Hi there,
Have been looking at some commercial amps.
The onkyo A-9555 (http://www.eu.onkyo.com/products/product_en_781919.html) looks interesting.
But perhaps diy is also an option.
Looking for a stereo amp, >60w@8ohm continious with volume control.
Source will be a pc.
Only 1 set of rca and 1 set of speakers is needed.
No need for source selector, bass, trebble, loudness etc.
Budget is 500 euro.
So is there something I can build for that kind of money?
It is not my intention to flame or troll in any way.
Have been looking at some commercial amps.
The onkyo A-9555 (http://www.eu.onkyo.com/products/product_en_781919.html) looks interesting.
But perhaps diy is also an option.
Looking for a stereo amp, >60w@8ohm continious with volume control.
Source will be a pc.
Only 1 set of rca and 1 set of speakers is needed.
No need for source selector, bass, trebble, loudness etc.
Budget is 500 euro.
So is there something I can build for that kind of money?
It is not my intention to flame or troll in any way.
It depends; coldamp, hypex, and newclassd are mono modules, but most of the kits from 41hz.com are stereo.
You CAN use one supply for both channels usually, but most audiophiles would prefer separate supplies. I suggest a coldamp SPS80 or SPS30 switching supply. The SPS80 is on my wish list.
You CAN use one supply for both channels usually, but most audiophiles would prefer separate supplies. I suggest a coldamp SPS80 or SPS30 switching supply. The SPS80 is on my wish list.
I'm a newbie and I built a 2 channel amp based on Hypex amps.
all you need is a couple of the UcD 180St amps, a HG power supply and a transformer. I bought my transformer here in the UK for aorund £30. The rest cost around 300e direct from Hypex themselves. a few bits of wire and a case and that's it
a day after the bits arrived I had the amp working.
very very easy.
I'm now waiting on their new AD amps before building the other 3 channels for my 5 channel amp.
you'll get lots of support around these parts.
all you need is a couple of the UcD 180St amps, a HG power supply and a transformer. I bought my transformer here in the UK for aorund £30. The rest cost around 300e direct from Hypex themselves. a few bits of wire and a case and that's it
a day after the bits arrived I had the amp working.
very very easy.
I'm now waiting on their new AD amps before building the other 3 channels for my 5 channel amp.
you'll get lots of support around these parts.
"Truth is one, paths are many ..." - The Dalai Lama
Multiple amp modules from a single supply, if its a good one ... or multiple supplies if you really really need that CMRR and isolation between several channels in the same box ... (CMRR = common mode rejection ratio = a measure of the speration between signal paths ... greater than 100 db (relative) is good, more is better.)
Re the Onkyo above: " ... OnkyoÕs exclusive Vector Linear (VL) Digital technology to remove any spike noise before it introduces errors into the inversion timing ... " indicates they may have two digital switching supplies with feedback coming from the output stage of the (probably class-d) amp sections = pretty cool and hard to duplicate as a DIY amp. That Onkyo also hase a whole lot of other features, like pre-amps and "Discrete phono equalizer circuitry ..." that will be likewise, hard to duplicate in a DIY project. (If they had a nice pre-amp, without the amp stages, you could add your DIY Class-D amps to it ... )
Multiple amp modules from a single supply, if its a good one ... or multiple supplies if you really really need that CMRR and isolation between several channels in the same box ... (CMRR = common mode rejection ratio = a measure of the speration between signal paths ... greater than 100 db (relative) is good, more is better.)
Re the Onkyo above: " ... OnkyoÕs exclusive Vector Linear (VL) Digital technology to remove any spike noise before it introduces errors into the inversion timing ... " indicates they may have two digital switching supplies with feedback coming from the output stage of the (probably class-d) amp sections = pretty cool and hard to duplicate as a DIY amp. That Onkyo also hase a whole lot of other features, like pre-amps and "Discrete phono equalizer circuitry ..." that will be likewise, hard to duplicate in a DIY project. (If they had a nice pre-amp, without the amp stages, you could add your DIY Class-D amps to it ... )
all you need is a couple of the UcD 180St amps, a HG power supply and a transformer. I bought my transformer here in the UK for aorund £30. The rest cost around 300e direct from Hypex themselves. a few bits of wire and a case and that's it
For 360 euro aprox you can get 2 BP4078 modules (2 x 400W) plus a 800W switching power supply at coldamp. I bought it as a "pa/subwoofer pack" and this way you will get this price. I have this setup and I won't use a linear PSU again.
