Low Impedance Spring Reverb Driver

[nordine]

Hello!

I just got an accutronics 4AB3C1B spring reverb tank (8ohm in), and need a good driver circuit to get the most out of it. Ive tried some opamp designs from the internet, but it just doesnt drive enough the springs, im guessing im gonna need a proper power amp driving stage. LM386 is too noisy/distorts, how about a TDA2003? I dont have an audio transformer to match the impedance of the spring tank input, so ill have to go active way.

[GGBB]

There are a number of options on the Accutronics site : http://www.accutronicsreverb.com/main/?skin=sub05_08.html.

[amptramp]

If you want a good low-impedance unity gain driver to act as a current booster for an op amp, try the LH0002 buffer designed by National.
:
http://elcodis.com/parts/1342966/LH0002CH.html#datasheet

There is enough information here to build one from discrete components as long as you use a common heatsink.  Want to do some pioneering?  Replace the transistors with LM317 for the NPN and LM337 for the PNP transistors.  Since they are internally temperature compensated, they may not need a common heatsink (or at the levels you want to use, any heatsink at all).

[PRR]

LM386 should be ample output without excess hiss.

What are you doing to it?