SDA CRS+ With an External Crossover Twist.... :-)
Toolfan66
Posts: 14,629
Well I decided to pull out my CRS+'s and finally put in the Jantzen Inductors, and the 16mh Solen Inductor.. The Jantzen's I have had for 2+ years.. 
Well I have decided to build a new set of stands that will house the crossovers, 16mh inductor, as well as the binding post cup.
I will use the Neutriks to connect them together..
Why am I doing this? ah because I have the means to do so, and it should be a fun project, also I have been wanting to build a set with external crossovers..
I'm thinking the stands will be built out of steel, and the case to house the crossovers will be aluminum lined with dynamat, but will bolt to the stand, this should free up the air space in the cabinet.
I'm not really expecting anything out of this, if there is an improvement, Great!! if not, no big deal, it will still be a fun project...
I will update as I go!!!
Well I have decided to build a new set of stands that will house the crossovers, 16mh inductor, as well as the binding post cup.
I will use the Neutriks to connect them together..
Why am I doing this? ah because I have the means to do so, and it should be a fun project, also I have been wanting to build a set with external crossovers..
I'm thinking the stands will be built out of steel, and the case to house the crossovers will be aluminum lined with dynamat, but will bolt to the stand, this should free up the air space in the cabinet.
I'm not really expecting anything out of this, if there is an improvement, Great!! if not, no big deal, it will still be a fun project...
I will update as I go!!!
Comments
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I like it! Keep us posted.HT Optoma HD25 LV on 80" DIY Screen, Anthem MRX 300 Receiver, Pioneer Elite BDP 51FD Polk CS350LS, Polk SDA1C, Polk FX300, Polk RT55, Dual EBS Adire Shiva 320watt tuned to 17hz, ICs-DIY Twisted Prs, Speaker-Raymond Cable
2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable -
You're a crazy man Larry. Be sure to put plenty of space between the inductors and any ferrous or magnetic metals. Can't wait to see the results from the Steel Master.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/ -
Would Aluminum case and Dynamat negate that need? Would Mu metal be a better option?westmassguy wrote: »You're a crazy man Larry. Be sure to put plenty of space between the inductors and any ferrous or magnetic metals. Can't wait to see the results from the Steel Master.
http://www.ebay.com/itm/2pc-Ultraperm-80-Metal-Shield-MuMetal-Mu-Metal-Permalloy-Alloy-Shielding-Sheet/150626977011?_trksid=p2141725.c100338.m3726&_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=20150313114020&meid=b86d924366f4410f95d48db393337781&pid=100338&rk=1&rkt=21&mehot=pp&sd=160613440162
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Could. Not familiar with itHome 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/ -
Would Aluminum case and Dynamat negate that need? Would Mu metal be a better option?westmassguy wrote: »You're a crazy man Larry. Be sure to put plenty of space between the inductors and any ferrous or magnetic metals. Can't wait to see the results from the Steel Master.
http://www.ebay.com/itm/2pc-Ultraperm-80-Metal-Shield-MuMetal-Mu-Metal-Permalloy-Alloy-Shielding-Sheet/150626977011?_trksid=p2141725.c100338.m3726&_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=20150313114020&meid=b86d924366f4410f95d48db393337781&pid=100338&rk=1&rkt=21&mehot=pp&sd=160613440162
Looks interesting!! Thanks for the link!!
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westmassguy wrote: »You're a crazy man Larry. Be sure to put plenty of space between the inductors and any ferrous or magnetic metals. Can't wait to see the results from the Steel Master.
Yep that's the plan!!
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Why not something like plexiglass over an aluminum base so you can see the crossover?
Very cool, Larry, can't wait to see it.afterburnt wrote: »They didn't speak a word of English, they were from South Carolina.
Village Idiot of Club Polk -
Why not something like plexiglass over an aluminum base so you can see the crossover?
Very cool, Larry, can't wait to see it.
I actually thought about that but using acrylic..
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I think Plexiglas is acrylic.afterburnt wrote: »They didn't speak a word of English, they were from South Carolina.
Village Idiot of Club Polk -
Acrylic is stronger, well according to Progressive plastics anyway..
Edit: I might be thinking Lexan..Post edited by Toolfan66 on -
I think Plexiglas is acrylic.
