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  1. #1
    Phila combat zone JoeE SP9's Avatar
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    Quote Originally Posted by K-High-Fi View Post
    Hello Every body,

    Folks I may need little more help.

    I'm just wondering, is inserting 1 Ohm non-inductive degrade the sound or harm the speaker or amp in any way?

    And can I attenuate the tweeter and use a absorbents at reflection points at the same time? I was thinking if I attenuate the tweeter I don't need acoustic treatment.

    On other way, is using absorbents are much better than attenuations?

    Anyone care to answer.
    Thanks to all.
    Yes, you can do both simultaneously. The question is why. Attenuating the tweeters output does nothing other than make the speaker have less treble energy. It does not and can not do anything about problems caused by room acoustics. The only way to fix them is to fix the room.

    Fixing the room should be done before upgrading changing or replacing just about anything. It will have a greater effect for the good than almost anything else you can do.

    Fix your room. I guarantee you won't be unhappy with the results.

    You fix a problem by fixing the cause of the problem not by fixing the symptoms.
    ARC SP9 MKIII, VPI HW19, Rega RB300
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  2. #2
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    Thank you all for very helpfull informations.

    Ok how i can tell if my room need to be fixed? And what do i need?

    The choke for MG-20 in this link:
    5502-RC Bourns | Mouser

    Do i need to buy two item for pair of MG-20? And do i need other thing?

    If not mistaken, i have to remove non-inductive resister ohm that come with the speaker and instal these Chokes, correct?
    Magnepan MG20/ Krell FPB 200 watt amp/ Krell KAV-500 amp/ Krell KPS 20 IL CD player/ Krell Audio Video Standard Preamp & processor/ Project 9.1 turntable Denon 304 cart/ Arcam FMJ tuner/ Arcam 137 DVD/ Tascam 322 tape deck/ JVC vhs/ AQ interconnects: Colorado/ Transprent cable: Super, Ultra, Rference, XL Reference.

  3. #3
    Shostakovich fan Feanor's Avatar
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    Quote Originally Posted by K-High-Fi View Post
    Thank you all for very helpfull informations.

    Ok how i can tell if my room need to be fixed? And what do i need?

    The choke for MG-20 in this link:
    5502-RC Bourns | Mouser

    Do i need to buy two item for pair of MG-20? And do i need other thing?

    If not mistaken, i have to remove non-inductive resister ohm that come with the speaker and instal these Chokes, correct?
    Personally I won't offer an opinion about whether you need to do anything to your room without knowing how it's set up.

    Yes, you could replace the resister with the choke, but the
    remember that the two do different things; if you want the attenuation you get from the resistor, you will need to keep it, installed in series with the choke.

  4. #4
    Phila combat zone JoeE SP9's Avatar
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    Quote Originally Posted by K-High-Fi View Post
    Thank you all for very helpfull informations.

    Ok how i can tell if my room need to be fixed? And what do i need?

    The choke for MG-20 in this link:
    5502-RC Bourns | Mouser

    Do i need to buy two item for pair of MG-20? And do i need other thing?

    If not mistaken, i have to remove non-inductive resister ohm that come with the speaker and instal these Chokes, correct?
    IME every room can use some treatment, how much depends on many variables. You can't go wrong with a bass trap in each corner, absorbing panels at the first reflection points and a carpet on the floor. This is enough for many rooms.

    Too much absorbing will suck the life out of the music.

    I wouuld add a choke only if I was in an RF rich environment, such as, close to an antenna farm or having a ham radio operator or CB'r close by. For most situations RFI is a non-issue.
    ARC SP9 MKIII, VPI HW19, Rega RB300
    Marcof PPA1, Shure, Sumiko, Ortofon carts, Yamaha DVD-S1800
    Behringer UCA222, Emotiva XDA-2, HiFimeDIY
    Accuphase T101, Teac V-7010, Nak ZX-7. LX-5, Behringer DSP1124P
    Front: Magnepan 1.7, DBX 223SX, 2 modified Dynaco MK3's, 2, 12" DIY TL subs (Pass El-Pipe-O) 2 bridged Crown XLS-402
    Rear/HT: Emotiva UMC200, Acoustat Model 1/SPW-1, Behringer CX2310, 2 Adcom GFA-545

  5. #5
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    Thank you all very much for your help.

    I understand all.
    Magnepan MG20/ Krell FPB 200 watt amp/ Krell KAV-500 amp/ Krell KPS 20 IL CD player/ Krell Audio Video Standard Preamp & processor/ Project 9.1 turntable Denon 304 cart/ Arcam FMJ tuner/ Arcam 137 DVD/ Tascam 322 tape deck/ JVC vhs/ AQ interconnects: Colorado/ Transprent cable: Super, Ultra, Rference, XL Reference.

  6. #6
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    Please can anyone show me the link for non-inductive resistors ( in series) which can work for MG-20 and with all different values?

    I searched in Newark, Mouser and Digikey but couldn't locate the resistor for MG-20.

    Also do I need to specify wattage or any other specifications and what maximum value i can use without harming the speakers?

    I send email to Magnepan but couldn't get much help.
    Magnepan MG20/ Krell FPB 200 watt amp/ Krell KAV-500 amp/ Krell KPS 20 IL CD player/ Krell Audio Video Standard Preamp & processor/ Project 9.1 turntable Denon 304 cart/ Arcam FMJ tuner/ Arcam 137 DVD/ Tascam 322 tape deck/ JVC vhs/ AQ interconnects: Colorado/ Transprent cable: Super, Ultra, Rference, XL Reference.

  7. #7
    Shostakovich fan Feanor's Avatar
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    Quote Originally Posted by K-High-Fi View Post
    Please can anyone show me the link for non-inductive resistors ( in series) which can work for MG-20 and with all different values?

    I searched in Newark, Mouser and Digikey but couldn't locate the resistor for MG-20.

    Also do I need to specify wattage or any other specifications and what maximum value i can use without harming the speakers?

    I send email to Magnepan but couldn't get much help.
    Here's another source -- a favorite of audiophiles: Parts Connexion, (HERE).

    You'll want Mills 12 watt non-inductive resistors; order pairs of different values and see which value works best. All are listed HERE: 1 ohm (see 1R0 / MRA-12), 1.2 ohm (1R2 / MRA-12), 1.5 ohm (1R5 / MRA-12).

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