Description: This is a new-production input preamp board for the McIntosh MC2100, MC2105, and MC2300 power amplifiers. This board follows the original component layout closely, and no changes were made to the original circuit design. Parts Included:One assembled and tested MC2100/2105/2300 preamp boardAnti-static bag for storing your original input boardTwo 22 kOhm resistors for MC2300's below S/N 4Y426Printed installation guide with redrawn schematic, board layout, and parts listFeatures:Hand assembled in the USA with high quality components: Vishay MRS25 series low noise metal film resistors (1% tolerance, 600 mW, 50 ppm TCR), Nichicon electrolytic capacitors (UPM series for supply filters, UKZ for audio stages), WIMA film capacitors, and new transistors. Robust wiring turrets replace the original hollow posts that wires solder toDouble-sided PCB with 2 oz. copper, plated through-holes, immersion gold finish, and matte black soldermaskSilkscreen reference designators and symbols on both sidesAll boards are burned in for 24 hours and tested to ensure they meet the specifications listed belowWe recommend testing your unit first to ensure it is working properly. If you are repairing your unit, please make sure your symptoms are originating from the preamp board before you replace it. Replacing this board will not resolve problems present in the rest of the unit, such as the power supply or amplifier sections. If you have not replaced the original multi-section can capacitor in your unit's power supply, we recommend doing so; we offer a replacement capacitor kit with a custom designed PCB in another listing (part number 066-095-PAE). Please do not install this board if you are not thoroughly familiar with safely diagnosing, repairing, and testing amplifiers at the component level with test equipment (signal generator, oscilloscope, load, etc.) and a current-limited power supply. Typical performance of both channels (Audio Precision analyzer, 2 Vrms output from DUT):Gain: 20.83 dB @ 1 kHzFrequency response: +0.01 dB, -0.25 dB from 20 Hz to 20 KHzSignal to noise ratio: -97.1 dB below 2 V output (20 Hz - 22 KHz analyzer fltr, unwtd)THD+N: Less than 0.007% from 20 Hz - 20 KHz (no analyzer fltr, unwtd)IMD: Less than 0.005% (DIN 250 Hz/8 KHz 4:1)Note that these specifications apply to the preamp board by itself and do not reflect the overall performance of your McIntosh amplifier. We have tested an original MC2100 input board in the same manner and found that this new board slightly exceeds the performance of the original. We also sell the unpopulated PCB by itself in another listing on our eBay store.
Price: 179.99 USD
Location: Tampa, Florida
End Time: 2024-12-23T17:38:37.000Z
Shipping Cost: 0 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
Brand: ProAudio Electronics
Compatible Model: McIntosh MC2100, MC2105, MC2300
MPN: 128-165-PAE
