🙋🏻‍♂️ Welcome and Foreword

Hello and welcome to my Reverb Shop!

Thank you for your interest in this listing. Every instrument I offer comes from my private collection and is treated with great care and respect. Each instrument is thoroughly checked and tested to ensure full functionality and excellent condition. Before any instrument is listed for sale, it goes through a professional multi-stage inspection by our technician. Only after successfully passing all functional and visual checks is it approved for listing. I am aware that my prices may be above average, but this reflects my commitment to transparency, careful preparation, and customer satisfaction. Packaging alone takes 2–4 hours, with multiple layers of protection to ensure safe and worry-free transport. Quality — both of the instruments and my work — is my top priority. I am always available to answer questions and ensure a smooth buying experience.

Enjoy reading the description.

🎹 Information about the Item for Sale

I am offering a Yamaha CS-40M, a powerful and increasingly hard-to-find vintage monophonic analog synthesizer from the late 1970s. The CS-40M is a standout in the legendary CS series, offering a dual-VCO architecture that provides incredibly thick, rich, and harmonically complex tones. It is known for its ability to save patches—a rare feature for analog synths of its time—making it a perfect bridge between classic hands-on control and modern workflow. This particular unit stands out due to its robust build quality and the iconic, creamy Yamaha filter sound, making it especially attractive for collectors and producers looking for that authentic 70s analog grit. Technically, this Yamaha CS-40M is in very good condition and fully operational.

All keys, switches, sliders, potentiometers, and internal memory functions have been checked and cleaned, ensuring reliable and smooth performance. Optically, the instrument shows normal signs of use consistent with its age, but remains in a very well-preserved overall condition. Its classic design with wooden side panels gives it a unique and elegant vintage appearance.

Please note: this listing includes the instrument itself and the power cable. No additional accessories such as stand, legs, or case are included unless explicitly stated.

⚙️ Specifications

• Type: Monophonic/Duophonic Analog Synthesizer

• Manufacturer: Yamaha

• Model: CS-40M

• Era: Late 1970s (1979)

• Keyboard: 44 keys

• Sound generation: Analog (2 VCOs, 2 VCFs, 2 VCAs)

• Patch Memory: 20 user-programmable patches

• Controls: Extensive sliders and knobs for real-time sound shaping

• Effects: Ring Modulator, LFO, and multi-mode filtering

• Special feature: Dual-VCO architecture with patch memory capability

• Sound character: Warm, thick, organic, and classic Yamaha analog tone

The Yamaha CS-40M is appreciated for its unique tonal character and versatility, making it a highly desirable piece for collectors and serious analog enthusiasts.

📹 Video Before & After Purchase

Any interested buyer is welcome to request a video demonstration of the instrument.

Additionally, each buyer receives a detailed functional check video before shipping, so you can see and hear your Yamaha CS-40M in operation. If any issue is discovered during the inspection, the instrument is immediately handed over to our technician.

💲 Prices

It is very important that my instruments go into good hands.

• Price proposals are welcome

• If you are seriously interested, feel free to make an offer

• Reasonable proposals will always be considered

⚠️ Information

• All instruments come from my private collection

• The collection is continuously updated

• Each instrument is cleaned, tested, and carefully prepared for sale

• Instruments are protected against dust and damage

📦 Secure Packaging

• The instrument is carefully packed to ensure safe transport

• Multiple protective layers are used

• Fully insured shipping

💢 Shipping

• Best, fastest, and safest shipping option selected depending on destination

• Fully insured shipping

• Export documentation included if required

⚡ Power and Connection

• EU power connection

• Non-EU buyers can use a suitable adapter or voltage converter if needed

💯 Your Advantages

✅ Professionally checked instruments

✅ Tested and cleaned

✅ Worldwide insured shipping

✅ Export documents included

✅ Verified seller

✅ Secure payment

✅ Animal-Free & Non-Smoking Household

⛔ What are you waiting for!?

The Yamaha CS-40M is a powerful and unique vintage analog synthesizer with classic 70s character — ready for your studio or collection 😉