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Post subject: DRRI Power increase
Posted: Tue Jun 22, 2010 9:16 am
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So is it possible to increase the wattage of a drri? Or if that's not possible, is there another way to make it louder?


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Posted: Tue Jun 22, 2010 9:37 am
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You can make it louder by replacing the speaker with one that's more efficient, however, that will change the sound as well. Not sure that's a great trade-off.


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Posted: Tue Jun 22, 2010 9:47 am
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Yes and no. I mean, as stated a more efficient speaker will help.

Also, you could change the tube bias or tubes themselves to run a bit hotter bias. All of these can and will alter the tone.

If there is a line out, you could run it into a power amp with more wattage then to a speaker cab

Or you could just trade it in for a twin reverb, which is a very similar amp except the twin has more speakers and power, which give it more clean headroom.

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Posted: Tue Jun 22, 2010 9:51 am
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No more wattage can be had in its stock form. More wattage would mean using 6L6 or 5881 output tubes instead of 6V6, then you would need to replace the 5AR4 rectifier with a solid state one. Remember to rebias. I wouldn't risk it. I'm no expert, but to be safe you would probably need new transformers too and probably change some caps and resistors to handle more power.

It would be easier to get a new amp or speaker than trying to make the DRRI do something it isn't designed to do. Replacing the stock Jensen C12K speaker with one that has a higher sensitivity might do the trick. A lot of people use Eminence speakers in their DRRI's. I'm not familiar with Eminence so hopefully someone else can elaborate on them.

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Posted: Tue Jun 22, 2010 9:55 am
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firstrat wrote:
If there is a line out, you could run it into a power amp with more wattage then to a speaker cab.


There is no line out since this is a vintage style amp. However, there is an extension speaker out. The OP could run an extension cab.

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Posted: Tue Jun 22, 2010 9:58 am
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Alright, thanks for the insight.

Just a few questions though, I don't exactly know what the rectifier is, why would you have to switch to a solid state rectifier to make it louder? Can tube rectifiers only go to so many watts?

Would running an extension cab really make it louder, I've heard before that running a cab just pushes more air (whatever that means) and makes the sound bigger not louder.


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Posted: Tue Jun 22, 2010 10:31 am
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If you can't do it with 22 watts then obviously that amp is not for you and it's time to step up to something with more "grunt". Any attempt to significantly increase a Deluxe Reverb's output usually means compromising the amp's reliability and/or durability.

Try a Super Reverb or (if you're already deaf) a Twin Reverb.

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Posted: Tue Jun 22, 2010 10:55 am
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Louder is subjective and objective because our ears perceive loudness in a weird way. Yes, an extention cab may or may not make you sound louder. Pushing more air to me means the cabs ability to project sound. For instance, I play through a 4x12 cab. When I stand right next to it and when I walk across the room, I notice no volume change. It seems as loud on the other side of the room as it does right next to it to an extent. Also, the sound is a little different, more bass. So a closed cab projects sound across the room better than an open back cab, where much of the sound leaks out the back. So across the room it sounds louder with more bass, but the open back seems to lose that projection, but has a nice midrange response while standing closer.

Projecting sound across a room and simply being louder to be heard from further away are different concepts

Why exactly do you want it louder?

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Posted: Tue Jun 22, 2010 12:31 pm
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Bear Detective wrote:
Alright, thanks for the insight.

Just a few questions though, I don't exactly know what the rectifier is, why would you have to switch to a solid state rectifier to make it louder? Can tube rectifiers only go to so many watts?


A solid state rectifier won't give you more watts, but it will tighten up the sound. Tube rectifiers are not as efficient as solid state ones. At high volume, generally speaking, solid state rectifiers do not sag and they handle low notes differently than tube ones. Not really a volume difference, it's more of a feel or "perceived" volume difference because the amp has a stiffer "attack" with a solid state rec. You can buy plug in solid state recs from Weber or just about any tube store online. Mind you, the difference between solid state and tube recs is mostly noticed when you're cranking the amp.

I mentioned changing to a solid state rec because it will help give the DRRI the voltages it needs to power 5881's or 6L6's until the power transformer poops out :shock:

Check out some of this info:
http://www.google.com/search?hl=en&sour ... oEBU_QdpBt

I like Retroverbial's suggestion of getting a Super Reverb reissue.

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Posted: Tue Jun 22, 2010 12:55 pm
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Just to be clear -- it is the power transformer which supplies voltage (and hence, current) to an amp chassis's components. The rectifier merely culls off the AC portion to convert this voltage to usable DC. And there are ample numbers of vintage Fender amps equipped with GZ34/5AR4 tube rectifiers producing 35, 40, 50, and even 80 watt of power (AB165 Vibrolux Reverb, AB763 Super Reverb, 6G6-A Bassman, 5F8-A "big box" tweed Twin).

HTH

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Posted: Tue Jun 22, 2010 2:33 pm
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Thanks for the help, just to clear things up I don't actually own a drri yet, I've been shopping around for an amp and so far it's my favorite (along with a marshall jcm800 2204). I'm just kind of worried that it won't be loud enough because I used to have to put my Marshall AVT100 to 3/4 volume or so to be heard playing with my drummer at the time (granted that he played extremely loud), so 22 watts seems as though it might not do it.

I would consider the super or twin but they are a little too expensive for me, it's not a simple matter of saving up a little bit more because I have to pay for school, I would be barely affording the drri, maybe I could wait till next year though.

(what about a vibrolux, is that similar to the drri?)


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Posted: Tue Jun 22, 2010 3:38 pm
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The AVT is a hybrid isn't it? 22 watts of all tube power is pretty loud. I have no problem getting over our very aggressive drummer with my 20 watt Egnater. Unless you play some really big stages, 20 watts is just fine.

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Posted: Tue Jun 22, 2010 4:47 pm
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Yeah. it's got a tube in the preamp, the rest is solid state, so obviously it's not like a 100 watt tube marshall but still pretty loud. Well I sure hope it'll be loud enough, would be a lot more comfortable if it were 40 watts though.

When you have the drri dimed (or close to) does it clean up with a decrease in the volume knob on the guitar while retaining a loud volume (ie, loud enough to play with a loud band)?


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Posted: Tue Jun 22, 2010 4:57 pm
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If you're looking for clean loud surf tones at Dual Showman volume levels, forget it. It will not happen. You could mic a DRRI which would vastly increase your overall volume but it would not do anything for you in the immediate vicinity of the stage (where you seem to indicate you need some additional "kick").

Mebbe you oughta think about a new drummer who knows his place in the "pecking order".

:mrgreen:

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Posted: Tue Jun 22, 2010 5:13 pm
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Well I don't really need a super clean sound, just figured I might want clean for some things I usually play with a fair bit of distortion (kind of weird that I want a DRRI but it sounded better than any marshall I tried, besides the JCM800 which kicked $@!, but I could really only afford the head and the clean on it is kind of lacking). I figure I can probably get a nice distortion with a tonebone hot british through it.


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