SDA-less
Comments
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If you are not planning on using them As SDA's which once you hear them you will change your mind. If not sell them and get some regular speakers.
You are not using all the speakers in your SDA's right now. Just the tweeters and one driver per cab without the SDA cable. -
Speaking as a EE who's owned SDA speakers since 1987...there's no DSP even in high-end consumer grade equipment that's likely to sound "better" than properly set up SDA. Obviously what sounds good to you will obviously be what matters--to each his own. But in my 7.1 setup, I A. have the SDA cable connected all the time B. turn off all the DSP modes for two-channel listening C. have had other folks who'd never heard SDAs before tell me that they'd sell the other (Polk LSi center/surround) speakers and just keep the SDA-CRS+ pair. So, your mileage may vary but don't discount SDA without hearing it. As Joe notes, right now there are drivers that aren't even playing in your existing speakers--adding a cable should be a cheap "upgrade".thank you oliver for the reply. i'll just try to make the cable myself. anyway, i really wont be needing that cable that much since i have a 7.1 setup and my yamaha has various sound field effects called DSP. my SDAs will just have to be front left and right channels. but im still curious about that SDA effect.
If money's a significant factor, I'd really hold off on the RTi A7 and first see what you have with the SDAs...
im saving myself for a pair of RTi A7. those would really complement my yamaha and the 7.1 setup without worrying about the ohms load factor. SDA's got 4 ohms while most of the speakers now have 8. im just using my SDAs for the meantime. lastly, money is really a great factor in building a stable and ear satisfying home theater!Current polk speakers:
Family room 5.1: TC265i R/L, VM10 Center, RC65i surrounds (couldn't match the TCs)
Basement non-dedicated 7.1 HT: SDA-CRS+ R/L, 255c-LS Center, LSiFX surrounds, RC80i in-ceiling rear surround, plus Wharfedale 12" sub (some day I'll get around to building 15" F-20 sub). -
Speakers are 2As, correct?You are not using all the speakers in your SDA's right now. Just the tweeters and one driver per cab without the SDA cable.
All drivers in the 2A are used even when SDA cable is not connected. Very similar wiring to the 1B, but with half the drivers, and some changes to the values of the caps and inductors and such. Only the very early SDAs had drivers that were completely dedicated to the dimensional circuit.
Without the cable, they shouldn't sound bad at all...Yes, it'll sound better (there will be some SDA effect) with the cable connected.
The 1Bs sound very similar with or without the SDA cable attached, the major difference being the lack of ESP (Extra-Speaker Presentation), where the soundfield extends beyond the outside edges of the speaker cabinets.
If the problem is that the amp/receiver won't appropriately drive a 4-ohm (nominal) speaker, the solution is more likely to be to dispose of the ampere-limited receiver for something that has an amplifier section that's designed properly. -
If the problem is that the amp/receiver won't appropriately drive a 4-ohm (nominal) speaker, the solution is more likely to be to dispose of the ampere-limited receiver for something that has an amplifier section that's designed properly.
I agree completely with the above suggestion from Schurkey. According to Home Theater Magazine's recent testing of the Yamaha Aventage line your receiver doesn't have the strongest power supply around. Although rated at 105 it only generates 54 with 5 channels driven & probably less than 50 with 7 driven. It may not be the right receiver for 4 Ohm loads.Sony 60'' SXRD 1080p
Amp = Carver AV-705THX 5-Channel
Processor = NAD T747
Panasonic BD35 Blu-Ray
Main = SDA-1C Studio with RD0s, spikes, XO rebuild, rings, I/C upgrade
Center=Polk CS10, Surround = Athena Dipoles, Sub= Boston 12HO
Music/Video Streaming = Netgear NEO550
TT = Audio Technica
