Reduction Phono Preamplifier Kit


This kit as been replaced by Reduction 1.1. You can learn more about the Integration upgrade for this kit at this link.



SKU: RED Category:

A design by Paul Joppa, the Reduction is a two stage stereo phono preamplifier (one 6DJ8 tube per channel) with passive RIAA equalization.The solid state high voltage supply uses fast recovery soft start rectifiers. The heaters are supplied with filtered DC from Schottky rectifiers, which do not exhibit the switching spikes of lesser rectifiers, the supply is shunt regulated, and the heaters themselves are bypassed with wide bandwidth ceramic capacitors to filter out interference. The passive RIAA components are high quality Vishay Dale 1% metal film resistors and close tolerance metallized polypropylene capacitors. Grid and plate stopper resistors round out the RFI filtering that lets this 6DJ8/6922/7308 based preamp perform without the edginess sometimes associated with this fast, articulate tube. Tube bias is set via Agilent LEDs, a special model that has excellent noise and linearity characteristics for this application.

DISCOUNTS: When you buy 1 > Regular Price: $369.00USD  • When you buy 2 or more > Sale Price: $332.10USD  •  Save: $36.90USD (10%)!

Your pre-order will be charged the day the kit is ordered. We do this to allow cash in advance payment to our vendors to keep the price you pay as low as possible. DIY audio is a very focused esoteric market. We are a small staff with a large passion, attempting to offer the broadest range of kits possible to those interested in this exclusive pursuit of ultra high quality audio reproduction, Thus each kit is manufactured and packed to order, and the production and packaging schedule is influenced by demand. Please understand that our shipment can take up to 3 to 6 weeks when demand is high. You may check how shipping is progressing for a kit by looking here.

Additional information

Weight 8 lbs
Dimensions 12 x 10 x 6 in
Upgrade Options

Basic Reduction, Add the Integration Upgrade


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We have moved! Check the contact page. Now taking pre orders for the newly updated Reduction 1.1 phono preamp with universal power transformer. Dismiss