Cello Performance Amplifier II (Monoblock Pair) Lightly Serviced

$14440.0 Buy It Now or Best Offer
free,30-Day Returns

Seller Store skyfiaudio
(455) 100.0%,

Location: Glen Rock, New Jersey
Ships to: US,
Item: 296674743027

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Cello:Cello
MPN:Performance Amplifier II
Performance Amplifier II:Performance Amplifier II

Cello Performance Amplifier II (Monoblock Pair) Lightly Serviced Cello Performance Amplifier II (Monoblock Pair) Lightly Serviced General: Very rare and very collectable monoblock amplifiers. “For 15 years Mark Levinson and the engineers at Cello created the world’s best high fidelity equipment, and the continued interest in the equipment speaks to the enduring quality and performance of those products. The Cello Ltd. product line consisted of speakers, amplifiers, pre-amplifiers, and peripherals.” These are unique Mark Levinson Cello Performance II monoblock amplifiers. They’re configured as dual-chassis per channel of amplification, for a total of 4 boxes. These amplifiers are later version Performance II’s rated at 200 Watts at 8 ohms, and 400 Watts at 4 Ohms. We performed a light service and a full test in our lab and listing area where they performed admirably at their full rated power. Overall condition is pretty solid with very clean faceplates and all hardware intact. The top covers do have some scratches since they are made of soft aluminum. In my opinion it would be difficult to find a better built and sounding mono amplifier at this price point. More from Cello: The Performance Amplifier is a four chassis set, comprised of two mono power supplies and two mono power amplifiers. The Performance Amplifier includes many engineering features exclusive to Cello, which together provide unparalleled speed, clarity, impact, natural tone quality and reliability. Each amplifier chassis has a balanced audio input, balanced bridging output, and four sets of barrier strip outputs. Three pin Fischer connectors are uséd to provide balanced line audio connections of the highest quality. The cost of the Performance Amplifier reflects Cello’s insistence on the most innovative circuitry and premium parts. The Performance Amplifier offers a combination of sonic purity, power, build quality, freedom from obsolescence, and flexibility that makes a new level of musical integrity and system performance possible. SkyFi Cosmetic Notes: The tops of all chassis show cosmetic wear from stacking including scratches and light depressions near the corners. Some are in better condition than others. The faceplates present very well overall, but one power supply chassis does have a series of scratches near the bottom edge. SkyFi Technical Notes: These amplifiers received a light servicing in house which included the replacement of (2) suspect Sprague capacitors in each amplifier chassis. We also verified the DC offset and bias settings. Both amps tested well past their rated output power. Ownership: Single Owner Connections: Mini XLR ports, and speaker screw down posts. General Sound: Smooth, uncolored, undistorted natural and clean Cosmetic Condition: 8/10 = Very Good. Excellent front faceplate, one minor flaw on chassis side or top. See our detailed rating description here. Working Condition: Working perfectly and tested in our lab and listening room. Included: Exactly as pictured and described above. Packing: Will be packed using our highly developed in-house process and custom packing materials.Specs: Power Output (single amp): @8 Ohms Rated: 200 Watts Clipping: @1000 Hz >350 Watts @4 Ohms Rated: 400 Watts Clipping: @1000 Hz >700 Watts @2 Ohms Rated: 800 Watts Clipping: @1000 Hz >1000 Watts @1 Ohm Rated: 1000 Watts Clipping: @1000 Hz >1300 Watts Power Output (bridged set): @8 Ohms Rated: 800 Watts Clipping: @1000 Hz >1400 Watts @4 Ohms Rated: 1600 Watts Clipping: @1000 Hz >2800 Watts @2 Ohms Rated: 3200 Watts Clipping: @1000 Hz >4000 Watts IMD (SMPTE): 0.13% (60 Hz / 40V Output) IMD (CCIF): <0.2% THD (20 - 20000Hz): <0.1% (8 & 4 Ohms / 40 Volt Output) Frequency Response: +0 / -0.8 dB @ 20 - 20000 Hz Dynamic Headroom: 2.7 dB Channel Separation: Infinite Signal to Noise: < -105 dB (1000 Hz / 40 Volt Output) Input Sensitivity: 1.485 V (8 Ohms / 200 Watts / 40 Volt Output) Input Impedance: 1 mOhm (Non-Inverting) 5000 Ohms (Inverting) Gain: 28 dB Dimensions: 17.5"w / 8.5"h / 18.5"d (each of four chassis) Weight: 260 lbs. Approximate Age: 1990 Testing Process: We start with a visual inspection of all internal components to make sure that there are no signs of heat stress or damage. Capacitors are checked for telltale signs of predictive failure including bulging, shrunken wrappers, or physical leakage. We also inspect the PCBs for discoloration from resistors or transistors that may have been running hot. On vintage units we often spot check select capacitors for value and ESR. If the amplifier passes visual inspection, we move on to a controlled power on sequence using a Sencore safety analyzer to monitor current draw in real time. Once the amplifier is determined to be safe to operate, we connect it to full AC mains for function and power testing. We connect the speaker outputs of the amplifier to a Sencore PA81 Power Analyzer which acts as a dummy