system that had separate bass and  separate mid-high frequency towers. That is until I recently installed a JL Audio F212v2 and CR1 Active Crossover in my system.

The bass is now not only prodigious, but after adjusting for phase alignment has a timbre complimenting the main speakers. The Raidho D3 imaging has been spectacular from the beginning, but now the mids and highs have an airiness and definition that makes the instruments and voices sound like they're suspended in air.

JL Audio customer service has been phenomenally patient and knowledgeable helping me integrate the subwoofer with the main speakers. It's been too long ago to remember any real detail of the Infinity Beta, just a general impression of awesomeness. But I think the setup I have now has a full range impressiveness not unlike what I remember with the Beta's.

When the room was being designed I was told there are few speakers at any price point that wouldn't benefit from a well integrated subwoofer with a crossover. I'm now a believer.


Awesome room and set up. Still in Hobe Sound? Reached out to you a long time ago, I live in Port St. Lucie. Would love to hear your set up someday.


I've ordered a JL Audio CR-1 Analog crossover. It will reroute frequencies <90hz from my Raidho C3 to my JL Audio F212v2 sub. I expect it will take some time to get it right, but this change will improve the quality of the sound emensly. Read my update of the system description describing the equipment. I'll repost when the integration is complete. Exciting🙃


Last week I added a JL Audio Fathom F212v2 subwoofer to replace my Definitive Technology SC8000. The F212v2 is positioned near the left rear corner based on my Acoustic Frontiers (Nyal Mellor) room design. I used the D.A.R.O technology that uses a powerful on-board DSP to automatically optimize the subwoofer's in-room frequency response. During the next several days I tweaked the LP @ 60Hz with a 24 dB/octave slope and -3dB ELF trim. With these adjustments the sub integrates well with the stereo speakers. The F212v2 has strikinly improved the timbre and authority of bass over the SC8000. Standing bass, drum kits, and even a Fender Rhodes actually have definition in the lower registers. I'm going to listen to this configuration for a few months, but I'm still planning on adding a JL Audio CR1 crossover "dialed in" by Nyal. I'm convinced the bass in all but a very few main speakers is inconsequential compared to the mid and high frequencies. Let the main speakers handle those frequencies coupled with a great subwoofer for the low frequencies. In all but a very few cases this configuration will create better sound and considerably more enjoyment than spending a fortune trying to get good bass out of stereo speakers. I could have used D2's or possibly D1's rather than D3's to get the incredible resolution, articulation, and 3-dimensional imaging.


Awesome room and system - i saw you had a Lindemann 855 for sale a ways back? Couple questions - do you still own it? Is it a good amp? I have a Pass Labs X350.5 amp that I love but its so big and my room isn't dedicated so want to a get a smaller amp but just as good amp or maybe better. Plus i have a chance to get the matching preamp so was wondering if you share a little about the amp. Thanks

Ag insider logo xs@2xfsmithjack

My understanding has been an external crossover is required to control both the sub and main speakers to properly integrate low/mid level frequencies. Thus I had been considering buying a JL Audio CR1 crossover and possibly a matching e-sub.

Instead I decided to try using one channel from my JRDG Corus to the line level input of my Definitive Technology SC8000 sub setting the crossover point 40 Hz. I had previously only used the sub which is located in the rear of my room for movies surround sound.

Since I'm using only the subs internal crossover, full bass is still being sent to the front speakers. I expected to hear bass overhang, but to my surprise there's very little to my ear. The low/mid frequency integration may be better with an external crossover, but this change has made a significant difference with my stereo listening. Not only am I now hearing tight low level bass with punch, but the soundstage sounds even bigger.

I'm now planning on buying a pair of reasonably priced DH Labs subwoofer cables to feed both line level sub channels from the Corus. Although both Stereo channels are mono and contain the same frequency output, I understand using both channels provides more gain.


I agree the power cords make a significant difference. I'm using a V2 2M pc to my amp and a V1 to my Qbase 4. I'll have to look into the Nordost trade-up program since I would like to change all my pc's to V2. Thanks Ron.

I can attest building a dedicated room with good acoustics made a world of difference. When my audio system was in the FR any type of upgrade was more subtle and less satisfying.


Love your system and room. I recently upgraded my Tyr 2 speaker cables to V 2  (4 meters) and heard a big improvement. I then decided to purchase an Odin (V1) power cord to power my Qbase 4. That was a bigger improvement in sound quality. I got the Odin through the Nordost trade up program at fraction of retail. The Odin changed the overall tonal balance of my system from lean to a 3D richness I never thought possible. I am now working on my room. I think you did it right (putting so much effort into room and acoustics). Congratulation on a job well done!


It's been 2+ weeks since I upgraded to the Valhalla V2 speaker cables. This change produced obviously better articulation, and instrument specificity in terms of timbre and soundstage placement. I can't actually say this was a cost effective improvement given the cost of the Valhalla V2, but there's no question it has raised my listening enjoyment.


I just received Nordost Valhalla V2 4M speaker cables to replace my Nordost Valhalla 2M speaker cables. I'll start listening today and post my thoughts after the cables are fully broken in.


I love your system. I have the JR 625 S2 and swear it's the best/last amp I'll own!


I had JRDG upgrade my 625 amplifier to the S2 level. I received the unit yesterday and listened for about 5 hours last night. The 625 was really good before, but the S2 version is even more analog sounding and organic - more presence and impact.


Great system! If not a secret, what power setting the lamp in the projector you are using?


Installed Furutech bundle: GTX-D NCF(R) duplex receptacle, GTX Wallframe, and GTX Carbon Fiber Outlet Cover. This receptacle serves all ancillary equipment on the two SolidTech racks at the left rear wall.


Upgraded the Raidho C3 with the D3. The resolution and dynamics are at least twice that of the C3. Will update with pictures once Audiogon virtual systems app allows.


beta testing new virtual systems


I've created a separate virtual system page for the room acoustics, and posted current pictures showing the interior room acoustic panels. See "Len's Media Room Acoustics".

I'll edit my other virtual system to remove the acoustic descriptive bits and change the pictures to audio video equipment. I'm currently unable to use the Audiogon edit function for my virtual system pages.


The RPG modex type 1 (outside positions) and modex broadband (inside positions) have arrived. They've been temporarily placed on the front wall floor roughly at the horizontal positions they will occupy when hung on the wall 23" above the floor.

The RPG BAD ARC panels have arrived. They've been temporarily placed on the side wall floors at the first reflection points. They will be hung in the same vertical alignment as the Listen Audio birch diffusor panels.

The installer will hang all panels on the wall this coming week.

Acoustic Frontiers (Nyal) told me I'm only hearing about 70% of the improvement with the panels on the floor. I can clearly hear the room's reverberation time has been significantly lowered, voice and instrument articulation and soundstage definition has improved, the low end is tighter and more pronounced.

Unfortunately I can't post pictures on my virtual system page. The Audiogon staff is telling me they're working on a problem with that portion of the website.

I have posted the pictures here:


The RPG modex plates for the front wall and RPG BAD ARC panels for the side wall first reflection points have finally shipped. They're scheduled to arrive next week and will be installed the following week completing the foundation and internal acoustic design for the media room.

I'll post some new pictures after the installation. And I'll post my listening impressions a few days later.


Wow, fantastic room and components. The room makes such a huge difference in evaluating changes in a system as you know.


System edited: The rear wall absorber box (48"Hx60"Wx12"D) was installed today. The inside is filled with (3) R38 fiberglass open faced batts, and the front panels consist of (3) RPG BAD templates wrapped in acoustic cloth.


System edited: Removed RPG BAD panel/frames from front wall. The RPG BAD templates are being installed as the front of the rear wall absorber box scheduled for install 7/31/15. The RPG Modex plates and BAD ARC panels are scheduled to be shipped the week of 8/3/15.


System edited: The Listen Audio diffusers were installed today on the left and right side walls. The exact positions were specified by Acoustic Frontiers. The RPG modex plates and BAD ARC panels should arrive and be installed sometime during the first half of August. The local company that installed the diffusers today is building the rear wall absorber box. One of the three RPG BAD templates currently used in the floor standing frames was disassembled today. The installer took that one RPG BAD template with them for sizing since all three templates will form the front of the absorber box.


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