this here is a soundstream rubicon302... i got this for the special ultra low price on $0.00usd. im a very proud owner...
yes i know the pic is poopy... i need a better digi cam...
An externally hosted image should be here but it was not working when we last tested it.
yes i know the pic is poopy... i need a better digi cam...
3 more amps I got the other day.....
Soundstream Class A 100 II:
Soundstream Reference 405 (5 channel):
Phoenix Gold MAC200 (Audiophile version of MS275?):
Soundstream Class A 100 II:
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Soundstream Reference 405 (5 channel):
An externally hosted image should be here but it was not working when we last tested it.
Phoenix Gold MAC200 (Audiophile version of MS275?):
An externally hosted image should be here but it was not working when we last tested it.
maxw said:
i love that amp... i almost got the 705s when they had them at fry's electronics (outpost.com) were i live... but i had this silly little thing called rent to pay... life stinks...
what do you do with all of these amps anyway? if i may ask?
sid216 said:
The 705 is very nice!
I buy and sell car audio equipment just out of interest and keep somethings for my self, or just play with new stuff then on sell it. I think I will sell the ref 405 soon as I prefer to have a separate amp for subs 😉
here is my new acquisition...
on the right top is 2 irfz44n nexfet power mosfets http://kitsrus.com/pdf/irfz44n.pdf (pdf)
on the bottem right and left is 1each 2sd778 pnp and 1 each 2sd998 npn
http://www.bg-electronics.de/catalog/product_info.php?products_id=28
http://www.bg-electronics.de/catalo...ge=en&osCsid=9d5a74ed896883189d80603dd7241158
the top left i can not id, the writing on them is very poor. but i paid $40usd for it and sofar for it sounds pretty good... its no old school ppi but ehh.
i also figure it puts out about 50watts of alright power...
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
on the right top is 2 irfz44n nexfet power mosfets http://kitsrus.com/pdf/irfz44n.pdf (pdf)
on the bottem right and left is 1each 2sd778 pnp and 1 each 2sd998 npn
http://www.bg-electronics.de/catalog/product_info.php?products_id=28
http://www.bg-electronics.de/catalo...ge=en&osCsid=9d5a74ed896883189d80603dd7241158
the top left i can not id, the writing on them is very poor. but i paid $40usd for it and sofar for it sounds pretty good... its no old school ppi but ehh.
i also figure it puts out about 50watts of alright power...
I recently opened up my other amp (others posted earlier in this thread), here are a few pics:
http://www.resnet.trinity.edu/areynol1/audio/zrs8_01.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_04.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_05.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_12.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_11.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_06.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_07.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_09.jpg
That heatsink in the middle is huge, it easily accounts for most of the amp's weight. Barely gets luke warm to the touch when running at 1ohm. It's rated at 1500x1 @ 1ohm, and I have no doubt that it can do it.
http://www.resnet.trinity.edu/areynol1/audio/zrs8_01.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_04.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_05.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_12.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_11.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_06.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_07.jpg
http://www.resnet.trinity.edu/areynol1/audio/zrs8_09.jpg
That heatsink in the middle is huge, it easily accounts for most of the amp's weight. Barely gets luke warm to the touch when running at 1ohm. It's rated at 1500x1 @ 1ohm, and I have no doubt that it can do it.
sr20dem0n said:
Interesting design works well I would think. The power devices are all T0220? I guess the heat sink in the center would isolate the amp from the power supply also. The extra torroid(s) confuse me(under the fan) the 2 upper ones part of the power supply.
The lower one/caps by the connections I guess is some part of a regulated supply?
smaller ones on yellow torroids are part of filtering I think.
Forgot to mention what amp it was, in case no one picked it up from the logo on the heatsink and the pictures' filenames, it's a Cadence ZRS-8.
I didn't have a chance to see what type of output transistors were being used. Those black clips were on there very tight and I didn't feel comfortable brute forcing them off just to see what transistors were sitting underneath. I'm not sure about the torroids, I don't have much experience in amplifier design so your guess is as good as (read: better than) mine. It does have a regulated power supply though, so you might be right.
