Lamm Industries LL2.1 Preamplifier
The Lamm Industries LL2.1 pairs crystal-clear treble, deep bass authority and effortless transient headroom in a focused pure Class A tube design. John E. Johnson, Jr. found exceptional detail and graceful instrumental nuance, while the Direct input and 15dB gain trim make this an unusually adaptable purist preamp for revealing two-channel systems.
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Nicely Roasted
Sound Quality
91/100
Build Quality
87/100
Features Connectivity
84/100
Value for Money
91/100
Pros
Exceptionally clear, extended presentation with crisp treble detail, deep bass and fine instrumental nuance.
High output capability supports unstrained transient peaks and demanding musical dynamics.
Direct input, two output pairs, tape loop and 15dB attenuation provide useful system-matching flexibility.
Cons
Single-ended RCA-only connectivity limits suitability for systems requiring balanced connections.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 91/100
The LL2.1 is described as exceptionally open, extended and composed, combining crystal-clear treble, substantial bass and a graceful handling of instrumental nuance. The review also found unusually strong measured linearity and output headroom, although it offers little direct commentary on stereo imaging.
Transparency Resolution
95/100
John E. Johnson Jr. found the top end “crystal clear” and said the LL2.1 made it obvious that all the information on the recording was coming through. The crisp, detailed crack of a whip and the delivery of “every nuance” from each instrument point to outstanding clarity and low-level resolution.
Tonal Balance Musicality
94/100
Unlike tube components that can soften the frequency extremes, the LL2.1 was reported to retain clear treble extension and deep bass with no apparent loss. Its presentation of instrumental detail was described as graceful and effortless rather than analytical or forced.
Dynamics
92/100
The reviewer's measurements showed exceptionally high output capability before clipping, and he concluded that the preamplifier would not falter when transient peaks demand voltage. This supports a lively, unfettered sense of dynamic headroom, from string plucks to large-scale orchestral bass-drum strikes.
Soundstage Imaging
82/100
The review provides little direct discussion of stage width, depth, image placement or layering. Its praise for instrumental nuance and ease suggests a coherent presentation, but spatial performance is not examined in enough detail to make stronger claims.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
87/100
The LL2.1 uses a dual-mono, pure Class A, single-ended tube circuit and heavy copper RCA connectors with gold plating. The reviewer also praised the deliberately simple internal layout and short signal path, though there is little commentary on long-term durability or finish quality.
Features Connectivity
84/100
Connectivity includes three single-ended stereo inputs, including a Direct input that bypasses the gain stage, plus a tape loop and two parallel single-ended output pairs. The 15dB gain-reduction attenuator is useful for system matching, but there are no balanced connections, onboard phono stage, headphone output or conventional listening-volume remote.
Value for Money
91/100
At $5,690 for the Standard version and $5,990 for the Deluxe version, the LL2.1 was a costly specialist preamplifier. However, the reviewer explicitly felt buyers received “a little more than you pay for,” finding its performance to justify the premium against similarly ambitious high-end alternatives.
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Professional reviews and sources for this product's Watt'n Potatoes analysis.
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Specifications
- Pure class A operation
- All stages are single-ended
- Dual-mono preamplifier with 3 inputs and 1 tape loop; 2 sets of single-ended outputs
- Connected in parallel
- Specification
- Two 12AU7A/ECC82 tubes
- Specification
- Two 6922/ECC88 tubes
- Specification
- One 6X4/6202 tube
- Audibly neutral power supply
- Featuring a full-wave VACUUM rectifier with a choke-containing filter, and one solid-state low-voltage analogue regulator used as the heater supply
- Specification
- Attenuator for gain reduction by 15 dB
- 1.5-400,000 Hz (-3dB)
- Frequency response
- Remote on/off switch
- For Lamm M1.2 Reference, M2.2, ML2.2 and ML3 Signature amplifiers
- Specification
- Operates on all world AC line voltages
- Height
- 4.5" (11.43cm)
- Width
- 19" (48.26cm)
- Depth
- 13.875" (35.25cm) Add 1.375 inches for front handles
- Weight
- 20lbs (9.1kg)
Manufacturer's Description — Lamm Industries
The Threshold of Excellence in Sound Reproduction
As the next generation of the original LL2 LAMM vacuum tube preamplifiers, a main distinction of the LL2.1 is its almost inaudible sonic signature. When connected to the right LAMM amplifiers, it recreates a three-dimensional soundstage in the comfort of your own home.
Design Elements
The LL2.1 features a topology that brings out the most natural sound performance in the audio path, employing a pure class A operation from input to output; all stages are single-ended. The preamplifier’s audibly neutral power supply features a full-wave vacuum rectifier. This rectifier, together with a choke-containing filter, helps reduce the hum and buzz to almost negligible levels and ensures a variety of dynamic range without coloration.
Other features include 3 inputs; 1 tape loop; 2 sets of outputs; front panel muting switch; attenuator for gain reduction by 15 dB; built-in remote on/off for LAMM power amplifiers; protection circuitry coupled with automatic mute at turn on/off.
Components
Each preamplifier is hand-crafted with the highest quality materials, including military grade low noise Dale metal film resistors; Noble potentiometers; Electrocube and Roederstein film capacitors; high frequency switching grade Cornell Dubilier electrolytic capacitors; and specially selected long life vacuum tubes. The LL2.1 features a custom-designed power transformer.
The LL2.1 is available in two versions: standard and deluxe, both of which utilize identical chassis, PC-board and parts.
In the deluxe version, the power supply energy storage is approximately twice that of the standard version (four identical light-blue capacitors next to the choke; only two of these are installed in the regular version — see first detail image insert).
Also, in the deluxe version, all film capacitors in critical pathways are situated next to polystyrene capacitors of the highest quality (see: yellow capacitors on two images — right and below).
Features
Unique topology
Brings out the most natural sound performance in the audio path
Standard and Deluxe models available
Deluxe model offers approximately twice the power supply energy storage as the Standard model. Additionally in the Deluxe model, all film capacitors in critical paths are paralleled by polystyrene capacitors of the highest available quality
Pure class A vacuum tube design
All stages are single-ended.
Drives any cable and any reasonable real world load
High-current drive capability, in combination with unique single-ended class A circuitry, allow the LL 2.1 to maintain its practically inaudible sonic signature.
Verified Dealers
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Authorized dealers for Lamm Industries LL2.1 Preamplifier
- Absolute Hi End — in-store — Ormond, Victoria, Australia (website)
- Ann Arbor Audio Design — in-store — Ann Arbor, Michigan, United States (website)
- Audioplus Hi End — in-store — San Benedetto del Tronto, Marche, Italy (website)
- gestalt FINE AUDIO — in-store — Nashville, Tennessee, United States (website)
- Innovative Audio Video — in-store — New York, New York, United States (website)
- Maestro Audio — in-store — Tel Aviv-Yafo, Tel Aviv District, Israel (website)
- Technology Factory — in-store — Antwerpen, Vlaanderen, Belgium (website)
- The Audio Beat — online (website)
- The Cable Company — online and in-store — New Hope, Pennsylvania, United States (website)
- USA Tube Audio — online and in-store — Phoenix, Arizona, United States (website)
