Vox Series 90 V131 Powered Speaker: Close Up
1969 - 1971







The V130 Series 90 powered speaker cabinet was a close cousin to the Vox V4131 Royal Guardsman cabinet offered by Vox from 1966 to 1968. Like the V4131 Royal Guardsman cab, the Series 90 V130 cab had two 12" Celestion Alnico "Silver" loudspeakers rated at 25 watts RMS each. Both featured a mid frequency horn, although the Series 90 V130 cab replaced the Goodmans Midax horn originally used in the V4131 Royal Guardsman cabinet with a similar but shorter horn made by Celestion. Both cabinets were the same size and shared the same tubular steel chrome plated swivel trolley.

Unlike the V1133 Royal Guardsman head and V4131 Royal Guardsman speaker cabinet it replaced, the audio output amplifier and power supply sections were mounted to the floor of the closed back speaker V131 enclosure. Assembling the amplifier in this fashion broke tradition with the conventional amplifier design concept that included the audio output amplifier, power supply, and control section circuits inside the amplifier head cabinet. As the V131 cabinet is mounted to a swivel trolley with casters, the additional mass of the audio output amp and power supply was shifted to "rolling" weight in the speaker enclosure rather than "hand carried" weight of the amp head.

Thomas Organ claimed a 65 watts RMS, 130 watts peak power rating for the V131 powered speaker cabinet at 4% total harmonic distortion at 1 kHz. While this might seem to be a slight increase of power over the 60 watt RMS, 120 watt peak power of the V1133 Royal Guardsman head the V131 replaced, it probably wasn't. The 60 watt RMS power rating of the Royal Guardsman head was measured at 1% total harmonic distortion at 1 kHz. I believe Thomas Organ squeezed out the extra 5 watts of RMS power by allowing a 3% higher total harmonic distortion level in their V131 output power measurements.

The back of the V131 enclosure featured a recessed control panel, as seen above. The left side of the control panel included an octal socket that connected to a cable that was hard wired to either the V132 or V133 preamp heads. This socket served two purposes. It supplied operating voltages to the preamp head and received the audio signals sent from the preamp head back to the V130. The rear control panel also included a 1/4" input jack with a volume control (Vox suggested this could be used to amplify a tape recorder), a 1/4" output jack for a remote amp and a 1/4" output jack for a remote speaker. It also included a line reverse switch, red power indicator lamp, power switch, fuse holder, and 120 volt convenience outlet.

The AC power cord came out of the lower right corner of the back. A metal cord reel mounted on the enter of the back secured the AC power cord for transport.

Dimensions (less trolley) and Weight: 31" H x 27" W x 10.5" D, 85 pounds




North Coast Music offers many officially factory licensed replacement and restoration parts for the Vox V131
Series 90 powered speaker. Some are shown below.
























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