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In Reply to: RE: metrics of amplifier quality/value? posted by zdog on August 31, 2014 at 08:06:49
There is no technical, published spec for manufacturer reputation, but do your legwork. Don't buy some exotic, ultra tweaked amplifier from a company that might not be in business in 5 years or less. Stick with major companies with a reputation for quality and durability. Amplifiers certainly do sound different, but a novice has a lot more to worry about. A super duper amplifier that blows up and cannot be easily repaired sounds pretty crappy.
Age affects solid state electronics. Power supply capacitors fail eventually, even in the very best equipment. You are rolling the dice on equipment that is more than 10 years old. Mechanical items such as switches also fail. Every internal component is subject to failure, and some transistors can no longer be obtained for repair.
Look for good heat management (big heatsinks) and plenty of venting. A big (heavier) transformer and power supply caps will typically outlast smaller, marginally applied components. Every time power is cycled on/off, the life span is shortened.
Of all the components in a stereo, the amp probably affects the sound the least. This is an asylum. People here go on about amps and will gladly make you crazy, too. Buy an amp in your budget range that has the basic features you need. Start listening; don't obsess over whether it's the best amp in the world.
Personally, I never cared much for Rotel sound, or any Class D amps. Investigate the newer generation of chip amps, also called gainclones. Some major manufacturers now employ these, and they produce superb sound with minimal fussy circuitry and are incredibly reliable. If you care to learn about it, there are simple kits available that can give you excellent value.
Peace,
Tom E
Follow Ups:
All of the above is good advice. Another brand I wouod consider rather strongly is NAD - a lot of component for the money. I suggest looking on Audiogon (if there is no dealer near you so that you cant audition used equipment and hear for yourself -always and unarguably the best arbiter).
I went Parasound on a recent upgrade cycle. I had become disillusioned with my 'd' integrated using ICE modules.
I think Parasound is a REAL sweet spot and great value. The Newish P5 preamp is quite full-featured and the PAIR of A23 biamping my panels has more than enough headroom to more than take the place of the previous 500x2 'd' amp.
I'd be careful buying used NAD. For a few years there, problems existed and reliability suffered as a result.
I had a NAD 1700 tuner / preamp from the mid '80s which was 100% and made prior to the 'problems' of the mid 90s, if that's when it was!
As for a 10 year 'be careful' time for used equipment? I'd be more worried about something which has SAT for that long and would PAY a tech to ramp it up using a Variac before committing to full line voltage.
I'd figure caps in-use should go 20 years before even be THINKING of replacement, and than not without reason. When replacing caps? Go for 105c rated and AT LEAST the same voltage, if not slightly higher.
Too much is never enough
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