[give_this_book_a_home]

THIS IS NOT AN AUCTION. YOU CAN BUY IT NOW FOR $630.

Everything is in perfect, mint condition.
Rating: 10/10.
Age: Purchased May 9, 2010
Buy it now price: $630.00
2010 Retail Price: $850.00
Shipping from Zip Code: 01085 - Westfield, Massachusetts
FREE SHIPPING! FREE DELIVERY!




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I am a “Top Rated Seller” on eBay because I have consistently received the highest buyer ratings, shipped items quickly, and earned a record of excellent service.
 
I am also a “Bronze Powerseller” on eBay since I have sold over $3,000 in items in the past year and have completed over 100 transactions as a seller. I am NOT a commercial seller or a business. I just have a lot of books, some electronics, and some other things to sell.

This transaction must be completed within eBay. (I cannot complete this transaction outside of eBay due to their policy). You must pay with PayPal.




FEATURES:

• The Beyerdynamic A1 headphone amplifier has been designed to operate headphones with a nominal impedance from 30 to 600 ohms.
  It can power the highest-impedance headphones such as the Sennheiser HD 800 and the Beyerdynamic Tesla T1.
  A special impedance headphone output ensures the control range of the volume potentiometer is also ideal for headphones with lower impedances.
  The high grade ALPS-potentiometer provides smooth volume control adjustment and the volume control knob is made from solid aluminum.
  The entire circuit can handle frequencies up to 96 kHz! It can reproduce the uncompressed audio from SACDs and DVDs with pristine results.
  A micro-processor-controlled relay provides noiseless switching between inputs.
  A generously-dimensioned toroidal core transformer ensures the highest fidelity dynamics.
  Two gold-plated stereo inputs and one gold-plated stereo output provide solid connections for interconnects.
  There is one 1/4" headphone socket (6.35 mm).
  The first input is hardwired to the A1 line out. Thus, the incoming signal can be passively loopedthrough even when the A1 is in standby mode. The A1 only needs to be powered on when using headphones.
  Two blue front panel LEDs indicate the active signal input.
  Multi-color LED indicates the A1's operating status.

SPECIFICATIONS:

• Compatible with headphones with a nominal impedance from 30 to 600 ohms.
  Input Impedance: 50 kΩ.
  Maximum Amplification: 18dB.
  Frequency Response: 1 Hz - 100 kHz (-1dB).
  T.H.D.: 0.001 % at 170 mW/ 250 ohms.
  Channel separation: > 89dB.
  Output power: 100 mW / 600Ω, 170 mW / 250 Ω, 150 mW / 30 Ω.
  Unweighted signal-to-noise ratio: > 100dB.
  Output impedances: Line Out (depending on the connected device), 100Ω headphone output.
  Power Consumption: < 15 watts via internal, controlled power pack.
  Audio connections: Headphone socket, 1 Line output, 2 Audio inputs. (All gold-plated RCA sockets).
  Dimensions: 9.85 inches x 9.85 inches x 1.96 inches.
  Weight: 5.07 pounds.
  

The Beyerdynamic A1 is a masterpiece!
 

Please visit the manufacturer's website for more details.
http://north-america.beyerdynamic.com/shop/hah/headphones-and-headsets/at-home/headphones-amps/a1-charcoal-grey-1.html

[Russell Dawkins]

Never could understand why a manufacturer would go to the trouble of building a full size hi-zoot headphone amp and only equip it with a single headphone jack. I don't see the downside of adding some versatility by providing two.