So why are clipping indicators not standard on amplifiers in 2026?

[Chr1]

(Preferably with the option to turn them off for aesthetic reasons.)

So I don't get it. They can't cost much to implement, and have been standard on most pro-audio amps for many years.
So, have we been duped by the home hifi industry?
Obviously I can understand why manufacturers may not want us to know their product is struggling, but it seems like a fairly basic and important functionality/feature to me.

Or no?

 

[KSTR]

Obviously I can understand why manufacturers may not want us to know their product is struggling,

This is the #1 reason, definitely. I once found myself in the situation (as an engineer) where I proposed a clipping indicator -- because the modules we were using had a monitor pin for that -- but marketing barked "Never ever you put clipping indicators in an amp! No-one else does it and we won't start with it."

 

[Chr1]

Yes. Seems to me to be the "emperors new clothes" of the hifi world.
I get that it's probably overkill for lifestyle things like Sonos etc, but for proper hifi gear, seems like a no-brainer to me.

Hate to use the dreaded car analogy, but it's kinda like a performance car without a tachometer.
Very odd.

 

[LTig]

My active speakers (K&H O300D) indicate clipping of the power amps by flashing the iluminated Logo, and I think the Neumann KH310 does the same.

 

[audio_tony]

There's also the matter of calibration. And impedance. For a power meter to be accurate, it needs to be calibrated against a given impedance.

If the impedance changes, the calibration is lost. And most speakers don't maintain a constant impedance vs frequency anyway.

 

[Talisman]

(Preferably with the option to turn them off for aesthetic reasons.)

So I don't get it. They can't cost much to implement, and have been standard on most pro-audio amps for many years.
So, have we been duped by the home hifi industry?
Obviously I can understand why manufacturers may not want us to know their product is struggling, but it seems like a fairly basic and important functionality/feature to me.

Or no?

I keep wondering about it. It seems so simple to implement and so useful to have. However, it's almost impossible to find in any amplifier. Absurd.

 

[KSTR]

There's also the matter of calibration. And impedance. For a power meter to be accurate, it needs to be calibrated against a given impedance.

If the impedance changes, the calibration is lost. And most speakers don't maintain a constant impedance vs frequency anyway.

Well, a proper power actually measures delivered real power to the load, by multiplying instantaneous voltage and current, then averaging the result.

 

[Digital_Thor]

I guess a fully active speaker solution has this build in, more like a limiter, avoiding the end user to reach that limit.
I have around 4kW into 8 ohms for 3 way mains and 4 subwoofers... Power is cheap and with gain set to a level where drivers won't burn up and I won't become deaf... Clipping should be the least of my problems.

But a basic NAD amp from the 90's had this feature, so that difficult speaker loads wouldn't rip the back bone right out of the amplifier and drive it into distortion.
We have oceans of proof and measurements to avoid bad amplifiers and poor speaker cross overs.... Just skip the bad ones, and be happy with all the great gear available today. There's loads of equipment where clipping should not be a problem for most normal usage.

 

[Bwaslo]

The speaker impedance wouldn't matter. A clipping indicator for an amp with feedback need only sense when the signal after the first stage peaks up above normal, i.e., when the amp can no longer make the output voltage follow the input. Or otherwise detect when the output can'y follow. It would also need to extend the indicator "on" time, as clipping might be only microseconds while it might take half a second or so for a person to be able to see it for sure.
(I've designed such a circuit, it's not too difficult).
But in a showroom, an amp mfgr wouldn't want to highlight what their amp can't do, maybe that's whily they're rare.

 

[NTK]

Yes. Seems to me to be the "emperors new clothes" of the hifi world.
I get that it's probably overkill for lifestyle things like Sonos etc, but for proper hifi gear, seems like a no-brainer to me.

Hate to use the dreaded car analogy, but it's kinda like a performance car without a tachometer.
Very odd.

The clipping indicator is literally the amplifier flashing at you telling you that it is inadequate for the job you are asking it to do, and you would be better served with a different and more powerful amplifier, perhaps also from another manufacturer.

 

[DVDdoug]

I don't get it either...

Peak power meters would also be useful.

P.S.
Years ago I built an amp with wide-range LED peak power meters and clipping LEDs. And an indicator if the DC protection kicked-in.

 

[boXem]

Some of our amps have a clipping indicator. Never got a complaint up to now.

 

[Talisman]

The clipping indicator is literally the amplifier flashing at you telling you that it is inadequate for the job you are asking it to do, and you would be better served with a different and more powerful amplifier, perhaps also from another manufacturer.

So we shouldn't put tachometers on cars because if you're at the limit it means you need another car? (Maybe another brand)

 

[babadono]

On the Crown D75 amps that I refurb'd a few years back the "IOC" red Led was coming on at about -10db. I changed it so it comes on at clipping or much closer to clip. These amps also have a green Led that modulates intensity dependent on signal level. Did not make sense to me to have another Led that comes on at -10dB.
Agree with OP clipping indicators are good to have.

 

[NTK]

So we shouldn't put tachometers on cars because if you're at the limit it means you need another car? (Maybe another brand)

Totally different application. The tachometer guides you to apply the throttle to optimize for the best performance. You don't do that with audio amplifiers.

[Edit]
I should add there are plenty of good reasons for the user to want clipping indicators. Just that from the manufacturers' point of view, there are also plenty of downsides to it.

And since there isn't a universal standard to define what counts as clipping, manufacturers can also game the system. For example, how is clipping defined and what is the clipping threshold? Does the indicator turn on immediately, or there is also a minimum clipping duration before the indicator turns on? How long the light stays on when a clipping event is detected, e.g. a 1 ms clip will light up the led for only 1 ms? Etc.

 

[babadono]

O

The clipping indicator is literally the amplifier flashing at you telling you that it is inadequate for the job you are asking it to do, and you would be better served with a different and more powerful amplifier, perhaps also from another manufacturer.

Or TURN IT DOWN wildman

 

[mainframe]

Its all about marketing see, you need to call the indicator something bad-ass like "Hyper drive" or "Redline" instead of weak ass clipping

 

[Devnull]

And if you're going to do clip indicators like pro sound why not soft clip limiters? More useful to the majority of the end users than a blinking LED.

 

[DVDdoug]

And if you're going to do clip indicators like pro sound why not soft clip limiters?

As long as the soft-limiter has an indicator. We need to know if we are hitting the limits, or not.

 

[tineared]

My rule of thumb is calculate the amplifier power you need and then double it.
I have had amps shut down from overheating, but I have never driven one into clipping
Just sayin'