SRS-1.2tl

westmassguy
westmassguy Posts: 6,746
edited April 1 in DIY, Mods & Tweaks
Build consisted of @gimpod boards, new Mate-N-Lock connectors, hand matched Clarity PX Capacitors, hand tuning existing inductors, new mounts, and new hand tuned SuperQ Sub-Bass Inductors.
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Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
Interconnect: Furez 10/2 with SpeakONs
ICs: Custom Furez by Douglas Connections
Den:
Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
Carver CT-3 Pre, Carver C-500

dhsspeakerservice.com/



Comments

  • JayCee
    JayCee Posts: 1,236
    When you hand tune is this to measurement (spec), by ear and approximately how far off are they? Curious minds....how many of Tony's boards remain?

    Nice work, as usual!!
    Speakers: Polk1.2tl's (Uber Mods) Pre/Amp/DAC: PS Audio BHK Signature & 250, DirectStream Cables/IC's: MIT S1Bi-Wire/S1 Balanced +Avel Lindberg 1000VA "Dreadnought" Power Conditioner: PS Audio P15 Power Plant Power Cords: Core Power Technologies Gold, DH Labs Power Plus DIY w/Neotech NC-P301 & P311ends Streamer: Roon ROCK on wifi'd NUC & Uptone EtherREGEN, AfterDark, Emperor Double Crown Clock, Black Modernize LPS⟿Ω☯☥☮⟿🔊♩♪♫♬♩♪♫♬♩♪♫♬
  • Boost1
    Boost1 Posts: 13
    They turned out beautifully, Dave.....thanks! Currently warming them up inside of these guys and initial impressions are super favorable. I'll post some detailed impressions once they've burned in good....again, thanks for the great work and service!jv88vlfy0w61.jpg
    SDA SRS 1.2tl's
    Adcom GFA-585's
  • westmassguy
    westmassguy Posts: 6,746
    oldrocker wrote: »
    Nice

    Thanks
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/



  • westmassguy
    westmassguy Posts: 6,746
    JayCee wrote: »
    When you hand tune is this to measurement (spec), by ear and approximately how far off are they? Curious minds....how many of Tony's boards remain?

    Nice work, as usual!!

    I use an Inductance Meter, and always tune them to spec. If they are slightly low, less than 2% or so, I'll match the opposite channel. I'd rather they be slightly low, but matched within les than 1%, than mismatched.
    Tony's boards are no more. All gone.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/



  • msg
    msg Posts: 6,595
    Nice, Dave, clean.
    What did you use for the mounts, and what are those two white strips?
    Is that a threaded insert in the center?
    I disabled signatures.
  • westmassguy
    westmassguy Posts: 6,746
    msg wrote: »
    Nice, Dave, clean.
    What did you use for the mounts, and what are those two white strips?
    Is that a threaded insert in the center?

    Scott, the mounts are made from 1/2" MDF, same size as the original circuit boards. There's a 1/4-20 Hurricane nut in the center, and I send along new, shorter cap screws. The white strips are foam tape. Once you tighten the cap screws, the foam tape compresses and keeps the crossover from spinning or vibrating.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/



  • msg
    msg Posts: 6,595
    Looks great, and a nicely thought out design extra.
    I disabled signatures.
  • pitdogg2
    pitdogg2 Posts: 19,227
    Damn I should have bought another set before they vanished.
  • audioluvr
    audioluvr Posts: 3,621
    Build consisted of @gimpod boards, new Mate-N-Lock connectors, hand matched Clarity PX Capacitors, hand tuning existing inductors, new mounts, and new hand tuned SuperQ Sub-Bass Inductors.
    njqnml75su6l.jpg

    I like how the resistors are on the back of the board to keep the heat away from those pretty, new caps! Nicely done Dave!
    Cambridge Audio 851N Streamer/DAC
    Belles 21A Pre modded with Mundorf Supreme caps
    B&K M200 Sonata monoblocks refreshed and upgraded
    Belles 350A Reference modded with Mundorf Supreme caps
    Polk SDA 1C's modded / 1000Va Dreadnaught
    Wireworld Silver Eclipse IC's and speaker cables


    There is about a 5% genetic difference between apes and men …but that difference is the difference between throwing your own poo when you are annoyed …and Einstein, Shakespeare and Miss January.

    by Dr. Sardonicus
  • JayCee
    JayCee Posts: 1,236
    edited April 2
    njqnml75su6l.jpg

    Scared the crap out of me. I saw the 2 resisters on R5 in series and thought that's not what I did back in 2011. Pulled up a pic and I have much different values. Jumped on Gimpod's placement site and verified. I have 22 and 24.9, parallel, but he gives the series example, as you have. First thought...oh $hit...they've been wrong for 10 years?

