Cvr d-2004 |
Post Reply | Page 123 5> |
Author | |||
tehuti
New Member Joined: 24 March 2010 Status: Offline Points: 8 |
Post Options
Thanks(0)
Posted: 14 August 2023 at 5:59am |
||
So whats the most solid looking build qualitywise of the various companies if they seem to be made in the same or similar factories?
|
|||
Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5175 |
Post Options
Thanks(0)
|
||
I cannot say I have heard of any CVR amplifiers offering any overheating issues. As for the Morin, the hottest I have ever encountered was 55 Degrees Celsius when I conducted the longevity test years ago.
Had an outdoor event last week in which, I used the Morin for Bass to power two Double Eighteens. The amplifier remained 46 Degrees Celsius for 8 hours ( -5 dB from Clipping) under 87 degrees Fahrenheit weather with, 100% Humidity. 45 - 46 Degrees Celsius appears to be the standard on the Morin for the past 2 years this amplifier has been in usage. Best Regards,
Edited by Elliot Thompson - 11 July 2023 at 4:26pm |
|||
Elliot Thompson
|
|||
snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3122 |
Post Options
Thanks(0)
|
||
It's one of a very few obvious objective differences between two otherwise identical amps. Whether it is significant depends on whether you believe the higher power specs and whether these seem compatible with the differing cap and MOSFET specs. |
|||
RoadRunnersDust
Young Croc Joined: 03 December 2013 Location: United Kingdom Status: Offline Points: 561 |
Post Options
Thanks(0)
|
||
But what has that got to do with baseless statements about air flow?
Air flow is also only one small cog in the machine of thermal management, it doesn’t matter if it shifts more air than a Boeing 737 if it’s not ducted to give adequate air flow over the relevant components
|
|||
snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3122 |
Post Options
Thanks(0)
|
||
not inherently, but when components are de-rated by 5W/C cooling can be an issue. the CVR has a heat sensor on each channel and on the power supply so will try to investigate how hot it gets at high output. |
|||
RoadRunnersDust
Young Croc Joined: 03 December 2013 Location: United Kingdom Status: Offline Points: 561 |
Post Options
Thanks(0)
|
||
Current isn’t inherently linked to CFM of a fan…
|
|||
snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3122 |
Post Options
Thanks(0)
|
||
got a Sinbosen D4-3000 DSP last week. It is virtually identical to the Morin amp and has definitely been assembled in the same factory. Sinbosen caps are KXJ 270uF 250V and Nichicon 120uF 400V cores on the power supply are similar but have different part numbers on them - can't find specs online though. Sinbosen power lead is 3mm2 rather than 2.5mm2 on the Morin and CVR Sinbosen 12V fans are 4*1.4A which is four times as much airflow as the Morin or CVR Will do a post about the Sinbosen DSP when I've had more of a play with it. Morin: https://www.mouser.co.uk/datasheet/2/240/Littelfuse_Discrete_MOSFETs_N-Channel_HiPerFETs_IX-1856253.pdf CVR: https://datasheetspdf.com/pdf-file/585880/FairchildSemiconductor/FDH45N50F/1 Sinbosen: Oriental Semiconductor looks like it says OSG65R041HT3Z D10P05N but can't find a spec sheet for that exact part number |
|||
benjrig
Registered User Joined: 09 June 2019 Status: Offline Points: 13 |
Post Options
Thanks(0)
|
||
cheers mate will give that ago and give them an email
|
|||
snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3122 |
Post Options
Thanks(0)
|
||
finally realised that the software on the disc shipped with the amp was not the right version. ask them to email you correct version - or PM me if no luck and I will find the file they sent to me. Once I had the correct version it all just worked without any setup required. latest amps don't need laptop connected with USB>LAN converter - just connect them to network and the software will automatically find them.
|
|||
benjrig
Registered User Joined: 09 June 2019 Status: Offline Points: 13 |
Post Options
Thanks(0)
|
||
How did you manage to get the software to work in the end? Mine just keeps coming up with no device found?
|
|||
Maze
Registered User Joined: 13 April 2014 Location: China Status: Offline Points: 179 |
Post Options
Thanks(0)
|
||
I've lived in China for over 20 years. When it comes to service level, I think many time they are way ahead of anything I've experienced where I'm from, Denmark. The reason Costco lets you use a TV for 3 months and still allow you to return it is because they have calculated that giving customers that option creates more sales and is worth for them in the end. Hard to compare a small shop in Chinatown to Costco. When you look at Taobao etc. they have very good buyer protection and many shops there offer full returns etc. Things are changing, Chinatown is nowhere close to representing what is actually happening in China.
|
|||
Line Array
Registered User Joined: 19 March 2022 Location: New Jersey, USA Status: Offline Points: 83 |
Post Options
Thanks(0)
|
||
China teaches kids better science and math than western countries but they aren't more technologically advanced than we are.
They are behind in space program, fighter jets and most other things but they seem to be doing well with 5G, lithium batteries and solar panels. In China the schools actually teach kids something. In the west people learn on the job. Because the west is ahead you can learn more on the job in the west than you can in school in China but for how long ? With our garbage education here that prioritizes social studies and liberal arts over science and math we don't have a lot of time left before China stomps all over us. But the issue here isn't that China is or isn't advanced enough. It's that they seem to have a different culture in terms of consumer protection. I remember buying a kitchen cutting board in a shop in Chinatown in NYC walking to the car and changing my mind ... walking back to the shop not more than 5 minutes later and the Asian lady telling me "no returns" ... she wouldn't take it back. I also remember buying a Samsung TV from Costco ( here in US ) using it for almost 3 months to watch about 50 movies and then returning for full refund - they refunded everything including delivery, installation and return costs and didn't even check if there was anything wrong with the TV ( there were some minor issues like slightly bent bezel and flicker with some content ). in the US i have NEVER had a major store refuse a refund even when the condition was clearly used and there was absolutely nothing wrong with the product being returned. in fact there used to be a viral series of videos on YouTube where BlendTec used to blend iPhones and other gadgets to show the power of their blenders. in one video they blended the camera used to make the video and then went to return a plastic bag with camera dust to the store. the store did not accept the return but it took them half an hour to decide what to do before the manager ultimately and politely said that blending the camera was considered "abuse" and wasn't covered by return policy. i'm guessing if they tried this stunt in china they would be spat on and then beaten unconscious by the store staff.
|
|||
best place on the internet >>>
https://dissidentsound.discoursehosting.net |
|||
Post Reply | Page 123 5> |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |