grimmreapersound
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Posts posted by grimmreapersound
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Shielded cables are typically used for high impedance low power signals like a 4-20 signal for SCADA systems. Speaker wire is for low impedance high power signals. If you are getting interference thru the speaker wires you probably should run the wires away from that nuclear power generator.
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just wait a day or so. "westron" will surely pitch his standard anti-power conditionner diatribe.
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A small buzz is normal if your amp gain is cranked up to eleven!
I would look more towards induced noise rather than a ground loop.
Are you running unshielded speaker wire? Are these wires running parallel to power wiring?
Check these simple things first before looking at other potential noise sources.
An easy check for ground loops is to use your ears, 60hz or 120hz buzz are typical for ground loops.
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If anybody doesn't like/trust Brickwall,
then check out Furman power filters,
or if you want industrial based power filters, check out the Aegis line.
All of these units use series based filtering (series inductors with tuned capacitors), they are sometimes refered to as hybrid filters.
They do work differently from standard MOV based filters and they can take hit after hit.
MOV's are ok but they weaken after being hit and you eventually have to replace them, good for the manufacturers, bad for consumers.
If you want numbers, check out the manufacturers websites.
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Sorry if you don't quite believe the specs and an honest opinion.
I know it protected my gear in the past when ice storms played havoc on our area's power lines.
I'm just trying to be helpful and bring suggestions about gear that I know work well.
Take it or leave it.
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The arguments stated by westorm are valid. That is why I brought up the Brickwall. Here are the specs:
SPECIFICATIONS
Outlets Available 8 isolated by duplex (6 switched, 2 unswitched)
Load Ratings 15A at 120 volts, single phase, 50-60 Hz; full load regulation 1%.
Receptacle Isolation Low pass filter isolation assures >40db load to load isolation for EFT bursts.
Endurance Test 1,000 surges of 6,000 volts, 3,000 amperes, SRV <400 volts, no failures, L-N (ground wire protection) mode, U.S. Gov't. Mode 1.
Limiters Series surge reactor current limiter; cascaded, auto-tracking dual polarity voltage limiters; dual pulse inverters. Parameters optimized for switch-mode power supply protection.
Clamping Voltage Onset 172 volts nominal; 2 volts above peak line voltage (auto-tracking).
EMI/RFI Filter Response (bi-directional, wave tracking): With 50 ohm Rg load: 3db at 5kHz; 26dB at 100kHz; 38dB at 300kHz.
Let-Through Slew Rate 5,000 volt/µs disturbance reduced to 28v/µs within AC power wave envelope, and less than 10v/µs outside the power wave envelope.
Maximum Applied Surge Pulse Joule Rating Unlimited rating (due to surge current limiting) (8x20µs).
Maximum Applied Surge Pulse Voltage 6,000 volts (1.2 x 50µs) (Industry Standard rating).
Maximum Applied Surge Pulse Current >100,000 amperes (unlimited due to current limiting) (8 x 20µs).
Endurance, C62.41-1991 (formerly IEEE 587) Category B3 (C1) pulses 2kv>100,000; 4kv>10,000; 6kv>1,000 (NRTL verified).
Dimensions 3.9" H x 8.3" W x 4.0" D
Weight 5.25 lbs.
As you can see, the incoming Joules rating is unlimited and it can take a 100,000 amp current pulse and it clamps a 5000V per microsecond pulse to 28V per microsecond.
A Brickwall is a serious piece of equipment not just a Home Depot glorified power bar.
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Check out the Brickwall conditioners/limiters. They are outstanding, The 8 outlet home theater unit is about 250$. I have been using a Brickwall for my home recording studio and never had any problems for over ten years now.
Recommendations for a 50-55" TV
in Home Theater
Posted
Recently got a 55in Samsung curved HU9000, awesome tv that is great for everyday viewing and movies. You need to tweek the settings a bit since out-of-the-box they are a bit too contrasty and saturated. Highly recommended.