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Questions about rigging up an old Sunn cab with GK 700rb-II

Discussion in 'Amps and Cabs [BG]' started by mattamatician, Apr 18, 2012.

  1. Apr 18, 2012 #1
    mattamatician

    mattamatician

    Apr 18, 2012
    Hello,

    I recently bought a GK 700RB-II amplifier. I went to ebay to get a cab and I was lucky enough to win a GK 410Neo 8 ohm cabinet. The guy that I bought it from was literally the coolest dude on the planet. He actually gave me an old Sunn 1 x 15 and covers for both cabinets!! He was selling an old tube Sunn head via ebay and the buyer didn't want to pay for shipping the cabinet, anyway, I truly scored. Now I need to figure out the best way to hook them both up. I have a NL4FC SpeakOn cable, that connects the Head to the 410Neo and I used a 1/4 to 1/4 jack to connect to the Sunn Cab. I tested them each individually and together albeit at low volume, and everything sounded ok. Because of this I am pretty sure that the Sunn Cab is 8 Ohm.

    I just bought a SpeakOn to 1/4 cable, and I want to use it to connect the Amp to the Sunn Cab. The cable is a Hosa SKT-410Q.

    My question is: if you were me how would you hook up these cabinets? Do you think there will be a problem if I Bi-amp to the 410 and use the Hosa SpeakOn cable to the Sunn Cab?

    Any feedback is greatly appreciated!!
     
  2. Apr 18, 2012 #2
    B-string

    B-string

    Nov 21, 2008
    Lake Havasu City, Az USA
    No problem as the G-K speakon is a 4 conductor (two separate wires for the horn) and the Hosa is 2 conductor only. :)
     
  3. Apr 18, 2012 #3
    mattamatician

    mattamatician

    Apr 18, 2012
  4. Apr 18, 2012 #4
    mattamatician

    mattamatician

    Apr 18, 2012
    Oh I'm sorry I just re-read your post. You know that the Hosa is 2 pole and you were telling me. Thanks!
     
  5. Apr 18, 2012 #5
    wcriley

    wcriley

    Apr 5, 2010
    Western PA
    It probably has a 4 pole connector, but it only has two conductors. No problem.

    Does the Sunn cab have a tweeter?
    If it does, and you engage the "Woofer Hi Cut" on the amp (as you should if you're biamping the G-K cab), the tweeter won't be doing much.
     
  6. Apr 18, 2012 #6
    brotondo

    brotondo

    Feb 7, 2012
    Kimball MI
    The Speakon is just a new fancy type of connector as far as i know, if you got the cable that adapts it to 1/4 your set there. i would be concerned about the actual ohm rating of the 15, get a digital multi-meter (harbor freight sells em for $5) measure the resistance(ohms) between the +/- of the 15 and that is your rating for that cab. I'm not familiar with the GK 700 as far bi-amping, but cabs used in parallel the ohms are cut in half, ex. using 2x 8 ohm cabs, you would put them in the 4 ohm outputs.running the cabs in a series doubles the load, ex. 2x 8 ohm cabs, the load would be 16 ohms. whatever, just read Gk's owner manual, solid state usually isn't too picky about it.
     
  7. Apr 18, 2012 #7
    mattamatician

    mattamatician

    Apr 18, 2012
    In the user guide that comes with the Amp they list it as running 480 Watts at 8 Ohms. The 410Neo cab is rated either 4 or 8 Ohm. I am assuming the Sunn 1 x 15 can too? I don't what model it is even. The amp has two speakOn outs and 2 1/4 outs. I tested it with the Neo connected to the Speakon and biamp and the Sunn connected to one of the 1/4" jacks. I played abit at low volume and it seemed ok. I will go to HF and get a multimeter, I need one. Thanks!
     
  8. Apr 18, 2012 #8
    B-string

    B-string

    Nov 21, 2008
    Lake Havasu City, Az USA
    You can use the 1/4" jack if you want for the Sunn cab. The NEO410 is available in 8 ohm or 4 ohm models. It will be one or the other, it is not switchable between 4 or 8 ohm. There is no way for anybody to make a 4/8 ohm 410 cab. :)

    And yes the Hosa cable is a 4 pole connector with only 2 wires using the 1+,1- that normally goes from the G-K amp to woofers anyway. ;)
     
  9. Apr 18, 2012 #9
    mattamatician

    mattamatician

    Apr 18, 2012
    Thanks B-string.Let me see if this is straight. The cabs are always either rated at 4 or 8 Ohms, but it is the Amp which feels a 4 Ohm load, having two 8 Ohm cabinets connected in parallel. It would become a 16 Ohm load if they were in series. I know that the Neo410 is 8 Ohm, and I will measure the Sunn Cab, although I'm pretty sure its 8 Ohm. Is it the case that even though Hosa has a 4 pin connector, because the other end is 1/4" it is essentially two out? If this is the case why would they recommend a 2 connector to 1/4 in the manual? Thanks for your explanations.
     
  10. Apr 18, 2012 #10
    BassmanPaul

    BassmanPaul Inactive

    Aug 25, 2007
    Scarborough Ontario Canada
    It is inadvisable to run a single 15 with a 4x10. You'll just end up destroying it. Do a search on the subject - it comes up just about every other day!
     
  11. Apr 18, 2012 #11
    B-string

    B-string

    Nov 21, 2008
    Lake Havasu City, Az USA
    The amp IS loaded BY the speaker cabs. 4ohm load max output power, 8 ohms load less power, 16 ohms even less output power (Most all SS amps are this way).
    Speakons are more secure and do not short before make like 1/4" plugs. A short is 0 ohms and very bad for SS amps, the lower the number in ohms the heavier the load placed on the amp.

    Trying to avoid his next post Paul? ;)
    The 115 will not stand the strain the 410 will so keep an ear to it.
     
  12. Apr 19, 2012 #12
    mattamatician

    mattamatician

    Apr 18, 2012
    Thank you BassmanPaul, B-String, brotondo, and wcriley! I really appreciate your input. @BassmanPaul - I will be careful with the volume.