Tri-amped CSI A6

gp4jesus
gp4jesus Posts: 1,658
edited January 2017 in DIY, Mods & Tweaks
Finished & reassembled as of 4p today, Jan 2nd, 2017!

Blends better now w/ Tri-amped LR*. Sibilance is a memory!
* http://forum.polkaudio.com/discussion/174880/tri-amped-rti-a7

Build notes:
1. A nod to Jesse (F1nut) - mids held in by hurricane nuts & the requisite machine screws
2. Same DC blocking cap on tweeter - ClarityCap PX 68uf
3. Canare 14 soldered to tweeter
4. BJC 10 gauge soldered to mids
5. Same binding post upgrades
Only one pic...

26ni3u9yqy3p.jpeg
Samsung 60" UN60ES6100 LED
Outlaw Audio 976 Pre/Pro
Samsung BDP, Dish Rcvr, Xbox, 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
*soldered

LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
CC: Rotel RB981 -> bi-amped CSi A6
5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
Power Conditioning & Distribution:
3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
Post edited by gp4jesus on

Comments

  • gp4jesus
    gp4jesus Posts: 1,658
    Omitted Build Notes:
    6. five coats of Flex Seal* applied to interior - something different & untried
    7. Armaflex on mid magnets, frames, & closure walls - as w/the other speakers
    8. mineral wool gently tucked in between Power Port tubes & closure walls
    * does, by its self, help to reduce closure ringing
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • gp4jesus
    gp4jesus Posts: 1,658
    One person's reality may be another's "Holy...!"
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • lightman1
    lightman1 Posts: 10,651
    Tony goes for broke! Keep us posted on further results when everythings cooks for a couple hunert hours. Interesting project.
  • gp4jesus
    gp4jesus Posts: 1,658
    edited January 2017
    Update. Everything XO'd @ ~2K, 4th order. I expect some heat for this.

    Did a bunch of listening w/the XOs set as closely to Polk's specs as possible. Then I reset them to the above. Seemed cleaner, w/ the same FR. Makes sense given that those mids will beam above 2.3K.

    Polk specs their filtering, all 2nd order, as follows:
    tweeter: 2.2kHz
    mids @ 1.5kHz & 3.8kHz, -6dB

    Side note 1: triamping my center increases available power to 100 watts per driver. Added a real 100+ watts across my front.

    Side note 2: discovered my pre/pro allows English or metric distance settings - increments either 6" or .1 meter = ~4".

    Enjoy.
    Post edited by gp4jesus on
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • gp4jesus
    gp4jesus Posts: 1,658
    edited January 2017
    Watching "Days of Thunder" on Blu-Ray @ -11... ...priceless!
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • K_M
    K_M Posts: 1,602
    What happened to the built in crossover?
    Lsi15, Lsi9, LsiC,Rta11t,M5jr+,M4, SDA SRS 2.3TL, Rti6....Still listing stuff, a work in progress.
    B+W-Sold
    Electro Voice EV-SIX
    Infinity-Sold
    Advent-Now gone
    Yamaha A-S801
    Yamaha RX-V377
    Yamaha RX-A860
    Yamaha RX-A3060
    Harman Kardon Hk-350i
    Harman Kardon Hk-........
    Harman Kardon PM-665
    Harman Kardon HK-775
    Pioneer.......Stereo Receiver

  • gp4jesus
    gp4jesus Posts: 1,658
    K_M wrote: »
    What happened to the built in crossover?
    Its in a box along w/ 2 RTi A7 XOs

    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • gp4jesus
    gp4jesus Posts: 1,658
    Long story short: the next (rare) chance I get the house to my self I’m swapping in a 981 for the 985. I give up some power but I’ll PU some fidelity.

    The Rotel community considers the 981, a near-baby 991, that series flagship. Whereas some consider the 985, essentially a 5 X 100 watt version of the 980*. Unfortunately “shoehorning” that much technology into a chassis only slightly taller than a 980/1 demands some compromises.
    *the 981’s predecessor.

    Until then... Tony
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • gp4jesus
    gp4jesus Posts: 1,658
    “...then...” arrived today!

    Swap out the 985 for a 981. Cleaner, softer treble.

