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Topics - Zozobra

Amplifier Discussion / op amp voltage and tone
March 20, 2023, 05:41:32 PM
I was just idly thinking about the effect of op amp voltage on tone. Most op amp preamps typically use ±15V rails as that's the limit of the TL072 op amp commonly used, but is it an anachronism to be limited by this when there are modern op amps capable of higher rail voltages? Something like the OPA552PA is capable of ±30V, but all other things considered would it sound any different than if it was capped at ±15?
Preamps and Effects / LND150 Jose style preamp
June 27, 2019, 11:56:19 AM
Hi folks,

I've been pushing the peas around the plate on an LND150 version of some of the newer Jose style diode clipper amps based on KMGs work.  This is loosely based on Ch.2 of the Butterslax.  I'm handling the output buffer on a second board using a quad channel opamp so that I can add in an active Baxandall tonestack should I decide to use an SS poweramp and want pseudo presence & depth controls.

Here is what I have thus far.  Comments and criticism welcome :)

Amplifier Discussion / Orange CR120 power amp
November 13, 2018, 09:53:50 AM
I'm certainly finding myself drawn towards the old SS or hybrid stuff these days and I want to have a crack at making a reasonably high powered power amp early next year.  While doing some digging I came across some gut shots of the Orange CR120 with a good close up of the power amp, this interests me as it looks like it could be pretty simple and the amp sounds good and is loud enough for my needs.

shot here:

First guesses is that it's a pair of TDA7294 chips bridged.  The amp is rated for 120W into an 8 ohm load, which is also the minimum load which looks about right for a pair of those chips.  The bottom left of the board looks to largely deal with the supply rails for the preamp and I'm guessing the 3rd large device bolted to the heatsink is a bridge rectifier for the power amp?

So to the trained eye does there look to be anything particularly interesting going on here, or is it just a pretty vanilla TDA7294 bridged circuit?