Installed 18 Gauge cable in wall. What am I going to loose?

Discussion in 'Accessories, Cables, and Remotes' started by Vlad_O, May 13, 2005.

  1. Vlad_O

    Vlad_O Auditioning

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    I hired some person, who installed the speaker cable in my house (inside wall).Basically he installed 18 Gauge cable.
    I have 5.1 Infiniti speakers and just ordered Harman/Kardon AVR 235 recev.
    Here is info from manual AVR 235 regarding cable:

    Regardless of the brand of cable selected, we recommend that you use cable constructed of multistrand copper with a gauge of 14 or smaller

    So, unfortunately I can't change cables.
    What am I going to loose? Can I loose something on high frequency? Or this is most issue for the bass?
    Can I loose something If I'm going to listen not with high volume?

    Thanks, Vlad
     
  2. John Garcia

    John Garcia Executive Producer

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    It depends on the length of the runs and the impedance of the speakers.

    IMO, I'd say you're pushing your limits with 18 ga. I generally recommend nothing smaller than 14 ga. also, so I would agree with the manual, assuming "smaller" means a lower ga. which is a larger wire to handle greater current. read the section below the table about resistance too high.

    http://www.roger-russell.com/wire/wire.htm#wiretable

    If any of the runs are over 50', you could lose quite a bit of capability in those speakers. Can you get away with it? Possibly. Is it a good idea? NO, not really. I'd seriously try to get them to re-run the wire.
     
  3. Bob McElfresh

    Bob McElfresh Producer

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    I echo the idea that you call the guy and tell him to replace the sub-standard wire.

    (At least - is the wire in-wall rated? With a CL3 jacket?. This could be your main excuse).

    The only issue that I know of is the high-frequency roll-off.

    To be realisic - if it is only for the rear speakers of a HT system, it's not all that bad.

    But if you wanted a 5.1 SACD music system, the wires should be 12 ga. The long run of thin wire WILL likely have an effect.

    You can always try your own listening test:

    - Disable the front speakers
    - Fire up a favorite movie/CD and listen to just the rears for a while. (a good 5-10 minutes)
    - Then re-wire the rear speakers with 12 ga run across the floor.
    - Listen again. Do you really notice a difference?
     
  4. Vlad_O

    Vlad_O Auditioning

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    Ok, here is my situation:
    Front(left, right) speakers about 15 feet each
    Rear (left, right) speakers about 35-40 feet each
    To replace them, I need to remove all moldings in room
    and probably to install a new one. A lot of work...

    Vlad
     

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