Item: Graaf 5050 Power Amplifier
Location: Hurlstone Park, Sydney, NSW
Price: $2500
Item Condition: 7/10 (cosmetically a few blemishes, see images, which make them look much worse than in the flesh, but I want to be transparent in my advertisement)
Reason for selling: possible upgrade
Payment Method: Pickup - Cash, Paypal
Extra Info:
Currently in my second system, which looks like getting dismantled to upgrade main system. Sweet and detailed sounding high end amplifier. Matches beautifully with Triangle Zays Speakers to be listed shortly.
Comes with lightly used Golden Lion matched tubes.
From the interweb:
The Graaf 5050 is an Italian tube power amplifier based on a push-pull valve circuit design. With the design priority of linearity and excellent signal-to-noise ratio in mind, the two 6922 double triodes are selected as part of the components. Its first class output transformers are hand-made by skilled artisans and are exclusively manufactured for GRAAF. The circuit operates in a class AB mode with great quality and efficiency. The power stage utilizes the efficient KT88A valves and are great for difficult loads. The bass packs more power and tightness than a normal 50 watts amplifier can provide. That is because despite its small size, the amplifier weighs alot due to its big transformers which gives the amplifier lots of power. Inside the GRAAF, there is a novel bias control, an automatic circuit which makes it possible for it to attain low distortion levels. Its great stability is not compromised and is reliable even during AC line variations. Power tubes can be replaced easily with just plug and play.
When played on MBL speakers, which the speakers are fairly well known to be difficult to drive, the Graaf 5050 holds its own weight in a vice like grip with seemingly limitless power. Even on fast pieces of music, the Graaf 5050 is able to keep up with the speed. One GRAAF owner described the 5050 amplifier he is using as dynamic, taut, vibrant, spacious, detailed, fast with superb soundstage and deep wide imaging. It is a stonkingly good amplifier, and an excellent match for his music tastes and hifi system. The powerful amplifying quality and careful workmanship makes the Graaf 5050 a considerable piece of equipment of any hi-fi systems.
Specifications :
Power Output........................................50 W + 50 W RMS
Output Impedance.................................4 or 8 ohms
Input Sensitivity.....................................1.4 V
Input Impedance....................................100 Kohms
Total Harmonic Distortion........................0,28% (a 1 W)
Signal/Noise Ratio.................................105 dB A
Frequency Response..............................7 Hz to 40 KHz (-3 dB a 1 W)
Negative Feedback.................................6 dB
Power Requirements..............................105 - 120 / 210 - 240 V (50-60Hz)
Dimensions(w x d x h).............................41.5 x 33 x 20 cm
Weight...................................................23kg
Product Information :
http://www.graaf.it/5050eng.htm (Manufacturer's Website)
Reviews :
http://www.audioasylum.com/audio/tubes/messages/1433.html
http://theartofsound.net/forum/showthread.php?t=6343
Pictures:
Location: Hurlstone Park, Sydney, NSW
Price: $2500
Item Condition: 7/10 (cosmetically a few blemishes, see images, which make them look much worse than in the flesh, but I want to be transparent in my advertisement)
Reason for selling: possible upgrade
Payment Method: Pickup - Cash, Paypal
Extra Info:
Currently in my second system, which looks like getting dismantled to upgrade main system. Sweet and detailed sounding high end amplifier. Matches beautifully with Triangle Zays Speakers to be listed shortly.
Comes with lightly used Golden Lion matched tubes.
From the interweb:
The Graaf 5050 is an Italian tube power amplifier based on a push-pull valve circuit design. With the design priority of linearity and excellent signal-to-noise ratio in mind, the two 6922 double triodes are selected as part of the components. Its first class output transformers are hand-made by skilled artisans and are exclusively manufactured for GRAAF. The circuit operates in a class AB mode with great quality and efficiency. The power stage utilizes the efficient KT88A valves and are great for difficult loads. The bass packs more power and tightness than a normal 50 watts amplifier can provide. That is because despite its small size, the amplifier weighs alot due to its big transformers which gives the amplifier lots of power. Inside the GRAAF, there is a novel bias control, an automatic circuit which makes it possible for it to attain low distortion levels. Its great stability is not compromised and is reliable even during AC line variations. Power tubes can be replaced easily with just plug and play.
When played on MBL speakers, which the speakers are fairly well known to be difficult to drive, the Graaf 5050 holds its own weight in a vice like grip with seemingly limitless power. Even on fast pieces of music, the Graaf 5050 is able to keep up with the speed. One GRAAF owner described the 5050 amplifier he is using as dynamic, taut, vibrant, spacious, detailed, fast with superb soundstage and deep wide imaging. It is a stonkingly good amplifier, and an excellent match for his music tastes and hifi system. The powerful amplifying quality and careful workmanship makes the Graaf 5050 a considerable piece of equipment of any hi-fi systems.
Specifications :
Power Output........................................50 W + 50 W RMS
Output Impedance.................................4 or 8 ohms
Input Sensitivity.....................................1.4 V
Input Impedance....................................100 Kohms
Total Harmonic Distortion........................0,28% (a 1 W)
Signal/Noise Ratio.................................105 dB A
Frequency Response..............................7 Hz to 40 KHz (-3 dB a 1 W)
Negative Feedback.................................6 dB
Power Requirements..............................105 - 120 / 210 - 240 V (50-60Hz)
Dimensions(w x d x h).............................41.5 x 33 x 20 cm
Weight...................................................23kg
Product Information :
http://www.graaf.it/5050eng.htm (Manufacturer's Website)
Reviews :
http://www.audioasylum.com/audio/tubes/messages/1433.html
http://theartofsound.net/forum/showthread.php?t=6343
Pictures:
