THE NEO-CLASSIC 300B PREAMPLIFIER RC OWNER’S MANUAL TUBES RULE rev4.20.
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 REMORA REMOTE CONTROL OPERATING INSTRUCTIONS 10 SPECIFICATIONS 14 2
INTRODUCTION THANK YOU!... for choosing the Manley Laboratories 300B Preamplifier RC. Handcrafted in Chino, CA, the Neo-Classic 300B Preamplifier RC 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 Neo-Classic 300B Preamplifier RC has been factory set to the correct mains voltage for your country. The voltage setting is marked on the serial badge, located on the rear panel. Check that this complies with your local supply. Export units for certain markets have a moulded mains plug fitted to comply with local requirements.
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 AUX TAPE CD TUNER VIDEO A B C D E ON 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 5U4G OD3 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 A F C D E 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.
REMORA REMOTE CONTROL OPERATING INSTRUCTIONS Quick Start: Your Remora Remote Control system has been configured and tested at the factory to verify that the communication link between the radio frequency transmitter and the mating receiver-decoder inside the Neo-Classic 300B Preamplifier has been properly established. Before beginning, ensure that a fresh 9V alkaline battery has been installed in the Remora Remote transmitter. Yes, we installed a new 9V battery in the Remora Remote when it left the factory.
Remora Remote Features! 1. Remote transmitter and receiver operate under crystal-clocked microprocessor control for maximum signal discrimination, flexibility, and system range. 2. The user may easily reprogram the user-number portion of the remote system’s serial I.D. data stream. This will eliminate the possibility of undesired operation due to remote command collisions. 3.
The Remora system is highly resistant to false operation due to noise or other remote signals, but the range will be reduced if the competing signals or noise is very strong. If you experience intermittently poor range, briefly try operating the equipment at another location free of possible sources of interference before contacting your dealer or Manley Labs. Keep the remote and all other parts of the system away from rain or moisture of any sort.
How to change the user-numbers and re-pair the system: Ordinarily there will seldom be a need to change the user-number. Changing the user-number requires a few more ballet steps, as listed below. Some steps are time-window sensitive to help prevent pairing errors due to interference from other signals on the radio channel.Please read over the list of required actions and LED reactions completely before attempting to reprogram your Remora system user-number. 1.
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 Electro-Harmonix * Rectifier Tubes: 2 x 5U4GBEH Elec
