Bridged and Parallel Modes

The S1500 / S2000 provides a rear-panel switch that allows it to be used in either a Bridged or Parallel mode. When this switch is placed in the “STEREO” (center) position, the S1500 / S2000 functions as a true stereo amplifier, where both of the two independent amplifier channels (Channel 1 and Channel 2) can receive different input signals and produce independent output signals. However, when the switch is placed in the “BRIDGED” (left) position, the Channel 1 inputs signal is routed to both power amplifiers bridged together, producing a single output signal with a true 1500 watt output into a single 8 ohm channel (in the case of the S1500) or a true 2000 watt output into a single 8 ohm channel (in the case of the S2000).

WARNING: Bridged mode is to be used only when the S1500 / S2000 is connected to an 8 ohm speaker load. Use of Bridged mode with speaker loads of 4 ohms or less can result in severe damage to the unit due to excessive heat and current limiting and will void your warranty!

BRIDGED PARALLEL

STEREO

Bridged Mode

The illustration on the right shows how this works. In Bridged mode, the polarity (phase) of the Channel 2 output signal is reversed relative to that of the Channel 1 output signal. Both channels then process the same input signal, with the speaker load connected so that power is derived from both channels. The effective voltage swing seen by the load is thus doubled, so that the power output is doubled.

When using the S1500 / S2000 in Bridged mode, be sure to connect your loudspeaker as shown in the illustrations on page 9 (and as silkscreened on the rear panel), with the red (+) terminal of the Channel 2 output connected to the negative input of the speaker and the red (+) terminal of the Channel 1 output connected to the positive input of the speaker. Do not use the black ground (-) output terminal of either channel (the speaker load must “float” away from the amplifier chassis).

When the rear panel switch is placed in the right “PARALLEL” position, the S1500 / S2000 operates in a unique Parallel mode. In this mode, only the signal present at the Channel 1 input is used (and only the Channel 1 input control is functional). This signal is then routed to both the Channel 1 and Channel 2 power amplifiers, thus producing a dual mono output, with 750 watts per channel into 4 ohms (in the case of the S1500) or 1000 watts per channel into 4 ohms (in the case of the S2000).

See pages 8 - 9 in this manual for interconnection diagrams when using the S1500 / S2000 in Bridged or Parallel modes

INPUT

CHANNEL 1(+) OUTPUT

CHANNEL 2(+) OUTPUT

S2000, S1500 specifications

The Samson S2000 and S1500 are renowned headphone amplifiers that have gained popularity among audio enthusiasts for their superior performance and technological innovations. Both models embody Samson's commitment to high-quality, reliable audio solutions suitable for both professional and home studio environments.

The Samson S2000 is designed to provide high-quality sound amplification for professional-grade headphones. It offers an impressive output power of 2000mW per channel, ensuring that even high-impedance headphones can achieve full performance. One of its standout features is the incorporation of a low-noise, high-performance amplifier, which delivers clean, distortion-free sound across a broad frequency range. The S2000 includes a front-panel volume control that provides precise adjustment, making it easy for users to find the right listening level in any environment. Additionally, it features two headphone outputs, allowing multiple listeners to enjoy audio simultaneously, which is particularly useful in collaborative settings.

On the other hand, the Samson S1500 incorporates similar high-quality engineering but is designed with slightly more compact dimensions and output specifications. The S1500 provides 1500mW per channel, showcasing ample power for a variety of headphone types. This model also includes a front panel volume pot and a headphone output switch to select between two headphone outputs. A significant feature of the S1500 is its low-frequency extension, providing richer bass response ideal for those who appreciate depth in their audio experience. The S1500 incorporates advanced thermal management technology to ensure stable operation and prevent overheating, a crucial consideration for long listening sessions.

Both the S2000 and S1500 are equipped with ¼-inch and 1/8-inch inputs, making them adaptable to a wide range of audio sources. They utilize a robust, solid metal chassis designed for durability and reduced vibration, enhancing overall audio fidelity and ensuring longevity. Additionally, both models feature a sleek design, making them visually appealing in any setup.

In summary, the Samson S2000 and S1500 headphone amplifiers exemplify top-notch design, functionality, and power optimization for audio professionals and enthusiasts alike. Their combination of innovative technologies, robust output capabilities, and user-friendly features make them exceptional choices for anyone looking to enhance their listening experience.