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Topic Review (Newest First)
12-04-2012 12:42 PM
Besbro It's a Arc Audio FD 2100 2 channel, 95 watts RMS @ 2 ohms.
12-04-2012 12:14 PM
Kipp it's hit or miss sometimes with that. when i was running a shop; anything over 50w we ran new wires. i def wouldn't do more than 100w through the stock wires and even then it could be pushing it. what amp are you running and is the amp 95rms at 2 ohm or 4?
12-04-2012 12:00 PM
Besbro Clear as day, I love the multiplication analogy, that makes total sense! The reason for all these questions is I installed my amp (95 watts rms per channel) and components (ID CXS 6.5 2 ohm version) last weekend and failed at running nes speaker wire into the doors. I spliced into the factory wiring and have approx 4 feet of factory wire active on both sides. I am paranoid about it. I played it at a moderately high volume for an hour and then checked the stock wire, it was totally cool to touch, not warm at all so I am guessing it will be ok. Still paranoid though. I know a few other forum members have done this successfully. The comps sound awesome by the way!!!
12-04-2012 11:52 AM
Kipp more or less, yes. the headunit and amp (if applicable) are capable of multiplying the input power level to a certain point. the issue here is that the input source (the cd) has a weaker input signal. the amp is still multiplying that up to a higher level, but isn't as high as what a stronger source would be. think of your multiplication tables. (random numbers btw) 2 x 12 = 24 vs 3 x 12 = 36. the amp is the constsant and the cd is the variable that changes the output.
12-04-2012 11:28 AM
Besbro So to summarize, the louder the music coming out of the speaker, the more power running thru the speaker wire, regardless of the volume knob.

Thanks!
12-04-2012 11:03 AM
Elizabeth The reply about the power and volume is wrong.
The volume controls the signal going to the amp. the amp will always increase the (volmue controlled variable) incoming signal by the same amount. The power put out from the amp is directly related to the power of the signal coming into the amp.
So, in effect, the volume control 'controls' the amount of power being put out by the amp at any time.(dependent on the level of signal into the volume control too)
Only a class "A" amplifier would be running at full tilt no matter what.
Car amps are NOT class "A" amps.
So the amplifier is always outputting the power corresponding to the signal input, as controlled by the volume knob.
I hope this is totally as confusing as it seems...

Added: and yeah, a lot of old CDs do not have nearly as much compression. Compression is squeezing the dynamic range, so the soft parts are way louder, and the loud parts well, just stay loud. Also many older CDs were not made with the volume as high as possible. They used to believe in dynamic range. No so anymore. Now it is all about being a loud as possible at all times..
12-04-2012 09:12 AM
freemind ^Encoding.

The Killers CD Hot Fuss is a fine example of compression while, The Kings Of Leon's Only By The Night is an example of a nicely recorded CD.

This is why I still have the same copy of Enya's Watermark that I bought in 1989.
It is very dynamic.
12-03-2012 10:58 PM
blackraven456 Depending on how old the CD is, this is easily explained. Originally when they were introduced CD was considered an audiophile medium and thus the mixes of the tracks put on them contained a higher dynamic range. Today's CD's are often over compressed and thus sound louder at lower volumes. It's the same trick TV stations use when loud commercials come on over a quieter show.
12-03-2012 10:09 PM
Besbro So if my volume is at 15 on my hu and the output level on my soem4 (loc) is at max the power running thru my speaker wire is the same as when I turn the output level on the loc to low and leave the hu volume at 15? With the loc output on low the music is much quieter...
12-03-2012 07:09 PM
Besbro No, not burnt. Just old...
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