    Side note: about a month ago, the tweeter’s lower frequency range “quit.” Sounded REALLY thin. Swapped it for one of my un-used RTi A1 tweeters. Slightly different bezel but otherwise a drop-in - same tweeter.

    I have my eye on this...

    https://www.parts-express.com/Peerless-OC25SC65-04-1-Textile-Dome-Tweeter-264-1018

    ... as an inexpensive replacement. Polk wants $65 - too much for that tweeter. Removing the old one from the bezel took some effort - held in by a rubbery glue. Could be an inexpensive upgrade for any RTi/RTi A series speakers.

    Until next time..
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • la2vegas
    la2vegas Posts: 189
    gp4jesus wrote: »
    “...then...” arrived today!

    Swap out the 985 for a 981. Cleaner, softer treble.

    Side note: about a month ago, the tweeter’s lower frequency range “quit.” Sounded REALLY thin. Swapped it for one of my un-used RTi A1 tweeters. Slightly different bezel but otherwise a drop-in - same tweeter.

    I have my eye on this...

    https://www.parts-express.com/Peerless-OC25SC65-04-1-Textile-Dome-Tweeter-264-1018

    ... as an inexpensive replacement. Polk wants $65 - too much for that tweeter. Removing the old one from the bezel took some effort - held in by a rubbery glue. Could be an inexpensive upgrade for any RTi/RTi A series speakers.

    Until next time..

    Less than 8 bucks! If it works, that's a heck of a deal.
  • gp4jesus
    gp4jesus Posts: 1,658
    edited April 1
    We’ll see.

    I compared the dimensions of the two tweeters and, also, mine w/the pictures of the Peerless. They are remarkably similar, if not the same. So much so, coloring aside, the only obvious difference is a heat sink screwed and glued to the back! So it should fit w/little issue. We’ll see...

    Kinda makes me wonder if Peerless made the original for Polk. Polk has used several different model Peerless tweeters in many of their products over the years. We’ll see...

    A few folks on the forum know one has several choices if they’re displeased w/their RTi/RTi A series speakers’ infamous upper frequency response or SQ:
    a. upgrade the XO components w/particular attention to tweeter filtering
    b. like me, go electronic and, as appropriate, either bi or tri-amp them*
    c. Buy something else
    d. Live w/them though some really their sound as is.
    *https://forum.polkaudio.com/discussion/174880/tri-amped-rti-a7#latest

    In closing when they get here, I’ll use a pair of RTi A3s* as a test, swapping a Peerless into one and do a bunch of listening. Then I’ll upgrade my system starting w/the ‘A6. What will make doing 5 channels easier for me is a pair of idle RTi A3s* and have a couple of blown tweeters’ bezals w/which to install the Peerless. This will reduce any channels’ speaker’s down time to a few minutes.
    *in reserve to, one day, expand to 7 channels

    We’ll see... Tony
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • gp4jesus
    gp4jesus Posts: 1,658
    In my March 30th post I neglected to make it clear my ‘A6 is now bi amped.

    Yeah the mid/woofers share a channel. I’m OK w/that though as they are two 4 ohm drivers in series - easier load, cooler running amp, plenty of available power.
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • gp4jesus
    gp4jesus Posts: 1,658
    The “mounted*” CSi A6 diffraction pad** from Trey.
    qrqjrilvi81h.jpeg
    *prior to Velcro, I relied upon the grill to hold it in place.

    No SQ eval comments with & w/out grill as I haven’t watched any movies since applying Velcro. For that matter I haven’t done any with & w/out DP** listening as I’m overwhelmed w/the “honey doo” list
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
  • F1nut
    F1nut Posts: 45,749
    Well, get that list done and get back to work :)
    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

  • gp4jesus
    gp4jesus Posts: 1,658
    edited June 17
    F1nut wrote: »
    Well, get that list done and get back to work :)
    😅 I appreciate your boot to my backside!

    My 13 year old son is game CRAZY using my system!
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 976 Pre/Pro
    Samsung BDP, Dish Rcvr, Xbox, 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
    *soldered

    LR: tri-amped RTi A7 w/Rotels. Woofers - 980BX; M&T - 981
    CC: Rotel RB981 -> bi-amped CSi A6
    5 Audio Pro Subs: LFE & CC - B1.39; all others - Evidence
    Surrounds: Rotel 981 -> AR 12 ga -> RTi A3
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
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