I still have to try adding the foam around it but will report any changes here.
I have made a few listening sessions and this amplifier really sound good! I'm very impressed by the soundstage as well. Very nice job Destroyer OS!!
Do
Ok cool, safety caps it is! So I'll just route them straight to chassi ground/earth then.
Will you solder the components straight to the pins of the rectifier?
Yes, soldered everything directly but you could use the connectors if you prefer. For me, direct soldering is less point of failure.
Do
Hi Do, you have an impressive list of amplifier builds. Maybe people following this thread would be eager for some more insight into how (or if) this sounds in comparison!
Hi sanjeev,
I agree that it would be good to compare amplifiers but I cannot connect the amplifier on my main ATS-4 speakers without a speaker protection. In fact no amplifier will ever be connected to these speakers without a protection, there's to much money and time involved. I trust Destroyer OS design but I'm simply not one to take a risk of burning a driver in case of a fault. I was planning on assembling an external speaker protection box for amplifiers that don't have one built in, this would allow me to test without fear.
Now, I've been listening to the amplifier on my Sagwee LT speakers and it sounds wonderful but these speakers are in the main living room and I cannot start swapping parts all the time since my family spend a lot of time in that room.
I will however, order the parts and assemble that box for external protection.
Thanks
Do
Just to clarify things for other builders, most amplifier designs (in DIY) don't have speaker protection built in, it is usually an external module that needs to be added in the amplifier chassis at your own discretion. I used to never put them in my builds until I build the Troels ATS-4 speakers, then the cost and time to build these speakers made me realize I should add this to all my builds. In some case, it could potentially affect sound signature, especially with mechanical relay contacts that degrade over time but with well designed SSR ones, it is much less of an issue.
Thanks
Do
Thanks
Do
I glad I read your last two posts. My speakers are DIY but were an expensive build.
Would this be an adequate protection circuit? Soft Start & Speaker Turn-On Delay / DC Protector Combo – diyAudio Store
Thanks
I'm not a fan of mechanical relay solutions for many reasons, I'll send you a PM since I do not want to spam this thread with products.
Do
I got one channel fired up and it sounds really good on an old Emotiva ERM 6.2 I had laying around. I don't have speaker protection circuits to install yet so I won't be testing them on my main speakers anytime soon. Also I couldn't get the DC offset any lower than about 9 mV for this first channel, is that ok?
The overall experience was much easy than I thought it would be after Destroyer OS answered some of my preliminary questions. Thanks again man.
The overall experience was much easy than I thought it would be after Destroyer OS answered some of my preliminary questions. Thanks again man.
9mv is great.
Glad it’s going well.
I would like to note almost no PCB kit comes with any form of speaker protection. It’s almost exclusively an add-on. For most DIY projects a properly operating amp on the bench with all the wires and parts checked is a-ok.
Not all speaker protection is equal, either. One of the reasons you don’t see it a lot (anywhere) is because so many types of it affect the sound. So if you want it choose a good one. I don’t consider it necessary but everyone feels different.
Glad it’s going well.
I would like to note almost no PCB kit comes with any form of speaker protection. It’s almost exclusively an add-on. For most DIY projects a properly operating amp on the bench with all the wires and parts checked is a-ok.
Not all speaker protection is equal, either. One of the reasons you don’t see it a lot (anywhere) is because so many types of it affect the sound. So if you want it choose a good one. I don’t consider it necessary but everyone feels different.
Thinking back over this, I'm surprised you can't get lower -even though 9mv is plenty low.
What is the PVI voltage? Do the 1.5Mohm resistors look soldered well?
