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.<\/p>\n
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.<\/p>\n
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.<\/p>\n
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).<\/p>\n
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.<\/p>\n
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.<\/p>\n
In terms of specifications, it is a class A amplifier with 2x30W RMS, 1% THD at 1kHz.<\/p>\n
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 100k\u03a9, and it can connect to load impedances of 4\/8\/16\u03a9. As for connections, it has 3 line inputs RCA (pair), 1 pre-in input and 2 screw terminals compatible with banana plugs.<\/p>\n
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.
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| SPECIFICATIONS<\/th>\n<\/tr>\n | |||
|---|---|---|---|
| Type<\/td>\n | Single-End tube amplifier in class A, 2x30W<\/td>\n<\/tr>\n | ||
| Tube<\/td>\n | Input stage: 2x 12AX7 \nDrive tubes: 2x 300B, 2x 310A \nPower stage: 2x 845 \" single-ended \"<\/td>\n<\/tr>\n | ||
| THD<\/td>\n | 1% (1kHz)<\/td>\n<\/tr>\n | ||
| Signal-to-noise ratio<\/td>\n | 87dB (weighted A)<\/td>\n<\/tr>\n | ||
| Frequency response<\/td>\n | (-1.5dB): 10 - 50,000 Hz<\/td>\n<\/tr>\n | ||
| Sensitivity<\/td>\n | 220 mV (Built-in Mode)<\/td>\n<\/tr>\n | ||
| input impedance<\/td>\n | 100k\u03a9<\/td>\n<\/tr>\n | ||
| Charging impedance for loudspeakers<\/td>\n | 4\/8\/16\u03a9<\/td>\n<\/tr>\n | ||
| Inputs<\/td>\n | 3 pairs of RCA inputs \n1 Pre-in \nSpeaker terminals for both shovels and bananas<\/td>\n<\/tr>\n | ||
| In the box<\/td>\n | 2 fuses \nRemote control \nPower cable \n1 dedicated cable for connection between pre- and final stage \nManual<\/td>\n<\/tr>\n | ||
| Size<\/td>\n | Amplifier unit: 435 x 460 x 456 mm \nOutput unit: 435 x 160 x 456 mm<\/td>\n<\/tr>\n | ||
| Total weight<\/td>\n | 62Kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"LM-845 Premium: two-part and 2x30W<\/h3>\nIt is a Class A single-end design with 219 tubes as the drive tube and 845 tubes for the power stage. A two-piece amplifier is very useful when you need to move it.\u00a0<\/p>\n
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