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Old 27th September 2006, 05:44 AM   #1
Xspunge is offline Xspunge  United States
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Default Amp 6 Basic review (An amp for newbies)

First off a huge thanks to Jan Fredriksson for designing and selling his own line of amps. Obviously without him some of us would be looking at higher priced alternatives. So without further ado here is my review of the prototype board the Amp 6 Basic.

(BTW Check out his site at www.41hz.com if you want to find out about Jan's amps)

I first emailed Jan almost two months ago asking some questions about the regular Amp 6. He emailed me back stating that he was working on a new version of the Amp 6. He asked if I would like to be a tester. Let me think about that for a second... "Hell yeah I would". So I emailed him back saying I would love to be a tester. He said that the new Amp 6 was less complicated, had fewer parts, no on board power supply, and NO TOROID WINDING like the original Amp 6. And unlike his other amps, it came with all the necessary outputs so you could run the amp as soon as you finished building it. It came with speaker terminals/powerblocks, the 3.5mm audio input jack and the 5.5mm ac adapter power jack. You can also solder wires for the the battery input. To me, that was perfect. Jan agreed to send me a prototype board in return for feedback. He wanted to know what types of questions a newbie would have, and what issues a newbie might run into during the fabrication/soldering of the amp. Before he sent the board he sent me several revisions of the instructions, and noted that it will have more pictures so you can see how the board is supposed to come together, and that it will be very comprehensive.

I received the prototype board in the mail after a couple of weeks. While I waited for it, I went over the instructions for both the original Amp 6, and the Amp 6 Basic. He sent me several revisions with changes he made along the way. And so he left me to start building.

I checked to make sure I received all the parts, and I went back over the instructions again. The instructions have lots of pictures so you will be able to see where everything goes before you start to do anything. For the newbies I highly recommend you go over the pics and read the steps before doing anything. The pics are there for a reason so take full advantage of them! I took out all the parts in the first bag and the first section of the instructions. I placed all the caps and the resistors in their corresponding places on the PCB. I didn't solder anything yet. I wanted to make sure I knew where everything went before I started on the path of no return. One can never be too careful when building your own amp, because if you aren't, you will have to consult the troubleshooting guide at the end of the instructions or start asking the forum for help. Anyway, once I knew where everything was supposed to go, I removed everything and started from step 1. I followed the instructions, and I started soldering the parts. Let me also add that the instructions are clear, concise, and well written. For the most part I had no problems with putting the amp together. I also emailed Jan about suggestions about the order in which things should be soldered, and some questions about the resistors.

You do need a multimeter, otherwise it will be hard to determine where you might have an issue and it will be just guesswork. If you are in the US you can get one off Ebay for under $10 with shipping. I paid about $8.79 with shipping for a cheap digital one. Its not the most accurate, but it gets the job done. I did have a problem, which is noted below, and the multimeter helped my to pinpoint where the problem might be.

Anyway, after finishing the amp, I tested it. The fuse didn't blow, and nothing shorted out. So now I hooked up my MP3 player and turned up the volume. I heard music but it sounded very faint, even at full power. It turns out that the soldering I had done on the inductors wasn't making good contact. After resoldering the inductors, the amp worked beautifully. There was no distortion, no nothing, just clear beautiful music coming from the amp. Maybe its me, or maybe I never noticed before, but some music I listened to before I thought I was able to detect notes or background sounds that I hadn't noticed previously. Not quite sure, but I like the way it sounds. I will have to do a back to back comparison with the same music at the same volume with my Sonic T Amp to be absolutely sure, but I do know this. With the Amp6 Basic I can achieve higher volume levels than the Sonic T amp, and that can only be a good thing. Also, I the bass response is better than my pretty much stock T Amp as well. So far there isn't anything I would change on the Amp6 Basic and I prefer it over the Sonic T, and if you have both or are considering an amp from 41Hz, you can't go wrong with this lower priced and easy to build kit.

I can't compare it to the regular Amp 6 because I don't have one, but I do know they use some of the same caps and resistors, and they are based on the same Tripath TA2020 Chip. They differ in the fact that the Basic has added a fuse, removed the power supply, removed the LED, and has ready made inductors and fewer things to solder.

