Doc Electro Knows More About Drivers And Cabs Than Your Average NYC Commuter
With every video, Doc Electro has me more and more convinced that his "Dr." prefix might be more than an honorary tile; in this video, he drops more science about cabinet design and construction than the Yankee Workshop. Dude makes his own folded wooden high-frequency horns, which he would have shown us an example of had he not lent it out to a local community function. Doc Electro is truly a scholar and a gentleman.
Enjoy this free eduction, folks.
DOC ELECTRO: Hey! I'm Doc Electro for Doc Electro Amplification in Jeffersonville, Indiana. I am a warranty station for 70 brands of professional music everything from Allen & Heath to Yamaha.
About 5 or 10 years ago, I decided to start building my own amplifiers
These speakers are scientifically tuned. In other words, the drivers that are used, which happen to be Eminence -- I love the Eminence driver. It's in excellent price, great guarantee, industry standard for years, and I suggest it highly. Try an Eminence.
In any case, this is a bass cab. It has a larger air volume and a different type of speaker in it, and the speakers fire the baffle. In other words, they're mounted behind the baffle and they move that board as they're hitting so the lower tones come more presentable out of this speaker cabinet.
This one is a high cabinet. The speakers are mounted on the front. It doesn't move the baffle. It doesn't have as deep bass, and using the appropriate speaker you have more of a high end sound out of it than this, so combined together they have outstanding tonal range. As a matter of fact, the latest thing that we've been doing is using separates. Now, I know it's been done. Trace Elliot did it, a great company, but we're taking it one step further. We're using a 412 with a separated cabinet at the low end down at the bottom, mid range at the top, and horns. Now the horns are folded wood so you don’t have this bright brassy dome type sound. It's a paper cone that's behind the folded wood, but each one of those speaker assemblies is crossed over with a passive crossover, allowing it to work in its range that it was designed to, the low end is now crisp and sharp, the mid range present and vocal, and the high is clear. And if you play a chord, it has the low component, the mid component, and the high component to it, an open chord will say, every tonal range is coming out of the entire speaker without muddying it. You can hit a low E, and the resonance will come out of the low cabinet while you dance on the higher strings of the 12th, and you can hear the clarity without the disruption of the speaker attempting to move in a low range while you're trying to do the high range. It is an old home audio thing. I came from home audio to begin with and I felt that what we really want on stage is the sound and the clarity and the quality of home audio type sound. Why be muddy? Let's clean it up, so we're building separates for not only bass cabinets but for guitar cabinets.
So far, the reaction is sunny. As a matter of fact, tomorrow's coming in, that fellow's coming in with another bass rig to split it up and get that voice. The tonal range is superb, and I think it's a great idea.
These are three cabinets. This is a bass cab in the middle, 215's, very low. This would be the midrange cab, and the horn, unfortunately, is not here. I loaned it to the state fair but it's a folded wood horn with a large paper cone drive ready, and it sits on top and it's blue.
PATRICK OGLE: It's blue also and it's a little bit smaller obviously than --
DOC ELECTRO: It's the full size of this.
PATRICK OGLE: Of that? Okay. So it's --
DOC ELECTRO: Yeah. It's a 15" folded wooden horn, and in the back there's two 6" drivers, and they fire when they come out of the horn.
PATRICK OGLE: Well let me guess. You want to have somebody else carry this around for you. [OVERLAPPING]
DOC ELECTRO: Oh, this? I'm too old to carry it. Those guys carry them. That's right, and this particular case it's a bass cabinet.
PATRICK OGLE: Right.
DOC ELECTRO: Presently, the only thing I'm billing is the two front ends.
PATRICK OGLE: Is the two separates which we talked about before.
DOC ELECTRO: And what's interesting is that in the analysis I've seen with bass, and the tonal range that its capable of, there doesn't appear to be a big difference between two bass sounds, the power sections, and solid state. A good solid state power section will faithfully reproduce that bass wave just the way it is so I don't see a need for the big giant SVT classic that's 300 pounds for 300 watts of tube. Heavy, expensive, hot, run a lot of current. If we take and use a tube front amp and put it into a good solid state amplifier, you end up with two rack spaces, and you can have infinite power and the sound's great. It's the tube front end on the bass that's needed.
Now, with guitar work, it's that output stage that really helps so I wouldn't go solid state at all...
PATRICK OGLE: On a guitar.
DOC ELECTRO: ...in the output stage, and I don't build solid state amps here and so I would suggest on the tube front end a QSC amp or one of the top-quality amps like that, and you come down with a great bass sound.





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