Or file both ends of the wire. 😎
This afternoon, I plugged the Mini 2.0 into a pair of small Triangle bookshelf that takes the Watts and fear nothing. One hour of music with the volume at 3/4 like a nightclub with dynamic music (boom boom). This is good at the current level and heats reasonably despite the 30°C here. Well the sound is at bookshelf level. This amp's mastery of bass, detail without being surgical!
Stef.
This afternoon, I plugged the Mini 2.0 into a pair of small Triangle bookshelf that takes the Watts and fear nothing. One hour of music with the volume at 3/4 like a nightclub with dynamic music (boom boom). This is good at the current level and heats reasonably despite the 30°C here. Well the sound is at bookshelf level. This amp's mastery of bass, detail without being surgical!
Stef.
Last question Stef: where do you get your PCBs from?
I usualy oder from PCBway, but you wrote you don't have an account there. I'm wondering where you get yours from.
Thanks
Christophe
I usualy oder from PCBway, but you wrote you don't have an account there. I'm wondering where you get yours from.
Thanks
Christophe
condition : 400VA +-48VDC power supply
option A : single output build
option B : double output build with R25 7k5 adjustment.
What differences exist between these options about wattage or sonic signature or whatever?
Tibi's design is based on the design for 8 ohms and is designed for 5A current, as Stef also does. That's about 200W per channel. That is the continuous power of the Q17 with one pair of outputs. Detail resolution and bass control decreases with two pairs of power mosfet, due to the low power source resistors the power remains limited to 200W into 8 ohms. For a low load, this also means low output power.
Typically speakers have an impedance minimum of 3.2 ohms, this gives a power of: 80W for 5A current.
I have stabilized the 13th revision published here with impressive low bass performance and particularly fine resolution so that impulses of music can convert the full power, without losses via sources resistors or printed coil.
This means that in my setup the capacitors set the limit and so even with less transformer power considerable impulses are converted, such as the sounds of a bass drum. So the version 13 can play about 500W of power in the peak and low range without distortion. Since it is a 400W transformer, the 500W of each module are also only available as pulse peaks. To test this, however, you should also have very powerful speakers, otherwise the speakers will be destroyed by the amplifier.
Typically speakers have an impedance minimum of 3.2 ohms, this gives a power of: 80W for 5A current.
I have stabilized the 13th revision published here with impressive low bass performance and particularly fine resolution so that impulses of music can convert the full power, without losses via sources resistors or printed coil.
This means that in my setup the capacitors set the limit and so even with less transformer power considerable impulses are converted, such as the sounds of a bass drum. So the version 13 can play about 500W of power in the peak and low range without distortion. Since it is a 400W transformer, the 500W of each module are also only available as pulse peaks. To test this, however, you should also have very powerful speakers, otherwise the speakers will be destroyed by the amplifier.
Hello,
The Q17-Mini and the Q17-Turbo hold much more than 5A instantaneously. It basically depends of the power supply.
The Q17-Mini clip at 35V for a 50Vdc power supply. For the Q17-Turbo, I didn't do a clip test because I don't have a resistor powerful enough to load the amp output.
In practice all this power is not of much use because in normal listening we only consume a few Watts unless you use very large speakers with low sensitivity at very high volume.
Regards,
Stef.
The Q17-Mini and the Q17-Turbo hold much more than 5A instantaneously. It basically depends of the power supply.
The Q17-Mini clip at 35V for a 50Vdc power supply. For the Q17-Turbo, I didn't do a clip test because I don't have a resistor powerful enough to load the amp output.
In practice all this power is not of much use because in normal listening we only consume a few Watts unless you use very large speakers with low sensitivity at very high volume.
Regards,
Stef.
Hello Stef,
How is it possible that the turbo goes into clipping at higher power than the Mini? The turbo is not more powerful by design. According to my investigations the clipping is dependent on the capacity of the capacitors and not limited by the power mosfet.
Regards Tim
How is it possible that the turbo goes into clipping at higher power than the Mini? The turbo is not more powerful by design. According to my investigations the clipping is dependent on the capacity of the capacitors and not limited by the power mosfet.
Regards Tim
With the maximum power and low speaker impedance, the question is not about voltage, but about current.
With 48V power supply and approx. 40V max. usable peak voltage, a current of 12.5A = 500W peak results for 3.2 Ohm impedance. This does not take into account the current that is added as a back induction from the speaker and also loads the amplifier.
Tim
With 48V power supply and approx. 40V max. usable peak voltage, a current of 12.5A = 500W peak results for 3.2 Ohm impedance. This does not take into account the current that is added as a back induction from the speaker and also loads the amplifier.
Tim
I know that there is a Mouser shared project for iTiberius 2 pair output Q17 in his github.
Is there a Mouser shared project for iTiberius 1 pair output
Can I order 2pair output BOM excluding R22, R33, R34, R35, R36, R37 and re-counting 1 piece of each FQA46N15, IXTH48P20P for one channel?
Is there a Mouser shared project for iTiberius 1 pair output
Can I order 2pair output BOM excluding R22, R33, R34, R35, R36, R37 and re-counting 1 piece of each FQA46N15, IXTH48P20P for one channel?
Hello,
Seems that the last BOM from Tibi use Digikey instead of Mouser.
https://github.com/tiberiuvicol/Q17.3
Stef.
Seems that the last BOM from Tibi use Digikey instead of Mouser.
https://github.com/tiberiuvicol/Q17.3
Stef.
I ordered PCB and components with 17.2 gerber.
@iTiberius has changed some components including opamp at 17.3.
@iTiberius has changed some components including opamp at 17.3.
Hi stef1777,
I found something's wrong with the value of R4.
It's 1K from the schematic diagram but the BOM is 10R.
Which one is correct?
I found something's wrong with the value of R4.
It's 1K from the schematic diagram but the BOM is 10R.
Which one is correct?
I've uploaded this gerber zip file (https://github.com/tiberiuvicol/Q17-audiophile-amplifier/blob/main/Q17-Gerber.zip) to JLCpcb.
They say that there is no drill in this file and I need to re-upload a new gerber zip file.
How can I solve this issue?
They say that there is no drill in this file and I need to re-upload a new gerber zip file.
How can I solve this issue?