More than once there was the question for a small class A amp, which is sufficient for an actively driven compression driver - at least at home .
This amp seems to suffice:
JEAN HIRAGA'S LE MONSTRE / MONSTER(link)
____________
Peter
More than once there was the question for a small class A amp, which is sufficient for an actively driven compression driver - at least at home .
This amp seems to suffice:
JEAN HIRAGA'S LE MONSTRE / MONSTER(link)
____________
Peter
Hello Peter
Have you built it??
Rob
"I could be arguing in my spare time"
Rob,
this circuit I have not built, I just found it during the free days.
But as I have some insight into amp circuitry, it looks very reasonable for me.
The first four transistors form a buffer, which is mentioned here:
Cheap Chinese Electronics: Fet Buffers (Link)
Then follows a symmetrical stage with complemetary darlingtons.
For the Hiraga's monster there are many links (Google).
Circuit board:
http://www.kk-pcb.com/hiraga.html
(additional: transistor substitutes)
I thought it would be passable to post.
____________
Peter
Certainly just wondering if you have heard one??I thought it would be passable to post.
Rob
"I could be arguing in my spare time"
If you look a little harder you will find a more up to date version. Same circuit but with more modern components.
HI all,
I have eard this amplifier in Paris, on a Onken : Western electric Horn system.
Jean HIraga decides to create this circuit after viewing a prototype of a HUGE class A amplifier, but with only one transistor and a very low power output, designed by STAX ( in the past they made class A amplifier).
THe monster is a "3OO B" equivalent in the conception , perfect for use in the mid in high of a "horn system.. If i remenber, price of the component is cheap, but you have to realise a very HUGE power supply, with a large value of caps........some audiophiles réalised it with battery supply....
Tell me (us) more if you try this scheme, i am interested for my 2441 and 2405 in a multi-amp solution..
regards
Bruno
But you still need a capacitor for protection of the driver.
In such a two way design for compression driver the limiting factor is the sensitivity of the overall system. The more sensitive the system the less bebefit there is for biamping particularly if you already have a large enough class A amplifier ie 25-50 watts.
I mention this because people debate the benefit of biamping the 4435.
I also would not underestimate the benefit of using class A for the woofer, the improvements are quite noticable over conventional amplifers.
Larger class A amplifers have higher DC bias and this directly proportional to sound quality.
Therefore in practise a larger class A amplifier has more virtues for non biamped applications.
Hi Peter & Bruno,
....my best greatings for/in this new year ...
FYI,
I built 15 years ago my 4xmonsters with Kaneda pré-amp and his 4 way actif filter.
This (big) system drive my 4 way horn (home made) system.
Oversized Klipsch, WE66A, Iwata 2 inch, and Iwata 1inch ....
A very good audio experience (and symbiose monster/horn).
Caps 1 (one) farad, with power off I had music for appr. 45 sec ...
First a run it with flaoting-battery (very expensif in electricity), after that with a 600VA transfo.....
With only 5Weff (for the low) I had appr. 110dBA (in my living/listeningroom).
The monster Dc output is very stable in the "low". (....near 0,001Vdc).
The concept is very good for high efficient (multi) systems.
At this moment the monstersystem is in "parking" and i use a (home made) OTL T12 .
If yo can built "the" monster ....do it....with plenty caps ...Its great music.
Allez salukes.
Karel
(I can sent pict's)
I'm not sure if I'm posting a query on the right forum but nevertheless, decided to post it any ways.
I've got 15" Tannoy Monitor Gold drivers and have made GRF cabinets for them.
I intend to join a group build of Indian DIY enthusiasts for making the Le Monstre amp.
How would the pairing be. Has anyone experimented?
I'd be obliged to get some pointers.
I am not familiar with Le Monstre, so I cannot comment directly. From experience though, there are very few solid state amps that suit the Tannoy Monitor Golds better than the appropriate tube amp.
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