About AMP9, TAA4100A based 4-channel board amplifers
The AI power up instructions make no mention of this, but powering up an AMP9-Basic with the unmute jumper in place defeats the output DC offset null...
Done tests now: First I left it idle, unmuted (no input) at 30V overnight. No problem. Then for the real test: My voltage adjustable PS can...
I have asked Jan to place this in the AI for all beginning solder junkies: "Notes to soldering the SMD diodes. 1 Solder the diodes first of all...
Hi, I have made the smallest AMP9 build I have made so far. It includes two stereo Alps pots, two Neutrik audio transformers, 6db/oct 100hz highpass...
I have made a temporary setup with an Amp9 while the Truepath is being built - some music is better than none! I have bi-ampable Technics speakers -...
Hello all! I'm a new here and to DIY amps in general. I've searched through the forums, and have read what seems like every post, but I haven't...
Hey there, Dunno if sb else ask'd this yet. (couldn't find any post) I need 4 amp9b for a nice groundplane CBT-array. Any date when they'll be...
Does this amplifier require a metal chassis because it emits EMI? The assembly instructions say yes... But the assembly instructions also...
The outputs of the amps all have an inductor in the output fileter. Fast switching and inductive load can cause the output voltage from swinging...
Have you got a circuit in mind.
Just a quick question, whats the best way to measure DC offset? I tested my A9B quickly with a meter when running with the 500mA fuse, and got...
I just built my third AMP9, but this time all I'm able to get is a faint, rhythmic tick from the output. I have the +5V (4.99V to be exact) at...
Hey folks -- I'm new here, just put together my first AMP9-Basic. Had a lot of fun doing it, and everything seems to be working well right off the...
I used an 8A Polyfuse to replace the AMP9-Basic schottky protection diodes:
http://minirig.org.au/2008/05/28/minirig-41hzcom-amp9-basic/ The first amp9-basic I made around 2 years ago has developed a problem, a dead...
Got my AMP9 up and running fine except for an annoying thump on turning off. The overload LED was not working either but I was not concerned about...
I'm building out a home audio system based on airport expresses and relatively cheap in-ceiling speakers (monoprice). The missing piece is an...
Hi there. I just read in an old thread that: "Alternately you could use 2 - 12V SLA batteries in series, but you would have to limit the...
What's up guys! Long time no see. :) So I'm back with the same agenda but at a more intelligent mindset to achieve the goal. :p I'm building...
Hi there, I bought myself a nice AMP9-BASIC. So far it looks promising, quickly delivered within 2 days from Sweden to the Netherlands. Only the...
Hi! I'm currently designing a PLLXO (Passive Line-Level Crossover) for the amp9-basic, based on the information and formulas here:...
I do appreciate that it takes a lot of time and work to completely destroy a perfectly serviceable forum so I'm not surprised to find the page in...
before I forget, this is probably the wrong forum but it will live well here it's what I have fanatsized over for a good amount of time, ever since...
I wired an AMP9-BASIC inside of a Scion T1809 head unit in my RAV4. Here's a little picture guide. When I tore open the OEM Scion head unit I...
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