Luxman MB-3045 Tube Monoblock Amplifier Pair


For your consideration is a classic pair of original, unmolested, Luxman mono-block amplifiers. The 3045 is a classic tube design capable of incredible detail, authority, and holographic imaging.

These are in beautiful condition with very little signs of use. I have tested them thoroughly at full power without any issues or hiccups. The tubes have all been tested on my calibrated B&K 747 professional tube tester and pass with flying colors. They are complete and include the outer cages.

These amps use the desirable and original Luxman/NEC tubes and have not been converted to KT88s. These tubes are highly sought after.

Many feel the MB-3045 sounds way better that the McIntosh MC30’s and outperform them in every way. These were designed by the famed engineer Tim DeParavicini.

Amps will be carefully packed to ensure safe arrival in their original boxes. All tubes will be labeled, removed and packed separately.

I have multiple pairs of these so give me a ring if you need more than 2 for beaming or multiple system.

High-end tube amplifier representing Luxman's heyday in the mid 1970s which quite probably existed in fifty slightly different versions and also had LuxKit equivalents.

Primary is made of four windings wound together to reduce leakage and distortion inherent to Class AB or Class B amplifiers; the GX100-3.6 transformer can deliver more than 35W at 35Hz.

8045G power triodes
Specially developed in collaboration with NEC.

In Class B, the power dissipated on the plate can amount to 60W at 1Khz, thanks to its structure and high heat-dissipation metal.

Push-pull stage
Made of two 8045G triodes on which a negative feedback loop is applied.

DC driver stage
Of the cathode-follower type, uses newly developed 6240G double-triodes.

To rise the gain obtained by the driver stage, another 6240G double-triode is used here, with a 200V tension applied to the plate. A 5dB NFB is applied between the cathode and the 4th winding of the output transformer.

Differential amplifier
Its first stage uses a 12AX7 (ECC83) double-triode; the second stage, DC-coupled with the first, gives an out-of-phase signal which is sent to the driver stage.

Power-supply section
GX100-3.6 Quadra-Filar output transformer (specially developed for the 8045G), C1744 low resistance choke self, two 220µF electrolytic caps.

After this stage, the filtered tension is applied to a bridge rectifier.

The Luxman MB-3045s are relatively compact, measuring just 8.5 inches deep, 14 inches wide, and 6 inches tall.

The front panel has only a bright-orange power indicator (the lit vacuum tubes also indicate that the juices are flowing).

Around back, the configuration is relatively spartan: a simple barrier strip for speaker output, with 4-, 8-, and 16-ohm taps, a solitary RCA input jack and a level control, along with a two-prong power cord receptacle.

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