I am actively putting together two systems:
System 1 - 5.1 for our home which serves as home cinema and home studio and used for studio tasks usually about once a week. This is an open plan type home that contains the kitchen and adults bedding in one room. Another same sized room is attached, with an amenities' room separating the two. A full length room run alongside the two main rooms and serves as my workshop, large double sliding doors from main room to workshop. These areas are contained in a square house structure
System 2 - 2.1 mobile box with 3 aux amplifier channels outputs, for a portable setup, which can supply extra amplification on demand with extra speakers. This will be installed in the workshop in a manner that allows easy removal. Mainly for listening to music while I am working, as well as for testing stuff without having to rip into the home system (I hope the logic for common device models is now apparent)
Request
The living room is not a place for a PA system, neither is the sound quality and ability of most of this sized PA systems out there for portable use acceptable. System 1 will be in operation here virtually 24/7. Think of these as being in the same category as the high-end Japanese audiophile disc players that feature mic inputs. I do not believe that anyone would be upset about such a disc player being discussed in a Hi-fi forum, so please may I request that discussion on an amplifier with the same feature doesn't upset anyone's sensibilities
Please regard these as a Hi-fi want to be setup. Both will be used for audio and video reproduction and appreciation and when liquid courage hits the spot, these systems should invite one to grab something and let loose
Desired feature:
This thread is for the class d amps that will be contained within
I have been saving for this project for a while, and in the meantime pouring over catalogues and specs and pestering folks with uneducated questions and ideas. Time to get to work on these, so I have ordered these items:
Signal IO
This unit will get fitted inside the amplifier case and provide most of the signal IO and act as the brains and system overall volume (has remote) as well as individual channel adjustment
4K@60Hz HDMI 2.0 Audio Extractor Converter DTS AC3 5.1CH Digital Audio Decoder ARC SPDIF Coaxial PC-USB Bluetooth Audio Input
Amplification
To be trailed as the low frequency amp
AIYIMA 500Wx2 Digital Power Amplifier (PSU on the board) x 1
To be trailed as the main channels amp and low frequency amp
HIFI Power IRS2092 500W Mono channel Digital power amplifier x 5
+ Lusya Dual DC 36V Output LLC Soft Switch 500W Switching Power Supply x 1
To be trailed as the main channels amp and bench amp
TDA7492 Amp Class D High-Power Digital Amplifier Board 2x50W (to run in bridge mode as a mono amp) x 1
+ 24V switching power supply board 4A 100W x 1
Speaker drivers
Low frequency
Dayton Audio RSS265HO-44 10" Reference Series HO DVC (delivered) x 1
Main channels
Already have a number of various pairs of bookshelf types on hand. Working on an interesting 6" coaxial speaker alongside this project, I am using some very interesting sounding drivers that I auditioned and bought, but I fear derision on my choice here
Reason to post thread
I am getting some promising looking kit that might help me acquired the desired sound system. Please guys, help me with peer review of my choices and suggestions to gear that I may not have noticed. I know create folks out there will have some great ideas too. Please help with mod suggestions as well as education pointers in anything I may be lacking. This will also be a log for me to help keep track of my project
Thanks and regards
Randy
System 1 - 5.1 for our home which serves as home cinema and home studio and used for studio tasks usually about once a week. This is an open plan type home that contains the kitchen and adults bedding in one room. Another same sized room is attached, with an amenities' room separating the two. A full length room run alongside the two main rooms and serves as my workshop, large double sliding doors from main room to workshop. These areas are contained in a square house structure
System 2 - 2.1 mobile box with 3 aux amplifier channels outputs, for a portable setup, which can supply extra amplification on demand with extra speakers. This will be installed in the workshop in a manner that allows easy removal. Mainly for listening to music while I am working, as well as for testing stuff without having to rip into the home system (I hope the logic for common device models is now apparent)
Request
The living room is not a place for a PA system, neither is the sound quality and ability of most of this sized PA systems out there for portable use acceptable. System 1 will be in operation here virtually 24/7. Think of these as being in the same category as the high-end Japanese audiophile disc players that feature mic inputs. I do not believe that anyone would be upset about such a disc player being discussed in a Hi-fi forum, so please may I request that discussion on an amplifier with the same feature doesn't upset anyone's sensibilities
Please regard these as a Hi-fi want to be setup. Both will be used for audio and video reproduction and appreciation and when liquid courage hits the spot, these systems should invite one to grab something and let loose
Desired feature:
- An ability to keep electronic hardware and speaker driver models common to both systems
- Emphasis is on quality quite nighttime sound reproduction and ample headroom without loosing composure for other times
- Switch power supplies (desire to stay away from "ring cows")
- Tubey audio signature (prefer the sound of the 300b amp for audio)
- Engineered with the ability to input a live performer or two on demand (In other words, beautiful reproduction of prerecorded material, containing the "studio to mastering" process internally for a seamless jamalong)
- Low pass channels to be either about; 400 clean watts into 8 ohms - 400 clean watts into 2 ohms - 2 x 200 clean watts into 4 ohms each
