Jolida Tube Amp  Signature & Platinum Series Upgrades JD302A/B-RC, JD502A/B-RC Brought to you by the company that started the ball rolling with Jolida modifications!! Nobody knows Jolida products like Response Audio Want your Jolida JD801 Modified? We got you covered. DETAILS Anybody can change tubes and add a few things here and there. What you get with the Signature/Platinum Modification is basically a complete rebuild using only the best internal components based on critical evaluation and testing. Plus, no matter how old your unit is, we offer a full 5 year warranty on our work. Why spend your hard earned money on a new amp that could set you back thousands of $$$$. Transform your Jolida 302, 502 or 801 "A" or "B" Series amplifier into something that will compete with many of today's high dollar pieces for a fraction of their cost. You will think you just purchased a brand new amp and still have money left over for further system upgrades. When your unit arrives at our facility, it is first tested to assure it is functioning properly before we continue on to remove ALL internal components. When we are finished with our upgrade, the only remaining original parts on your amplifier is the transformers. The reviews and customer feedback says it all. Check out our Feedback Pages as well as the review of our Bella EXtreme 3205 amplifier at EnjoyTheMusic.com. If you have your 302/502 upgraded with the Signature Modifications, you will end up with the same unit as reviewed. The Platinum upgrade brings you to the same level as out Bella EXtreme 3205 Platinum that was debuted at RMAF07. Check out the show reports HERE We now incorporate some new modifications to the power supply on the 302, 502, and 801. What this means for the end product is much better dynamics, headroom and control in the lower frequencies providing a fuller presentation. SonicCap Gen II capacitors used in the coupling positions on Signature units. SoniCap Platinum Teflon capacitors used for "Platinum" modifications.. SonicCap capacitors used at signal ground locations Power Supply filter capacitors upgraded to higher capacitance / lower ESR Panasonic units  High voltage bypass capacitors used in power supply bypass Dale/Vishay 1 watt 1%, non-magnetic metal film resistors used throughout the signal path. We have chosen 1 watt units over original .5 watt for a quieter operation.  Carbon Comp resistors used at grid stop location on Signature units. Mills non-inductive resistors used in Platinum modifications. Dale/Vishay 5 watt, 1% non-magnetic resistors used for cathode ground. Dale/Vishay 3 watt 1%, non-magnetic resistors used in bias stage for lower noise and also allowing for biasing range to accommodate EL34, 6550, KT88 output tubes ON NON RC UNITS ONLY Fairchild "Ultra Fast - Soft Recovery" diodes are utilized in the power supply rectifying stage for lower noise floor and quieter background. Alps Blue / Noble stereo / Carbon volume control or dual mono Carbon based volume controls utilized on older units. Internal wiring upgraded to either 22 awg. high quality copper or 22 awg high quality silver plated copper. On older "A" Series amplifiers RCA input jacks upgraded to higher quality silver plated units on older "A" series amplifiers. Balance control bypassed. High quality RoHS silver solder used throughout. Biased and bench tested for 2 hours Minimum 12 hour system tested Labor 5 hours Warranty: Limited 5 year parts & labor on replacement parts only. Click here to read our warranty PRICING: Newer models with silver face plates Signature: $650 + return shipping Platinum:  $750 + return shipping           PRICING: Older models ("A" series and older "B" series with gold faceplates) Signature: $675 + return shipping Platinum:  $775 + return shipping PRICING: $599 if unit is built as straight power amp. All models. Click HERE for recommended upgrade tubes