MJ Acoustics Sub Experience

janmike
janmike Posts: 6,146
Have any of you folks ever had any experience with MJ Acoustics subwoofers. I wonder how they compare to REL. Down the road I may consider adding a sub to my 2CH should I feel the need for bass enhancement. This sub will be strictly for music AND NOT HT. Thanks for the info.
Michael ;)
In the beginning, all knowledge was new!

NORTH of 60°
Post edited by janmike on

Comments

  • danz1906
    danz1906 Posts: 5,144
    edited April 2009
    The MJA reference 200 looks pretty good for music.
    Linn AV5140 fronts
    Linn AV5120 Center
    Linn AV5140 Rears
    M&K MX-70 Sub for Music
    Odyssey Mono-Blocs
    SVS Ultra-13 Gloss Black:D
  • Midnite Mick
    Midnite Mick Posts: 1,591
    edited April 2009
    It is my understanding that certain people left Rel to form MJ Acoustics. So I imagine they would be fairly similar. However, the thing that bothers me about MJ Acoustics is that they don`t really list their specifications regarding frequency response.

    Regards,
    Mike
    Modwright SWL 9.0 SE (6Sons Audio Thunderbird PC with Oyaide 004 terminations)
    Consonance cd120T
    Consonance Cyber 800 tube monoblocks (6Sons Audio Thunderbird PC's with Oyaide 004 terminations)
    Usher CP 6311

    Phillips Pronto TS1000 Universal Remote
  • janmike
    janmike Posts: 6,146
    edited April 2009
    The REF 200 was one of the ones on my list.

    Mike, the web site seems to list some good specs, maybe not all but most. Here are the specs for the REF 200.

    Reference 200 Specifications:

    200watt MOSFET Amplifier
    Speaker and Line Level inputs with Gain Control Range 99dB
    Neutrik Speakon connector (High level 100k ohm)
    Unbalanced RCA (phono) connectors (Gold Plated) (Low level 10k ohm)
    Twin Sophisticated crossover circuits - variable increments between 20Hz and 120Hz
    LFE Bypass setting
    12 volt trigger
    Remote Control with ‘out-of-sight’ RM Eye and 4 user-presets
    Phase Control infinitely adjustable between 0º and 180º * Frequency response 13hz to 200hz
    D.I.P. (Dynamic Intelligent Protection)
    D.A.M.P. (Digitally Accurate MicroProcessor 2nd generation)
    MIDI Interface
    Specially designed cabinet structure, volume, and configuration made from inert 18 & 25mm MDF
    Digital Display with power output meter and frequency setting
    Switched fused IEC mains input socket
    250mm (10”) Ultra Long-throw Driver with Heavy Duty chassis & Double Magnets
    UK 3 year manufacturers return to base warranty
    Dimensions (WxHxD ) 300mm X 355mm X 300mm * Weight 18.85kg (43.3 lbs)
    Black Ash finish as standard with other Real Wood Veneer finishes available.

    In comparison the specs for the REL B2 (also on the list)
    B2 Specifications:
    Enclosure Type: Balanced ARM Loaded with Port
    Port Diameter: 3.95 inches
    Input Connectors: 2-Neutrik Speakon / 2-RCA Phono / 1-XLR
    Gain Control Range: 80dB
    Amplifier Type: DC Coupled MOSFET
    Input Impedance:
    - 100k Ohms, High Level, Two-Channel Unbalanced
    - 100k Ohms, High Level, Single-Channel Balanced
    - 10k Ohms, Low Level (LFE), Black 0dB, Red +12dB
    - 10k Ohms, Low Level, Single Channel Balanced
    Drive Unit: 10 inch, Long Throw Heavy-Duty Cast Frame
    Low Frequency Response: 16Hz In Room at –6dB
    Power Output: 300 Watts
    Phase: 0 and 180 degrees
    Dimensions (WHD): 13.5 x 24 x 16.5 in. 343 x 610 x 410 mm
    Weight: 83 lbs., 38 kg
    Michael ;)
    In the beginning, all knowledge was new!

    NORTH of 60°
  • ViperZ
    ViperZ Posts: 2,046
    edited April 2009
    If I were to judge just by looking at the specs that you posted, I wouldn't even look at these subs.
    Frequency response listed has no level associated with it. Is that 13 Hz at 0dB, -3dB, -6dB (most likely for that driver size and amplifier power). Even amplifier is listed as '200W' - no mention whether it's peak or RMS, also type of the amplifier is not mentioned. Very poor approach IMHO.
    (Ref: http://www.mjacoustics.co.uk/MJ_Acoustics/Product_html/Ref_200.htm)
    janmike wrote: »
    The REF 200 was one of the ones on my list.

    Mike, the web site seems to list some good specs, maybe not all but most. Here are the specs for the REF 200.

