georgehifi
Responses from georgehifi
| Bypassing A Preamp With Volume Pot In Amp C_avila1: Great idea, if your source has equal or higher output voltage than the input sensitivity of your amp great, you are almost there. If your source has a nice low ouput impedance say below 100ohms, this will happily drive down to 1kohm (1:1... | |
| Passive Preamp Recommendations? Jgiacalo: You are right, a passive volume control will give you the best transparency and dynamics if your setup is right, your 252 poweramp only needs 1.6v for full output and most sources give out over 2v, so this is a great match, as you can se... | |
| Best Integrated, period. I believe two of these maybe poweramps with passive preamps at the front, that have input switching, no active preamplifier as such, the Vitus SS101, and APL UA-S1.Many are doing this these days, esspecially among tube integrateds.Cheers George | |
| Matching Amplifier to Focal Maestro Utopia You'll want a solid state amp that can go close to doubling it's wattage from 8ohms to 4ohms and then to 2ohms (which means good current delivery) if you want the best from the lower and upper bass, on these speakers. I would suggest a good big BJ... | |
| Why aren't new vacuum tubes as good as old ones? Was was told once a while back by a 90 year old English tube guru who also worked in tube manufacturing back in the early days, I think he maybe RIP by now.He said to me that todays tubes will never match a good NOS tube, because back then they us... | |
| Which one better choice? Your CJ-PV9A has an "Output impedance: less than 200 ohms" this is average and could rise a little at the extremes, this is quite good for a tube preamp, and should be suitable to drive most low input impedance poweramps I would say down to 10kohm... | |
| Amplifier Input Impedance If you use unshielded interconnects, then yes a high input impedance will be more susceptible to rf noise, but it's very unlikely you will hear anything, unless you live outside a taxi/cab rank, analogue cell tower, AM/FM radio tower or similar. A... | |
| Amplifier Input Impedance The input loading resistor to ground cannot effect gain.But in solid state bi-polar input dc coupled amplifiers, if it's raised too much with an open circuit input will effect the amount of DC offset seen at the speaker terminals, which could be o... | |
| Lightspeed Attenuator - Best Preamp Ever? Photonman, good news that you prefer the Teradac, am I reading right that you think it's a little better than the wall wart you have, if so in what way? And do you know if your wall wart was linear or switch mode?As for Nelson Pass and that buffer... | |
| Amps bridged to mono with 4 Ohm Magnepans? You can also say the damping factor is halved (output impedance is doubled) with a bridged amp, so your bass performace (control over the bass driver)is not as good, even though you have more watts available.I've never been a fan of bridging, PA s... | |
| transformers/output impedance 160562 You also need to consider the negative feedback if any around the amp, it too will lower the the output impedance and speed up it's precieved HF bandwidth. Feedback can make a very average quality output transformer look reasonable, at the ... | |
| Any experience driving B&W 802 diamonds w/ Rogue A Yes they are the outer two boxes flanking the center power transformer box.http://kahlaudio.com/products/peach-audio-grand-pre-6/Cheers George | |
| Lightspeed Attenuator - Best Preamp Ever? If it's a new one, far as being fixed under warranty, ah, yes that would be out the window. If you decide to do it, do not use the nylon insulating washers that come with rca's. You must make sure that all 4 x of the metal bodies of the new rca's ... | |
| Lightspeed Attenuator - Best Preamp Ever? OK for US and Canadian owners of the Lightspeed Attenuator, I just did a search for definate linear wall warts that are all suitable. First three are regulated, last two are unregulated, it does not really matter, so long as they are linear 9-12v ... | |
| Lightspeed Attenuator - Best Preamp Ever? John47That is unless you had your own wall wart, and just ordered the Lightspeed without wall wart, I had a few who've done this.Cheers George |