Home |
Search |
Today's Posts |
#1
Posted to rec.audio.high-end
|
|||
|
|||
Sumo Polaris III Power Amp( Need Advice)
Does anyone have any comments on the Sumo Polaris III Power Amp?
What would be a right price for one that is rated a 9/10 in function and form? I am considering buying one but can't seem to find any info on it on the web. If anyone has any comments or advice, I will appreciate it. Thank you Winston |
#2
Posted to rec.audio.high-end
|
|||
|
|||
Sumo Polaris III Power Amp( Need Advice)
Winston wrote:
Does anyone have any comments on the Sumo Polaris III Power Amp? What would be a right price for one that is rated a 9/10 in function and form? I am considering buying one but can't seem to find any info on it on the web. If anyone has any comments or advice, I will appreciate it. Thank you Winston I own the Sumo Polaris II which I believe is very similar in design, sound quality and specs (to the III). The Polaris is a wonderful amp, with a warm but detailed and open sound and excellent soundstage and imaging. They have a tube-like warmth and bloom once run in. I was running my Walsh 5's with the Polaris II - the sound was superb but the Walsh's needed more power than 100W. I have since ungraded to the Polaris's big sister, the Sumo Andromeda II, a beast of an amp (240W in 8 ohms; 400W in 4 ohms). This really opened up the sound magnificently, and the Walsh's really sing now. These are Mosfet output stages, for what is it worth. The Sumos are reputed to drive low impedance and difficult loads with aplomb. My experience supports that opinion. Grab the Polaris III for $400 if it is functional. If it is not, then I would expect a substantial discount on the price, because these amps utilize complex proprietary balanced circuits and service manuals are not available. If any of the output or driver stage semiconductors are damaged, you may not be able to replace them as they have likely been discontinued, assuming you could find a tech willing to service the amp! |
#3
Posted to rec.audio.high-end
|
|||
|
|||
Thank you Skakamonas
Thanks for the input. I am glad to ear the pros about the Polaris III.
I managed to secure the deal for an excellent piece for $300.00 and I am going to be using it to drive a pair of 4ohm Jamo speakers. Once again my appreciation to you. Winston "skakamonas" wrote in message ... Winston wrote: Does anyone have any comments on the Sumo Polaris III Power Amp? What would be a right price for one that is rated a 9/10 in function and form? I am considering buying one but can't seem to find any info on it on the web. If anyone has any comments or advice, I will appreciate it. Thank you Winston I own the Sumo Polaris II which I believe is very similar in design, sound quality and specs (to the III). The Polaris is a wonderful amp, with a warm but detailed and open sound and excellent soundstage and imaging. They have a tube-like warmth and bloom once run in. I was running my Walsh 5's with the Polaris II - the sound was superb but the Walsh's needed more power than 100W. I have since ungraded to the Polaris's big sister, the Sumo Andromeda II, a beast of an amp (240W in 8 ohms; 400W in 4 ohms). This really opened up the sound magnificently, and the Walsh's really sing now. These are Mosfet output stages, for what is it worth. The Sumos are reputed to drive low impedance and difficult loads with aplomb. My experience supports that opinion. Grab the Polaris III for $400 if it is functional. If it is not, then I would expect a substantial discount on the price, because these amps utilize complex proprietary balanced circuits and service manuals are not available. If any of the output or driver stage semiconductors are damaged, you may not be able to replace them as they have likely been discontinued, assuming you could find a tech willing to service the amp! |
#4
Posted to rec.audio.high-end
|
|||
|
|||
Sumo Polaris III Power Amp( Need Advice)
SNIP
If any of the output or driver stage semiconductors are damaged, you may not be able to replace them as they have likely been discontinued, assuming you could find a tech willing to service the amp! The output semi's are not that difficult to replace -- they are TO-247 MOSFET's -- Gate, Drain, Source --2SJ115 can be substituted with a 2SJ200, the 2SK405 can be substituted with the 2SK1529. Both are available from ampslab dot com. The circuit uses a servo to reduce DC on the output. |
Reply |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Power Filtration | Audio Opinions | |||
here is how firewire ports fail | Pro Audio | |||
List of NOS mostly tubes | Vacuum Tubes | |||
rec.audio.car FAQ (Part 2/5) | Car Audio | |||
FS: SOUNDSTREAM CLOSEOUTS AND MORE!! | Car Audio |