VTL (Vacuum Tube Logic) MB-1250 Wotan Monobock Tube Amplifiers - Massive Beasts!

$19,999

One of the most powerful tube amplifiers ever made rated at 600W in triode, and then 1250 WPC in tetrode mode... nope that's not a typo.

And we actually have two pairs of these available.

These are the only tube amps we have capable of driving our in-house reference Apogee Acoustics "Full Range" speakers. 

These came to us from a collector who took incredible care of his gear. Very low hours on the tubes and not a single scratch in sight.  

First manufactured in the mid 1990's, a set of these amps retailed for a whopping $25k in 1996 dollars and would cost over $41k today.   

They're dual chassis monoblocks weighing in at a hefty 240lbs. each.  These will ship to you in their original crates for safe transport using a nationally recognized freight courier. 

These are super rare and exclusive and are therefore priced accordingly.  

Our Testing Process for Amplifiers (Tube) at SkyFi:

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 tubes are inspected for signs of stress overheating or cracking.

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 it all looks 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 the 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 also be tested.

We also test all tubes for output gain and leakage on our calibrated B&K 747 tester against the original manufacturers specifications. If needed, the tubes will be replaced from our vast NOS (New Old Stock) vintage or modern inventory.

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.

Description: All-tube monoblock amplifier with class-AB1, push-pull output stage. Tube complement per side: twenty-four 6550s, one 12AT7, two 6350s. Output power (20Hz–20kHz into 5 ohms): 1250W tetrode (28.9dBW), 600W triode (25.75dBW). Input impedance: 130k ohms. S/N ratio (both ref. specified output power): 95dB, 120Hz tetrode; 95dB, 120Hz, triode. Power consumption: 650W idle, 1800W full power.
Dimensions: 19" W by 21" H by 20" D. Weight: 240 lbs.
Price: $25,000/pair. Approximate number of dealers: 29.
Manufacturer: Vacuum Tube Logic, 4774 Murietta St., Suite 9, Chino, CA 91710. Tel: (909) 627-5944. Fax: (909) 627-6988. Web: www.vtl.com

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.

Item

Included

Original Box

Yes - Original Crates

Manual

No

Remote

N/A

Cables

No

Physical Condition

9

Working Condition

10

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