LS28

Audio Research

2 offers available: $34.85–$8000.00
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LS28 Comparison

LS28 in New Condition
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Replacement Remote for AUDIO RESEARCH R1, LS2BMKII, 70027010, LS28IIWH Details$34.85Condition is New, Replacement Remote for AUDIO RESEARCH R1, LS2BMKII, 70027010, LS28IIWH, shipping cost = $4.6999.6%
Audio Research LS28 Preamplifier (Silver, 220V), Made in USA Details$8000.00Condition is New, Audio Research LS28 Preamplifier (Silver, 220V), Made in USA, shipping cost = $250.0099.2%
LS28 AUDIO RESEARCH Preamplifier

The Audio Research LS28 Line Stage Preamplifier in black is a masterpiece of audio engineering, meticulously designed to deliver a pure and unadulterated listening experience. This sleek, black preamplifier boasts a timeless design, blending seamlessly into any home audio setup while providing an exceptional level of sonic performance.

At its core, the LS28 is a line-level only preamplifier, meaning it doesn't include a built-in phono stage. However, its exceptional performance in amplifying line-level audio signals from sources like CD players, tuners, and digital processors makes it an indispensable component in high-fidelity audio systems.

The LS28's circuit topology is a testament to Audio Research's commitment to refinement and sonic purity. It features a fully discrete, class-A design, which means every component in the signal path is an active element, working in perfect harmony to preserve the integrity of the audio signal. The use of high-quality, hand-selected components, such as both silver and gold vacuum tubes, further enhances the LS28's ability to deliver a rich, nuanced sound with exceptional clarity and detail.

The preamplifier's front panel is a minimalist's dream, featuring just the essential controls: volume, balance, source selection, and a power switch. The volume control is a high-quality, ALPS potentiometer, providing smooth and precise adjustments in 0.5dB increments. The source selection switch allows you to easily switch between up to seven different audio sources.

The LS28's rear panel offers a range of inputs and outputs to accommodate various sources and amplifiers. It includes six line-level inputs, two tape monitor inputs, and a tape output. There are also two sets of outputs: one for power amplifiers and another for recording or monitoring purposes.

The Audio Research LS28 Line Stage Preamplifier in black is more than just a component; it's an invitation to rediscover the joy of listening to music in its purest form. With its timeless design, exceptional performance, and unwavering commitment to sonic purity, the LS28 is an investment in the heart of your music collection.

The Audio Research LS28 preamplifier is a high-end audio component known for its excellent sound quality and build quality. Here are some pros and cons that might help you make an informed decision about purchasing this preamplifier:

Pros:

1. Superior Sound Quality: The Audio Research LS28 delivers exceptional sound quality with a natural, detailed, and engaging sound. It has a wide and open soundstage with clear and precise imaging.

2. Build Quality: The preamplifier is built to last with high-quality components and a solid construction. It has a sleek and elegant design that will look great in any home audio setup.

3. Versatile Connectivity: The LS28 offers a range of connectivity options, including balanced and single-ended inputs and outputs, as well as a phono input for turntables.

4. Flexible Control: The preamplifier offers flexible control options, including a front-panel volume knob, a remote control, and an app for smartphone control.

5. Upgradability: The LS28 is part of Audio Research's Line Stage series, which means it can be upgraded with newer modules and features as they become available.

Cons:

1. High Price: The Audio Research LS28 is a high-end preamplifier, and its price tag reflects its premium features and build quality. It may be out of reach for some budgets.

2. Complex Setup: Setting up the LS28 may require some technical expertise, as it offers a range of options and configurations. It may not be the best choice for beginners or those who prefer a simpler setup.

3. Limited Power: The preamplifier does not provide enough power for driving powerful speakers directly. It is best used in conjunction with a separate power amplifier.

4. No Digital Connectivity: The LS28 does not offer any digital connectivity options, which may be a drawback for those who prefer to use digital sources.

Conclusion:

The Audio Research LS28 is a high-end preamplifier that delivers exceptional sound quality and build quality. It offers a range of connectivity options, flexible control, and upgradability, making it a great choice for audiophiles and serious music enthusiasts. However, its high price tag, complex setup, limited power, and lack of digital connectivity may be drawbacks for some. Ultimately, the decision to purchase the LS28 depends on your budget, audio preferences, and technical expertise.

Recommendation:

If you are looking for a high-end preamplifier with superior sound quality and build quality, the Audio Research LS28 is an excellent choice. However, it may not be the best option for those on a tight budget or for those who prefer a simpler setup. If you are unsure about the technical aspects of setting up and using the LS28, it may be worth considering a more user-friendly and affordable alternative. Alternatively, if you require digital connectivity or more power, you may want to consider a different preamplifier model that better fits your needs.

Details:

Record out XLR and rca connectors. A black anodized finish is optional. Using the front panel buttons and rotary dial, settings can easily be changed. The features are auto shutdown, processor mode, tube hours, display brightness, volume reset and input naming.

The circuit does not invert phase. It can be set for one to eight hours or it may deactivated. Specifications. Power supplies: electronically regulated low and high voltage supplies.

Processor mode is a fairly common feature on pre-amps today. Audio reference LS28 preamplifier-black: liquid error: index was out of range. Dimensions: width height depth. Input naming provides a selection of names that can be assigned to each input allowing for easier identification the various outputs.

The power supply, which is fully regulated takes up half of the chassis. Rounding out the rear panel is a power connector and fuse holder. Two rotary knobs flank the front panel but unlike previous products, left knob selects eight inputs and right controls volume through an impressive 103-step microprocessor. This output provides a fixed-level signal to which ever set of inputs are selected.

The LS28 vacuum tube line stage measures 6.5 x 19 13.7 w and weighs 15.9 pounds. Directly below the display are six push buttons labeled power, menu, enter, mono, invert and mute. Push buttons: power, menu, enter, mono, invert, mute. Output polarity: non-inverting.

Display brightness offers six different settings, including off for the florescent display. Assignable processor pass through. The solidly built remote mirrors all of the front panel functions. Warm-up/ brown-out mute.

The rear panel is nicely laid out and everything clearly labeled. Styling is comparable to past arc products with a silver chassis and face plate black panel which contains the green florescent display. As noted above, these functions may also be changed from the remote. Includes original factory packaging, power cord, manual, silver metal remote.

Some orders are shipped signature required. The menu function allows the user to adjust various features of LS28. The auto shutdown feature is designed to turn the pre-amplifier off after a period of inactivity. Just in on trade.

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