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Radian Technologies VT R800 7040 00 - page 1
Radial Headbone VT & SS www.tonebone.com Owner’s Manual Radial Engineering 1638 Kebet W ay , Port Coquitlam BC V3C 5W9 tel: 604-942-1001 • fax: 604-942-1010 email: info@radialeng.com • web: www .radialeng.com Radial Engineering is a division of C • TEC (JP CableT ek Electronics Ltd.) ™ Part # VT R800 7040 00 SS R800 7084 00 ...
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Radian Technologies VT R800 7040 00 - page 2
>>> IMPORT ANT SAFETY AND LIABILITY NOTICE <<< Radial Engineering (JP Cabletek Electronics Ltd.) manufactures products that are safe for use when connected as per the instruc- tions in our owner ’s manuals. Manuals are freely available for download on our web sites. As it is impossible for Radial to ensure the user is following ...
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Radian Technologies VT R800 7040 00 - page 3
True to the Music Radial Engineering Headbone Owner ’ s Manual Congratulations on your purchase of a Radial Headbone! As part of the growing family of T onebone products, the Headbone is de- signed to open doors to creative new sounds and provides the discerning guitarist with greater options on stage and in the studio with a simple, yet extremel ...
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Radian Technologies VT R800 7040 00 - page 4
INTRODUCTION Whether you have a Headbone VT or a Headbone SS, the setups and connections are identical. For simplicity , this manual will discuss the Headbone VT . It is important to note that because of the very different nature of solid-state amps and valve-tube amps, each Headbone’s internal circuit is different. The Headbone VT is exclusively ...
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Radian Technologies VT R800 7040 00 - page 5
True to the Music Radial Engineering Headbone Owner ’ s Manual Why is this setup so cool? Because it truly covers all of the bases: the powerful clean sound from a 100-W att amp is radically different than an all-tube 30-W att amp cranked to 10. Not just as far as loudness goes, but also as far as tone. Being able to use that reserve power for bl ...
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Radian Technologies VT R800 7040 00 - page 6
True to the Music Radial Engineering Headbone Owner ’ s Manual FEA TURE SET 1. Input Buffered – This is the primary input for your guitar and pedal effects that do not buf fer (pre-amplify) the signal. 2. Input Direct – Used when driving the Headbone from a device, like the Radial Loopbone, that buffers (pre-amplifies) the signal. 3. T o Amp ...
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Radian Technologies VT R800 7040 00 - page 7
True to the Music Radial Engineering Headbone Owner ’ s Manual output jack back to the Headbone. This is a speaker level signal, so use a good quality speaker cable for best power transfer . 8. From Amp-2 Output – Connects from the second amplifier ’s speaker output jack back to the Headbone. 9. T o Speaker Cabinet – Connects the Headbone ...
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Radian Technologies VT R800 7040 00 - page 8
True to the Music Radial Engineering Headbone Owner ’ s Manual 5 Before making any connections, ensure that your ampli- fiers are turned off, the Headbone power supply is disc on- nected, and volume controls are set to zero. 1. Begin by connecting your guitar to the Headbone’ s ¼” Buffered Input . This will allow you to test the system more ...
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Radian Technologies VT R800 7040 00 - page 9
True to the Music Radial Engineering Headbone Owner ’ s Manual 6 Throughout this manual, referenc es are made to “guitar level signals” and “speaker level signals”. The Headbone passes both types and it is important to use the proper cables. A guitar level signal requires a good quality shielded cable to work well. Y ou will find that us ...
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Radian Technologies VT R800 7040 00 - page 10
True to the Music Radial Engineering Headbone Owner ’ s Manual T o best explain the workings of the Headbone, take a minute to study the block diagram. Reading from left to right, you can see the inputs, the high-impedance guitar switching, the control circuitry and the speaker level switching. The Input Signal Path The Radial Headbone’s input ...
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Radian Technologies VT R800 7040 00 - page 11
True to the Music Radial Engineering Headbone Owner ’ s Manual 8 to avoid any clicks or pops. The PIC digital controller controls this action (see block diagram on page 7). Switching Speaker Signals T o accomplish this task, the PIC sends a status change command to a series of internal relays that connect the speaker to the active amp, and connec ...
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Radian Technologies VT R800 7040 00 - page 12
True to the Music Radial Engineering Headbone Owner ’ s Manual ance. Y ou must manage the speaker connections for the best impedance match. It is important to note that most amplifiers are designed to work best at their rated impedance. If your amp features selectab le impedance loads, use the one that matches your speaker cabinet. A lways consu ...
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Radian Technologies VT R800 7040 00 - page 13
True to the Music Radial Engineering Headbone Owner ’ s Manual 10 from electrical shock. Most amplifiers have been subjecte d to safety tests from authorities like UL or CSA. Amplifiers that have passed these tests are safe to use with your Headbone. If you intend to use the Headbone with amps that only have 2-prong AC plugs, such as old vintag ...
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Radian Technologies VT R800 7040 00 - page 14
True to the Music Radial Engineering Headbone Owner ’ s Manual 11 F AQ Q: I heard that tube amps must always see a speaker load or else they will blow up. Is this true? A: This is true. T o deal with this, the Headbone is equipped to manage two loads: the speaker for the active amp and a load resistor for the standby amp. The Headbone transitions ...
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Radian Technologies VT R800 7040 00 - page 15
True to the Music Radial Engineering Headbone Owner ’ s Manual 12 amps and speaker can I be? A: As a general rule, we do not recommend running cables any more than 20 feet as you are subjecting the signal to increased resistance. If you are intent on doing so, use good quality cables. For speaker con- nections use large gauge (12A WG) speaker cab ...
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Radian Technologies VT R800 7040 00 - page 16
RADIAL LIMITED ONE YEAR W ARRANTY Radial Engineering - a division of JP CableT ek Electronics Ltd. (“Radial”) warrants this product to be free from defects in material and workmanship to the original owner and will remedy any such defects free of charge according to the terms of this warranty . Radial will repair or replace at its option any de ...
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