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Post subject: Is a DRRI half a Twin Reverb?
Posted: Sun Jul 18, 2010 7:27 pm
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Minor point, but have been told my logic is wrong.

Notwithstanding the difference in amp ckts (6V6 vs 6L6, for one)

I'm thinking that a DRRI's 22w into one 8 ohm speaker has durn near exactly half of the Twin Reverb's sonic output.

Although the Twin is rated at 85 watts (roughly 4x the DRRI's), that's measured into it's 4 ohm load, two 8 ohm speakers in //.

So a guy with 2 DRRI's could put out as much sound as a Twin.

Amp/math/electronic guru's?

Please collaborate or correct my logic.


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Posted: Sun Jul 18, 2010 7:54 pm
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(sigh......)

I'm not really seeing a point to this hypothesis but for the record, a Twin Reverb is fully capable of pushing 100 watts RMS with a couple of pedals. As well, the Deluxe Reverb should've been rated for 25 watts since I've seen these amps bench-checked and measured at that output with a calibrated test rig and driven to max power with a 500 mV input signal (about the same amplitude as a humbucker-equipped guitar). The DR is a loud amp. But if you need louder, step up to a Super Reverb or Twin Reverb.

Unless you just prefer lugging a bunch of stuff around......

My zwei pfennings' worth.

Arjay

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Posted: Sun Jul 18, 2010 8:15 pm
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Howdy Retro, hope that wasn't a 'heavy' sigh.

Point is simply for my own clarification.

Thanks for the response, although it's not clear to me whether you think my reasoning is sound.

Perhaps if I put it in the form of a question.

Does a Deluxe Reverb put as much power to, and get as much sonic output from, it's one speaker, as a Twin Reverb puts to and gets out of one of it's two speakers?

I play through 2 DRRI's in // via a Lehle amp switch pedal and even though they're combined weight is heavier, I find it easier to schlep them than one Twin. Balances the load. Plus I don't always need to haul both.


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Posted: Sun Jul 18, 2010 8:47 pm
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You have a few "apples vs oranges" comparisons here that are not easily reduced via a common denominator.

First, the human ear does not perceive sound in a linear fashion. Eg: doubling an amplifier's output power only results in a 3 dB increase in volume, which is only barely perceptible to the listener.

Second, disconnecting one speaker from a Twin Reverb causes an immediate 100% mis-match as far as output impedance is concerned.

For your theory to yield any meaningful data, you'd need to connect the Twin Reverb to a single 12-inch speaker of 4Ω.

And in that case, no......the Twin will still be capable of generating its rated 85-watt output through the single driver. Which in practical terms means it's still four times the rated power of the Deluxe Reverb -- a 12 dB difference in perceived volume, which is substantial.

As far as your particular rig goes, I think it's an ideal set-up (sorta like a Pro Reverb configured for stereo operation). I often play a pair of amps myself (though they are not identical units). One's a DRRI in a custom blonde 1 x 15 cab and the other's a vintage BF Bandmaster in a brown Tolex 2 x 10 combo configuration. They're very simpatico together.

HTH

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Posted: Sun Jul 18, 2010 9:41 pm
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(disregard)

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Post subject:
Posted: Sun Jul 18, 2010 9:55 pm
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uh ohh, you weren't gonna swear at me were you? Ha!

Thanks for the rig compliment (and taking the time to type all that out). I like it a lot...think I'd really like plugging into yours.

I still don't get it, but I must be thinking only in regards to the simple #'s I referenced.

btw, I stuck one of these DRRI's into a tweed cab from Weber...some might think thats sacralidge, but I love the blackface amps and I usually stand my guitars in front of them. Half look a lot better in front of the tweed.


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Posted: Sun Jul 18, 2010 10:12 pm
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No, not at all.

Once I realized the discussion was focused on "esoteric curiosity", it all made sense.

Here's the two rigs I often run in tandem......

Image

The Bandmaster "Pseudo Pro" delivers raw grit through a pair of alnico CTS 10's from a '67 Super Reverb while the DRRI (aka "The Spankmaster") provides smooth punch from its 15-inch JBL D130F.

It's a solid rig.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject:
Posted: Sun Jul 18, 2010 10:24 pm
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Wow...rather phenominal. Kinda hard to describe without using an expletive, ain't it.

Man, I love showin' off junk but I'm feelin' a little humble.

So, where exactly are you at anyway?


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Posted: Sun Jul 18, 2010 10:38 pm
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Just as my tag line says......if I could throw a rock 15 kilometers to the south, it would land in Sonora, Mexico.

Thanks for the kind words.

I just started another restoration this week -- a '67 Showman which should kick some serious booty once it's finished.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject:
Posted: Sun Jul 18, 2010 10:51 pm
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Didn't see the tagline but figured as much with the Tombstone reference. Hope things are going well for you all down there...really rootin' for AZ.

'67 Showman...Dick Dale territory?


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Posted: Sun Jul 18, 2010 11:02 pm
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Dick Dale is normally associated with the blonde 6G14 Showmans.

I'm known around here as a "blackface snob"......

Image

:mrgreen:

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject:
Posted: Mon Jul 19, 2010 11:02 pm
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I shoulda looked it up!

Don't let it bother you, I've been called worse. (in fact she supposedly even loved me!)

Btw, a DRRI's input power required, according to the owners manual is 100 watts, a TRRI's is 260.

Interesting that when Fender describes it's amps power, they also mention what the load is. 85w in to 4 ohms, 22w into 8 ohms, 40w into 2 ohms, etc.


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Posted: Mon Jul 19, 2010 11:09 pm
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LOLOL

Indeed, the Showman also pulls 260 watts from a wall socket. Back in the day, the vintage tube charts used to indicate the power consumption requirements as well.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject:
Posted: Tue Jul 20, 2010 5:36 am
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You're right Arjay and I'm sure you've heard many guys say,"this is a 260 watt amp!" or whatever it was marked. :)


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Posted: Tue Jul 20, 2010 8:31 am
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Rebelsoul wrote:
You're right Arjay and I'm sure you've heard many guys say,"this is a 260 watt amp!" or whatever it was marked. :)


Indeed!

I once saw a vintage Princeton Reverb listed on Ebay as a "200 watt amp", apparently because there was a 200-watt sticker next to the AC convenience outlet on the amp's rear panel.

I think the seller's name was Beavis. Or was it Butthead.....?

:mrgreen:

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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