Posts Tagged: amplifier

Subwoofer & Amplifier Maintenance Tip

Subwoofer & Amplifier Maintenance Tip

I see a common problem with amplifiers that are older that cause some of them to perform dramatically worse than new.  The issue is that the knobs and switches that are associated with the low voltage (preamplifier) side of the amplifier can corrode internally.  I have seen this problem with JL Audio subwoofers, M&K subwoofers, Parasound amplifiers and… Read more

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Emotiva UMC-1 7.1 Channel Preamplifier/Processor Review

I recently had a chance to work on an Emotiva UMC-1 coupled with Emotiva XPA-5 and XPA-2 power amplifiers.  This combination is an amazing value.  The UMC-1 processor lists for $699 and has features competitive with units many times its price.  The XPA-5 lists for $799 with 200 watts per channel capacity and the XPA-2… Read more

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Matching Preamplifiers and Amplifiers

When you purchase a preamplifier from a different manufacturer than the amplifier you need to be sure they are compatible.  The amplifier will need a certain number of volts to drive it to full current.  The preamplifier needs to supply that level of voltage for the amplifier to deliver its power rating.  This specification is frequently found at… Read more