Audio Design Associates MCP-1

from what I have researched this is the unit the McIntosh used the design on their pre-pre amplifier (head amp) 
 

Type:

Moving Coil (MC) preamplifier / head amplifier designed to boost low-output MC cartridge signals.

 

Input Impedance:

• 10 Ω / 20 Ω / 40 Ω / 90 Ω selectable (input impedance matching to MC cartridge).

 

Gain (approx.):

• 30 dB @ 10 Ω

• 26 dB @ 20 Ω

• 20 dB @ 40 Ω

• 13 dB @ 90 Ω

 

Frequency Response:

• +0, -0.5 dB, 20 Hz – 70 kHz

 

Total Harmonic Distortion (THD):

• ≤ 0.01 %

 

Signal-to-Noise Ratio:

• 83 dBA (ref: 500 µV input @ 1 kHz, 10 Ω, RIAA)

 

Phase Shift:

• Non-inverting

 

Channel Separation:

• > 90 dB (20 Hz – 20 kHz)

 

Power Requirement:

• 85 – 135 V AC, 50/60 Hz, 2 W

 

Semiconductor Complement:

• 22 Bipolar Transistors

• 2 Integrated Circuits

• 11 Diodes

 

Mechanical (Approx):

• Size: ~180 mm W × 80 mm H × 110 mm D

Terms & Conditions

Item Condition

All items are pre-owned / vintage audio components unless otherwise specified. All units are tested prior to shipment and described accurately to the best of our ability.

1 Year Limited Warranty

Warranty covers:

✔ Internal functional or electronic failure not caused by buyer misuse

✔ Defects that were not disclosed in the original listing and affect performance

Warranty does not cover: physical damage, power surges, incorrect voltage, buyer modifications, improper setup/installation, accidents, or normal cosmetic wear.

Approved warranty claims may be resolved at seller’s discretion by:

🔧 Repair, or

↩ Replacement of defective parts, or

💳 Purchase credit / store credit (no cash refunds)

Returns / Refunds

❗ No returns, refunds, or exchanges on pre-owned units. All sales are final.

The 1 Year limited warranty replaces all return rights.

Taxes & Government Fees

💰 Buyer is responsible for all applicable taxes and government-imposed charges, including but not limited to:

• State sales tax
• VAT, GST, or international taxes
• Import duties, tariffs, and customs fees

Seller does not collect or refund taxes. Buyer agrees to pay these charges directly if billed.

Accepted Payments

Seller accepts the following:

🏦 Bank Wire Transfer — Preferred and recommended payment method

✅ Personal Check (Shipping once check clears) 

✅ Cashier’s Check / Bank-Certified Check

⚡ Zelle

💳 Credit Card (maximum $1,000.00 USD only)

💰 Venmo

For purchases over $1,000.00 USD, amounts above $1,000 must be paid via Bank Wire, Personal Check, Cashier’s Check, Zelle, or Venmo to complete the balance.

Payment Notes

• Personal and cashier’s checks must fully clear before shipment.
• Wire transfer is preferred for fastest processing.

Shipping & Liability

• Items are packed professionally and insured when applicable.
• Risk of loss transfers to buyer once shipped.
• Seller is not responsible for carrier delays or damage.
• Any shipping damage claims must be filed by buyer through carrier insurance.

Buyer Agreement

By purchasing, buyer confirms agreement to all terms:

✅ Item is pre-owned

✅ No returns or refunds

✅ 60-day warranty replaces return rights

✅ Buyer pays all taxes & customs/government fees

✅ Payment method terms and limits accepted

✅ Shipping liability terms acknowledged

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