Compression drivers / Horn FR graphs ( Vitavox S2 )
- Thread starter andromedaaudio
- Start date
At least the blue ones on the right are power supply caps...not clear enough on the left to say for sure.
should be two hiraga super class a amp replica left and right side. 20 watt class a
The capacitor is chosen to be too large so that the amplifier circuit has no influence on the power supply, regardless of the load. Many people also use car batteries as energy storage together with the capacitors.
Last edited:
Original Jean Hiraga amps are rare these days, but there are plenty of DIY plans online. The problem is getting hold of the original transistors used, which are now traded like gold. But there are certainly some good replicas.
Accu version hiraga amp over 1 farad capacitors+ two car batteries 20 watt sounds phantastic
Diy
Jean Hiraga's Super Class-A Amplifier
A build of Jean Hiraga's 20W Class-A Amplifier Project using current production power transistors.
diyaudioprojects.com
For my part It would be interesting to hear / view any audio video’s that you might feel comfortable in sharing with us of your most interesting horn transducer array
Such heavy passive storage regulation tend to kill dynamics , exception being when fully electronic regulated , have you compared ..?
the exact opposite is the case. If your operating voltage does not drop, no matter what is dynamically required of the subsequent circuit, then you have dynamic headroom. No impulse will affect the sound quality. The amplifier has no regulation in the power supply. Regulation makes sense if, for example, you want to use tubes for as long as possible and regulate the voltage and current, thus forcing the tube to an operating point until it dies.
I had hiraga amps 10 years ago sounds pretty good. they are more stable than the wattage suggests.
I have heard Hiraga's Le Monstre at Hiraga''s place, yes. With his WE. He uses Vac 300b on his Altec and the 8w SS on his WE. He did say the best of his SS were his old 20w amps like Dasguteohr said.
Have to disagree , that much Capacitance plus batt act as regulation , all batt powered amps i have Heard , tried and or built had a soft sound , even the Roland Research batt powered devices did ..
Maybe we have differing requirements regarding dynamics and realism, never had or heard batt powered devices sound better.
BTW any SS amp worth its salt is using regulation in the driver stages ..
Regards
Last edited:
An Altec dual FLH at his client, powered by a Kaneda amp 15w. None were batt powered his field coil tweeter was
The Hiraga is Class A where current draw is constant regardless of output power demands…Rowlands were quite different…and soft like you say.
Like these ?
Altec Assault and the Magic of Misho – Zero Distortion
zero-distortion.org
Also looks like you been holding out on your Altec 515B setup ...!
Last edited:
First of all, Hiraga is not only battery operated. The trick is to get the best out of both worlds. Quick response (capacitors) and big energy storage (battery). If you use it cleverly, you have a very low internal resistance of the power supply across the entire audio band. For example, the monstre power supply here.
P.S
a battery is superior to any capacitor at low frequencies, and a capacitor conversely at high frequencies
Last edited:
Similar threads
