georgehifi
Responses from georgehifi
| Which stereo amp to try under $30k mayoradamwest OP299 posts11-19-2019 5:23amOrdered the Boulder 1160Great choice, it uses BJT (bi-polar) output transistors, should drive those B&W 802D3 to their best, even into that nasty bass load without even breaking a sweat.Cheers George | |
| SACD or not Redbook standard is 16/44.1. What is hi-res Redbook?? Thing like the cd’s from the "Reference Recording" label, which is 25/96 redbook pcm also DXD. And they do sound superb, if you have an R2R multibit dac that can do up to 24/96 decoding, eg: an... | |
| Considering Moving to an Integrated, Opinions Appreciated Easy to drive and 85db efficient anything will do around 100w into 8ohms https://www.stereophile.com/images/archivesart/805fig1.jpgCheers George | |
| Subwoofer rumble issue This filter you bought, is for very low arm cartridge 7-12hz resonance (below 20hz), this you can’t feel or hear, it’s just very slow woofer movement. I think from what you described you problem is far higher, around 30-70hz this you feel and hear... | |
| Can GAN transistors be used for class A or AB or just call D Yes they can but they only come in N channel, no P, so you can't do a usual complimentary push pull. Same reason but more so the P channel in normal Mosfet amp is not as good good as the N but with GaN it would be even more so. From memory Soluti... | |
| Subwoofer rumble issue paulgardner OP10 posts11-18-2019 5:27am@georgehifi you were spot on. Stylus resting on a still record then tapped the plinth and the sub rumbled like crazy. Would a subsonic filter fix this or what’s the best solution in you eyes?There you are.The... | |
| new GAN amplifier You can’t just swap out the output FETs for the BJTs Please don’t say I said this sunshine, because I didn’t. I said there’s a member who converts Mosfet amps into a BJT amps, and of course there’s more to it than just changing the output devices... | |
| Recommend Amp and Preamp with Dynaudio Confidence 50 The Gryphon 300 may be in your reach.Lots of distributor/dealers in the USA https://gryphon-audio.dk/distributorsdealers/ Cheers George | |
| Subwoofer rumble issue paulgardner OP3 posts11-17-2019 2:11pmGeorge- I’ll give that a try when I get home tomorrow. Thank youYep air-born feedback.I bet nearly 100% it’s your problem.1: Remember system all on including sub (not in standby auto switching mode).2: Stylus ... | |
| Recommend Amp and Preamp with Dynaudio Confidence 50 thelapillil Recommend Amp Dynaudio Confidence 50 Nice speaker, that has a fairly nasty load of 2.7ohms at 80hz right where all the grunt is needed from an amp. This could be even lower if there’s -phase angle in that area also. SpecificationsS... | |
| Subwoofer rumble issue paulgardner My subwoofer will rumble uncontrollably when playing records at a higher volume. Your are getting "air-born feedback", and it can’t be cured with better stand mounting.Do this.If you just put the stylus on a record NOT spinning, turn ... | |
| new GAN amplifier Of course there are different drive conditions and they are all addressable in changing over mosfets to bjt, you just choose not to believe it. 🤦♂️ And I'll post once again the pro's for going bi-polar "BJTs tend to have better, more linear gain... | |
| new GAN amplifier what you wrote below, I cannot just accept on the face as factual. That's your opinion, it is, and if your are a tech you'll know that it's very possible to do this to the driver/output stage.Cheers George | |
| Are most recordings so bad it's not worth spending large on speakers? I have been struck with how wonderfully some early recordings can be and how horrible a few later recordings are. It’s "Dynamic Range Compression" in the newer ones, read my last post as sample of the same album, new release vs original release. ... | |
| new GAN amplifier How can you know "what to listen for" There’s a post a member put up a couple of weeks ago (go find it), who does mods for his customers, where he takes a Mosfet amp removes the complimentary N/P channel Mosfet output stage and replaces it with c... |