MBL C51

Second-hand, in mint condition, without scratches. Supplied with its remote control and its original package.

Integrated amplifier

The system’s heart or motor, the amplifier, has a special role to play as it carefully “amplifies” the delicate musical signal and controls the loudspeaker, enabling all pieces of musical information to be bundled into a meaningful whole. The C51 provides the strong-hearted foundation of a simpler system by carefully combining the functions of the preamp and amplifier in one elegant chassis. No compromises here, discrete components fill the input section, our trail-blazing LASA technology provides a powerful and efficient amplifier…MBL to its core.
For optimum channel separation and a distinct, true-to-life musical image, MBL have crafted the input stages from carefully selected discrete components. Full listening pleasure in half the space.


General
The system’s heart or motor, the amplifier, has a special role to play as it carefully “amplifies” the delicate musical signal and controls the loudspeaker, enabling all pieces of musical information to be bundled into a meaningful whole. The C51 provides the strong-hearted foundation of a simpler system by carefully combining the functions of the preamp and amplifier in one elegant chassis. No compromises here, discrete components fill the input section, our trail-blazing LASA technology provides a powerful and efficient amplifier…MBL to its core.
For optimum channel separation and a distinct, true-to-life musical image, MBL have crafted the input stages from carefully selected discrete components. Full listening pleasure in half the space.


General
Weight
23 kg / 50.7 lbs

Dimensions (without cables)
W 45,0 cm / D 44,5 cm / H 14,5 cm

Dimensions with packaging
W 59,0 cm / D 54,0 cm / H 35,5 cm

Line Voltage
230 Vac / 50 Hz or 115 Vac / 50/60 Hz
(single voltage, factory setting depending on country)

Power consumption
in stand by -< 0.5 VA
in idle – < 70 VA
Maximum – < 1000 VA (w. 2 x 300 W @ 4 Ohm)

Connections
Inputs
RCA unbalanced
2 x MBL CD1 / CD2
2 x Tuner AUX1 / AUX2
1 x Processor By-Pass

XLR balanced (unity gain)
1 x Symmetrical

Options
1 x optional 2nd Symmetrical In (XLR) or
1 x optional Phono Module (RCA)

Outputs
RCA unbalanced
1 x Variable Out
1 x Fixed Record Out

Loudspeaker
1 x pair Loudspeaker Binding Posts

Other
Ground Terminal
2 x MBL SmartLink

Preamplifier Section
Output Level / Maximum Output
Variable unbalanced RCA Outputs
0 … 5 V @ 2 V Input, max 1.7 V *1 (According to Volume Setting)
*1: Input Voltage for Rated Power

Fixed Record Output
2 V @ 2 V Input, max. 8 V

Nominal / Maximum Input Level
(All Inputs except Phono)
2 V / 8V (According to Volume Setting)

Absolute Polarity
In-Phase (RCA / XLR Pin2)
DC – > 200 kHz

Frequency Range
(All Inputs and Outputs except Phono)
DC – > 200 kHz

Output Impedance
All RCA Outputs 100 Ohm

Input Impedance
CD and Processor By-Pass Inputs
? 5 kOhm

AUX Inputs
50 kOhm

XLR Input
10 kOhm

Signal to Noise Ratio
(All Inputs and Outputs except Phono)
> 110 dB (A) @ 2 V Input, Volume set to 0 dBr / unity gain

Channel Separation
(All Inputs and Outputs except Phono)
> 100 dB @ 1 kHz

Total Harmonic Distortion + Noise
(All Inputs and Outputs except Phono)
< 0.001 % @ 2V Input / 1kHz, Volume set to 0 dBr / unity gain

Power Amplifier Section
Rated Power
Stereo 4 Ohm
2 x 300w

Stereo 8 Ohm
2 x 180w

Stereo 2 Ohm
2 x 400w

Peak Output Voltage
62 Vp

Peak Output Current
20Ap

Input Sensitivity (RCA / XLR)
100 mV for 1 W @ 4 Ohm

Rated Input Voltage (RCA / XLR)
1.70 V for 300 W @ 4 Ohm

Voltage Gain
20 (26 dB)

Absolute Polarity
In-Phase

Signal / Noise Ratio @ Rated Output
122 dB (A) @ 300 W / 4 Ohm

Signal / Noise Ratio @ 1 Watt
98 dB (A) @ 1 W / 4 Ohm

Equivalent Input Noise
124 dB (A) @ 2 V Input

Frequency Response
< 10 Hz – 45 kHz

Distortion THD+N
Typ. 0.01 % @ 3 W from 20 Hz … 20 kHz

Damping Factor
> 100 (40 dB) @ 1 kHz / 4 Ohm

Channel Separation
> 90 dB @ 1 kHz