The Missing element in Chipamps> how to achieve tight kick drum bass with chipamp?

[danielwritesbac]

For a nice kick to the bass, I prefer:

Monoblock / Dual Mono format

At the amplifier board, 220uF or 330uF or 470uF capacitors on power. And, of course 100nf too.
Too big at the amp board = no kick to the bass.
Too small at the amp board = possibility of loud mids or not enough bass; yet, the cure for a mild mids problem is a 2.2uF to 4.7uF 100v cap from V- to V+.

For the power supplies, these: http://www.diyaudio.com/forums/showt...49#post1558349
have been working very well as an upgrade.
The zero-volt line is to be at least 18ga thick for best results.
With an 8 ohm speaker, you could use 1500uF caps in the above design--like whatever model Peter puts in the Audiosector amplifiers.

Hint, with an 8 ohm speaker, you can use a bridged amplifier because bridge + parallel will not result in greater output power (unless the amplifier is over-volted--not a recommend).

A note: Effective motor control isn't exactly measured in watts.

Have fun!

[Nuuk]

A note: Effective motor control isn't exactly measured in watts.

Is that 3 across or 17 down?

[coloradosound]

Are you sure it is the amp that is the problem?
Have you tried other amps while leaving the
speakers in exact same location?
You might not believe the impact that rooms
and speaker placement have on bass!

[coloradosound]

Interesting AP Note from National:
http://www.national.com/an/AN/AN-1485.pdf

Although LM3886 will drive lower imp. I would apply
scale of thinking to amps in the note driving their intended loads.

[danielwritesbac]

Originally posted by Nuuk


Is that 3 across or 17 down?

I've been trying to guess what that means for a bit over an hour. No luck yet.

Hey, but I do have a question for you. . .
With my power supply, it works very noticably better for monobloc / dual-mono (in electronic dampening topic). I'm wondering if that's expected "in general" or if there is something in particular that I can do differently?

[Nuuk]

Dual monoblock supplies should sound better because you are cutting down on cross channel modulation.

I take it you don't do crosswords!

[danielwritesbac]

Originally posted by Nuuk
Dual monoblock supplies should sound better because you are cutting down on cross channel modulation.

I take it you don't do crosswords!

Thanks for the speedy answer!

No crosswords for me. I thought it was like that game where you have to yell "You sunk my battleship!" for some reason.

Oh, back on topic, howabout this:
http://cgi.ebay.com/PSU-Filter-Kit-8...QQcmdZViewItem

I just liked the photo, but, personally, I'd have used a faster cap than that. Funny thing is that it looks exactly like my hand drawn design from earlier, albeit that orientation for a rectifier is kind of goofy for a single-side PCB.

Hey, and don't you have a snubber type supply design? And, have you ever found a close copy of it on Ebay?

[Nuuk]

Daniel, you keep referring to 'your designs' as though you 'designed' them. But all these designs are in the public domain, and changing the value, type, or brand, of a component does not really count as a 'new' design.

Indeed, swapping out a component for one of a different value, type, or brand, is unlikely to change anything about a circuit other than the sonic signature. And that is a personal thing that you may like or dislike. It doesn't make that circuit better or worse for everybody else.

And no, I don't have any designs on Decibel Dungeon, other than those that I have copied from the application sheets, or from somebody far cleverer than I am with electronic design. So the answer is no, I haven't seen anything on Ebay that is my design, just various stuff that is quite clearly based on very common, non-patented designs.

Like you, I am a novice in this game. Unlike you, I don't have any problem with people knowing that, and much less of a problem knowing it myself.

There's a proverb that says something like 'If you want to be a teacher, first learn to become a pupil'

[danielwritesbac]

Originally posted by Nuuk
Daniel, you keep referring to 'your designs' as though you 'designed' them. But all these designs are in the public domain, and changing the value, type, or brand, of a component does not really count as a 'new' design.

I really did make it without seeing one like it beforehand; yet I'd consider that its just too obvious to be unique.

Edit: I wanted better bass and a more level frequency response, made a quick sketch (original was discrete rectifier), picked up the soldering iron, made the thing, plugged it in, and. . . oh how nice! It wasn't a big deal. Later I swapped the diodes for a block rectifier so that others could make it without getting confused by the diodes.

Edit2: eketehe helped with the portion of the power circuit at the amplifier board itself. His centerline spec of 330uF works for most chipamps to increase the resolution to greater than the "gainclone" style. Actually we were both after loud bass, but got fast bass instead, which was even nicer.

In combination, those two things provide one possible answer to the question on this thread.

Like you, I am a novice in this game. Unlike you, I don't have any problem with people knowing that, and much less of a problem knowing it myself. [/B]

Probably sometime soon, you'll see me quite humble, asking for some help with a preamp. My amplifiers could stand to be slightly more euphonic. I have no idea how.