Correct
http://www.hydrosight.com/acrylic-vs-polycarbonate-a-quantitative-and-qualitative-comparison/
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If you are looking for strength use Lexan. It's much stronger than plexiglass. If you get mad at the crossovers and decide to beat them out with a baseball bat the cabinet will break before the Lexan does.
- SDA 2BTL · Sonicaps · Mills resistors · RDO-198s · New gaskets · H-nuts · Erse inductors · BH5 · Dynamat
- Crossover upgrades by westmassguy
- Marantz 1504 AVR (front speaker pre-outs to Adcom 555)
- Adcom GFA-555 amp · Upgrades & speaker protection added by OldmanSRS
- Pioneer DV-610AV DVD/CD player
- SDA CRS+ · Hidden away in the closet
- SDA 2BTL · Sonicaps · Mills resistors · RDO-198s · New gaskets · H-nuts · Erse inductors · BH5 · Dynamat
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You can heat form small polycarbonate pieces in a home oven too.
I'm not sure how hot these resistors get, but be careful close to polycarbonate as it will sweat Bis-A and leak on your electronics. -
I have already decided to not use lexan or plexiglass..
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I have the material being cut, I ordered all the Neutrik's, Supra Rondo wire, and connectors..
I am also making new Binding Post plates, and Brass Spikes..
This stuff adds up fast when you go to ordering it..
I would really like to have the veneer re-done on the cabinets while i have them apart, I just don't know where to go to have it done.. -
So I want to do a left and right layout, anyone see this being an issue? I'm actually thinking about putting a wall between the 16MH and the crossover board, not sure if it's necessary just came to mind, keeping them separated..
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@Toolfan66
Are you planning on laying them flat or stacking them vertical like amp boards in a single enclosure or each crossover in its own enclosure.
I saw a skiing ninja modification of a X-static speaker that put the crossover on top of the enclosure but had ball bearings pass the signal through the enclosure and it was pretty bada$$ looking."....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963) -
Each crossover will be in its own enclosure as part of the stands, directly under the CRS cabinets...
They won't be laying flat, they will be mounted at a 45 deg angle in the case, because of the way the case will be designed to look good and fit the design of the stands.. -
Each crossover will be in its own enclosure as part of the stands, directly under the CRS cabinets...
They won't be laying flat, they will be mounted at a 45 deg angle in the case, because of the way the case will be designed to look good and fit the design of the stands..
Awesome man. I'm sure they will look great. Anything you touch turns to gold."....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963) -
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I hate you..... those look awesome!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/ -
Great job! Now can I buy them back when you're all done?
Sonus Faber Concerto Grand Piano, Klipsch, B&W DM602.5, Epicure 20+, T/E 280, 100V, Polk.
Subwoofers: Monitor Audio, B&W ASW300, Triad ProSub Bronze. -
These weren't yours, I have had these for a few years now..
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freakin master piece's .......I'd black chrome them
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These weren't yours, I have had these for a few years now..
Hehe... still can buy it.
Sonus Faber Concerto Grand Piano, Klipsch, B&W DM602.5, Epicure 20+, T/E 280, 100V, Polk.
Subwoofers: Monitor Audio, B&W ASW300, Triad ProSub Bronze. -
Just a personal thought......I might try to relocate that long resistor along the back of the board to clean up the look. I have never liked how those look cramped or wedged onto boards at odd angles.HT Optoma HD25 LV on 80" DIY Screen, Anthem MRX 300 Receiver, Pioneer Elite BDP 51FD Polk CS350LS, Polk SDA1C, Polk FX300, Polk RT55, Dual EBS Adire Shiva 320watt tuned to 17hz, ICs-DIY Twisted Prs, Speaker-Raymond Cable
2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable -
Dennis Gardner wrote: »Just a personal thought......I might try to relocate that long resistor along the back of the board to clean up the look. I have never liked how those look cramped or wedged onto boards at odd angles.
I agree, that's the only thing I don't like about the Dueland Resistors, but I will probably just leave it, it's been that way for a few years now..
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Nice work making those stands. You could probably sell many pairs of those. I know I for sure would buy a pair for my SDA-CRS speakers. You have some very fine skills sir.
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Them's nice, Larry. (But you didn't need me to convince you of that.)Jay
SDA 2BTL * Musical Fidelity A5cr amp * Marantz DV-9500 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
Micro Seiki DQ-50 * A hodgepodge of cabling * Belkin PF60
Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0 -
Thanks guys, did some final clean up on them, now I need to make the case that will house the crossovers..