So now that I am finished with the Amp6 Basic kit, I am strongly considering making the jump into the Amp32. Thanks Jan for making a great sounding amp, and for thinking about newbies who might be wary of trying to build their first one, or more experienced builders who want a no-nonsense amp that sounds every bit as good as other models without having to wind inductors or go blind trying to solder surface mount resistors and caps.

So if anyone has any questions about this amp feel free to email me (since I was lucky enough to be one of the first ones to test it)
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Old 27th September 2006, 06:38 PM   #2
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Default Good timing!

Xspunge

Nice review - thank you. I ordered an Amp 6 Basic yesterday, and also an Amp 5 (I'm going to sharpen up my skills on the Amp 6 before I tackle the Amp5).
I received instructions for the regular Amp 6 - do you know if the instructions for the Basic version are available?

Thanks

Woodmancy
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Old 27th September 2006, 08:21 PM   #3
djQUAN is offline djQUAN  Philippines
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I have also ordered amp32 and amp8. still waiting for them to get shipped.......

it is nice to have one of the smallest amps in the world for my mp3 player.

gonna use amp8 for my car system.
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Old 28th September 2006, 03:47 AM   #4
Xspunge is offline Xspunge  United States
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Woodmancy, I think Jan has the instructions up for the 6-Basic. If he hasn't then he is probably working on the final revisions as we speak. The boards and kits aren't scheduled to officially ship until the end of this week at the earliest.

I can email you the version I have. It is missing the pics included in the final, but if you have any problems you can email me. I have pics of my board I can send to anyone that needs them.

PM me or shoot me an email and I'll send it out to you.
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Old 28th September 2006, 07:58 PM   #5
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Default I wish I could

Xspunge

This site will not let me e-mail you because I am new (just a half a dozen posts). If the moderator can help me out of this I will take you up on your offer - Jan shipped my boards yesterday.

Thanks
Woodmancy
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Old 28th September 2006, 09:21 PM   #6
Pano is offline Pano  United States
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Woodmancy - thanks for the report and the heads up on the new AMP6 basic. Looks cool!

But I tell you, I gotta talk to that Jan. After all the AMP6 and AMP3 kits I've bought from him, my tirelss promotion of the AMP6 over the other T-Amps on forums, website and emails - and what do I get? Nothin. Zip, Nought. Do I get to test the new AMP6 basic? Nooooo... Don't even get an email from Jan about it. Phooey!

Must be I'm the Rodney Dangerfield of T-amps. "I get no respect, I tell you, no respect!"
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Old 28th September 2006, 10:11 PM   #7
BWRX is offline BWRX  United States
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Quote:
Originally posted by panomaniac
After all the AMP6 and AMP3 kits I've bought from him, my tirelss promotion of the AMP6 over the other T-Amps on forums, website and emails - and what do I get? Nothin.
I thought the same thing having bought, built, and sold a lot of AMP3s... but I guess we're just too far away from Jan.

Regardless, I went ahead and built my own and moved onto other things

Michael, would you be up for doing a demo of the D10.1s? I definitely prefer them to my AMP3 and would be interested in hearing your opinion of how they compare to the AMP6.
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Old 28th September 2006, 10:24 PM   #8
Pano is offline Pano  United States
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Yeah, I know Brian - I was thinking of you.

You even offered to beta test one of his amps and got turned down! Jan puts together a great set of kits, but you gotta wonder sometimes...

Always glad to hear and test new Class-D amps. Send him on!!
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Old 28th September 2006, 10:55 PM   #9
BWRX is offline BWRX  United States
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I just figured I'd ask Jan, and the worst he could do was turn me down. I cried for a couple days but have fully recovered since

Sounds good to me! I'll build the last two boards this weekend and send them to your tropical destination early next week.

edit: Sorry to slightly hijack your thread Xspunge! I'm finished
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Old 29th September 2006, 12:15 AM   #10
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Default There is a lot of mix up here

Panomaniac - this is Woodmancy

I am not xpunge - he did the review of the Amp 6 Basic - and I'm glad he did. I am just buying my first 41Hz product off the web site.

I am just a relatively newcomer to this site - and I love it.

I pity Jan – I am a retired businessman, and I know the challenges that go with that – give him a tiny break, and maybe pick up the phone to discuss concerns with him – you too, BWRX.

I love this stuff that goes on here, let’s not let it go for whatever reason.

Woodmancy

PS. I would love you to update your page on the Super T. People like us depend on people like you.
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