MANLEY LABORATORIES, INC. THE NEO-CLASSIC 300B PREAMPLIFIER OWNER'S MANUAL TUBES RULE brought to you by the clever folks at: MANLEY LABORATORIES, INC. 13880 MAGNOLIA AVE. CHINO, CA. 91710 USA TEL: (909) 627-4256 FAX: (909) 628-2482 www.manleylabs.com Rev.
CONTENTS SECTION PAGE INTRODUCTION & GENERAL NOTES 3 MAINS CONNECTIONS 4 CONNECTING YOUR PREAMPLIFIER 5 FIGURE 1 FRONT PANEL 6 FIGURE 2 TOP VIEW 7 FIGURE 3 BACK PANEL 8 OPERATIONAL NOTES 9 SPECIFICATIONS 10 WARRANTY 11 WARRANTY REGISTRATION 12 2
INTRODUCTION THANK YOU!... for choosing the Manley Laboratories "The 300B Preamplifier". Handcrafted in Chino, CA, the Neo-Classic 300B Preamplifier uses beautiful sounding parts in a clever and clean signal path. This Preamp features the 300B direct heated triode as the line and headphone driver. The 300B is typically used in low power amplifiers as a power tube.
MAINS CONNECTIONS Your Manley Neo-Classic 300B Preamplifier has been factory set to the correct mains voltage for your country. (Well, that is what we intended to do when we knew where it would be initially shipped.) The mains voltage that we built this Manley Neo-Classic 300B Preamplifier to operate with is marked on the serial badge, located on the rear panel. Check that this complies with what comes out of your wall.
CONNECTING YOUR PREAMPLIFIER Setting up your preamplifier is rather easy. 1. Please refer to page 8 for an illustration of the back of the preamplifier. 2. Connect the RCA outputs to the input of your power amplifiers when they are off. 3. UNBALANCED inputs are found on RCA jack inputs and can be connected to any line level sources such as CD players, tuners or tape decks. 4. All RCA jacks are clearly labeled as to a typical function.
FRONT PANEL HEADPHONES VOLUME OFF ON AUX TAPE CD TUNER VIDEO A B C D E F A - INPUT SELECT - 5 Position switch for input selection. Each input is electrically identical. The RECORD OUT directly follows this switch. There is no buffer amp to isolate the effects of loading and cable capacitance so we recommend disconnecting any interconnect cables from the RECORD OUT if you are not recording. B & C - HEADPHONE JACKS - Standard 1/4" stereo headphone jacks.
TOP VIEW OD3 5AR4 or 5U4G OD3 5AR4 or 5U4G A 300B 300B B C 6SL7GT 6SL7GT A - HEADPHONE IMPEDANCE SWITCH - You should set this switch to best match your headphones. You may have to look at the specification sheet to get the value in ohms. If using two sets of phones divide that number in 2. If you don't have this info then pick the setting that sounds best - no harm will be done. If the phones are lower than the switch setting, slight loss of extreme highs may occur.
REAR PANEL F C D E A B G J H I A - MAINS FUSE - Depending on your local power outlet's voltage, replace with 3A SLOBLO fuse (120 V) or 1.5A SLO-BLO fuse (230V). B - IEC MAINS SOCKET - Standard IEC mains socket (120/240 VAC as indicated) C - MAIN OUTPUT - Main left and right outputs driven by 300B's. Connect these to your power amplifier inputs when the amps are off. D - SUBWOOFER OUTPUT - Same as Main Output. E - RECORD OUTPUT - Set at input line stage level.
OPERATIONAL NOTES SWITCHING ON The power knob is located on the right hand side of the front panel. Turn the knob to the right to turn on the preamp, or to the left to turn it off. Don't ever rock it back and forth rapidly. Note: on this knob and on the input selector there is a long garolite 1/4" rod shaft that connects the faceplate knob to the actual switch in the back of the unit. If the knob starts spinning round and round then the little screws on the shaft-to-switch coupler have come loose.
SPECIFICATIONS * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Inputs: 5 stereo pair unbalanced RCA jacks Outputs: 2 stereo pairs MAIN out same as SUB out unbalanced RCA jacks RECORD output: 1 stereo pair pre-volume control unbalanced RCA jacks HEADPHONE Outs: 2 front panel 1/4" headphone jacks Optimized headphone impedance switching: 30-400 ohms to 300-4000 ohms MUTE: Selecting HEADPHONE operation mutes LlNE outputs Output Vacuum Tubes: 2 x 300B Electro-Harmonix Input Tubes: 2 x 6SL7GT Ele
WARRANTY Manley Laboratories, Inc. WARRANTY STATEMENT effective 10/2008 All Manley and Langevin branded equipment designed and built by Manley Laboratories, Inc. is covered by a limited warranty against defects in materials and workmanship for a period of 90 days from date the unit is sold to the Dealer to the original purchaser only. A further optional limited 5 year transferable warranty is available upon proper registration of ownership within 30 days of date of first purchase.
WARRANTY REGISTRATION We ask, grovel and beg that you please fill out this registration form and send the bottom half to: MANLEY LABORATORIES REGISTRATION DEPARTMENT 13880 MAGNOLIA AVE. CHINO CA, 91710 USA Or you may FAX this form in to: +1 (909) 628-2482 or you may fill in the online warranty registration form found in the Tech Support section of our website www.manleylabs.
