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All rights reserved. No part ot this publication may be reproduced in any form without the written permission of Roland Corporation. GUITAR AMPLIFIER I Owner's Manual ALL MANUALS ARE NOT THE SAME Congratulations! You've made the right choice. The Blues Cube 60 is the happy result of using Roland's technological expertise to obtain the best possible sound from your electric guitar. But to get the most out of your Blues Cube 60, you should go through this manual. You don't need to keep most amp manuals. But this one will explain important stuff about what makes a great sounding amp and how to get that killer tone. OUR DESIGN PHILOSOPHY An electric guitar doesn't come alive until it's plugged in. Your amp can actually be considered part of the instrument. In fact, it's almost like the body of a great acoustic, contributing greatly to the final sound. Even a vintage guitar can’t give you all it's got if you use a mediocre amp. We wanted to produce an amp that would simply sound great, so we went back to amplifier basics to rediscover exactly what great guitar sound is and what a great guitar amp is all about. We analyzed vintage amps from the 50's and 60's, from tweeds to blondes (white tolex-covered beauties) to blackface panels as well as a slew of blues-breaking British amps, all of them highly desirable. Results conclusively showed that a great amp not only has distinctive warm tones but must also be super-responsive to sound and distortion variations according to a player's picking dynamics and/or guitar volume control. Many people were involved in our research. Studio pros, vintage amp collectors, semipros and general electric guitar enthusiasts all were part of our listening panels. Then our engineers and amp designers used leading-edge analog technology to get all the best qualities we were hearing from these amps into the Blues Cube 60, spurring a new development like the Tube Logic Technology (*). This includes a unique RECTIFEX circuit that simulates two rectifier types — the classic tube rectifier and the modem diode rectifier. It also simulates their effects on attack and picking nuances. The Blues Cube 60 brings out every aspect of your guitar. * Tube Logic Technology Tube Logic Technology reproduces the sound of various well-known vintage amps, based on scientific analysis and repeated hearing sessions. Not only the typical tube amp characteristics such as warm tones and a creamy overdriven sound, but also practical factors that make it possible to recreate other tube-like characteristics such as playing feel. These "feel factors" were logically analyzed and found to include, for instance, that an 8 ohm speaker's impedance fluctuates according to the volume and voice range, affecting the frequency response of a tube's power amp stage as well as a pre-amp stage having high-impedance signal path and nonlinear amplitude curve. Tube Logic technology can faithfully emulate such characteristics that are important in producing good guitar sounds, but previously didn't have much attention paid to them. FEATURES ✓ Two-channel configuration—NORMAL channel and LEAD channel, each with a dedicated circuit for independent sound characteristics. Switching channels can also be done using an optional footswitch. ✓ The NORMAL channel delivers clean sound perfect for traditional jazz or country or a warm, crunch sound optimized for blues and rock by switching on CRUNCH. ✓ The LEAD channel features two volume knobs (PRE VOL and POST VOL) along with a BOOST switch for screaming high gain that is well-suited for rock blues and metal. ✓ Each channel has its own three-band tone control that is tuned to complement that channel's sound character. ✓ The active PRESENCE knob — usually available only on liigh-end units — works on the signal within the power section and adds lustrous highs to the sound even at maximum distortion. \/ The newly developed RECTIFEX circuit emulates two different power amp rectifiers to offer a choice of rectification characteristics, very desirable when using distorted sound. ✓ Just like in vintage amps with reverb, an "Accutronics" spring reverb unit offers that authentic twangy reverb that's so much a part of a classic guitar sound. ✓ The built-in heavy-duty 12" speaker is a direct result of intensive research into famous guitar amp speaker units, such as the "Blue" and British "Greenback" speakers. And with the power amplifier section going into soft clipping, the speaker will deliver an SPL much higher than its rated 60W R.M.S. ✓ For external effects, a versatile effects loop lets you connect anything from effects pedals to professional studio rack units. The LEVEL select switch and effect/dry ratio control offer incredible versatility. 1 NAMES OF THINGS AND WHAT THEY DO BBC-60 Control Panel 1. Input 3. Normal Channel An ultra Hi-Z INPUT jack (1-1) makes sure the vintage single coil pickup sound is at its best. 2. Channel Select Switch between the NORMAL chan...