Blackheart BH15-112 User's Guide Page 1

BH15-112 Handsome Devil Combo Guitar AmplifierUser’s Guide

10Survival Tips For Tube Amplifiers:To prolong tube life, observe these tips and recommendations:• Match the impedance of your speaker cabinet(s) to

11Declaration Of ConformityManufacturer: LOUD Technologies Inc.   16220 Wood-Red Rd. NE Woodinville, WA 98072, USA Product Name: Blackheart BH1

12BH15-112 TECHNICAL SPECIFICATIONSOutput Power Rating Pentode: 15 W rms @ 12.3% THD, 16 ohm load Triode: 7 W rms @ 9% THD, 16 ohm loadSignal-

2TABLE OF CONTENTSIntroduction ...3 BH15-112 Special Features ...

3IntroductionCongratulations! You have just purchased what we believe to be one of the most significant objects that you’ll acquire in your lifetime—a

4BH15-112 Special Features:• Push-Pull Class A circuit • All tube signal path • Two 12AX7/ECC83 dual-triode preamp tubes and two EL84/6BQ5 pentode

5The Front Panel1. INPUT: Use this jack to connect your guitar to the amplifier using a high-qual-ity shielded instrument cable. 2. DRIVE: Use this

6The Rear Panel9 10 11 12The rear panel is located inside the open back of the cabinet, towards the top. It has connections for the AC power cord, the

7Note: Where the built-in speaker is not shown below, it is not connected.Typical connections to external speaker cabinets16Ω 16Ω 16Ω 16Ω16Ω8Ω4Ω16Ω16Ω

8The Nature Of Tubes — Why (And When) To Replace Them:Tubes are made up of a number of fragile mechanical components that are vacuum-sealed in a glass

9The Importance Of Proper Biasing:For the best performance and longest tube life, proper biasing is imperative. Bias is the nega-tive voltage which is