SDA clone?
Comments
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It's not surprising at all. See the pile of crap he left in Trey's FS thread? lol--Gary--
Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out. -
Nope, and even the 50hz crossover is arguable. All the information you need is out there.50hz? you're joking right? with all the SDA thing, I think there are more than 2 XO points."He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche -
50hz? you're joking right? with all the SDA thing, I think there are more than 2 XO points.
Those are the specs that Polk published. I did not do any measurements to verify and I don't know if anyone else has. It is possible that there was a typo in the published specs and it is also possible that there may be "secret" crossover frequencies pertaining to the dimensional drivers. You may want to verify all this with Polk's customer service.
The response below 50 Hz is dominated by the passive radiator.Proud and loyal citizen of the Digital Domain and Solid State Country! -
sometimes the amazingly complex results are from the simplest implements.Polk Audio SDA CRS+ crossover 4.1TL by Trey/VR3 (Rings and custom stand by Larry)-Polk Audio SDA SRS2 crossovers by Trey/VR3Parasound HCA1500aYamaha rxa-3070 with musicast-Celestion SL6S presence,- sl9 surround backNHTsuper1's surroundMagnepan SMGParasound 1500pre- Sofia "Baby" tube amp - Monitor Audio Silver RX2 Marantz 2230/B&Kst140Technics 1200mk2 Gamertag: IslandBerserker I am but a infinitesimally small point meeting the line of infinity in the SDA universe
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Given the size (6.5")of the woofers, 50hz is probably as low as they can go anyway.
I remember reading somewhere that there is another XO point at 150hz for the 4 woofers running normal signal (not SDA signal from the other side). is there any truth to this?
BTW, I just noticed that the tweeters aren't pushing SDA signal at all according to the Sticky. If that is true, then 2 tweeters in each tower are pushing the same frequency? if not, then isn't there another XO point? -
Given the size (6.5")of the woofers, 50hz is probably as low as they can go anyway.
I remember reading somewhere that there is another XO point at 150hz for the 4 woofers running normal signal (not SDA signal from the other side). is there any truth to this?
BTW, I just noticed that the tweeters aren't pushing SDA signal at all according to the Sticky. If that is true, then 2 tweeters in each tower are pushing the same frequency? if not, then isn't there another XO point?
Depending on model and especially generation the x-over points and the drivers affected are different.
Certain generations SDA the tweeter were part of the SDA signal (with the side by side tweets). Later generations with multiple vertical tweeters use what's called a "progressive point source" and each plays at a different output level combined create a single point source.
Get your Google search on, especially and the POLK SDA website and start reading reviews as well as the Polk literature from over the years. It explains a lot of your questions, as well as several SDA threads on CP. I know it can be tedious to do the research, but if you aren't willing to put in the effort to get the info you need then maybe you should rethink the "clone". I and others are tired of constantly re-tracing all the same questions. I found the information somewhere originally, I'm sure you can too.
Good luck
H9"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul! -
Driver size has very little to do with their ability to dig to a certain frequency. There are pro audio 8's that don't play below 100hz, meanwhile there are 6.5's that dig down to 20hz.Given the size (6.5")of the woofers, 50hz is probably as low as they can go anyway.
FYI: http://www.polkaudio.com/forums/showthread.php?130994-Freq-Resp-for-MW6502-driver&p=1747515#post1747515"He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche -
slight derail
anyone have an idea about how low the mw6600 digs? -
IIRC, the 6503 is the 6500 replacement, so it should be similar."He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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IIRC, the 6503 is the 6500 replacement, so it should be similar.
well yes that is correct, I'll have to check ohms on a 6600 I seem to remember they were lower ohms than listed. My sda's use 3 6600 and a 6501 for dim. anyhoo thanks Face -
Did you ever fallow through with the experiment? The SDA's in these Troels Gravesen PMS would be interesting.
Home Theater & Listening
RECEIVER Yamaha HTR6180
FRONT AMP McIntosh MC2125
THEATER AMP EMOTIVA XPA 7
FRONT Polk SDA 1B
CENTER Polk CsiA4
SURROUND LR KEF Cresta 30
REAR Polk Monitor 5
SUB Tannoy TS 10 Subwoofer
NAS 20 TB Raid 3 QNAP
Office
AMP Luxman L210
SPEAKERS Tannoy