I didn't have a chance to see what type of output transistors were being used. Those black clips were on there very tight and I didn't feel comfortable brute forcing them off just to see what transistors were sitting underneath. I'm not sure about the torroids, I don't have much experience in amplifier design so your guess is as good as (read: better than) mine. It does have a regulated power supply though, so you might be right.
Now that you guys mentioned the extra torroids, what are the ones to the left for? This amp is unregulated and those suckers get hot!
An externally hosted image should be here but it was not working when we last tested it.
Those are actually DC inductors which perform the function of filtering the HF content native to a switching type amplifier, namely the Class D.
Without those inductors, ~130V of 100kHz (pk-pk) hash would go into your woofers and throughout your speaker wires, causing havoc with yours and the neighborhood's radio reception.
The fan is an excellent addition - Cadence had problems with their inductors getting so hot that they unsoldered themselves from the board, initiating a shutdown.
Without those inductors, ~130V of 100kHz (pk-pk) hash would go into your woofers and throughout your speaker wires, causing havoc with yours and the neighborhood's radio reception.
The fan is an excellent addition - Cadence had problems with their inductors getting so hot that they unsoldered themselves from the board, initiating a shutdown.
Ya, with the PG 1200, the whole bottom is a heatsink, I was so impressed by it ability to stay cool, even running @ 1ohm. Polo..🙂
EnvisionAudio said:
so there just in series with each supply rail and act like a lowpass crossover? Lot of wire but I dont know as much about this class D but makes sense. Just thought the voltage drop would be too signifigant (Re of coils ect) for it to be effective.
No, they're in a configuration with two capacitors to form a second order L-C filter in series with the speaker output connection.
Like this:
An externally hosted image should be here but it was not working when we last tested it.
Courtesy Maxim Integrated Products, Inc.
that visonik amp pics i posted... that is the crappiest amp i have ever heard... i think the sparkomatic bass cannon has more impact tham this thing hooked up to anything.
hi maxw, what is differance between these 2 amps? i know the power differances but want to know more! i own several ms275's and ms2125's too!
marko said:
Hey Marko,
I'm not really sure. The AC stands for "audiophile class" and in its specs it has lower distortion and high S/N ratio so I guess maybe it just has better matched components inside or something like higher tolerences. I dont have a regular MS275 to compare it to. I'm gonna sell it now anyway as I have a Digital Designs amp to drive my sub 😉
If the s/n ratio is better and the distortion I would suspect the semiconductors used were of better quality the the standard ones. Like the op amps in the preamp. perhaps the power supply had better filtering/less noise.marko said:
Hi ! I'm french, so I hope you'll excuse my english 
We purpose to me a Phoenix Gold MAC 200, so I don't know this amp and I like to know if it's a good amplifier to plug with a MB Quart PSD 213 component.
I'm looking for quality, both dynamic and clearness.
Is this a good amp for this use ?
Thanks a lot 😉
PS : I've mailed Phoenix Gold to know the difference between a MAC 200 and a MS, that's their answer :
"The amp is a great unit and will function well for almost any moderate power purpose. I do not have a manual for the amplifier that I can provide you but if you look a the dimensions of the unit and compare it to the same size “MS” chassis amp, it is the same unit with a different power supply. The power supply in the “MAC” is optimized for 8 ohms vs. the 4 ohm rating of the “MS” so the 4 ohm rating of the MS amplifiers would be the same for the MAC except at 8 ohms instead."
We purpose to me a Phoenix Gold MAC 200, so I don't know this amp and I like to know if it's a good amplifier to plug with a MB Quart PSD 213 component.
I'm looking for quality, both dynamic and clearness.
Is this a good amp for this use ?
Thanks a lot 😉
PS : I've mailed Phoenix Gold to know the difference between a MAC 200 and a MS, that's their answer :
"The amp is a great unit and will function well for almost any moderate power purpose. I do not have a manual for the amplifier that I can provide you but if you look a the dimensions of the unit and compare it to the same size “MS” chassis amp, it is the same unit with a different power supply. The power supply in the “MAC” is optimized for 8 ohms vs. the 4 ohm rating of the “MS” so the 4 ohm rating of the MS amplifiers would be the same for the MAC except at 8 ohms instead."
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