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OFF - FOR SALE: Mapletree Audio Ultra 4A Preamplifier

Item #649450982
Info: Mapletree Audio Ultra 4A Preamplifier

Asking Price:
CAD $690.00
Payment method: Cash, Money Order
Shipping weight: 1.00 (kg) Calculate Shipping
Condition: 8 - Very good (?)
Date Posted: Jul 21, 18 7:26pm (PST)
Edited: Aug 04, 18 1:12pm
About Seller: TannoyGode
Maple Ridge, BC
Canada
[other classified ads]
Product Brand: Mapletree Audio Design
Product Model: Ultra 4A
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Description

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** This Ad is Marked as OFF by seller and cannot be responded to. **

Mapletree Ultra 4A preamplifier.

I'm the second owner. I have owned it for a year or so.It sounds great, but is susceptible to emr from my well pump, so am going passive.

I have replaced the power supply smoothing capacity with a lower value 50 microfarad cap following Lloyd Peppard's recommendation.I have the original 100 microfarad. I have also bypassed the the balance control and have reworked the volume control in shunt mode using Vishay Z-foils.This can be easily reversed if desired, although I highly recommend this modification.

The preamplifier comes with the standard tubes as supplied, although upgraded tubes are available - see my other ads.

Please let me know if you have any questions.



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