    Reference 200 Specifications:

    200watt MOSFET Amplifier
    Speaker and Line Level inputs with Gain Control Range 99dB
    Neutrik Speakon connector (High level 100k ohm)
    Unbalanced RCA (phono) connectors (Gold Plated) (Low level 10k ohm)
    Twin Sophisticated crossover circuits - variable increments between 20Hz and 120Hz
    LFE Bypass setting
    12 volt trigger
    Remote Control with ‘out-of-sight’ RM Eye and 4 user-presets
    Phase Control infinitely adjustable between 0º and 180º * Frequency response 13hz to 200hz
    D.I.P. (Dynamic Intelligent Protection)
    D.A.M.P. (Digitally Accurate MicroProcessor 2nd generation)
    MIDI Interface
    Specially designed cabinet structure, volume, and configuration made from inert 18 & 25mm MDF
    Digital Display with power output meter and frequency setting
    Switched fused IEC mains input socket
    250mm (10”) Ultra Long-throw Driver with Heavy Duty chassis & Double Magnets
    UK 3 year manufacturers return to base warranty
    Dimensions (WxHxD ) 300mm X 355mm X 300mm * Weight 18.85kg (43.3 lbs)
    Black Ash finish as standard with other Real Wood Veneer finishes available.

    In comparison the specs for the REL B2 (also on the list)
    B2 Specifications:
    Enclosure Type: Balanced ARM Loaded with Port
    Port Diameter: 3.95 inches
    Input Connectors: 2-Neutrik Speakon / 2-RCA Phono / 1-XLR
    Gain Control Range: 80dB
    Amplifier Type: DC Coupled MOSFET
    Input Impedance:
    - 100k Ohms, High Level, Two-Channel Unbalanced
    - 100k Ohms, High Level, Single-Channel Balanced
    - 10k Ohms, Low Level (LFE), Black 0dB, Red +12dB
    - 10k Ohms, Low Level, Single Channel Balanced
    Drive Unit: 10 inch, Long Throw Heavy-Duty Cast Frame
    Low Frequency Response: 16Hz In Room at –6dB
    Power Output: 300 Watts
    Phase: 0 and 180 degrees
    Dimensions (WHD): 13.5 x 24 x 16.5 in. 343 x 610 x 410 mm
    Weight: 83 lbs., 38 kg
    Panasonic PT-AE4000U projector for movies
    Carada 106" Precision Series (Classic Cinema White)
    Denon AVR-X3600H pre/pro
    Outlaw 770 7-channel amplifier
    B&W CDM1-SE fronts
    B&W CDM-CNT center
    B&W CDM1 rears on MoPADs
    JBL SP8CII in-ceiling height speakers
    Samsung DTB-H260F OTA HDTV tuner
    DUAL NHT SubTwo subwoofers
    Oppo BDP-93 Blu-Ray player
    Belkin PF60 Power Center
    Harmony 1100 RF remote with RF extender
    Sony XBR-X950G 55" 4K HDR Smart TV + PS3 in the living room
  • janmike
    janmike Posts: 6,146
    edited April 2009
    I hear you Viper. What I really want is a sub purely for music. I am not looking for the "boom" as I have that with my SVS sub for HT. Finding a sub strictly for music with seamless integration is difficult to do. I did own an old REL Strata I years ago and it was great for music but poor for HT. I think REL does this side of things pretty good and then a friend told me about MJA. Any thoughts as to different brands. Thanks.

    PS - The REL Stentor III would be my choice but a little more $ than I want to pay.
    Michael ;)
    In the beginning, all knowledge was new!

    NORTH of 60°
  • ViperZ
    ViperZ Posts: 2,046
    edited April 2009
    Mike, I'd look specifically at sealed/servo subs, if you want a musical sub. I haven't heard a high-end REL, so I can't comment on them. I have had great luck with NHT (my current SubTwo) and Velodyne (vintage ULD-15 servo) for music.
    Panasonic PT-AE4000U projector for movies
    Carada 106" Precision Series (Classic Cinema White)
    Denon AVR-X3600H pre/pro
    Outlaw 770 7-channel amplifier
    B&W CDM1-SE fronts
    B&W CDM-CNT center
    B&W CDM1 rears on MoPADs
    JBL SP8CII in-ceiling height speakers
    Samsung DTB-H260F OTA HDTV tuner
    DUAL NHT SubTwo subwoofers
    Oppo BDP-93 Blu-Ray player
    Belkin PF60 Power Center
    Harmony 1100 RF remote with RF extender
    Sony XBR-X950G 55" 4K HDR Smart TV + PS3 in the living room
  • janmike
    janmike Posts: 6,146
    edited April 2009
    Thanks Mike. I e-mailed Gary.
    Michael ;)
    In the beginning, all knowledge was new!

    NORTH of 60°
  • reeltrouble1
    reeltrouble1 Posts: 9,312
    edited April 2009
    You have nice speakers.

    When I hit the music sub corridor of the rabbit hole I quickly retreated and installed a lock on the door that can never be opened.

    I would of thought the thawing process was in full swing, however, perhaps your still suffering from frozen thought syndrome???

    RT1
  • janmike
    janmike Posts: 6,146
    edited April 2009
    You have nice speakers.

    When I hit the music sub corridor of the rabbit hole I quickly retreated and installed a lock on the door that can never be opened.

    I would of thought the thawing process was in full swing, however, perhaps your still suffering from frozen thought syndrome???

    RT1

    I am forward thinking. When it come to truly test the 2CH in its entirety, I will know if I need anything else or not. I still see snow in my driveway, but it will be gone in a couple of weeks - HOPEFULLY.
    Michael ;)
    In the beginning, all knowledge was new!

    NORTH of 60°