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Audio Research LS28SE Line-Stage
LS28SE Line-Stage
A high-end preamplifier in its technical performance. An instrument in its ability to deliver a realistic and emotional connection to the music.
The LS28SE draws on Audio Research’s experience creating, of all things, our Reference 160-series power amplifiers. Numerous costly component upgrades elevate the LS28SE’s clarity, resolution, transient snap, and sense of space. The relaxed purity and natural sense of balance are instantly noticeable and will inspire extended listening sessions.
Flexible operation
The LS28SE line stage offers flexible and intuitive operation. Four balanced and four single-ended inputs, and two sets of both balanced and single-ended outputs allow maximum connectivity. Input naming, tube hours, auto shutdown, and the assignment of home theater passthrough are all easily directed through the menu. Phase invert and mono are also standard functions.
The impact of a great preamplifier on your music system must not be ignored.
While loudspeakers and power amplifiers are obviously critical to the sound you hear, preamplifiers are often underestimated. Musical stones lay unturned because most preamps do not stand up to the caliber of the system in which they reside. Enter LS28SE. Its organic tone and inner detail bring an instant vitality and refinement to systems formerly employing other preamplifiers.
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Professional Reviews 93/100
Deliciously Crispy
Sound Quality
96/100
Build Quality
87/100
Features Connectivity
93/100
Value for Money
90/100
With near-dead neutrality, exceptional clarity, and finely etched imaging, the LS28SE brings a reference-grade sense of control to serious systems. Part Time Audiophile praised its textured, open presentation, while Best of High End highlighted the added resolution, transient snap, and relaxed purity that make long sessions so compelling.
What Reviewers Are Saying
Pros
Delivers highly transparent, neutral sound with excellent clarity and textural detail.
Produces strong imaging and a convincing sense of space, with impressive openness.
Offers an unusually complete feature set for a purist line stage, including balanced and single-ended I/O, mono, phase invert, home theater bypass, and input naming.
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Cons
Does not aim for lush tube warmth, theatrical bass, or obvious sonic coloration.
Its revealing nature can expose weaknesses in upstream gear, so it works best in a serious reference system.
SOUND QUALITY PERFORMANCE 96/100
Reviewers repeatedly praise the LS28SE for exceptional clarity, resolution, and transparency, with one describing it as more than merely transparent and another highlighting improved clarity, resolution, transient snap, and a relaxed purity. The overall sonic character is mostly neutral and highly refined, with strong openness up top and an unusually articulate, textural presentation that still avoids sounding mechanical.
Transparency Resolution
97/100
This is where the LS28SE draws the strongest praise. Reviewers call out abundance of clarity and detail, describe it as transparent and nearly dead neutral, and say its openness, refinement, and low-level texture make lesser preamps sound less revealing.
Tonal Balance Musicality
94/100
The tonal balance is described as basically truthful and ultra-refined, with a little extra attention drawn to the treble and no attempt at warmth for its own sake. Reviewers note that it does not do dark, chocolatey midrange or party-bass coloration, but they frame this as a deliberate, controlled presentation rather than a flaw.
Dynamics
95/100
Dynamic behavior is consistently praised through language about transient snap, control, and the way the preamp steers a system toward clarity and openness. The reviews suggest strong rhythmic ease and confidence rather than compression or softness.
Soundstage Imaging
96/100
Spatial performance is described as excellent, with a strong sense of space and imaging that stands out in the reviewer system. The stage is presented as expansive and well organized, helping the LS28SE separate detail cleanly without blurring image focus.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
87/100
Reviewers describe a classy, well-finished chassis with clean lines and a thoughtfully executed front panel, and they also mention the upgraded coupling caps and regulated power supplies. There is praise for the design approach, though the coverage is more about tasteful execution than heavy-duty construction bravado.
Features Connectivity
93/100
The LS28SE is very well equipped for a line stage, with four balanced and four single-ended inputs, balanced and single-ended outputs, tape record out, home theater bypass, mono and phase invert functions, tube-hour indication, and input naming. That is a notably complete feature set for a purist-oriented preamp.
Value for Money
90/100
Reviewers acknowledge that it is expensive, but they also say that at this level they would be hard pressed to find much under the asking price that comes close, and one explicitly says the price never felt unreasonable for the sound quality. In the context of other high-end line stages, the comments frame it as justified rather than extravagant.
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Verified Dealers
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Authorized dealers for Audio Research LS28SE Line-Stage
- 110Hz — online and in-store — Kielce, Województwo świętokrzyskie, Poland (website)
- 3mA Audio — online and in-store — Houston, Texas, United States (website)
- Absolute Sounds — in-store — London, England, United Kingdom (website)
- Alpha High End — online and in-store — Brasschaat, Vlaams Gewest, Belgium (website)
- Ambiance Concert — in-store — Angers, Pays de la Loire, France (website)
- American Sound — in-store — Richmond Hill, Ontario, Canada (website)
- Area Hifi — online and in-store — L'Eixample, Comunidad Valenciana, Spain (website)
- Aris Audio — in-store — Salt Lake City, Utah, United States (website)
- Audible Images — in-store — Melbourne, Florida, United States (website)
- Audio Advice — online and in-store — Raleigh, North Carolina, United States (website)
and 94 more verified dealers