Happy New Year!
If you are handy with a soldering iron, Nelson Pass Class A single ended mosfet design kit has a wonderful tube like sound and works well with compression drivers.
I use these on JBL 4722's 2453h-SL CD and sound smooth, but detailed. They are a good match for compression drivers due to their low voltage gain, so you don't need to pad them down, just a protection cap for turn off thump. The stock Meanwell power supply is low noise - I have to put my ear near the mouth of the waveguide to hear a faint hiss.
Good luck with whatever you choose!
Yeap 60 watts are more than enough for me ! What i want is good sound and safe operation. My 35wpc of my tube watts are enough but i wouldnt say no ti 60wpc !
Thanks
Thanks for the motivation! I have a pair of the Amp Camp kits that have been sitting around for some months, unbuilt - I'm remodeling my music room, but am hopeful that I'll have time to fit in an amp build between finishing the remodel and Spring chores starting - glad to hear you like them
That the internet contains a blog documenting your life does not constitute proof that your existence is valid. Sorry.
When using an amp directly coupled to a high sensitivity horndriver, what spec is most important to look at?
Is it the Signal-to-Noise ratio?
Which value is sufficient to keep it quiet? 90db a-weighted?
Could you list the ones that are available new please?
@ Pos & Bubbleboy:
Does the THX AAA 789 really handle an 8ohm load of a compressiondriver? It looks like it is only specifid for 16ohms minimum...
Have you driven these with serious spl levels yet? Or are these only suitable for moderate listening levels?
The Pass Labs XA25 is likely one of the best amps ever made for this application.
https://www.passlabs.com/amplifier/xa25
https://www.stereophile.com/content/...ower-amplifier
https://6moons.com/audioreviews2/passlabs3/1.html
Widget
8 ohm nominal (so around 6 ohm min for a typical JBL compression driver) is definitely too low for that amp.
A LPUHP amp would be a better match.
The THX is the perfect match for a 16 or 32 ohm compression driver, and will let you reach 105dB SPL/1m no problem after constant directivity equalization (on sinusoidal signals, and much more on real-world signals given the typical spectral power distribution of music).
16 ohm JBL compression drivers have a minimum impedance of around 12 ohm in the passband (Re might be lower, but is irrelevant here).
Bubbleboy is running his 16 ohm 476Mg with the THX. I think he uses the SE output.
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