Preamplifiers — Lamm Industries LL1.1 Signature
Description, images, technical data and specifications
Lamm Industries LL1.1 Signature
Image source — © Lamm Industries
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Specifications
Model name
LL1.1 Signature
Analog inputs (balanced)
N/A
Analog inputs (single-ended)
1
Analog outputs (balanced)
1
Analog outputs (single-ended)
1
Gain (dBu)
N/A
Input sensitivity (mV)
N/A
Output voltage (V)
N/A
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
16 500
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Maximum output level (balanced) (dBu)
N/A
Maximum output level (single-ended) (dBu)
N/A
Volume control range (dBu)
N/A
Frequency response low +/- 3dB (Hz)
5
Frequency response high +/- 3dB (Hz)
140 000
Signal to Noise Ratio (SNR, unweighted) (dB)
105
Total Harmonic Distortion + Noise (THD+N) (%)
0.03
Dimensions (mm)
11.4 × 48.2 × 35.2
Weight (kg)
16.2
Official link
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The L2.1 Reference is based on a Class A circuit from input to output without general negative feedback. All cascades, including the high—voltage output, are single-cycle. Selected high-voltage transistors (MOSFETs) are used in the signal path, and the volume control is implemented on a high-quality TKD step potentiometer (Tokyo Ko-on Denpa).
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Lamm Industries LL2.1
The LL2.1 has a topology that provides the most natural sound in an audio channel using pure Class A operation from input to output; all cascades are single-circuit. The preamp's sound-neutral power supply is equipped with a full-wave vacuum rectifier.
