System Overview
PS Audio Power Plant Premier Line Conditioner 

NUC Rock running Roon 

PS Audio Directstream DAC via Singxer SU-6's I2S output, 

Balanced Audio Technology 3xi Preamp to Marchand Electronics XM44-4 Active Crossover 

Simaudio Moon Evolution W-7 Amp feeding VMPS RM-V60 mid and treble section

VMPS RM-V60 speakers modified by moving three bass drivers located in pedestal to separate cabinets. 

Balanced Audio Technology VK-220 Amp feeding VMPS RM-V60 bass section 

Dayton Audio SA1000 amps (pair) feeding pair of VMPS Larger Subwoofers

Interconnects Harmonic Tech Silway II and Kimber KCAG

Speaker cables Acoustic Zen Satori Shotgun modified to have one run for bass and other for mids/treble, Canare 4S11 for subwoofers.

Music Preferences
Listening interests: Alternative/Indi Rock, Pop/Rock, Neo-psychedelia, Electronic, R&B, Bluegrass, with a smattering of Classical and Jazz.

Room Description and Treatment

Room: 16.5’ wide X 26’ long X 8’ ceiling, carpeted.
Acoustic Treatment

Room treatment is GIK acoustics and home made panels using mineral wool and Guilford of Main covering.

Tuning and Tweaks
Went with active crossover, so drivers are driven directly from amplifiers. Used digital XO and REW to determine XO points and slopes. Then replaced digital XO with Marchand analog XO. 

Was not satisfied with mid bass pedestals (drivers too close to floor), so moved drivers into seperate enclosure.

Electra Cable Tube Connectors for speaker inputs.  

All speakers have properly loaded sorbothane with 15 to 20% deflection; Gaia III for bass speakers, carpet over cement floor.

Room Details

Dimensions: 28’ × 17’  Large
Ceiling: 8’

Components Toggle details

    Comments 8

    Showing all comments by georgeab.

    View all comments

    Thank you. The original design is the speakers are 3 db down at 70 Hz, so they were designed to require subwoofers. So essentially 6' tall mini monitors. The bass in the pedestals XO was set up work in the limited range of 70 Hz to 270 Hz. That large cabinet also only functions in that range as that is what I have the active XO set up for. The XO rolls off at 24dB/octave at 70Hz so although it could go lower it is unable to.   

    What I found with the original design was the low bass having the drivers 5.5" off the floor the soundstage seemed like it was compresssed in the vertical. With the ribbons being used from 270Hz up and the detail, speed, and harmonics ribbons provide, rather than living with the design limitation of a compressed vertical soundstage (not bad, but noticeable to me), I decided to experiment with taking the existing drivers and putting into another enclosure. Some folks have lifted up the entire speaker on pedestals. If it didn't work out, I could always go back. It was immediate that I was on to something so I modifiied the enclosures. Really pleased with the result. This is a discussion I put on the VMPS Audio Circle site concerning the project.