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Discussion Starter · #1 ·
First off I'll start by saying that this is not a "commercial" for the product I'm about to discuss, but merely a commentary on the effectivenes of a high quality AC line conditioner on a DVD video signal. Having said that, my story begins with a visible and annoying AC-related interference that drove me crazy whenever I plugged the DVD into the receptacle nearest to the equipment rack. It looked like horizontal lines/noise in various areas of the screen. If I used a long extension cord to plug the DVD into another receptacle, it dissapeared. I tried every combination imaginable (with the equipment) with no success, the juice from the plug was apparently foul.


Being the smart person I am (or think I am), I purchased one of those Monster strips that the magazines rave about. Not the huge voltage stabilizer but the strip with level 2 filtering (whatever that means). I get home, plug the strip into the offending plug, plug the DVD into the Monster strip location marked as "DVD" and give the system a whirl with my fingers crossed. Could it be ? Ah, nope. No change whatsoever, not in the slightest. At this point I started using the extension cord I referenced a while back and let it be.


Fast forward a few months, and this weekend I decided to visit a local dealer who sells products by PS Audio ( http://www.psaudio.com ). They sell quite a number of AC-related products (among other things) that seem to make some sense. They don't sell black boxes that magically help your system, instead they open up their boxes and explain exactly how they work. Bottom line, I decided to buy one of their more simple products: an Ultimate Outlet coupled with a Micro Lab AC cable. Got home and tried it on a headphone setup I have (Linn Karik/Numerik, HeadRoom Cosmic, Sennheiser 580) and the difference was not subtle. All I can say is that I listened for quite a while to entire songs (an amazing feat for audiophiles).


Last night I got around to unplugging the headphone rig and plugging the receiver and DVD player. Once again I crossed my fingers and flipped the switch. Could it be ? Hey, wait a second this looks good. No scratch that, this looks VERY good. Guys and gals, the difference is quite outstanding. If the difference made on the audio rig was considerable, then the impact on the video side was nothing short of amazing. The most obvious difference was a the total lack of artifacts or extraneous noise, we are talking CLEAN. This in place lead to an image depth that wasn't there, to colors with punch yet very accurate and smooth, to less dither artifacts on dark scenes, to a great WOW ! I'll say this, I watched movies into very late in the evening with a setup I've had for over a year.


All things said I can't rant enough on the impact of a clean AC line going into your equipment, specially your DVD player. I will try the box on the projector side and see what impact it has, but regardless of the outcome I'm now an official believer and evangelist to good quality AC treatments.
 

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Discussion Starter · #2 ·
BTW, the equipment mentioned is as follows:


DVD: Panasonic RP82 and RP56 (macrovision/region hack)

Receiver: Yamaha DSP-A1

Projector: NEC LT-84 (Thumperized) shooting through Panamoprh P752

Screen: Stewart StudioTek 1.3 84" (4:3)

Video Cable: Mogami RGB 50FT
 

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Sergio,


Try one of those boxes that produces balanced current. Mine is by EquiTec, takes a 220 input and outputs a neg 60/ positive 60 sinewave of power, but I am sure that other brands do a similar job. I was completely blown away by the lowered noise floor and by the clarity of the sound.


I came to scoff and stayed to pray. Art
 

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Balanced power is for real -- it has been recommended as part of the National Electrical Code for sensitive electronic equipment. It uses common mode rejection to filter out power line noise (same concept as balanced interconnects). Other manufacturers are Transcendent Sound, Blue Circle and Balanced Power Technologies. I've bought a Blue Circle MR1200 which is currently being shipped to me.
 

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Just don't plug your main two channel stereo amplifier in your line conditioner. I had my B & K plugged into my Monster HTS3600. It definately cut down on the noise, but flattened the dynamics. It does an excellent job on all digital components though. I wound up making a Chris V power cable, and bought an Arrow Hart 6300 wall outlet. I plugged the amp straight into the wall, and it sounds so much better than when it was plugged into the power conditioner.
 

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The Music Ring MR800 has 6 outlets and has a list price of $699. You can definitely get it for less. Check the reviews of the product and they'll mention a mail-order retailer that sells for a substantial discount.


The BPT BP-1 has 10 outlets. List price is $699.


The Transcendent Sound Balanced Power Supply is $399. It has one outlet and ships with a 6 outlet power strip. You can get a very high quality 6 outlet power strip for $250 from http://www.boldercables.com/Store.as...42&s=AC+Power.


Good point about how power conditioners/filters can be current limiting / limit dynamics of amps. But, not all are. A balanced power supply won't limit current provided that you're not driving it too close to its limits. Users have tried the Odyssey Stratos Xtreme monoblocks with large balanced power supplies and noticed no negative impact on dynamics.


I've got a Music Ring 1200 on the way. It can handle 1200 watts. At maximum, my entire audio system plus TV draws about under 600. I don't expect dynamics to be limited at all. It helps that my amp is digital and is very power efficient.
 

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I am running 7 separate amps, 5 mono blocks, 200 watts, for center and surround, stereo class A, 200 watts, for the mains and a stereo class AB 400 watts for the subs. These are run through a Panamax 5500 which has an amp meter on the front. My entire system draws about 6-7 amps at moderate volume levels. During DD soundtrack playback it increases to 8-10 on peaks. I have a dedicated 20 amp feed to the Panamax and have found no instances where I have sensed reduced dynamic range or current limited output. The Panamax has dedicated outlets for power amps, analog and digital equpment.
 

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Powerplay,


You are aptly named! I was using a Panamax before switching to EquiTec. I have, as you, seven channels 250/500 watts, etc. I switched to a 110 pound balanced power unit and have not experienced audible problems with power supply. I also use a couple of Grays's magnetic units. I don't know if one can use a smaller balanced power box and provide enough power for the sort of amps that a theater requires. Mine is not even near the largest that Equitec manufactures. Art
 

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I imagine higher priced, better conditioners wouldn't affect the dynamics of an amp much. I'm sure my system doesn't match a lot of yours. The Monster HTS3600 has analog, digital, and high current analog outlets. I may try it again with my new power cord and see what happens. It has 10 outlets and cost $325. It's great on digital and video material.
 
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