If you "only" need 200W or so, you can purchase a "hifi pack", comprising 2 BP4078 + 1 SPS30 (400W switching psu) for slightly less. Check http://www.coldamp.com/opencms/opencms/coldamp/en/coldamp_store/price_lists/ for the prices, I don't remember them well.
In both cases, you don't need _anything_ more so you don't need to spend more money on toroidal transformers, soft start circuit, etc.
All the comments I read also say that coldamp switchers beat HG PSUs in terms of sound quality, bass, etc. My experience is that sound is wonderful and all is light and small.
BTW: they provide _excellent_ support. I was even asked to send them a photo of my setup just to check if all was wired correctly before turning it on!
Just my experience. Hope this helps.
I'll bow out of this conversation.
As a newbie I've no idea what he's taking about. Before going with Hypex I read several reviews of DIY amps and for me Hypex came out the best.
However , not having any knowledge of techie matters I'm not in a position to judge.
In answer to your original question there's lots of ways of building a DIY amp for less than 500e.
In truth the biggest problem you'll have is deciding what case to use!
As a newbie I've no idea what he's taking about. Before going with Hypex I read several reviews of DIY amps and for me Hypex came out the best.
However , not having any knowledge of techie matters I'm not in a position to judge.
In answer to your original question there's lots of ways of building a DIY amp for less than 500e.
In truth the biggest problem you'll have is deciding what case to use!
I know nothing about the UcD. But I can see no problem with it. Though the 400 module might be the better alternative here.
I googled and got this:
I googled and got this:
UcD180 ST 40-60 W at 8 Ohm $80,00
UcD400 ST 80-120 W at 8 Ohm $135,00
It's your system and your money, but BP4078 can also be fed by any supply voltage from +/-35 to +/-60V (and they can make your SPS30 or SPS80 operate at these voltages, you only have to tell them), so, depending on the rails voltage you choose, you get:
8 ohm: 70 to 210W rms
4 ohm: 140 to 420W rms
(you can limit the max. output with the input signal amplitude, anyway)
Even if you are only looking from the price point of view:
I think that 1 BP4078 pair costs 200 euro and they _do_ include input wire with connector (hypex ones don't). They include some useful features that I appreciated a lot such as the clipping detector and seem more rudged while sounding very very good.
Besides, Spanish VAT is 16% and in Netherlands it is 19%. So for 2 x UcD400ST you pay a total of (100+7.50)x2 + 19% = 255.85 euro + shipping, while 2 x BP4078 cost 200+16%=232 euro + shipping and you get a product that is at least as good.
Please don't think I have something to do with them (I would like ), but you have to be fair when comparing different products and my experience was very good, so I feel like recommending them to other DIYers.
8 ohm: 70 to 210W rms
4 ohm: 140 to 420W rms
(you can limit the max. output with the input signal amplitude, anyway)
Even if you are only looking from the price point of view:
I think that 1 BP4078 pair costs 200 euro and they _do_ include input wire with connector (hypex ones don't). They include some useful features that I appreciated a lot such as the clipping detector and seem more rudged while sounding very very good.
Besides, Spanish VAT is 16% and in Netherlands it is 19%. So for 2 x UcD400ST you pay a total of (100+7.50)x2 + 19% = 255.85 euro + shipping, while 2 x BP4078 cost 200+16%=232 euro + shipping and you get a product that is at least as good.
Please don't think I have something to do with them (I would like ), but you have to be fair when comparing different products and my experience was very good, so I feel like recommending them to other DIYers.
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