Mark Levinson No.23 Dual Mono Solid State Amplifier, 200W

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Wonderful amplifier from Mark Levinson's golden era when they were at their highest quality, craftsmanship, and musicality.  

Like most Mark Levinson amplifiers from this era the No 23 needed little to no attention from our in-house technical staff.

Just a quick dusting and a test under full power where it performed like the day it left the factory. Wish we could say the same for the next generations amps which require a full recap what seems to be 100% of the time.

This example is super clean where you will have a hard time finding really any signs of use. To top it off we have the original shipping carton and packaging! 

This amp is compact but super heavy, so please be prepared to gather some help to get it into place in your system.

The back features both balanced inputs and CAMAC style inputs, which are a more sophisticated version of an RCA jack. In case you don't have a matching ML preamp, we'll include a set of RCA to CAMAC adaptors for your convenience. 

Ideally this amp would be connected with balanced XLR cables. 

You'll also find a standard set of speaker terminals, and a removable electrical plug and fuses for each channel reflecting the fact that it's a dual monaural amp. 

200W of output will allow you to power most speakers, vintage and modern, with authority and ease.  

Some notes from our lab:
• Single ended tested with CAMAC adapters
• Balanced tested
• Both channels balanced and test clean well above rated 200W into 8 ohms
• Listening test pass 

Click below to add our recommended matching cables from Kimber Kable, all brand new as SkyFi is an official Kimber dealer.

Kimber Kable - RCA Interconnects

Kimber Kable - XLR Interconnects

Kimber Kable - Speaker Cables

Kimber Kable - Power Cords

Specifications:
Rated Power:
Minimum continuous sinewave power, from 20-20kHz, with no more than 0.3% THD (FTC)
8 Ohms - 200 watts
4 Ohms - 400 watts
2 Ohms - 700 watts

Input Impedance:
50k ohms shunted by 1.5nF

Sensitivity (EIA):
141 mV

Voltage Gain:
26 dB

Power Consumption:
Typically 500 Watts

Overall Dimensions:
Height - 8.4" (212.3 mm)
Width - 17.5" (444.5 mm)
Depth - 22.1" (560.2 mm)

Shipping Weight:
90 Lbs
(40.9 kg)

The SkyFi Testing Process for Solid State Amplifiers:
We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage.

We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally, we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If everything reads clean, we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier then remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will be also be tested.

Final testing involves pushing actual music thorough the amplifier. We've learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage KEF speakers that we're very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice.