IAG have resurrected Peter's justly famous Quad II tube amp. Tube amps belong in museums not heir domestic audio systems. Puffery is loony and designed to appeal to those with more money than sense and no technical background. The 909 is the only Class C feed forward current dumping amplifier available.Īnd yes, I'm saying that BK Butler amp, is founded on BS, and the advertising This Class C feed forward design was one of many of Peter Walker's patents. I know of no better amp at any price and can recommend this amp with unreserved confidence. MRSP is now $1840 and they are $500 under that. Galen Carol Audio offer it at an excellent price. It will deliver 250 watts per channel into four ohms. However the 909 handles this type of load with ease. Electrostatics present a highly reactive load to an amp, which embarrasses many. In your situation the choice of one of Peter's current dumping amps is particularly apt, as Peter Walker was renowned for his electrostatic loudspeakers. They are superb unfussy amplifiers that you just use and forget. This provides the error correction to the dumper transistors. The performance of the amp is set by the very high quality class A amp. The components can age and drift in value within wide margins and the performance of the amp is unaffected. Now the genius of Peter's current dumping amps, is that apart from being unconditionally stable into all loads, is that they maintain performance year after year. There first was the 405 followed by the 405 2 and the 606 finally his last version the 909.Īfter retiring due to ill health and his subsequent death, Quad was eventually acquired by the current owners International Audio group.
What Peter called his current dumping amplifier. Then he had another of his strokes of pure genius, the Class C feed forward amplifier. I have one of his originals, and I have never been inside the case! These amps are still highly sought after 40 years on. Along the way he designed the worlds first transistor amp unconditionally stable into all loads. In 1963 he started R & D on the famous Quad 63 Electrostatic loudspeaker. what has now come to be known as the Quad 57.
#Replacement tubes for bk butler tube driver full#
In 1957 he introduced the the world's first full range electrostatic loudspeaker. In the post war years he developed tube amps of unrivaled performance and quality. Just before the end of WWII he moved to Huntingdon Cambridgeshire. Quad was founded in 1936 by the late Peter Walker OBE. Quad stands for Quality Unit Audio Domestic. Without a doubt the Quad 909 is the amp you are looking for. I will hold it against you if you give them one dime of your hard earned money.Ĭlick to expand.OK. It is hubris like this that has basically ruined the hobby of audio. This is the sort of lunacy that needs swatting at every opportunity. If you want to waste money on this sort of nonsense, it is your dime. Solid state devices have much better signal to noise specs. It is just a potential source of noise and failure. Putting one tube in each channel has no merit whatever. Leak achieved 20 watts of tube amplification, no solid state devices then, and achieved 0.1% THD in 1948, setting a new benchmark! What these clowns are doing is putting one triode tube stage of voltage amplification in each channel and congratulating themselves on getting 0.1% THD! Their output stages are entirely solid state. Their amps in NO WAY are single ended triode amps, but do have a single triode in each channel.
The distortion if these amps is at least 2% and they only can deliver two to four watts of power at the most. The info is totally dishonest, misleading and bogus.īasically they trying to say they are absolute geniuses because they can use a single "ended" triode tube and get 0.1% THD.Ī single ended tube amp means an amp using a single triode as the output device. Click to expand.I have just been on the BK Butler web site.
0 kommentar(er)
