# Aleph 3 how is power 4 ohm

#### saperusa

In the aleph3's manual is written the peak power on 2 ohm :120 watt.
On stereophile the graphic is that an aleph3 give 32.8 on 8 ohm
55.8 on 4 ohm and 40.. on 2 ohm.
Ok but this is with a sinusoidal signal but what is the power impulsive on 2-4-8 ohm
it's because in the manual is written that the max output is 8 amp and 23 volt.
I can understand (but I know that is not so) the aleph3 give with an impulsive signal
120 watt on 2 ohm
240 watt on 4 ohm

It's impossible I know...
but what is real the power on the aleph3 in this condition?
Someone can help me?

#### jacco vermeulen

If power is not limited by current it is voltage limited.

23x23/4=132 W.
240Watts (4 ohm) requires 31Vdc rails, which the Aleph 3 does not have.

1 user

#### wuffwaff

Hi,

there is nothing like dynamic power or peak power with an Aleph. Max. power is only determined by the bias current, the current gain setting and the voltage.

There´s a spreadsheet for the Aleph where you can set these and calculate the aprox. power output into different loads. Here you can see the effects of different voltages, bias currents etc.

Can´t find it at the moment but I think it was called Aleph-power.xls or something like that.

William

1 user

#### MEGA_amp

Paid Member
Just make sure you input correct information....or William will come after you.

#### Attachments

• aleph-power.zip
11.3 KB · Views: 208

#### Babowana

When the speakers have low impedance, the max current is matter.

A3 has current limit of about +/-8A. I.e. Power = (8/1.4)^2*2 = 65W. But, considering maximum reasonable distortion of 1%, the max power @2ohms could be 60W.

The service manual says 60W@2ohms.

If Stereophile say 40W@2ohms, they might have considered at a bit lower distortion level.

In the similar way considering voltage, current, impedance and the distortion level, the same manual says 60W@4ohms.

Hmm . . .

1 user

#### Nelson Pass

Paid Member
saperusa said:
In the aleph3's manual is written the peak power on 2 ohm :120 watt.
On stereophile the graphic is that an aleph3 give 32.8 on 8 ohm
55.8 on 4 ohm and 40.. on 2 ohm.

My copy of the manual is 30, 60, and 60 watts and I can tell you
that the 4 and 2 ohm figures are with some serious distortion.

I believe Stereophile evaluates the wattage at 1% THD.

And of course all of those numbers mean that you can expect a
peak of twice those values.

1 user

#### saperusa

Thank You Mr Pass.

Sandro

#### Bumble 1

Hi.sorry I am late to the party, but will the Adelphi 3 cope with Lowther DX3 drivers wired in parrallel. So 4 ohm nominal load. or will this push the output a little and kick in the thermal safety?

#### Zen Mod

Paid Member
Aleph 3 is capable to push parallel Lowthers out of their thermal safety

1 users