Poseidon's Voice's Shrine, a Two-channel Audio System by poseidonsvoice

26272255-75D 6-4C 88-954E-DB 52B 640168E
Room Size
15.5 feet wide, 23.5 feet deep and 10.5 feet tall
System Overview
Dual 2 channel & 7 channel high sensitivity system with multiple subs per Earl Geddes. Most of the system is completely DIY.
Music Preferences
Room Description
The room construction involves 2 external solid core doors with rubber seals, and integrated door sweeps. Between the 1st door and 2nd door, there are full range GIK 244's for additional isolation. Next, there is a double drywall w/Green Glue and over 200 RSIC-1 clips and multiple furring hat channels. 2 rows of studs were implemented on the front, rear, left and right walls along with additional isolation techniques for the ceiling. There is a 1 inch gap between the rows of studs so that the adjoining room does not engage in sympathetic vibration when the walls of the listening room vibrate! QuietGround Rubber underlayment for the floor. Separate equipment room with very similar construction. All outlets, whether power or speaker have their own MDF enclosures. Ceiling lights have their own soffit. In addition, extensive attention was placed on HVAC design, use of mufflers, etc...
Acoustic Treatment
Carpeted. GIK Acoustics, Listen-Audio, Arqen & Custom DIY; 4 GIK 242 panels on the front wall with 5 Stepfractal diffusers in a stepped aperiodic array. Pair of GIK Tritraps in each front corner; 2 GIK Soffit traps on floor/side wall junction to treat SBIR. 4 GIK 4A Alpha Woods in blonde veneer on each side wall in front of the sidewall 1st reflection treatments. Each sidewall 1st reflection point has 2 Aperture Diffraction Grating wide bandwidth hybrid diffusers; 10 GIK Grid fusors and 1 GIK 242 panel on the ceiling; 5 Stepfractal diffusers in an aperiodic array on each of the rear side walls; 2 GIK QRD's on left upper rear corner, with 3 GIK Monster Trap FRT w/Limiter; 1 GIK QRD each on the bathroom door and front door covering the upper right rear corner, and 2 GIK 244's FRT w/Limiter on lower right rear corner; 4 Stepfractal diffusers in an aperiodic array on the mid to high rear wall combined with a 4 inch OC703 fiberglass w/FSK with air gap; 1 GIK Monster Trap on mid rear wall and 1 GIK Monster Trap FRT w/Limiter on low rear wall/floor junction; Soffit on *entire* ceiling perimeter doubles as an absorber by having a combination of OC703/FSK w/ fluffed fiberglass similar to GIK Soffit trap. If you want to see individual measurements of the diffusers, wide bandwidth and narrow bandwidth absorbers, they are all available at GIK's, Arqen's and Listen-Audio's websites. Some are predictions using AFMG Reflex software as it is very difficult to measure diffusers accurately. The absorbers on the other hand are measured at Riverbank Acoustical Laboratories.
Listening Impressions
A "You are There" or a "They are Here" experience depending on recording techniques.
Media Storage
Main music on 1TB SSD on SonicTransporter.
Other Comments
Speakers are 10 feet apart and toed in such that central seat is 20 degrees off axis to the main speakers. Speakers are about 4-5 feet from the front wall/corners. Listening position is roughly 10-12 feet back. Back wall is at least 10 feet behind me. One Tsunami I sub is on the left side wall near midpoint of room. The other is at midpoint on the right side of the room. The Tsunami II is at the rear right side of the room. The Funk 21.0LX sub is on the rear left side wall/corner. Entire low end response from 20-300Hz was optimized using a calibrated MiniDSP-UMIK-1, and software. It is better than +/- 3 dB *without* smoothing from 17-300Hz and +/- 2dB with 1/12th octave smoothing. DSP only used on the Funk 21.0LX ULF sub to extend ultra low bass. In addition, there is a center channel Abbey as well as 4 GedLee Harpers for the surround speakers, also with upgraded parts and wiring.
Digital Source
sonicTransporter i5 (Roon Core); BJC CAT6. iPad Air and iRule as remote.
Analog Source
After several years of playing vinyl I have left it to others to continue that pursuit!
Signal Processors
Signal flow: sonicTransporter i5 (Roon) w/Auralic Aries G2 w/Matrix X-Sabre Pro (MQA)
Poseidon's Voice Lazarus (Balanced Bent Audio TAP-X w/silver AVC's)
Power Amp
Poseidon's Voice Modulus-286 or Poseidon’s Voice NPXP (Nelson Pass Xperimenter's Platform) or DIYAUDIO Sony VFET amongst others...
GedLee NA12 modified w/NoRez interior cabinet, ext passive crossover w/upgraded parts in piano black on custom 19 inch wooden stands finished in cognac coupled with an Isoacoustics modular stand system.
(2) Poseidon's Voice Tsunami I, (1) Poseidon's Voice Tsunami II, and (1) Funk Audio 21.0LX. The Tsunami I is a midbass module, the Tsunami II is a midbass-bass module and the Funk is a super sub, easily encompassing all low frequencies one desires.
Speaker Cable
Harmonic Technology Pro 13 Reference with Furutech FP201R spades for mains. DH Labs Prelude (11AWG) with Furutech FP203R spades for subs.
Zenwave D3 SE XLR (dac to pre) & Zenwave D3 XLR (pre to amp). DH Labs Pro Studio XLR (subXO & sub amp for all subs). Neotech 3004 XLR for Funk & Tsunami II subs.
Power Cables
TWL 7+ on amps & Uberbuss. TWL Digital American on Aries G2. TWL Obsession NCF on DAC. DIY DH Labs Red Wave w/IeGO connectors or P.I. Audio Mongo on DCX2496, and all sub amps.
Sorry, but nope.
Custom walnut/birch racks. All components are isolated with various Herbie footers, DiD isolators, except as otherwise specified.
Power Cond
Furutech GTX-R & GTX-G, Maestro & P.I. Audio Uber Puerto outlets. UberBuss w/TWL 7+. Dedicated 12 gauge Romex line to equipment room. Everything except main amps are plugged into the UberBuss. Main amps are directly to the wall w/P.I. Audio Uber Puerto.
Tuning and Tweaks
Are you kidding? The whole thing is a tweak, with the exception of the speakers & room!
Other Components
Poseidon's Voice Parallel 86 for Tsunami I subs. 2.4kilowatt integrated plate amp w/DSP for the Funk Audio 21.0LX. Hypex PSC2.400 for Tsunami II. AMB Kappa DCX/2496 to optimize all 4 subs. All loudspeakers are decoupled with custom Isoacoustics stands.