- Written by John E. Johnson, Jr.
- Published on 08 July 2010
- Lamm LL1 Signature Stereo Tube Preamplifier - An Audiophile's Dream
- Page 2: The Design of the Lamm LL1 Signature Preamplifier
- Page 3: The Lamm LL1 Signature Preamplifier In Use
- Page 4: The Lamm LL1 Signature Preamplifier On the Bench
- Page 5: Conclusions About the Lamm LL1 Signature Preamplifier
- All Pages
Vladimir Lamm has been designing tube-based audio components most of his life. Part of that career was in the (then) Soviet Union, and continued when he moved to the USA. The company, Lamm Industries, is based in New York.
Lamm Industries does not come out with new models every year like many companies do. The reason is simple. Each product has so much effort put into the design, testing the effect of changing the value of small parts here and there, the result is a product that cannot be improved upon. So, if you look at the product list on their website, the models originate over the years and are still available. Each one is hand built, but they don't have a warehouse with boxes of the preamps and power amps sitting around waiting to be sold. They have a non-interruptible production cycle based on statistical sales data over the years. After building a product, it is burned in for several days, and the consumer is urged to burn it in additionally when it is installed.
Not all of the Lamm products are really expensive compared to other high end components from various companies, but none of them are "entry level" either. Every product is the best it can be, within the cost constraints of that product.
- Design: Pure Class A Single-Ended Triode Preamplifier, Each Channel Contained within Two Chassis
- Tube Compliment for Each Channel: Four 6H30 Dual Triodes, Two 6X4 Rectifiers
- Maximum Output: 50 Volts RMS Each Channel
- MFR: 20 Hz - 20 kHz, -0.1 dB
- THD+N: 0.03% at 1 Volt Output
- S/N: 87 dB at 2 Volts Output
- Input Impedance: 16.5 kOhms
- Output Impedance: 200 Ohms
- Inputs: RCA
- Outputs: XLR (Pin 3 Not Connected) and RCA
- Dimensions (Each Chassis): 4.5" H x 19" W x 14.2" D (Including Front Handles)
- Weight: 35.8 Pounds (Each Preamplifier Control Chassis), 21.2 Pounds (Each Power Supply Chassis)
- MSRP: $42,690 USA
- Lamm Industries
We have reviewed several Lamm units over the years, including the M2.2 Monoblock Power Amplifier, which is hybrid in design (tube used as the second stage, solid state input and output stage), the L2 Reference Stereo Preamplifier, which is also hybrid. Most recently, we reviewed the LL2.1 Stereo Preamplifier. It is an all-tube (including the rectifier) Pure Class A, single-ended, single-chassis preamp.
The LL1 is also an all-tube, Pure Class A, single-ended preamplifier. It does not use any negative feedback. However, it is like nothing ever seen before in the preamp arena. It is comprised of four chassis, with each channel having its own power supply chassis and control chassis, with a combined weight of 114 pounds. That's heavier than most power amplifiers.