- High pass channels to be about 100 watts clean into 4 ohms
This thread is for the class d amps that will be contained within
I have been saving for this project for a while, and in the meantime pouring over catalogues and specs and pestering folks with uneducated questions and ideas. Time to get to work on these, so I have ordered these items:
Signal IO
This unit will get fitted inside the amplifier case and provide most of the signal IO and act as the brains and system overall volume (has remote) as well as individual channel adjustment
4K@60Hz HDMI 2.0 Audio Extractor Converter DTS AC3 5.1CH Digital Audio Decoder ARC SPDIF Coaxial PC-USB Bluetooth Audio Input
Amplification
To be trailed as the low frequency amp
AIYIMA 500Wx2 Digital Power Amplifier (PSU on the board) x 1
To be trailed as the main channels amp and low frequency amp
HIFI Power IRS2092 500W Mono channel Digital power amplifier x 5
+ Lusya Dual DC 36V Output LLC Soft Switch 500W Switching Power Supply x 1
To be trailed as the main channels amp and bench amp
TDA7492 Amp Class D High-Power Digital Amplifier Board 2x50W (to run in bridge mode as a mono amp) x 1
+ 24V switching power supply board 4A 100W x 1
Speaker drivers
Low frequency
Dayton Audio RSS265HO-44 10" Reference Series HO DVC (delivered) x 1
Main channels
Already have a number of various pairs of bookshelf types on hand. Working on an interesting 6" coaxial speaker alongside this project, I am using some very interesting sounding drivers that I auditioned and bought, but I fear derision on my choice here
Reason to post thread
I am getting some promising looking kit that might help me acquired the desired sound system. Please guys, help me with peer review of my choices and suggestions to gear that I may not have noticed. I know create folks out there will have some great ideas too. Please help with mod suggestions as well as education pointers in anything I may be lacking. This will also be a log for me to help keep track of my project
Thanks and regards
Randy
The first amp you have listed looks promising. The pics shown have high quality components and SMD construction. Looks fairly good.
The sub woofer will work but I would go with two of them. Good driver though.
The IO looks decent but don't know anything about it.
The other stuff I'm not to sure about. The boards all have generic commodity components on them and due to that you never know what you are getting as the components can change from one batch to another. The specs can run astray and you never know how long they will last or if they will start acting wonky. BUT at the price I guess it may be worth the gamble. I really don't know anything about them as there is so much of this stuff coming out of China these days who can keep up.
Thank you for your interest. Regarding the sub, I am setting up for the ability to run 4x drivers. I got one in to test for sound, will get three more after sorting out the amps
Re the IO, I have an update for this. I came across a tiny DSP stereo BT/PC-USB module. I'll fit this to the main stereo input too to enable on the fly DRC (dynamic range compression) for nighttime non-home theatre music. I'll fit this to a vacation portable system too
Big update on the amps
I have come across two class d manufacturers that have the spinal fortitude to interact with end users here on diyaudio and offer the value in line with AliExpress and similar. I plan to stick to their boards from now on and that should eliminate number one worry with dodgy components
Unfortunately most of those in China don't have access to the internet like we do. They have their own Chinese internet but that is heavily censored. Plus if you only speak Chinese it would be a real pain trying to communicate in English I mean just try and make sense of their product descriptions.
I mean LJM and Eric. Both seem to be offering competitive products, and I would rather the devil you know if that makes sense!
Then it has a +15 gnd -15 connector. This seems useful for powering my sub filter and VU meters
This one hold a lot of promise. The amp has two separate 24v DC connectors for fan. I am hoping to be able to run a dc boost converter of one and a dc step down converter of the other for my tube front end power and filament
Then it has a +15 gnd -15 connector. This seems useful for powering my sub filter and VU meters
Have you considered icepower? I just have to put the final touches on an Icepower amp I just got done building. I decided late in the game to put VU meters on the amp so I will be taking part of it apart and adding the meters and finding the space for the driver board. The Icepower stuff is exceptional but it is more expensive.
I haven't come across them in Ali searches for class d amps. I did most of my shopping there to take advantage of the recent big sale
I like old school dancing needle VU meters, they are cool
I like old school dancing needle VU meters, they are cool
You won't find Icepower on Ali. They are Danish.
https://icepoweraudio.com/products/class-d-amplifiers/
Here they are:
https://www.aliexpress.com/wholesal...&SearchText=icepower&spm=a2g0o.home.1000002.0
Are they real, fake?
Pays your money, takes your chance...
I stand corrected. They look legit. Although the prices vary quite a bit for the same amp which makes me think that there are probably some nock offs mixed in with legitimate offerings. If I where buying one I wouldn't be looking for anything sold below what the price charged by Icepower is as they would have to be fakes.
I was lucky enough to buy a new original 50ASX off a UK seller on ebay for £17.50. He had quite a few for sale, wish I'd picked up more than 1!
Usually when the prices are down then the shipping is up. Most things add up about equal with shipping added. I have notice this on ebay too
There is one thing I like about Amazon and that is their free Prime shipping.
The 50ASX for under 20 euros/dollars is a really great deal. They go for quite a bit more than that now. The prices over on Ali are all over the place.