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Thread: Alesis M-EQ 230

  1. #16
    Senior Member grumpy's Avatar
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    Mostly just glad to hear it's working for you .

    It is an unusual configuration, EQ-wise, and seemed worthy of some
    discussion for those that might be interested in following suit.

  2. #17
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    Quote Originally Posted by grumpy View Post
    Mostly just glad to hear it's working for you .

    It is an unusual configuration, EQ-wise, and seemed worthy of some
    discussion for those that might be interested in following suit.
    I've been down the road w/tweeters and this 2 way A7 plays all the complex
    stuff that my old Bohemth speaks ...couldn't handle
    its all a compromise...

  3. #18
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    These Components all sounded clean
    but together they were like cats/dogs

  4. #19
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    Clipping

    http://www.alesis.com/stuff/contentm...230_manual.pdf
    I looked at the EQ manual ....at the clip indicator light function (+18db) I'm not getting that...on either EQ
    Is that a good sign...

  5. #20
    Senior Member grumpy's Avatar
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    Quote Originally Posted by Fort Knox View Post
    http://www.alesis.com/stuff/contentm...230_manual.pdf
    I looked at the EQ manual ....at the clip indicator light function (+18db) I'm not getting that...on either EQ
    Is that a good sign...
    While that's a good thing, keep in mind that most amps will clip well before reaching an 18dBV input level, unless they have (and you are using) input attenuators.

  6. #21
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    Distortion

    Quote Originally Posted by grumpy View Post
    While that's a good thing, keep in mind that most amps will clip well before reaching an 18dBV input level, unless they have (and you are using) input attenuators.
    I am very much interested in ckg distortion levels @ 10 oct
    but I don't have the equipment for it
    http://www.softpedia.com/get/Multime...enerator.shtml
    think this Tone Generator software would help??

  7. #22
    Senior Member grumpy's Avatar
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    That would give you a test signal, you would still need a way to view the output (and a test system that has more voltage headroom than what you want to see, as well as more bandwidth than 20-20KHz if you're viewing spectrum (to see harmonics), a pc based (or real) oscilloscope would be another good tool.
    A few years in an EE program wouldn't hurt either

  8. #23
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    Real Scope

    Quote Originally Posted by grumpy View Post
    That would give you a test signal, you would still need a way to view the output (and a test system that has more voltage headroom than what you want to see, as well as more bandwidth than 20-20KHz if you're viewing spectrum (to see harmonics), a pc based (or real) oscilloscope would be another good tool.
    A few years in an EE program wouldn't hurt either
    Ck out this baby..............
    It's a kit solder together runs off USB PORT
    theres 3 hyperlinks for software, assy instruction.... pics
    I ask for a total price (software download prob. xtra)
    http://www.ebay.com/itm/120694725023...84.m1423.l2649
    I got a sound card w/digital input flexijack (for pc base)
    I think I'd need a d/a converter for that though .......right?

  9. #24
    Senior Member grumpy's Avatar
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    Looks like a fun kit for learning about electronics.

  10. #25
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    Quote Originally Posted by grumpy View Post
    Looks like a fun kit for learning about electronics.
    Yah...I'd look like one of those old Geezers .......sitting in a retirerment home
    trying to put together a 10,000 pc crossword puzzle??
    maybe ...I should take up basket weaving or stuff envelopes

  11. #26
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    distortion indicators

    Quote Originally Posted by grumpy View Post
    with that much gain (25Vout/Vin), I would be surprised if the 2nd series EQ wasn't clipping fairly often
    at normal listening levels if the music program has much in the way of 15KHz energy. I don't recall if
    you've mentioned a test system (pink noise, RTA?), but it's possible to keep pushing up eq and not
    get more useful output. An oscilloscope function can help identify this sort of problem (sometimes comes
    with RTA-like programs).
    Assuming I got distortion .........I cranked down the EQ gains to -8db
    and the Signal indicator LED's..... (EQ)......started flashing
    Result was..... Hall 1,2,3,4 reverb.... became clear clear.......
    long decay ..........sounds like a sea of music...
    ....
    Overmodulated... music is easy to hear...sounds fake
    good advice Grump

  12. #27
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    Listening Test

    Quote Originally Posted by grumpy View Post
    Mostly just glad to hear it's working for you .

    It is an unusual configuration, EQ-wise, and seemed worthy of some
    discussion for those that might be interested in following suit.
    With a close eye on the Signal LED'S & Clip LED's.... (irregardless of trim positions)....sound (w/2 EQ setup)
    has improved ... dramatically.. (for the A7's) ....from the previous distortion levels..
    listening tests of local FM stations demonstrates ...the biggest single fix...

  13. #28
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    Listening Test Notes

    Quote Originally Posted by Fort Knox View Post
    With a close eye on the Signal LED'S & Clip LED's.... (irregardless of trim positions)....sound (w/2 EQ setup)
    has improved ... dramatically.. (for the A7's) ....from the previous distortion levels..
    listening tests of local FM stations demonstrates ...the biggest single fix...
    These Alesis units are quiet enough (my exper.) to run an A7 thru all 10 Octives..
    The first unit reduces the sound to 1/2 harsh
    The second reduces sound to smooth...
    ....
    All 30 freq's are metered Flat (req. lots of vol. knob)..except for
    ......
    1k to 6k ....(8 trimmers) ...freqs are bumped up 2db for the ...room..
    Otherwise all freqs are left FLAT on the meter..read
    The A7 is so efficient it can take an Eq beating w/no problem./
    the 811 makes for a big tweeter...but... there's no x-over (save for a 20uf cap)
    and the two (hf/lf) horns are pretty much indistinguishable.....at x/o
    so the overall sound effect is..,,pretty cool

  14. #29
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    Revel Rythym2 subwoofer

    Quote Originally Posted by Fort Knox View Post
    These Alesis units are quiet enough (my exper.) to run an A7 thru all 10 Octives..
    The first unit reduces the sound to 1/2 harsh
    The second reduces sound to smooth...
    ....
    All 30 freq's are metered Flat (req. lots of vol. knob)..except for
    ......
    1k to 6k ....(8 trimmers) ...freqs are bumped up 2db for the ...room..
    Otherwise all freqs are left FLAT on the meter..read
    The A7 is so efficient it can take an Eq beating w/no problem./
    the 811 makes for a big tweeter...but... there's no x-over (save for a 20uf cap)
    and the two (hf/lf) horns are pretty much indistinguishable.....at x/o
    so the overall sound effect is..,,pretty cool
    After reading about the.. "Revel Rythym subwoofer" ... and it's integral digital eq/elect x-over/amp
    I (ruffly spkg) mimicked it by adding yet ....another EQ (digital Alesis EQ) and Carver PM700 Bass am
    (that's a separate leg from the main sys)....via SUB OUT on 5 ch Gemini preamp....
    (results..Inital impression...clean).....

  15. #30
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    Digital differance

    Quote Originally Posted by Fort Knox View Post
    After reading about the.. "Revel Rythym subwoofer" ... and it's integral digital eq/elect x-over/amp
    I (ruffly spkg) mimicked it by adding yet ....another EQ (digital Alesis EQ) and Carver PM700 Bass am
    (that's a separate leg from the main sys)....via SUB OUT on 5 ch Gemini preamp....
    (results..Inital impression...clean).....
    After more listening..........
    My old sub (from the 80's) never sounded so good
    nor did I think it ever could ..but a simple add. of an (in-line) digital EQ
    made a fun differance..the sound is new
    Try it out ..if you haven't already

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