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also check related resistors for open circuit. after removing, confirm that these are shorted, probably are. otherwise you may reach inaccurate readings. So we recommend new transistors, but NOT because of the 20 ohm readings.you can't check the transistors until you remove them from the circuit completely. If you are playing light dance music, the amplifiers 4-ohm power should be 1.6 x 100 W or 160 W continuous per channel. and by categories like floorstanding speakers, integrated amplifiers, speaker systems, turntables and more. Suppose the impedance of your speaker is 4 ohms, and its Continuous Power Handling is 100 W. So we recommend new transistors, but NOT because of the 20 ohm readings. The amplifier power must be rated for the impedance of the loudspeaker (2, 4, 8 or 16 ohms). One beauty of the transformer driven final stage is that rarely does anything else fail. His 20 ohm readings also tell me the fractional ohm ballast resistors are not open. Allied sells all the ex-Moto parts reasonably. Either would work, and since the MJ15003 is the generic, I recommend those. They used several differnt output types in that amp, so those cross the various ones. The current equivalent part is their 70484140 or their 70483100. You could also call the PV 800 number, but you won't find any 6392s there, that part has been obsolete for years. ONE of his xstrs has an EC problem, and it is best to replace the pair, if for no other reason than they would match more closely that two odd parts. You might realize that if you looked at the circuit. That comes darn close to 20 ohms in my book. There is a 15 ohm resistor and the resistance of the winding between the emitter and base of each. Mykey, have you even LOOKED at the schematic? These output transistors are driven by a transformer. The transformer says either DC298 or 70500298 If one does NOT show that 15 ohms, that is also a problem.Īlso GENTLY check all the wires from the small transformer to make sure none have broken off. Thde two pins themselves will have about 15 ohms between them unless you remove the transistor from the circuit. You might get a resistance that starts low and then charges up to a higher value. You should not find a low resistance there. Check resistance between that casing of the power transistors, and either of those pins. Those parts have their metal case, and two pins sticking out the bottom. They will be mounted to the heat sink - the large piece of metal - or possible right on the rear panel under black plastic cowboy hat shaped things. There are two output transistors, they are the large metal type with a mounting flange and a screw through both ends.
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The output transistors are the only ones that can do that because of the drive transformer That 430 transitor will not make DC on the speaker leads. The other transistor types aer printed on the drawing next to each part. Using unique and revolutionary advanced bass enhancement processes, the IPR2 DSP amplifiers dramatically improve the perceived level of bass in any system, using a fraction of the power that would be required with any other power amplifier.Look closer, it says "all transistors SPS953 UNLESS (OTHERWISE) NOTED." The little preamp transistors are 953s. The DSP was designed to be incredibly effective, yet extremely easy to use. The IPR2's high-efficiency design allows the amplifier to operate at very low temperatures, and does not require massive heat sinks to cool.Īs the name implies, the IPR2™ 50 DSP all include advanced digital signal processing.
#Peavey power amplifier drivers#
DDT protects drivers and ensures that sonic integrity is maintained, even in extreme overload conditions. The DDT™ (Distortion Detection Technique) circuitry ensures trouble-free operation into loads as low as 2 ohms. Advanced technology and extensive protection circuitry allow operation with greater efficiency into difficult loads and power conditions.
#Peavey power amplifier series#
The groundbreaking IPR2 series utilizes an advanced. This revolutionary amplifier offers the sonic superiority and unsurpassed reliability for which Peavey is famous, in an extremely efficient and lightweight design. Peaveys IPR2 power amplifiers, designed for years of reliable, flawless operation under rigorous use. IPR2 Series amplifiers are designed with a resonant switch-mode power supply and a high-speed class D topology that yields the highest audio resolution and efficiency available. The groundbreaking IPR2 series utilizes an advanced design that allows Peavey engineers to dramatically reduce weight while increasing output power, reliability and thermal efficiency. CS 3000 Power Amplifier Building on the reputation of the world-famous Peavey CS 800, which conquered the power amp market in the 1970s, the CS Series is. IPR2™ power amplifiers, designed for years of reliable, flawless operation under rigorous use.