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  1. #1
    Junior Member
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    Upgrade VMPS Large?

    I have a pair of older VPMS Large subs and love them - especially the 17hz low end. The rest of my speakers are all professional JBL's - a 12" mid base, 8" midrange and concert horn tweeters. Each speaker has it's own power amp. Im thinking about replacing the 2 active VMPS drivers (not the passive driver) with JBL professional 12 and 15 inch drivers. My other option is to go with dual JBL 18" drivers per side but the response only goes down to 25hz. Thoughts or advice? Thanks, TJ

  2. #2
    Senior Member
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    May 2017
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    Cleveland, Ohio, USA
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    530

    Re: Upgrade VMPS Large?

    I doubt that the JBL drivers are optimized for a VPMS enclosure.
    Have you visited the VPMS forum?
    VMPS Speakers

  3. #3
    Junior Member
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    Re: Upgrade VMPS Large?

    Not yet. I'm a brand new member

  4. #4
    Junior Member
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    Re: Upgrade VMPS Large?

    That link does not allow questions

  5. #5
    Senior Member
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    Cleveland, Ohio, USA
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    Re: Upgrade VMPS Large?

    After you make a required number of posts in other threads it will.

  6. #6
    Junior Member
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    Re: Upgrade VMPS Large?

    I finally got my beloved VMPS Large subwoofers out of storage and hooked up and found that the passive 15 inch bottom firing passive had rotted out. Needlessly to say the frequency response does not even get close to the 17hz earth shaking it used to. Maybe down to 30. These speakers are probably 30 years old and deterioration is expected. The active drivers work fine. A quick search on google determined that the term "passive subwoofer" means something totally different than what I need to replace. Passive sub speakers have no coil but that's not what I'm seeing. Is there a 15" speaker with no voice coil out there or do I need to totally revamp the subwoofers?

    Oh and BTW there is no VMPS brand specific thread.

    Thanks for your help and what a great forum!
    Rack 1
    Preamp - SAE 2100L freshly restored
    Sources - SAE T101 Tuner, SAE D102 CD Player, ipod, Android Phone, Audio Oscillator, Sansui AX-7 Mixer, TV Audio
    Processors - SAE 1800 Parametric Equalizer, ADC SS-325X Spectrum Analyzer/Display, dbx 231 Graphic Equalizer, dbx 1BX-DS
    Compressor/Expander, dbx 120X-DS Subharmonic Synthesizer
    Rack 2
    2 dbx 234 Active Crossovers
    2 Onkyo M5030 Power Amps
    2 Onkyo M504 Power Amps
    Pyle PFN41 Ducted Forced Air Cooling
    Speakers
    Tweeters - JBL 2385A Horns with 2450H Drivers, JBL 2370A Horns with 2425H Drivers
    Midrange - JBL 2118H
    Midbass - JBL 2206HPL
    Subwoofers VMPS Large
    Honorable Mention
    Pyle PS1000 Power conditioners on each rack
    Heathkit AD1013 Audio Oscilloscope
    Custom length Belden 1505 cables with Canare RCA and 1/4" TRS connectors throughout
    306 Knobs, Switches, Buttons, and Sliders

  7. #7
    Senior Member
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    May 2013
    Location
    Tallahassee, Florida/Greenville, SC
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    3,242

    Re: Upgrade VMPS Large?

    If you will go to Audio Circle and contact John Casler you will likely get the information you need. John was Brian's largest dealer as well as very close friend and helped Mrs. Cheney with closing down the company and liquidating inventory after Brian passed. Send him a PM and get a phone number to call him. There are a large number of people on AC that have a lot of experience with VMPS speakers. Danny Ritchie at GR Research may also be able to help you source the parts you need.

    Also VMPS owner forum.

    VMPS Speakers
    Main - JVC QL-Y7/Denon DL-301 Mk II, Gold Note PH-10, Jays CDT3 Mk3 , Auralic Aries G2.2, Holo May KTE, Supratek Cabernet, Kinki Studio EX-B7 monoblocks, Verity Audio Otello, (2) Rythmik F12SE, Audio Envy IC, SC & PC's, Triode Wire Lab PC's, Inakustik USB and I2S, (2) Puritan Audio Labs PSM-156 with Groundmaster City, Timbernation rack

    Family Room - Oppo UDP-203, Auralic Aries, Aqua La Voce S3, Kinki Studio EX-M1+, Nola KO, (2) Rythmik F-12G, Wireworld SC & IC's, Neotech PC's, SurgeX SA-1810

    Greenville, SC- Jays CDT2 Mk 3, Auralic Aries G1, Holo Spring 3 KTE, Supratek Chardonnay, Odyssey Audio Kismet Reference, Rosso Fiorentino Volterra 2, (2) RSL Speedwoofers, iFi Audio Power Station, Wireworld IC's, Inakustik USB and I2s, Triode Wire Lab SC, Triode Wire Lab PC's, Furutech NCF Clear Line, Timbernation rack.

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Upgrade VMPS Large?

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