![]() ![]() It has fixed SMPS supplies, just like my preamp, and my ADC/DAC of choice, and my sub woofer, and my speakers. The opamp based DIY preamp essentially duplicates the specs (and to my ears the audible performance) of the Halcro DM10 at approximately 1/40th of the price.īy the way, the AHB2 does not have "sliding voltage rails". In listening tests I was unable to distinguish the AHB2 from the Halcro DM68- an amp (or its sibling) that was earlier placed on a pedestal by TAS et al. In any case, only the Halcro amps can better its traditional specs, and that by trivial amounts. The AHB2 uses, just like it's Quad precursor, a combination of feedforward and feedback correction paths (look at the relevant patents). I'll take what's in the Xs Phonox, Monty! And subsequently owned a Stasis amp for decades. non-correlated sine waves - subjecting a correction factor of 10,000:1 (typical 40 db feedback) causes all manner of unexpected intermodulation products that blur the musical signal.ĭon't know about you, but I've found the work of Nelson Pass quite impressive since I first heard his Threshold 800A in 1976. In the real world of reproducing a musical signal - vs. I'll take what's in the Xs Phono box, Monty!Īs am I. I like to think the latter would sound better."ĭon't know about you, but I've found the work of Nelson Pass quite impressive since I first heard a Threshold 800A driving Dayton-Wright XG-8s in 1976. 01% 2nd harmonic with a single tone without feedback, you could also achieve the. 70 dB of feedback would do it, but that does seems like a lot.īy contrast, it appears that if you can make a single stage operate at. 1% with a complex signal, then you need to reduce it by a factor of about 3000. "If you want the peak distortion of the circuit of figure 13 to remain below. non-correlated sine waves - subjecting a correction factor of 10,000:1 (typical 40 db feedback) causes all manner of unexpected intermodulation products that blur the musical signal. In the real world of reproducing a musical, i.e. ![]()
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