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KBR-3D

-WARNING-

The KBR-3D can produce extremely high sound pressure levels.  Hearing protection is
advised.  The KBR-3D must be earthed and connected to a correct power source.

-SPECIFICATIONS-

Design Range:

Rotary Channel

Input 1

375 mV RMS

100K ohms

Input 2

Unlimited

50K ohms

Stereo Channel

All inputs

175 mV RMS

100K ohms

Power amp inputs

420 mV RMS

22K ohms

Dry rotary output

420 mV RMS

600 ohms

Tube: 12AX7EH – 7025 – 5751

Power Amplifiers: 100/100 watt RMS main full range amplifiers

     45-watt RMS  > 800 Hz horn amplifier

Frequency Response: Full Range speakers 50-15 kHz + -5 dB

          Horn driver 600 Hz-8 kHz

Speakers: 2  10” Eminence Beta 250-watt, 8 ohms

    2 80-watt 3.5X3.5 Ferro-cooled horns, 8 ohms

                 1  80-watt MS 1.2 proprietary diaphragm horn driver, 8 ohms

Dimensions: 24” W  21” H  16”      Weight 68 lbs.

Power: Fuse 

(Slo-Blow)

US

117 VAC

50/60 Hz

300 watt

5 amp

Europe

230 VAC

50/60

300 watt

2.5 amp

Japan

100 VAC

50/60

300 watt

5 amp

Fuse Location: The fuse is located in the power inlet module on the rear panel.  

Use only the

recommended size of fuse as stated above.

Summary of Contents for KBR-3D

Page 1: ... Power Amplifiers 100 100 watt RMS main full range amplifiers 45 watt RMS 800 Hz horn amplifier Frequency Response Full Range speakers 50 15 kHz 5 dB Horn driver 600 Hz 8 kHz Speakers 2 10 Eminence Beta 250 watt 8 ohms 2 80 watt 3 5X3 5 Ferro cooled horns 8 ohms 1 80 watt MS 1 2 proprietary diaphragm horn driver 8 ohms Dimensions 24 W 21 H 16 Weight 68 lbs Power Fuse Slo Blow US 117 VAC 50 60 Hz 3...

Page 2: ...annel stereo horn microphones There are two 10 250 watt Eminence Beta speakers and two 3 5X3 5 80 watt Ferro cooled horns driven by 100 100 watt amplifiers provide stunning clarity and transient response A 12AX7EH tube pre amp and 45 watt amplifier driving a 80 watt MS 1 2 diaphragm for the rotary horn in conjunction with the enhanced stereo low rotor simulator provide rich liquid REAL rotary soun...

Page 3: ...e a 147 tube output stage when overdriven This design provides silky smooth sound until pushed into clipping at first crunchy and at extremes provides a gnarly massive tube grind A combination of keyboard volume X volume pedal X pre gain settings determines the overall drive of the 12AX7EH Post Gain This control allows silky smooth clean tube sound with settings of 8 10 and utilizes the full outpu...

Page 4: ...applied it is routed to the tone controls global and to the power amplifiers The right mono input will send a mono source to the tone controls and both amplifiers Input 1 and 2 can also operate as independent amplifiers with global tone and volume controls Expand This circuit operates on input 1 only The expand switch and corresponding yellow indicator selectively enhance the difference between th...

Page 5: ...signal source 420 mV RMS nominal Volume must be controlled by the signal source Dry Rotary Output This signal is tapped just after the 12AX7EH post gain control before the low rotor simulator volume and bass controls It provides a line level output to drive reverbs and other effects where the rotary effect is not desirable Many classic organ speakers used non rotary reverb in conjunction with rota...

Page 6: ...peaker from the front Disconnect the two crossover wires note polarity to allow removal from cabinet Amplifier Tube Belt Diaphragm Removal Access 1 Remove the 4 screws on each grill cover and remove both grill covers 2 Carefully remove the two 10 speakers and disconnect the spade lugs note connection polarity when removing the wires then remove the two tweeters 3 Remove the 3 screws on the round b...

Page 7: ... a proprietary MS 1 2 diaphragm DO NOT USE other diaphragms You can purchase the MS 1 2 through Motion Sound Internal User Adjustments The dynamics and speeds of the KBR 3D s horn motor and low rotor simulator are calibrated at the factory to simulate a 147 type rotary speaker that is well used but maintained Three parameters of the horn and low rotor simulator may be adjusted to user preference a...

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