Ohio Sound - PX 1200 / 2-Channel Class AB Solid state power amplifier
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Ohio Sound PX 1200 two-channel Class AB power amplifier, 1 item, weight 10 kg, excellent physical condition, tested and working, with new power cord and DIN adapters, featuring two illuminated VU meters, brushed silver front panel and wooden cabinet.
AI-assisted summary
Description from the seller
This is a vintage Ohio-Sound PX 1200 power amplifier from the 1970s or 1980s, manufactured by the Dutch company Ohio Sound of Tilburg (part of Jac van Ham Automaten).
Device features:
• Brand: Ohio-Sound
• Model: PX 1200
• Type: Power amplifier with two analog VU meters (Left Channel and Right Channel)
• Design: Brushed silver-colored aluminum front panel, side handles, and wooden top and side panels.
• Connections & Controls: Headphone jack, volume step attenuator (Input Level), and various toggle switches for protection and speaker settings. Loudness does not do much in my opinion .
New powercord and VU lights.
Contacts cleaned
Bias checked correct
PA amp is very suitable for hifi home use (class AB) and passive cooling. And is looks fantastic!
I recommend a pre amp or source with eq and volume control.
As documentation regarding Ohio-Sound from the 1970s is very scarce and no digital records were kept at the time, exact factory specifications are limited. However, technical discussions on the Dutch Transistorforum audio platform provide a clear picture of the internal construction and specifications:
Technical Specifications (Ohio-Sound PX 1200)
• Device type: Stereo Power Amplifier
• Transistors (Output stage): The original output stage utilizes four 2N3055 power transistors. This type of transistor is renowned in the vintage audio world as a legendary and extremely robust classic.
• Estimated Power Output: Although the model number "1200" might suggest modern PA wattage ratings, the actual continuous power (RMS) for this type of vintage circuit design—using the 2N3055 configuration—typically ranged from 2 x 60 to 2 x 100 watts at 4 to 8 ohms. At the time, this was more than sufficient to drive powerful speakers in hospitality venues or living rooms.
• Indicators: Two large, illuminated analog VU meters (up to +3dB / 100%).
• Channels: Fully independent control for the left and right channels via Input Level knobs.
• Protection: Equipped with a built-in electronic protection circuit (Protection LED on the front panel).
• Housing: Premium wooden cabinet (woodcase) featuring a thick, brushed aluminum front panel and heavy-duty chrome handles.
Including din adapters
Carefully shipped
Seller's Story
With a passion for technology and sound, we offer a varied selection, mainly of analog audio equipment, for every budget. Everything is checked, tested, cleaned, and usually refurbished as well. Shipping in sturdy packaging and pickup is always possible near Hoorn/Alkmaar.
Translated by Google TranslateThis is a vintage Ohio-Sound PX 1200 power amplifier from the 1970s or 1980s, manufactured by the Dutch company Ohio Sound of Tilburg (part of Jac van Ham Automaten).
Device features:
• Brand: Ohio-Sound
• Model: PX 1200
• Type: Power amplifier with two analog VU meters (Left Channel and Right Channel)
• Design: Brushed silver-colored aluminum front panel, side handles, and wooden top and side panels.
• Connections & Controls: Headphone jack, volume step attenuator (Input Level), and various toggle switches for protection and speaker settings. Loudness does not do much in my opinion .
New powercord and VU lights.
Contacts cleaned
Bias checked correct
PA amp is very suitable for hifi home use (class AB) and passive cooling. And is looks fantastic!
I recommend a pre amp or source with eq and volume control.
As documentation regarding Ohio-Sound from the 1970s is very scarce and no digital records were kept at the time, exact factory specifications are limited. However, technical discussions on the Dutch Transistorforum audio platform provide a clear picture of the internal construction and specifications:
Technical Specifications (Ohio-Sound PX 1200)
• Device type: Stereo Power Amplifier
• Transistors (Output stage): The original output stage utilizes four 2N3055 power transistors. This type of transistor is renowned in the vintage audio world as a legendary and extremely robust classic.
• Estimated Power Output: Although the model number "1200" might suggest modern PA wattage ratings, the actual continuous power (RMS) for this type of vintage circuit design—using the 2N3055 configuration—typically ranged from 2 x 60 to 2 x 100 watts at 4 to 8 ohms. At the time, this was more than sufficient to drive powerful speakers in hospitality venues or living rooms.
• Indicators: Two large, illuminated analog VU meters (up to +3dB / 100%).
• Channels: Fully independent control for the left and right channels via Input Level knobs.
• Protection: Equipped with a built-in electronic protection circuit (Protection LED on the front panel).
• Housing: Premium wooden cabinet (woodcase) featuring a thick, brushed aluminum front panel and heavy-duty chrome handles.
Including din adapters
Carefully shipped
Seller's Story
With a passion for technology and sound, we offer a varied selection, mainly of analog audio equipment, for every budget. Everything is checked, tested, cleaned, and usually refurbished as well. Shipping in sturdy packaging and pickup is always possible near Hoorn/Alkmaar.
Translated by Google TranslateDetails
Era
1900-2000
Brand
Ohio Sound
Model
PX 1200 / 2-Channel Class AB
Multiple models
No
Physical condition
Excellent
Number of objects
1
Includes
Power cord
Weight
10 kg
Functional condition
Tested and working/playable
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