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Car Forum / Driving, Maintenance, Tuning / Car Audio / April 2004What Gauge Power Cable Do I Need for...
I have a Pioneer GM-X924 and I haven't used this thing in four years. I can't remember what fuses it has, but some 3rd party sites claim it has two 60A fuses in it!!! That sounds pretty doggone high to me! Or is that just normal for a Class A amp? Pioneer's site has no info on the fuses and mine is packed away until summertime. But anyways, whatever the fuses are rated at, and I'll just assume 60A here... is there some gauge:fuse 'rule' to go by? Also, I just noticed Pioneer's site says the amp has 2 RCA Outputs (Pass- Thru)...what are they for? I assume they continue sending passive signal through the amp...what good is that for? >I have a Pioneer GM-X924 and I haven't used this thing in four years. I >can't remember what fuses it has, but some 3rd party sites claim it has two [quoted text clipped - 8 lines] >Thru)...what are they for? I assume they continue sending passive signal >through the amp...what good is that for? Yes, the RCA output are for sending a line-level output on to other amp(s). This might be useful if you just wanted to power your component speakers with the X924 and wanted to use another amplifier for the subs. For a 260-watt class "A" amp, two 60-A fuses sound about right, especially since the amp is 1-ohm stable. Class "A" amps have very low efficiency numbers, so they tend to draw a lot of current to make significant power. You should be fine with 4-gauge wire to the amp. In short lengths, the rule of thumb for 4-gauge is that it's good up to 135-150 amperes of current. Scott Gardner > Yes, the RCA output are for sending a line-level output on to other > amp(s). This might be useful if you just wanted to power your [quoted text clipped - 9 lines] > the rule of thumb for 4-gauge is that it's good up to 135-150 amperes > of current. Why on earth would someone use a class A in a car?? >> Yes, the RCA output are for sending a line-level output on to other >> amp(s). This might be useful if you just wanted to power your [quoted text clipped - 11 lines] > >Why on earth would someone use a class A in a car?? Beats me - if someone can hear the difference between a good class A amp and a good class AB amp, the difference is going to be lost inside a car, anyway. >> Yes, the RCA output are for sending a line-level output on to other >> amp(s). This might be useful if you just wanted to power your [quoted text clipped - 11 lines] > > Why on earth would someone use a class A in a car?? Because it's the only Amp I have, pal. BTW, thanks for responding with an appropriate reply. > > Why on earth would someone use a class A in a car?? > > Because it's the only Amp I have, pal. > BTW, thanks for responding with an appropriate reply. Scott already responded with a sufficient reply. I was more curious about why someone would buy one of those for car use. As it is, they're already questionable for home use. their heater is busted? FHLH > Why on earth would someone use a class A in a car?? "Scott Gardner" <gardners14@cox.net> wrote in message > You should be fine with 4-gauge wire to the amp. In short lengths, > the rule of thumb for 4-gauge is that it's good up to 135-150 amperes > of current. I have found that 4 gauge is rated for 135 amps in open air. So being underneath a car hood and shoved through grommets then ran underneath carpet the wire would no longer be able to dissipate the heat. I have typically used 100 amp max as my rule of thumb for 4 gauge in a car. 2 gauge is not that much larger or more expensive in my opinion. Les >"Scott Gardner" <gardners14@cox.net> wrote in message > You should be fine >with 4-gauge wire to the amp. In short lengths, [quoted text clipped - 8 lines] > >Les I think that the amount of time you'd actually be sending 135 amps through the wire would be very small, but it never hurts to use larger wire, and you're right - 2-gauge or even 1/0 isn't that much more expensive. Scott "Scott Gardner" <gardners14@cox.net> wrote in message > > > I think that the amount of time you'd actually be sending 135 amps > through the wire would be very small, Very true, but since I do alot of electrical work, both in car and buildings, I have to caution myself against justifying using underrated wire even though I know it can easily handle it in situations that it is likely to see. Like this situation I would be almost positive that it could handle the load, but must resist the urge to use it. but it never hurts to use larger > wire, and you're right - 2-gauge or even 1/0 isn't that much more > expensive. Ya to me it just makes sense to get the appropriate sized wire. But if you cannot, or don't want too, as long as the wire is properly fused it doesn't really matter. Les > "Scott Gardner" <gardners14@cox.net> wrote in message > > >> > [quoted text clipped - 17 lines] > > Les Let's assume I get a 4gauge...if I wanted to add a sub later, should I run a 2 or 1/0 first and split it off in a distribution block later whenever I do get the sub? Not to come off as an a.s, but I doubt that it's class A amp, especially at those wattages and 1 Ohm load. You realize that normally it will cost you about $10 to $50 a watt for some true class A amps, and they usally only put out around 5 to 25. The class A circuitry they boast is for the low-level side (Pre-amp) side of the amp.  Signature1991 Tornado Red Corrado, CCA Member # 6645 Stereo is a continuous W.I.P. There are two parts to wisdom: 1) Having a lot to say, and 2) Not saying it. > I have a Pioneer GM-X924 and I haven't used this thing in four years. I > can't remember what fuses it has, but some 3rd party sites claim it has two [quoted text clipped - 8 lines] > Thru)...what are they for? I assume they continue sending passive signal > through the amp...what good is that for? Use four gauge if you are running from the battery to the trunk. Remember that "power" also includes ground, and that should also be four gauge. Don't forget to insert an in-line fuse six to eight inches from the battery. P. > I have a Pioneer GM-X924 and I haven't used this thing in four years. I > can't remember what fuses it has, but some 3rd party sites claim it has two [quoted text clipped - 8 lines] > Thru)...what are they for? I assume they continue sending passive signal > through the amp...what good is that for? |
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