Little Giant 5 112 Combo Guitar Amplifier User’s Guide
TABLE OF CONTENTS Introduction ..........................................................................3 BH5-112 Special Features ...............................................4 The Front Panel ....................................................................5 The Rear Panel .....................................................................6 Important Information About Tubes and Tube Products ............7 A Brief History of Tubes ..................................................
Introduction Congratulations! You have just purchased what we believe to be one of the most significant objects that you’ll acquire in your lifetime—a tube amp. If that’s not enough, you’ve gone and gotten yourself a Blackheart Engineering tube amp. So let’s take a big picture view of this for a second: You’re a guitar player that could have bought anything to bring your mind-bending chops to life, to unleash upon the masses the wrath of your otherworldly, mad riffin’ skills.
BH5-112 Special Features: • Single-ended Class A circuit • All tube signal path • One 12AX7/ECC83 dual-triode preamp tube and one EL84/6BQ5 pentode output tube • Pentode (5W rms) Triode (3W rms) switch • DC filament power supply for all tubes • 3-band EQ • 16-gauge (1.5 mm) thick, folded and spot welded steel chassis • Double-sided custom color PCB with 2 oz.
The Front Panel VOLUME TREBLE MIDDLE BASS LI T 0 1 10 2 0 10 3 0 10 0 4 TL E GI A 10 5 5 WATTS ON 3 WATTS OFF 7 8 NT INPUT 6 1. INPUT: Use this jack to connect your guitar to the amplifier using a high-quality shielded instrument cable. 6. Indicator Lamp: This illuminates when the amplifier is turned on (power, that is). 2. VOLUME: Use this to adjust the output level. 7. 3. TREBLE: Use this to adjust the output level of the high frequencies.
The Rear Panel VOLTAGE STICKER LITTLE GIANT 5 - SINGLE ENDED/CLASS A AMPLIFIER WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE AVIS: RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. MANUFACTURING DATE SERIAL NUMBER C LOUDSPEAKER OUTPUTS US POWER OUTPUT 5 WATTS RMS CONNECT SPEAKERS BEFORE USE DESIGNED FOR CRATE IN USA. MANUFACTURED IN CHINA.
Important Information about Tubes and Tube Products: A Brief History Of The Tube: In 1883, Edison discovered that electrons would flow from a suspended filament when enclosed in an evacuated lamp. Years later, in 1905, Fleming expanded on Edison’s discovery and created the “Fleming Valve.” Then, in 1907, Dr. Lee de Forest added a third component – the grid – to the “Fleming Valve” and the vacuum tube was a fact of life. The door to electronic amplification was now open.
Important Information About Tubes and Tube Products (continued): The power tubes are the largest tubes used in an amplifier. These tubes convert the low-level, conditioned signal from the preamplifier into a level that is sufficient to drive the speakers. There are several types of power tubes available, each of which offers a different performance/sound characteristic. For example, the EL34 power tube produces a great classic rock sound.
Important Information About Tubes and Tube Products (continued): Whenever you replace the power tube(s): • Always have the amplifier’s bias voltage checked by a qualified service center. Improper bias voltage will cause degradation in performance and possibly damage the tubes and/or the amplifier. (See “The Importance of Proper Biasing”, below for more information). • We highly recommend that you replace the driver tube(s) as well.
Important Information About Tubes and Tube Products (continued): Survival Tips For Tube Amplifiers: To prolong tube life, observe these tips and recommendations: • Match the impedance of your speaker cabinet(s) to your amplifier. Improper impedance matching will contribute to early tube degradation and may cause premature tube failure. • Make sure the speaker(s) are properly connected prior to turning on the amplifier.
System Block Diagram PENTODE – TRIODE 5 WATT – 3 WATT SWITCH Declaration Of Conformity Manufacturer: LOUD Technologies Inc. 16220 Wood-Red Rd. NE Woodinville, WA 98072, USA Product Name: Product Type: Complies with Standards: LVD: Safety: EMC: Blackheart BH5-112 Audio Amplifier 92/31/EEC, 93/68/EEC, & 73/23/EWG EN60065 EN55013, EN55020, EN55022, EN55103, EN61000-3-2, & EN61000-3-3 The official Declaration of Conformity for this product is kept on file at: LOUD Technologies Inc.
BH5-112 TECHNICAL SPECIFICATIONS Output Power Rating Pentode: 5 W rms @ 22% THD, 16 ohm load Triode: 3 W rms @ 9% THD, 16 ohm load Signal-to-Noise Ratio 63 dB, Typical Input Impedance 1 Meg Ohm EQ Treble: 20 dB range @ 10 kHz 7 dB range @ 1 kHz 11 dB range @ 100 Hz Middle: Bass: Preamp Tube 1 x 12AX7/ECC83 Power Tube 1 x EL84/6BQ5 Rectifier Solid State Speaker Specs Custom Designed Eminence Blackheart Speaker Model 1216A, American Voiced, 12", 75 W, 16 ohm, 1.
