Connecting Your Amplifier

Setting up your amplifiers is rather easy.

1.Connect all source components (turntable, CD, Tuner, Tape DAT, etc.) to your preamplifier.

2.Connect the interconnects from the output of the preamplifier or switching center to the RCA input on the top rear of the amplifiers.

3.Connect the hot or "+" speaker cable to the red binding post and the common or "-" speaker cable to the black binding post (See diagarm 2). Ensure that the other end of the cable is connected correctly to the speaker. Tighten the binding posts by hand. If you use a nut-driver (3/8") do not over-tightenthe posts or you may break the connections inside the amplifier.

4.Ensure that the "mains" switch on the front panel is in the "off" or "0" posi- tion. If the 300Bs are not inserted - do it now - the instructions are on page 4.

5.Turn on Preamplifier and any source components you plan to use.

6.Plug Amplifiers into wall outlets.

7.Set both amps up at the same settings. A good place to start is both amps set to S / E 18 WATTS and 3 dB of FEEDBACK.

8.Switch the square mains power switch to the ON or "1" position and allow the amplifier a minute or so to 'warm up'. The glowing panel and glowing tubes will indicate that the amplifier is on.

9.Turn up the volume on the preamp and enjoy. If something is "humming" don't panic. All you need to do is use a "3 pin to 2 pin AC adapter" or "cheater". If you don't have one they are available at most hardware stores for about a dollar. Usually one amp will need it but sometimes both. This is because a ground loop exists in the system. Too many grounds - You should only have one.

10.Now, while music is playing, try switching to PUSH / PULL. The differ- ence may or may not be subtle. Choose the mode you like best with this music. Turn the FEEDBACK switch to 10. The volume has become quieter so compensate for the difference at the preamp. Listen a bit until you are used to this, then turn down the volume and turn back the FEEDBACK to 0. Adjust the preamp for the same volume as the previous test. Now, you should have a reasonable opinion of the effects of the FEEDBACK. You can turn this control step by step to the position that best matches your speakers and tastes. We suggest also experimenting with speaker placement now that the "system" has changed. Another very important area for experimentation is acoustic treatment. All too often a good system will sound mediocre due to acceptance of the surface treatments. Usually a mix of a little broadband absorbtion and diffusion is a major improvement. Carpet and other thin treatments only absorb highs and can "unbalance" a system.

SE/PP 300B specifications

Manley Laboratories is renowned for its commitment to high-quality audio engineering, and the SE/PP 300B amplifier exemplifies this dedication. This powerful vacuum tube amplifier is designed for audiophiles who demand the best in sound quality and performance.

One of the main features of the SE/PP 300B is its ability to operate in both Single-Ended (SE) and Push-Pull (PP) modes. This versatility allows users to experience the distinctive sonic character of both configurations. Single-ended operation is known for its rich and warm sound, whereas push-pull offers greater power efficiency and reduced distortion. The ability to switch between these modes gives the SE/PP 300B a unique edge, allowing users to tailor their listening experience to their preferences.

The heart of the SE/PP 300B lies in its use of the 300B vacuum tube, famous for its musicality and smooth tonal characteristics. These tubes are celebrated for their warm midrange and natural articulation, making them ideal for a wide range of musical genres. The design of the amplifier ensures that these tubes operate in an optimal manner, contributing to an overall performance that is both dynamic and refined.

Manley's engineering team has incorporated advanced technologies to enhance performance. The SE/PP 300B features a high-quality power supply that minimizes noise and maximizes headroom. This ensures that the amplifier maintains its integrity even at high volume levels. Furthermore, the use of high-grade capacitors and transformers helps achieve a rich soundstage with intricate detail and depth.

Another significant characteristic of this amplifier is its user-friendly design. With straightforward input and output options, as well as easy access to the tube sockets, users can effortlessly service the unit if needed. The aesthetic of the SE/PP 300B is also noteworthy, sporting a classic look that harks back to the golden age of audio while incorporating modern finishing touches.

In conclusion, the Manley Labs SE/PP 300B is a versatile and highly regarded vacuum tube amplifier that marries classic audio traits with contemporary engineering. Its ability to operate in both Single-Ended and Push-Pull modes, combined with the legendary sound of the 300B tubes, positions it as a flagship offering for those who appreciate and seek the highest quality in audio reproduction. Whether for casual listening or serious audiophile pursuits, the SE/PP 300B promises to elevate any audio experience.