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Car Forum / Driving, Maintenance, Tuning / Car Audio / April 2004Power acoustik and sony
Hi there I need a little help here I have a PowerAcoustik HMR 800-4 (800 W) 2 Ohm mosfet amp, also a 500 watt Sony xplod Sub, I have a couple of questions: 1. Is this combination right? (using one channel bridged to give the sub 400w) 2. I also have a little nippon america 50Wx4 (200w) amp for front speakers connected to a 84 ampere car battery using 8 gauge (high-current) awg cable, can I connect the Power Acoustic to the same cable or I have to run another cable from the battery just for the PA? thanks in advance... Having mosfets in a car amp means nothing in terms of it's output. Mosfets are good for the pre-driver stage only. The best output transistors ar bipolar and cost more. All the high end car amps made in the U.S. (Fosgate, Earthquake, Orion, etc.) use bipolar outputs just like the high end home audio amps. The Chinese love to tout Mosfets because they're cheap and durable, but they also change the sound of female vocals! The Sony is a better product. P. > Hi there I need a little help here > I have a PowerAcoustik HMR 800-4 (800 W) 2 Ohm mosfet amp, also a 500 [quoted text clipped - 9 lines] > > thanks in advance... Boy don't we know all about it. Fosgate has been using IRF540 and IRF9540 FET outputs for years. Sony uses the SAME FET's. FYI, As far as high end home audio, the Pioneer Elite recievers, VSX39TX, and most of their other Elite models, also use IRF540/9540 pair as outputs.  SignatureJammy Harbin J & J Electronics, Inc. 227 S. 4th St. Selmer, TN 38375 731-645-3311 > Having mosfets in a car amp means nothing in terms of it's output. Mosfets > are good for the pre-driver stage only. The best output transistors ar [quoted text clipped - 17 lines] > > > > thanks in advance... The Chinese love to tout Mosfets because they're cheap and > durable, but they also change the sound of female vocals! WTF????? It changes the sound of female vocals?!?! Now be a good little best buy salesman and explain how. Les > Having mosfets in a car amp means nothing in terms of it's output. Almost true. MOSFETs have a lower transconductance and tend to have a greater "on" resistance than bipolar types. This means a slightly higher distortion spec and lower output stage efficiency. However the difference in sound quality is undetectable to the ear. > Mosfets are good for the pre-driver stage only. Where did you get that from? >The best output transistors are bipolar and cost more. All the high end car amps made > in the U.S. (Fosgate, Earthquake, Orion, etc.) use bipolar outputs just like the high end home > audio amps. What is your source for this info? > The Chinese love to tout Mosfets because they're cheap and durable, Not cheaper and only a little more durable. >but they also change the sound of female vocals! The Sony is a > better product. P. OK now you're just making things up. Kevin Murray |
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