Octave CAT SRM Model 1853 – Vintage Analog Synthesizer (Mk II)

A bold, duophonic analog classic with a reputation for massive tone and underrated flexibility.

This is the Mk II version of the legendary Octave CAT — a U.S.-built synth from the mid-to-late 1970s that offers two VCOs with saw, square, and triangle waveforms (VCO 1 only), cross modulation, oscillator sync, and mixable waveforms. With duophonic capabilities and a famously powerful filter section, the CAT delivers deep bass, snarling leads, and complex drones with ease.

Key Features:

• Two VCOs with independent modulation routing
• Oscillator sync, cross-mod, and sub-octave options
• VCF with audio-rate modulation and noise source
• SRM (Series Revision Model) Mk II panel layout with white-only graphics
• Bypass switch, modulation source selectors, and fine-tuning control
• Serial number B4046

This unit is fully functional and sounds incredible. Cosmetically, it shows normal wear for its age, but everything works as intended.

An increasingly rare and highly regarded U.S.-made synth that stands tall next to the Minimoog, ARP Odyssey, and Pro-One — but with its own unique voice and vibe.

Includes:

• Synthesizer with attached power cord

• At Tone House, we're not just sellers, we're passionate musicians, gear aficionados, and seasoned professionals dedicated to the craft of making music. We take pride in our curated music collection. We love giving these vintage and rare pieces new life through maintenance and upkeep. Our goal is for these units to be at their optimal performance before going to their new homes.  Every item you acquire from us undergoes a meticulous inspection process conducted by our team of enthusiasts, studio engineers, and live performers. With full-time technicians on staff, rest assured that each piece is thoroughly examined and tested before being professionally packed.

All orders placed by 2 pm are processed the same day. This ensures that your gear is swiftly prepared for shipment, guaranteeing prompt delivery in the condition promised. Once your order is in transit, automatic tracking information is provided, allowing you to monitor its journey from our shop to your doorstep with ease.

The units/items you see in our pictures are precisely what you'll receive. Have questions? Feel free to ask before making a purchase. Additionally, we offer custom modifications, within reason, to many of the guitars and products we sell, ensuring they perfectly suit your unique requirements.

Our dedication to your satisfaction doesn't end with the purchase. We value your feedback and strive for excellence in every transaction. If, for any reason, you're not completely satisfied, please reach out to us before leaving feedback. Your happiness is our priority, and we're here to ensure your musical journey is nothing short of exceptional.

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Please note that additional shipping charges may apply to buyers in Hawaii, Alaska, Puerto Rico, and the Virgin Islands. Feel free to contact us for shipping rates before making your purchase.

For Returns: Your satisfaction is our priority. If for any reason you're not completely satisfied with your purchase, please don't hesitate to reach out to us via message. We're here to address any concerns and ensure you have a positive experience with Tone House.

AW