Bi amping SDA 3.1 speakers?

ThomasRThomasR Posts: 7
edited June 21 in Vintage Speakers
I've had my SRS 3.1 speakers since I bought them new back in day. I'm looking at some things to spice them up a little (tweeter, crossover mods) . One thing on my mind is bi amping them. I have a Adcom GFA-545 amp 100 watts, I have access to another one. Is there noticeable benefit to bi amping? I thought I would get some opinions before buying a bunch of speaker wire.


  • honestaquarianhonestaquarian Posts: 2,506
    OH you are about to open a can of worms style debate!! :D :D
    (meaning it depends on with whom you talk. Also please remember you need an isolation transformer in your crossfeed cable. I.E. an AI-1 OR a dreadnaught if you're doing upgrades)
    I STRONGLY recommend either having @vr3 do your crossovers or talking to @westmassguy if what Trey charges is a bit steep.
    I have heard biamping to good effect and to no effect myself btw.
    It depends a LOT on the speakers and equipment.
    Living room Home theater: Upgrade Company modified Onkyo PR-SC5509,Sunfire Cinema grand Signature 5 channel amp(1st gen),Carver TFM-45,Carver M-400a,Panasonic TC-P50ST60 50" Plasma(last gen before Plasma production stopped)Pioneer Elite DVL-91,Meridian 519 Dolby AC-3 RF Demodulator,Oppo Digital UDP-205,TiVo Bolt VOX,Nakamich BX-300,Technics SL-1200MKII,Shure V15 Type VxMR cartridge,Polk SDA-SRS 3.1 TL(with RD-0198 tweeters, upgraded with Larry's rings, black hole5,an Avel-Lindberg 1000VA isolation transformer, VR3 customer crossovers and internal wiring),Polk CS-1000P(with SL-6506 tweeter),Polk Monitor 5jr(with RD-0194 tweeters),Polk RT-35i (1),Polk Mini Monitors,Polk PSW150(4)Monster Power HTPS 7000 MKII Signature series,Monster Power AVS 2000 Signature Series,Various MIT,Monster,Upgrade Company and Belden interconnect,power,HDMI,Coax and Toslink Digital and speaker cables.

    Bedroom 2 channel system:Integra DTM 40.4,Nakamichi BX-100,TiVo mini,Musical Fidelity X-LPS,X-PSU,Carver TFM-25,Sony KV-34XBR970(last of the widescreen tube sets before production stopped)Technics SL-1200MKII,Shure V15 Type V MR cartridge,Polk RT-55(with SL-6506 tweeters),Polk PSW-200 in plexiglass(2),Sony Playstation 3 slim.Monster Power HTPS-7000,Monster AVS-2000, PowerVarious Kimber,Audioquest and MIT interconnects and speaker cables.
  • SchurkeySchurkey Posts: 1,895
    Seems like a lot of effort to separate two tweeters from the rest of the drivers. If you have an amplifier that can power the speakers as-is...I'm not sure you're really gaining anything but expense and complexity.
  • F1nutF1nut Posts: 42,906
    Getting a better amp will net greater pleasure.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

  • ThomasRThomasR Posts: 7
    F1nut wrote: »
    Getting a better amp will net greater pleasure.

    I hear you on a better amp, I'm just trying to use what I have available to improve the sound with as little additional $$ as possible outside of improving the speakers. The additional Adcom amp is a freebie. I have RD0 198 tweeters on the way and installing them is about it it for my tech abilities. Woodworking is my forte, I can build a nice chair to sit and listen to them, that's about it.
  • Mike ReeterMike Reeter Posts: 3,518
    I don't think Bi-Amping the 3.1TL's, with only one tweeter per cabinet, would be very beneficial. Bi-Wiring "might" be a better option.

    Or, get some better quality jumpers on the Binding Posts and a better Amplifier as Jesse has recommended.

    The 3.1's are VERY easy to drive, Bi-Amping would be a waste of time/money IMHO.
    SDA SRS 2.3TL's/SDA SRS 3.1TL's/SDA CRS+4.1TL's and some other stuff
  • ThomasRThomasR Posts: 7
    Well strike one on that idea. I'm trying figure out best bang for the buck, so let me toss this out there. I'm running the amp off an Adcom GTP-500 preamp. It had good reviews when I bought it (1990ish) but probably not the best these days. What effect does the preamp have on the overall sound and is that something worth looking into as a way to improve the sound?
  • SchurkeySchurkey Posts: 1,895
    There certainly are better preamps. Even so, I bet that Adcom is no slouch.

    I admit that I never had an interest in the Tuner/Preamps. I had a GFP-565 for a couple years, liked it a lot. It went away when I went multi-channel with a preamp/processor.
  • gp4jesusgp4jesus Posts: 1,250
    edited June 23
    F1nut wrote: »
    Getting a better amp will net greater pleasure.
    As much as I’ve enjoyed the perks of NO passive filters* in my system, unless you have a thorough understanding of those XOs, I believe going active would likely be a step back.
    * tri-amping

    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, DirecTV Rcvr, Xbox 360, Dennon LDP, Phillips CD chgr

    Canare 14 ga - LCR tweeters inside; CC outside
    BJC 10 ga - LCR mids, inside & out
    8 ga Powerline - LR woofers, inside & out

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB985 -> tri-amped CSi A6
    5 Audio Pro Subs: 1 B1.39: an Evidence at each corner
    Surrounds: Hafler XL280 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
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