Art AudioQuartet 845 Push Pull Mono Block AmplifiernewDemo Unit - Art Audio Quartet Mono-Blocks 45WThese are the amplifiers from the manufacturers photos. These are the explicit amps from the photos. Trades are accepted!These are the US Demo Units that we used at AXPONA, Capital Audiofest and ...13250.00

Demo Unit - Art Audio Quartet Mono-Blocks 45W

Listing ID: lis9a62g Classified 
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Time Left:26 Days
New Retail Price: $17,599.00


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Ships fromJersey City, NJ, 07302
Ships toUnited States
Package dimensionsunspecified
Shipping carriersUPS or FedEx
Shipping costFree
Original accessoriesBox, Manual
Agon miniAverageResearch Pricing

These are the amplifiers from the manufacturers photos.  These are the explicit amps from the photos.  

Trades are accepted!

These are the US Demo Units that we used at AXPONA, Capital Audiofest and the amps that were reviewed by Enjoy The Music.  They are in perfect condition though the stock tubes have a few hours on them.  These amps are upgraded in several ways:

- Polished stainless steel chassis

- Lums & Blue Lights

- XLR Connections

Shipping is in included as are paypal fees and will have a full five year warranty, six months on the tubes.   

Read the review here:

When we were looking to design an amplifier that could deliver the power of push pull designs and the sheer musicality of lower power single end designs, we settled for the 845 push pull combination and the Quartet was born.

845s are the king of tubes in terms of soundstage and the Quartets will not disappoint.  They deliver a massive soundstage that is wide and deep.  These are wonderfully musical amplifiers with lots of power and with the high frequency extension of a 300b.  They are fitted with MKP capacitors and carbon film resistors.  These amps also feature automatic biasing and have a solid state, twin choke, filtered power supply.

Rectified dc heater supply with twin pye filters.

Auto bias set for 85 mA @ 750v.  Solid state twin choke power supply.


  • Power – 45w

  • Type - Push Pull 845 Power Tube

  • Frequency Response - 10hz to 65,000hz +/- 0.5dB at 1W

  • Frequency Response - 20hz to 50,000hz +/- 1.0dB at Full Power

  • Input Sensitivity - 700mv

  • Input Impedance - 180 KΩ

  • Output Impedance - 4&8ΩTaps

  • Noise at Speaker Terminals - Typically 3mv

  • Feedback – 6dB 

  • Biasing – Automatic Electronic

  • Rectifier - Solid State

  • Drivers - ECC 82 and 12BH7 

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Return Policy
Return Window

Item can be returned within 30 days of receipt.

General Terms

Items must be returned in their original condition, with all included packing materials and no signs of use. Buyer assumes responsibility for all shipping return costs unless the item was not received as described.


Buyer will receive a full refund in the original payment method less any shipping charges.

Special Conditions

All devices are sold in working order unless otherwise stated and will ship to you well packed either in original packaging or a new carton with more than adequate shipping material. It will be insured so the only way I will accept a return is in a scenario where the product was damaged during shipping.


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