Search found 1562 matches
- Wed Sep 27, 2023 3:55 pm
- Forum: Dumble Discussion
- Topic: Steel String Singer #008
- Replies: 19
- Views: 14839
Re: Steel String Singer #008
For comparison a "Dumbleland Special" 150W: https://ampgarage.com/forum/viewtopic.p ... 84#p130484
- Wed Sep 27, 2023 7:00 am
- Forum: Dumble Discussion
- Topic: Steel String Singer #008
- Replies: 19
- Views: 14839
Re: Steel String Singer #008
What exactly do you think are the main differences between the circuits of a "Dumble Special" 150W, a "Dumbleland Special" 150W, and a "Steel String Singer" 150W? Or to put it another way: What modifications do you think turned the "Dumble Special" (model name on the front) into a "Steel String Sing...
- Fri Aug 25, 2023 6:27 am
- Forum: Dumble Discussion
- Topic: DUMBLE Trade Mark
- Replies: 105
- Views: 52154
Re: DUMBLE Trade Mark
John 8:7
- Sat Aug 20, 2022 2:38 pm
- Forum: Dumble Discussion
- Topic: Loud Speaker polarity ... again !
- Replies: 50
- Views: 14882
Re: Loud Speaker polarity ... again !
... if (and this is a big IF) a speaker is very non-linear and is not matched as far as the pressure response in the push versus pull direction ... The guitar speakers in use today, as far as I know, are almost all more or less non-linear because they were intentionally designed that way by their d...
- Fri Aug 19, 2022 2:12 pm
- Forum: Dumble Discussion
- Topic: Loud Speaker polarity ... again !
- Replies: 50
- Views: 14882
Re: Loud Speaker polarity ... again !
Alexander Dumble - Guitar Player Interview: How does your philosophy on speaker enclosures contrast with other companies? I think mine's different. I just don't believe in a baffle board with a couple of sides. Everything is designed to respond tonally. Even my open-back enclosures use air to the op...
- Fri Aug 19, 2022 11:56 am
- Forum: Dumble Discussion
- Topic: Loud Speaker polarity ... again !
- Replies: 50
- Views: 14882
Re: Loud Speaker polarity ... again !
A speaker cone that - for whatever reason - is not able to convert a symmetrical voltage fluctuation into a corresponding symmetrical air pressure fluctuation will of course also not be able to do this with reversed polarity. As I understand it, a polarity reversal of a sinusoidal voltage fluctuatio...
- Fri Aug 19, 2022 7:21 am
- Forum: Dumble Discussion
- Topic: Loud Speaker polarity ... again !
- Replies: 50
- Views: 14882
Re: Loud Speaker polarity ... again !
... in this example, rising peak has 1.4V amplitude, falling (second) has 0.8V amplitude. so in one speaker polarity TO YOU, in front, is coming the wave of 1.4V amplitude, and if you reverse polarity, to you in front is coming the second peak, falling , which is 0.8V. the first one 1.4V is now sho...
- Thu Aug 18, 2022 3:57 pm
- Forum: Dumble Discussion
- Topic: Loud Speaker polarity ... again !
- Replies: 50
- Views: 14882
- Tue Apr 19, 2022 2:20 pm
- Forum: Dumble Discussion
- Topic: Dumble Bargain
- Replies: 34
- Views: 17605
Re: Dumble Bargain
These are two pictures of Henry Kaiser's/John Mayer's preamp:
Source: http://www.amparchives.com/folder/2529/
Source: http://www.amparchives.com/folder/2529/
- Fri Apr 08, 2022 8:21 am
- Forum: Dumble Discussion
- Topic: Draloric Resistors - Before and After - Video Demo
- Replies: 51
- Views: 11270
Re: Draloric Resistors - Before and After - Video Demo
Resistor noise is both measurable and audible, so I accept that as real. I have wondered if that isn't what people are hearing, and describing with more flowery language? Or, perhaps if the presence of more or less noise affects the psycho-acoustic perception of the sound. As I understand it, one o...
- Tue Mar 22, 2022 3:56 am
- Forum: Dumble Discussion
- Topic: Dumble Bargain
- Replies: 34
- Views: 17605
Re: Dumble Bargain
Based on the listing description, the amp was brought back to HAD after he bought it in 1988 to have the tremolo circuit installed. HAD also seemed to use the MIEC caps in later (5th gen on) amps. I don't think we should be trying to date the amp based on those MIEC caps :D The TVAs do seem to be o...
- Mon Mar 21, 2022 4:45 pm
- Forum: Dumble Discussion
- Topic: Dumble Bargain
- Replies: 34
- Views: 17605
Re: Dumble Bargain
And which date exactly are you interested in in terms of "building" this Odyssey? For example: Placing of the order? Delivery of the first finished version to the first owner? Completion of the version in which this Odyssey was offered for sale in this music store in 1988? Completion of the version ...
- Mon Mar 21, 2022 4:24 pm
- Forum: Dumble Discussion
- Topic: Dumble Bargain
- Replies: 34
- Views: 17605
Re: Dumble Bargain
And what exactly do you mean by "original" in this context?
- Mon Mar 21, 2022 1:02 pm
- Forum: Dumble Discussion
- Topic: Dumble Bargain
- Replies: 34
- Views: 17605
Re: Dumble Bargain
... (Caps say 1976) ... I was dating the amp (using the most recent cap date as a reference) ... " ... FULL RIVER CAP.CO.,LTD (MIEC) was established in 1979, more than 40 years experiences in this area, we specialize in producing aluminum electronic capacitor, major products are middle and high vol...
- Wed Mar 16, 2022 6:34 am
- Forum: Dumble Discussion
- Topic: Dumble Bargain
- Replies: 34
- Views: 17605