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FDP Forum / Amp Mods, Repairs, and Projects / Change 4 (2) spring long (16 ¾") reverb tank for 6 (3) spring long (16 &fr



Mar 29th, 2017 01:59 AM   Edit   Profile   Print Topic   Search Topic


Can't find videos on youtube about this subject. I need more and deep reverb on my Twin Amp (Protube Series). Do you have, or know where to find comparison on 4 and 6 spring long reverb tanks?




Mar 29th, 2017 05:50 AM   Edit   Profile   Print Topic   Search Topic

If you mainly use the amp for clean sounds you will have a much larger range of verbs to use with a Reverb stomp box in front of the amp then messing with different verb pans!



Mar 29th, 2017 07:01 AM   Edit   Profile   Print Topic   Search Topic

Hi Steve25,

I mainly use clean sounds with lots of reverbs. But I'm old school, I really want to use the amp's reverb tank :-)

Contributing Member


I like guitars and amps
Mar 29th, 2017 07:59 AM   Edit   Profile   Print Topic   Search Topic

I have found more and better sounds from my Hall of Fame reverb pedal than any of the onboard reverbs. Just my .02 cents



Mar 29th, 2017 11:37 AM   Edit   Profile   Print Topic   Search Topic

Look at the tank that you have.

There should be a manufacturer on it.
In addition, there should be an 8-9 (or whatever) digit part number.
Every number/letter means something about the tank. Input and output impedance, number of springs, decay time, etc.

With this information, you can go to the manufacturers' web site and try to figure out what you'd like to get as a replacement.

You can also search the net and try to find out if the tank that you have is the one that is supposed to be in there.

Also, you can try using the search feature on the forum for more information.



Mar 29th, 2017 02:54 PM   Edit   Profile   Print Topic   Search Topic

I have a 4 spring tank, that it's stock. I want to know how different a 6 spring would be before I buy one.

The search on the forum couldn't get me this information.

Thanks, again.



Mar 30th, 2017 02:16 AM   Edit   Profile   Print Topic   Search Topic

My experience is that reverb tank performance has a high degree of variance, even between individual examples of tanks of the same manufacturer and part #.
So you may just have a bad one in your amp.
Your amp tech may be able to facilitate you trying out a few different tanks in your amp, as they're quick and simple to swap in and out.

6 spring tanks tend to have a thicker, denser reverb signal than those with 4 springs; it may seem counter-intuitive but that can result in the reverb effect being too much if a lot of reverb is wanted.
Hence 'surfy' type reverb fans may tend to prefer 4 spring types.

You may find that the linked page is helpful in selecting a new tank.

External link

(This message was last edited by pdf64 at 04:17 AM, Mar 30th, 2017)



Mar 30th, 2017 02:57 AM   Edit   Profile   Print Topic   Search Topic

Thanks pdf64 :-) I already saw that amplified parts link :-)

I think there is nothing wrong with my tank. Maybe it's the circuit of the amp that it's designed not to have tooooo much reverb. So I'm thinking on try a tank that could have a little more punch. I thought about a 6 spring tank...


Cincinnati, USA

Mar 30th, 2017 07:26 AM   Edit   Profile   Print Topic   Search Topic

I've used 6 spring tanks and like them. Maybe you will too.

Tanks are cheap enough that you can audition a different one without breaking the bank.



Mar 30th, 2017 07:56 AM   Edit   Profile   Print Topic   Search Topic

Yes, amphead4, I agree with you.
However, if all of you could send some video/audio comparing 6 spring with 4 spring tanks, it would make my life easier. Here in europe it's difficult to find tanks of non-Accutronics brand.

FDP Forum / Amp Mods, Repairs, and Projects / Change 4 (2) spring long (16 ¾") reverb tank for 6 (3) spring long (16 &fr

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