Peavey Triple X - line out

I am not a guitar guy. But I am trying to run my guitar players guitar through our PA, and his direct-out does not seem to be working properly. it is putting out a very low signal and is the same, no matter what the volume level is on the output volume control. It is a Peavey Triple X. Is it

NAD Peavey XXX (PV Addiction)

Excellent condition PV XXX with foot switch. This is a three channel amp with 120 watts of power. Newer tubes with minimal hours. Has 2x12 Scheffeld

Peavey Triple X 2x12 Combo

Used Peavey LIKE NEW PEAVEY TRIPLE XXX 2X12 - Sweetwater's Gear Exchange

Stream Preamp Pedal Tube Power Amp (Peavey Triple X) by Airis Effects

Best-Tronics Mfg., Inc. > Peavey Amp Cables > Custom Switching Cable for Peavey Triple XXX and JSX Amplifiers

Operating Theatre: Peavey XXX – Doktor Ross Sewage

SOLD Peavey Triple XXX, new KT77's- looking 4 Edwards Custom

Any Love for the Peavey XXX?

Go from the clean channel, push in the crunch button and you will see why ! This amp does overdrive / distortion really well ! It's very muscular,

Peavey Triple XXX 40W Tube Guitar Amp Amplifier Combo. High gain, crunch! EVH

Triple XXX Head - Peavey Triple XXX Head - Audiofanzine

Peavey Triple X : r/GuitarAmps

The Peavey Triple X has got some serious high gain tones.. : r/metalguitar

Peavey Triple XXX Tube Set - AmpTubes for all your tube needs.

Changed the look of my Triple XXX : r/GuitarAmps