clio09
Responses from clio09
| 6SN7GT VT231 TUBES I've always used Raytheon VT-231 tubes. Since I have my own computer tune tester I find samples on eBay for the most part. If I use a tube vendor my go to people are Andy Bouwman at Vintage Tube Services and Brent Jesse. | |
| Spatial Audio Raven Preamp @donsachs mentions the Bottlehead kit as an option for DIY enthusiasts. I would like to note for those of you whose budget won't allow for the purchase of a Raven, and are willing to take on a DIY project, you can purchase an Audio Note Kits (ANK)... | |
| Passive preamp question @thecarpathian Let's say you have a 10k attenuator. It could be a potentiometer, ladder or shunt type, but that attenuator will have a maximum output impedance of 10k, and the output impedance also varies based where you set the position of the at... | |
| How do you add remote control to a preamp, here's how. @phd You would connect the sources to the active preamp. Depending on how much gain your active preamp has you may not be able to run it with the volume control wide open. Best to start with the volume control at 10 o'clock, then see how much you ... | |
| Passive preamp question Where do you get the idea that passive preamps have extremely low output impedance? Unless there is a buffer at the output, in which case it's no longer passive but a buffered volume control, any passive preamp has variable output impedance. If we... | |
| How do you add remote control to a preamp, here's how. The benefit of a passive preamp is contingent on impedance matching. We have a situation here where the OP has an Alps pot in the passive unit, the value of which is unknown, but what we do know is that it presents an input impedance to his source... | |
| Electrostatics and tubes The Quad ESL (57) has been getting a bad rap for it's bass production for years. The speaker has quite good bass response down to 40 Hz. In most music, that would suffice. If you listen to rap/hip hop, electronic/dance, some of the newer movie sou... | |
| Electrostatics and tubes Let's clear up something here. Roger's direct drive amplifiers were made for either the Acoustat ESLs (non-hybrids) or his own ESLs. None were made for the Quad ESLs (the voltage was too high). The RM-10 was manufactured during the time Roger owne... | |
| Building Resonance Free Subwoofers @mijostyn IIRC the Dayton Audio amp that Duke LeJeune recommends for his swarm has a high pass filter but it's fixed at 12 dB per octave. So not very flexible. It's why I decided to use my own active crossover for the swarm I put together. | |
| High Pass Filter for Mains Same here, used their 3-way active crossover for years. Just recently sold it. I would have no problem buying from them again. | |
| Best amplifier for Acoustat 2+2 electrostats for holographic sound, or change speakers? @tomic601 agreed those Korg tubes were microphonic in my experience with them B1 as well. | |
| Best amplifier for Acoustat 2+2 electrostats for holographic sound, or change speakers? I would get rid of the interfaces on those speakers and use a direct drive amp. I have Acoustat Model 2s and did exactly that using the Acoustat Servo amps. Going with a direct drive amp removes the transformers from the equation which can restric... | |
| The Absolute Sound posts a video about a new product development from Magnepan, but... @bdp24 I believe I do have the only Model 2s that are modded by Roger. My experience with Acoustat came from the fact that Roger had a pair of Xs. He used (actually butchered) the cabinet so that he could test his own ESL panel and power supply. I... | |
| The Absolute Sound posts a video about a new product development from Magnepan, but... Most of the Acoustat panel speakers can be modified to use the Acoustat servo amps. Roger Modjeski did some mods to my servo amps, but unfortunately he passed away before we could implement the tube input stage. I modded my Model 2s with help from... | |
| Autoformer volume control in an active tube preamp? Antique Sound Labs Flora EX DT is a tube preamp that uses autoformers for the volume control so it certainly can be done. I toyed with the idea of doing it as substitute for the Kozmo stepped attenuators in my Audio Note Kits Mentor L5 preamp, but... |