Brand New Current Matched Quad (4) Electro-Harmonix 6550 Ceramic Vacuum Tubes
- Ships in 1 business day or less.
- Calculated at Checkout
100% Guaranteed & Tested Tubes
All tubes are tested for Gm, shorts, leaks, gas, and noise on one of our vintage, calibrated, or state of the art digital tube testers. Buy from the experts and avoid hassle!
Power Tubes: Checked for shorts, gas and leaks. Tested for and/or matched by Plate Current (Ip) and General Mutual Transconductance (Gm) at real world voltages on a Maxi-Matcher tube tester.
Shipping & Handling
We have a retail location located in Easthampton MA! You are more than welcome to pickup your order in person. Our typical hours are Monday - Friday 9:00 AM to 5:00 PM but we do offer extended hours so please call first!
We do not combine shipping on new production tubes. We still combine shipping with vintage tubes.
All orders before 1:00 PM EST ship same-day. All orders shipped within 1 business day.
Domestic & International buyers can choose USPS First Class Mail or USPS Priority Mail.
USPS First Class Mail is our default shipping method. Other options available only by request.
Typical transit times:
Domestic USPS First Class Mail: 3-9 Days, includes tracking
Domestic USPS Priority Mail: 1-3 Days, includes tracking
International USPS First Class Mail: Typically 3-6 weeks but up to 3 months! - NO TRACKING
International USPS Priority Mail: 6-14 Days - Includes Tracking
International Shipping Disclaimer
We guarantee all of our shipments, but we do ask that our customers wait 90 days before we grant a full refund due to a lost package. We have shipped thousands of items internationally using First Class Mail and while we have had plenty take several months to arrive but we have had less than 10 actual lost packages.
DEPENDING ON YOUR COUNTRY'S POLICIES, YOU MAY BE RESPONSIBLE FOR IMPORT TAXES WHEN ORDERING OVERSEAS FROM US. WE ARE NOT RESPONSIBLE FOR ANY TAXES, DUTIES, OR CUSTOMS FEES.
Guarantee & Returns
All of our products are guaranteed unless otherwise stated. We do not accept returns on the subjective basis of sonic qualities. All items all guaranteed to be as described and free of any electrical or operational faults such as shorts, low test, microphonics, noise etc. Returns will be accepted for tubes that don't test as described in most cases, but we reserve the right to refuse a return if the tube was not tested properly by the customer. We also reserve the right to refuse a return if it is clear the item was used improperly. For example-a tube installed in the wrong amplifier. We will not accept returns for any cosmetic issues such as crooked bottles, dirty glass, poor boxes etc, unless item condition differs from the description nor will we accept a return for buyers remorse. If you bought the wrong item, you may return it but we will charge a 15% restocking fee.
Vintage & NOS tubes are guaranteed for 30 days from the date of purchase.
New Production tubes are guaranteed for 90 days.
Come visit the only retail tube store in the USA!
VIVA TUBES is your source for vintage vacuum tubes. Located in an appropriately rustic mill building in Easthampton MA. We share our building with a Recording Studio, Brewery, Practice Spaces and many other small businesses. . We carry everything from vintage audio tubes and new productions to HAM tubes. We also have a variety of vintage electronic parts as well as audio equipment and more! We have a vast inventory of thousands and thousands of tubes.
We pride ourselves on our excellent customer service and great attention to testing and product detail. Shop with us and find out why the majority of our customers are repeat customers.
WE ARE ALWAYS BUYING TUBES - LARGE OR SMALL LOTS - WE CAN ACCEPT SHIPMENTS OR MAKE AN APPOINTMENT TO VIEW LOCALLY - PLEASE CONTACT