    I'm no electronics tech but am capable of soldering XO's and following directions, so quick Google search for resister calculator, 2 in parallel, and see my values, combined, are very much within tolerance of the 11.5 ohm spec. Whew. Pucker factor back to zero.
    f41dl54jpjhh.png

    My board:
    5c7wk4zdcvb4.jpg
    Quite sure I did the research back then and have done 4 sets of additional XO's but didn't need to double up, that I recall. Obviously, I have different values and probably worked through this w/Jeff @ Sonicraft when I ordered the parts. All this to say....I don't recall the discussion. Are there pros/cons to series vs. parallel or do you have a preference?
    Speakers: Polk1.2tl's (Uber Mods) Pre/Amp/DAC: PS Audio BHK Signature & 250, DirectStream Cables/IC's: MIT S1Bi-Wire/S1 Balanced +Avel Lindberg 1000VA "Dreadnought" Power Conditioner: PS Audio P15 Power Plant Power Cords: Core Power Technologies Gold, DH Labs Power Plus DIY w/Neotech NC-P301 & P311ends Streamer: Roon ROCK on wifi'd NUC & Uptone EtherREGEN, AfterDark, Emperor Double Crown Clock, Black Modernize LPS⟿Ω☯☥☮⟿🔊♩♪♫♬♩♪♫♬♩♪♫♬
  • westmassguy
    westmassguy Posts: 6,746
    audioluvr wrote: »
    Build consisted of @gimpod boards, new Mate-N-Lock connectors, hand matched Clarity PX Capacitors, hand tuning existing inductors, new mounts, and new hand tuned SuperQ Sub-Bass Inductors.
    njqnml75su6l.jpg

    I like how the resistors are on the back of the board to keep the heat away from those pretty, new caps! Nicely done Dave!

    Thank you
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/



  • westmassguy
    westmassguy Posts: 6,746
    JayCee wrote: »
    njqnml75su6l.jpg

    Scared the crap out of me. I saw the 2 resisters on R5 in series and thought that's not what I did back in 2011. Pulled up a pic and I have much different values. Jumped on Gimpod's placement site and verified. I have 22 and 24.9, parallel, but he gives the series example, as you have. First thought...oh $hit...they've been wrong for 10 years?

    I'm no electronics tech but am capable of soldering XO's and following directions, so quick Google search for resister calculator, 2 in parallel, and see my values, combined, are very much within tolerance of the 11.5 ohm spec. Whew. Pucker factor back to zero.
    f41dl54jpjhh.png

    My board:
    5c7wk4zdcvb4.jpg
    Quite sure I did the research back then and have done 4 sets of additional XO's but didn't need to double up, that I recall. Obviously, I have different values and probably worked through this w/Jeff @ Sonicraft when I ordered the parts. All this to say....I don't recall the discussion. Are there pros/cons to series vs. parallel or do you have a preference?

    Both parallel and series are acceptable. I have no preference, all depends on what's available from my vendors.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/



  • Gardenstater
    Gardenstater Posts: 1,991
    The same power should be dissipated by each resistor, regardless of parallel or series. We know that power dissipation is in the form of heat which increases thermal noise but should be the same in each case.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • xsmi
    xsmi Posts: 1,653
    Great job Dave!
    2-channel
    Belles 22A Pre, Emotiva XPA-2 Gen 2, Marantz SA8005, Pro-Ject RPM-10 Turntable, Schiit Mani Phono Pre, Moon LP 3 Phono Pre, Polk Audio SDA-SRS, AudioQuest Cable throughout.
  • westmassguy
    westmassguy Posts: 6,746
    xsmi wrote: »
    Great job Dave!

    Thank You
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/