The Aleph J carries on in the tradition of the Pass Labs Aleph series, combining those elements that were particularly right about the Aleph 3 and 30, and re-thinking those areas open to improvement. Unlike its First Watt predecessors the F1 and F2, the Aleph J is a voltage source amplifier \u2013 a regular sort of amplifier like the ones you already know and love.<\/p>\n
There are differences between the Aleph J and its predecessors:<\/p>\n
1)<\/b> Improved power supply filtration with about 20 dB less voltage ripple<\/p>\n
2)<\/b> Reduced gain on the active current source, giving better overall performance into 8-16 ohm loads<\/p>\n
3)<\/b> Input stage using high quality matched JFETs<\/p>\n
4)<\/b> Much higher input impedance and vanishing capacitance<\/p>\n
5)<\/b> 15 dB less negative feedback.<\/p>\n
6)<\/b> Even greater stability, operating without lag compensation<\/p>\n
7)<\/b> 15 dB less noise<\/p>\n
8)<\/b> No electrolytic capacitor in the signal path<\/p>\n
Some things have remained the same \u2013 the Aleph J has the same basic 2-stage topology and uses output MOSFETs operating in single-ended Class A mode. It\u2019s distortion character is still 2nd harmonic, and it\u2019s sound is still natural and liquid. It is still very reliable. I don\u2019t know of a load that can damage it.<\/p>\n","protected":false},"excerpt":{"rendered":"