Photo of Amplifer, PCB View to comment

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=87919
Printed Date: May 13, 2025 at 5:21 AM

Topic: Photo of Amplifer, PCB View to comment

Posted By: osix
Subject: Photo of Amplifer, PCB View to comment
Date Posted: December 28, 2006 at 9:05 AM

Here is SOme AMP PCB photo ..

can some Pro out there tell me Which one is GOOD . and Which one is Crap .

and also WHY .. and which one would you get .. and which one wold you Stay away .

Thanks
NO.1
posted_image

NO.2

NO.3

NO.4

NO.5

NO.6

NO.7

NO.8

NO.9

NO.10

NO.11

Thanks kindly Advice .
I am considering NO. 1 , 2 , 3 . 5 , 10
posted_image

Replies:

Posted By: KarTuneMan
Date Posted: December 28, 2006 at 9:16 AM

I would not purchase any amplifier based strictly on what the "guts" look like.... They are ALL awfully pretty.... posted_image

# 6 is a bad boy lookin unit......

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Posted By: boulderguy
Date Posted: December 28, 2006 at 10:51 AM

This sounds like some sort of trick question. Maybe better to post at an EE forum.

Amp design is one thing but quality of components is just as important, which we can't tell from these photos. And ultimately it boils down to what you're trying to achieve.

One of my favorite classic amps, possibly the best sound I've ever had from a 50x2. super simple layout. Anyone recognize it?

posted_image

Posted By: haemphyst
Date Posted: December 28, 2006 at 10:58 AM

Couldn't tell you the model... Perhaps a ClassA 100? It's quite a bit larger than my old ClassA 50's, but looks VERY similar. Soundstream... the OLD SCHOOL stuff, when Soundstream MEANT something!

The old Soundstream sounded so good, because of the minimalist approaches always used. Note how FEW components are in the signal path, between the inout and the gain stage... That minimalist stuff has all gone away, today...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: boulderguy
Date Posted: December 28, 2006 at 10:59 AM

Damn, good eye! Class A 100ii. Currently collecting dust in the basement with some other relics.

Posted By: haemphyst
Date Posted: December 28, 2006 at 11:04 AM

WHY??? Wanna sell it?

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: boulderguy
Date Posted: December 28, 2006 at 11:05 AM

As long as I'm avoiding work let's try another, see if you get it.

posted_image

(the heatsink shape & molex should be a big hint)

Posted By: boulderguy
Date Posted: December 28, 2006 at 11:09 AM

haemphyst wrote:

WHY??? Wanna sell it?

As soon as I did I'd want it back. Even if it's just to occasionally hold it & pet it lovingly.

I don't know. If you're building an entire O/S SS system complete with tape deck or something let me know. I could probably be talked into it.

Posted By: osix
Date Posted: December 28, 2006 at 11:39 AM

Hello Guys ??/Focus focus whahhahahhaa

- I really need some serious advice here .

can anyone tell . if the parts on the PCb is good or crap .

or which one is a Powerful one .

i seriously need some serious advice .

as i am ordering it soon .. and this is the only Data i got ..

Posted By: haemphyst
Date Posted: December 28, 2006 at 11:52 AM

Linear power? Possibly a 2502?

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: boulderguy
Date Posted: December 28, 2006 at 11:58 AM

Yup. Not sure the model tho. I'm having so much fun with this I'm going to post a "name this amp" thread.

Focus now. No way to tell you anything definitive from the photos, sorry guy. What kind of amp sale is this where you have to buy based on guts photos? Model numbers? Specs? Are you buying from a pawn shop?

Posted By: haemphyst
Date Posted: December 28, 2006 at 4:26 PM

Going with the advice of boulderguy, I'd also NEVER buy an amp, just because you can see a picture of the guts. I'd echo his question: What kind of sale is this? Did the seller give you ANY kind of specifications? As noted on the previous page, the Soundstream stuff would never sell me, looking at the interior... the puny power transformer, the tiny amount of filtering capacitor, the little 5A fuses on the rails. Looking at the Linear Power amp: the wired point-to-point connections, the TO-3 case devices (usually slower than TO-220 case devices - unless very expensive), another relatively small transformer.

But LISTENING... Now there is a completely different story. The Soundstream ClassA amps sounded like almost NO OTHER AMP I HAVE EVER OWNED. (With the exception of the OLD Nakmichi PA160 monoblock amplifiers (I had 2 of those...))

The Linear Power amplifiers were absolute POWERHOUSES. The money spent on them was money ahead. Some of the best bass I ever installed. LOTS of current, for control, decent damping factor, way underrated.

All I am saying is this: You can't tell. They may be laid out pretty, (and most of those are, to be sure) but the components chosen by the manufacturer to go INTO the appliance have FAR more to do with the capacity, quality, and capability of ANY electronic device.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."