Samson Servo 600 Stereo Power Amplifier , 600 Watts

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Price: $329.99    

Product Feature

• 300 watts per side at 4 ohms, 600 watts bridged mono at 8 ohms
• 1/4-inch and RCA input connectors, 5-way binding post and 1/4-inch outputs
• Dual Rack space design
• 10-segment, 3-color Level LED meters
• 4-stage power protection circuitry

Product Description

The Servo 600 is ideal for larger applications where added power is needed to drive multiple speaker chains, or larger format speakers. The Servo amplifiers feature large 10-segment 3-color level LED meters and independent channel volume controls. The rear panels include 1/4-inch balanced and RCA input connectors, as well as 5-way binding post and 1/4-inch speaker outputs. 4-stage power protection circuitry that ensures optimal performance and protection of connected components.

Samson Servo 600 Stereo Power Amplifier , 600 Watts Review

First off I consider myself an audiophile. I own 4 of these amps with 3 tri-amping my mains and 1 for surround. I've had these amps for probably 4 years now. These amps sound VERY clean and transparent and have good power. opening the hood reveals almost a completely dual mono design, HUGE torroid for power, nice filter cap section etc.

BUT this amp has a serious design flaw and some other areas of concern. the main design flaw is in the speaker protection circuit, the circuit has a relay that the speaker lines pass through (which is pretty standard) BUT for some reason there is a large 5 to 10 watt resistor in series with the relay which gets EXTREMELY HOT. So hot in fact that over time it unsolders itself from the board! So eventually your speakers will begin cutting out and the protect light will show on the front of the amp. Trying to resolder the resistor is a job and a half. The amp is put together with the power plug soldered through the rear of chassis. I had to dremmel a notch through the rear and slide the wires out, then tear the entire amp down to get to the bad solder joint.
I've had this happen on 2 of these now and I had almost no load on both of them. In fact, the first one to go was the amp on my tweeters which has never even been run high enough to show 1 bar of activity so you know I'm not abusing the amp or running it hot etc.
The other problem with this amp is the pots (volume knobs) on the front of the amp go bad, also causing your speakers to crackle and go out. I will often notice a set of speakers not working and have to flick or turn the volume knob to get sound back.
Also these amps have fans that are either on or off, they're not variable despite the specs making it sound that way, so the amp will wait until it gets good and hot, then fire up the fans at full speed and make all kinds of racket. To make matters worse, I have 2 amps that randomly fire up their fans for no reason at all. My midrange amp always statys stone cold but the fans will randomly turn on anyway. I've even taken the top off the amp and waited for the fans to kick in and felt the heat sinks and they're completely cold.
I'm going to try my luck on a Behringer A500 as my replacement as these go out. I will not be buying anymore Samson servo amps.

Edit - its now about 3 weeks later from the above review and a 3rd out of the 4 I own is beginning to go. the amp works but occasionally has an enormous POP that comes out of the right channel, sometimes it cracks and pops. as a test I disconnected the input so its just the amp and speaker (and good source of power of course) and still the occasional pops continue. They are SO loud, I'm AMAZED that my poor little 4" mid that this amp drives didn't blow completely out.
Meanwhile I've replaced one of the samsons with an A500 and so far am very impressed. it wont be long now until all the servo 600s are gone and all new A500s are in!
the servo 600s were fun while it lasted I guess...
while the last one is still working I think I'll do some power/distortion tests on the samson vs behringer and post them here.

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