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  1. #1
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    Help connecting sub-woofer to vintage cr 820 Yamaha.

    Thanks for suggestions how to connect a sub-woofer to my Yam Cr 820 receiver.

    Help connecting sub-woofer to vintage cr 820 Yamaha.-capture.jpg
    Rear Panel:

    AC Outlet Unswitched (2)
    AC Outlet Switched
    classicaudio.com
    Antenna Inputs:
    300 ohm balanced, 75 ohm unbalanced, coaxial.
    AM Ferrite Bar Antennaclassicaudio.com
    Phono 1 (L, R)
    Phono 2 (L, R)
    classicaudio.com
    Aux (L, R)
    Tape 1 Playback (L, R)
    Tpae 1 Record (L, R)
    classicaudio.com
    Tape 2 Playback (L, R)
    Tape 2 Record (L, R)
    classicaudio.com
    Speaker Out A (L, R)
    classicaudio.com
    Speaker Out B (L, R)


  2. #2
    Forum Regular blackraven's Avatar
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    The only way I see is to get a sub with speaker level inputs. Meaning you connect the sub to the speaker out of the receiver and into the speaker inputs of the sub. Not all subs have these connections.

    SVS and HSU make subs with speaker level inputs.
    Pass Labs X250 amp, BAT Vk-51se Preamp,
    Thorens TD-145 TT, Bellari phono preamp, Nagaoka MP-200 Cartridge
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    Luxman DA-06 DAC
    Van Alstine Ultra Plus Hybrid Tube DAC
    Dual Martin Logan Original Dynamo Subs
    Parasound A21 amp
    Vintage Luxman T-110 tuner
    Magnepan MMG's, Grant Fidelity DAC-11, Class D CDA254 amp
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    Vintage Technic's Integrated amp
    Music Hall 25.2 CDP
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    Cables- Cardas, Silnote, BJC
    Velodyne CHT 8 sub

  3. #3
    Suspended topspeed's Avatar
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    Yup, like BR said, splice some wires into the speaker level out and hope your sub has speaker level inputs. Cambridge Soundworks also has speaker level on their subs.

  4. #4
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    Thanks very much.

  5. #5
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    Forgive the old school newbie ignorance but is this the type of input connection your referring to?

    Thanks again !

    Help connecting sub-woofer to vintage cr 820 Yamaha.-capture.jpg

  6. #6
    Shostakovich fan Feanor's Avatar
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    Quote Originally Posted by Brad Steinfeld View Post
    Forgive the old school newbie ignorance but is this the type of input connection your referring to?

    Thanks again !

    Click image for larger version. 

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    No; this sub has a very simple interface designed to accept only a single, mono 'LFE' (low frequency effects) directly from an AV receiver.

    You would need a sub that has left & right speaker ('high level') inputs (to receive the signals from you amp or receiver) and left & right speaker output to convey the signals onward to you main speakers.

    The back of a subwoofer so equipped would look something like this: not the 'From Receiver' and 'Out To Speakers' connections ...

    Help connecting sub-woofer to vintage cr 820 Yamaha.-subwoofer-w.-high-level.jpg

  7. #7
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    Thanks very much Feanor.

  8. #8
    Suspended topspeed's Avatar
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    You won't necessarily need speaker level outs on the sub, just so you know. You can run two pairs of wires from your Left/Right outputs on the receiver with one pair going to your main L/R speaker speakers and the other going to the speaker level inputs on the sub (which unfortunately, your current sub doesn't have based on the pic). Those are 5 way binding posts in Feanor's pic, which are the easiest to use as they accept banana's, spades, pins, or bare wire. Don't be surprised if you see spring loaded inputs on the sub exactly like the ones on the back of your vintage receiver.

    I'm not aware of any way to get the signal from your current receiver to your sub, sorry.

  9. #9
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    So this just came along on my local Craiglist.
    Am I correct this might fill my input /output needs to run the
    sub connect ?

    Thanks again for all the help.

    Help connecting sub-woofer to vintage cr 820 Yamaha.-00v0v_8p0ytdbnkva_600x450.jpg

  10. #10
    Phila combat zone JoeE SP9's Avatar
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    That has line level inputs. It also has speaker level inputs and outputs. You're covered regardless of how you want/need to connect it.
    ARC SP9 MKIII, VPI HW19, Rega RB300
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    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

  11. #11
    Shostakovich fan Feanor's Avatar
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    Quote Originally Posted by Brad Steinfeld View Post
    So this just came along on my local Craiglist.
    Am I correct this might fill my input /output needs to run the
    sub connect ?

    Thanks again for all the help.

    Click image for larger version. 

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    Yes, this is the configuration you need to use an amp or receiver without dedicated subwoofer output with a subwoofer.

    Just connect your speaker cables from your amp to the Speaker Level Input, and your speakers to the Speaker Lever Outputs.

    Also don't forget to ...
    • Set the sub's Volume level to so the sub's volume level is compatible with your main speaker volume
    • Set the Low-pass to integrate your sub with our main speakers -- the objective is to have little or no overlap of sub and main speaker outputs
    • It might be necessary to change the Phase for best results. Start with Phase = 0 then try Phase = 180; use the setting that yields the most sub output; then reset your Volume to match your main speakers.

  12. #12
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    Great.

    Thanks

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