The Line Magnetic LM-845 Premium is a high quality, integrated tube amplifier that uses 845 triode tubes in a single-ended design and operates in pure Class A mode. It delivers a power output of 2x30W, making it suitable for use with most existing reference speakers.
The result of years of research on the 845 triode single-ended design, the LM-845 Premium is quickly becoming a reference in the world of high-end amplifiers, thanks to its exceptional design and manufacturing quality.
The unit consists of two parts: an amplifier unit and an output unit. The amplifier uses Shuguang 300B tubes in its drivers, a 310A for the amplifier, and Shuguang 12AX7 tubes in the pre-amplifier. It also has two user controls for the 300B and 845 tubes used for bias adjustment and two front panel meters for easy bias monitoring. A negative feedback switch on the front panel allows users to select between two levels of NFB to vary the audio outputs.
The LM-845 Premium also uses eight transformers for power supply, filtering, switching and output. Its construction boasts high-quality components, point-to-point wiring and a single-ended design. It comes with tubes for the input stage (2x 12AX7), drivers (2x 300B, 2x 310A) and power stage (2x 845 single-ended).
In addition to its technical merits, the LM-845 Premium features a handcrafted design with fine point-to-point wiring, bias control available at the top of the amplifier panel with a true ammeter, and a soft start and delay circuit. It also features a specially designed EI transformer for power supply and two wide bandwidth EI output transformers. The unit uses an ALPS volume control and Realcap capacitors.
In terms of user interface and convenience, it has a removable pipework protection grid and comes with an infrared remote control. It also includes a detachable power cable, a dedicated cable used to connect the main amplifier unit to the output unit, and a manual.
In terms of specifications, it is a class A amplifier with 2x30W RMS, 1% THD at 1kHz.
and a signal-to-noise ratio of 87dB (A-weighted). Its frequency response ranges from 10 - 50,000 Hz with a -1.5dB section, and it has a sensitivity of 220mV in built-in mode. The input impedance is 100kฮฉ, and it can connect to load impedances of 4/8/16ฮฉ. As for connections, it has 3 line inputs RCA (pair), 1 pre-in input and 2 screw terminals compatible with banana plugs.
The dimensions of the amplifier unit are 435 x 460 x 456 mm, and the output unit measures 435 x 160 x 456 mm. Overall, the dimensions are 435 x 620 x 456 mm, with a total weight of 62 kg.
| SPECIFICATIONS |
| Type |
Single-End tube amplifier in class A, 2x30W |
| Tube |
Input stage: 2x 12AX7
Drive tubes: 2x 300B, 2x 310A
Power stage: 2x 845 " single-ended " |
| THD |
1% (1kHz) |
| Signal-to-noise ratio |
87dB (weighted A) |
| Frequency response |
(-1.5dB): 10 - 50,000 Hz |
| Sensitivity |
220 mV (Built-in Mode) |
| input impedance |
100kฮฉ |
| Charging impedance for loudspeakers |
4/8/16ฮฉ |
| Inputs |
3 pairs of RCA inputs
1 Pre-in
Speaker terminals for both shovels and bananas |
| In the box |
2 fuses
Remote control
Power cable
1 dedicated cable for connection between pre- and final stage
Manual |
| Size |
Amplifier unit: 435 x 460 x 456 mm
Output unit: 435 x 160 x 456 mm |
| Total weight |
62Kg |