load, DC offset monitor, and oscilloscope interface. We start with a low level 1 KHz test signal at the amplifier's input and slowly increase its amplitude while monitoring the output on an oscilloscope for signs of noise, clipping, distortion, or improper channel balance. We continue increasing the signal level until the amplifier reaches clipping. At this point we take an output power measurement and compare it to the spec sheet of the amplifier to verify proper performance. If the device under test has both balanced and single ended inputs they are both tested at this time. We finish off the bench evaluation with a 1 KHz square wave check and a 20 Hz to 20 KHz sine sweep to assess the amplifier's frequency response characteristics. This battery of tests will usually reveal if the amplifier has any issues that need further attention. Before the device leaves the bench, we perform a listening test with actual music using a variety of preferred test tracks. Our benches are outfitted with familiar monitor speakers which help us identify inconsistencies that will not always show up on our test gear. The main things that we are listening for are hum or noise with no signal present, proper center image, clicks, pops, or any other obvious undesirable audio characteristics. If the unit passes all of these tests it is moved to our long term testing rig where we simulate real word operating conditions for 6-8 hours minimum. This allows us to monitor the unit for signs of thermal runaway or intermittent issues that only crop up when the unit has fully come up to temperature. ---------- SkyFi Audio - Curators of Vintage Audio Gear SkyFi Audio is a small startup business specializing in the purchase, reconditioning, and reselling of high end audio equipment. We only buy equipment that we admire and are passionate about. No mid-fi, no gimmicks, no junk. Each piece of equipment is cosmetically restored and fully tested in our well-equipped lab by an engineer with 30+ years of experience in the HiFi world. If it does not meet or exceed the original manufactures specifications, it will not be sold. We are very selective about the equipment we purchase, focusing on mostly analog, high-build quality, American, and European built units. Please note we are not a repair shop and only restore what we own. ---------- PURCHASING GUIDELINES: 1) This item will be professionally packaged and insured for safe transit to your home unless you opt for local pickup from our shop. All local pickup items are only wrapped in industrial strength clear stretch wrap if the original manufacturer packaging is unavailable. Local pickup is available in Glen Rock, NJ, 07452, just a half hour drive from Midtown Manhattan, with convenient parking near our building. If we don’t have the original packaging, we use heavy-duty double-ply corrugated boxes with custom made to your item SealedAir Instapak expanding foam custom inserts. In many cases this has proven to be better than the original packaging! We also use high quality fiber reinforced tape to seal our packages. Lightweight items will be bubble wrapped and shipped in a high-quality box. 2) We will not review or accept any offers that do not go through the official eBay system. We have too many items for sale and it’s nearly impossible to keep track of offers outside of the official system. Please do not message, email, or text any offers. 3) All listings are eligible for the eBay Global Shipping Program unless the item exceeds the maximum weight/price requirements to your country. If this is the case simply message us via eBay. We only accept bank wire transfers for international payments and frequently ship worldwide via UPS. 4) Please ensure your shipping address is correct within eBay as we will ONLY ship to the eBay/PayPal Confirmed Shipping Address. No exceptions. 5) eBay may charge and collect sales tax to your state/jurisdiction which we have no control over. eBay v1.8 &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times &times Buy now and save! Tell a friend Visit store Watch now Postage info UPS Ground - $0.00 Local Pickup - $0.00 Click the Postage tab above the listing description for more info Additional delivery notes PICK UP OPTION Our items are available for pick-up. Pick up procedure is as follows: Purchase the item through eBay Email us to coordinate pickup PAYING VIA PAYPAL We accept PayPal on our all our items so you can shop with confidence. Simple choose the PayPal option when proceeding through the checkout. Additional Information No additional information at this time Ask seller a question You might also like Dynavector 10x3 High-Output MC Phono Cartridge Music Reference RM-5 MK II Tube Preamplifier with Phono WyWires Silver Series Phono Interconnects - 5 Pin DIN w/ XLR Connectors - 4ft Music Reference RM-9 Tube Amplifier With EL34's Contact To contact our Customer Service Team, simply click the button here and our Customer Service team will be happy to assist. Ask seller a question © SkyFi Audio Postage Click the Postage tab above the listing description for more info Payment Accepted Payment Methods PayPal Returns Returns are not accepted Seller will pay for return shipping. eBay integration by

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