2nd speaker out to cab from PS-2a while recording direct

Hello,

I plan to get a PS but still deciding on which to get.
I plan to use mine with tube amps, a Kemper and preamps.
I watched this video from 10 years ago and that all makes sense to me but I had a question about using the 2nd speaker out connected to a real cab so I can hear that if I wanted. Maybe not practical but I was thinking that this might be something that is possible if I find I ever wanted to do this. I see that the PS100 has only one speaker out ATM. any plans to add a 2nd?

Fryette Power Station “Self Attenuation” Feature!! - YouTube

Thanks
Brian

Hi Brian,

No immediate plans to update the PS-100 with a second SPKR OUT that I know of. But I always make a note of these things so you never know for the future.

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thanks for the reply dan.

i have been doing more reading since i posted this. i did find an interesting thread (that i cannot find now) where someone took the speaker out into a cab and then the parallel out back into the PS.

not sure what i mentioned is worth it or if i would ever need to do it.

when i find that thread i will post a link here in case someone is interested.

brian

Yes you can do that, I probably should have mentioned. Cabs are connected in parallel, so anyway to get a second jack socket if fine!

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Hi,

I am reviving this thread since it is not that old AND I forgot to ask the question I really wanted to verify.

I now own a new PS-2A thanks to Alex at Vintage King.

My question is meant as clarification really based on other threads I have read as well as the manual.

I want to use the PS-2A with my Carvin Quad in Self-Attenuation mode and have a 16Ω cab connected to SPKR OUT TWO.

My understanding that the SPKR OUTs are in parallel so is the correct for both 16 and 8Ω speaker cabs?

16Ω Cab

Quad-X Pre-Amp Out>PS2A Line IN>SPKR OUT ONE (16Ω)*>AMP IN (8Ω)>SPKR OUT TWO (16Ω)>16Ω cab

8Ω Cab

Quad-X Pre-Amp Out>PS2A Line IN>SPKR OUT ONE (8Ω)>AMP IN (4Ω)>SPKR OUT TWO (8Ω)>8Ω cab

*where 8Ω or 16Ω in parenthesis (8Ω) or (16Ω) represent the Fryette SPEAKER 1/SPEAKER 2 switch positions.

Thanks
Brian

Hi @llTheSystemll

Let’s make the reactive load the same impedance as your 16 Ohm cab, so set AMPLIFIER Impedance Selector to 16 Ohms. Now the total load on the PS-2A’s power amp will be your 16 Ohm cab + the 16 Ohms reactive load; this is 8 Ohms, so set SPEAKER Impedance Selector to 8 Ohms.

With an 8 Ohm cab move SPEAKER Impedance to 2/4 and AMPLIFIER to 8.

Thanks dan. Visuals always help me.

Self-attenuation seems like it might be great subject to add to the manual to cut down on these types of questions IMO. i have seen the videos but i have not seen one asking about the addition of a cab.

I did see this thread where the person was doing what i plan to do BUT this person used the same impedance on the AMP IN (reactive load) and the SPKR OUT.

I was under the impression that when a speaker cable is connected to SPKR OUT ONE, the RL part of the PS is Bypassed and without a speaker cable connected to SPKR OUT ONE, the RL cannot be Bypassed. This is done to avoid damage to the connected amp as in the RL part of the PS cannot be Bypassed no matter what to avoid damaging the amp.

Page 6

The SPEAKER 1 jack has an open load protection feature. If no cable is connected to this jack the Power Station will remain locked in BYPASS/STANDBY mode regardless of the front panel Standby switch setting.

I saw that thread after my last post and I thought that maybe the switch settings should be the same after all like in that thread.

So the RL is not Bypassed ever?

Brian

You’re welcome!

Yes, SPKR1 will force the PS-2A into BYPASS (i.e. standby) when disconnected: toggling between OPERATE/BYPASS on the front panel will have no effect. This protects the PS-2A’s tube power amp from being unloaded (open load condition).

AMP IN is always connected directly to the reactive load in OPERATE. In this way your amp can never see an open load. In BYPASS it connects to your speaker (SPKR OUT).

So in self-attenuation mode, connecting SPKR1 to AMP IN the PS-2A’s tube amp will always see a reactive load when in OPERATE or in BYPASS. If you also use SPKR2 it will see reactive load in parallel with your speaker.

You can still put the PS-2A BYPASS if you wish. This is just like standby in a tube amp. It turns off the high voltage to the power tubes so whether it sees a load or not, it does not matter.

Dan

Thanks for explaining how that works in detail.

Got it.

Brian

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