{"id":258949,"date":"2026-08-26T18:20:10","date_gmt":"2026-08-26T16:20:10","guid":{"rendered":"https:\/\/captain-guitar-lounge.com\/produkt\/2005-thd-bivalve-30-2x-kt66-id-6089\/"},"modified":"2026-08-24T18:20:10","modified_gmt":"2026-08-24T16:20:10","slug":"2005-thd-bivalve-30-2x-kt66-id-6089","status":"publish","type":"product","link":"https:\/\/captain-guitar-lounge.com\/en\/product\/2005-thd-bivalve-30-2x-kt66-id-6089\/","title":{"rendered":"2005 THD – BiValve 30 – 2x KT66 – ID 6089"},"content":{"rendered":"

The THD BiValve-30<\/strong><\/em><\/a> is the UniValve\u2019s big brother and an exceptionally flexible single-ended Class A tube amplifier<\/strong>.
\nWhat makes it unique: The two power tubes can be replaced independently with numerous types of octal tubes (8-pin base)\u2014 without having to readjust the bias<\/strong> and even without the tubes needing to be matched.
\nThis allows you to experiment with a wide variety of sound characteristics using combinations of 6L6, EL34, 6550, 6CA7, 6V6, 6K6, KT90, KT88, KT77, and KT66<\/strong>. The amp is currently equipped with 2x KT66<\/strong> tubes.
\nA truly fascinating piece of THD technology for tube enthusiasts and those who love to experiment.
\nThis item is in good condition<\/strong> and comes with a dust cover and an inspection report<\/strong>. The handle was installed separately.<\/p>\n

\u2705 Year of construction: 2005
\n\u2705 Model: THD BiValve-30
\nPower: 30 watts
\n\u2705 Power amplifier: Single-ended Class A, 2x KT66
\n\u2705 Tubes: various octal types without bias adjustment
\n\u2705 Compatible with: 6L6, EL34, 6550, 6CA7, 6V6, 6K6, KT90, KT88, KT77, KT66
\n\u2705 Serial number: 0603
\n\u2705 Manufactured in the U.S.
\n\u2705 Weight: 15.5 kg
\n\u2705 Condition: Good
\n\u2705 Case: Dust-proof cover
\n\u2705 Documents: Inspection Report<\/p>\n","protected":false},"excerpt":{"rendered":"

Made in the U.S.<\/strong>
\nCondition: Good
\nSerial No.: 0603
\nWeight: 15.5 kg
\nShipping class: Standard<\/strong><\/a>
\nCase\/Case: Cover
\nFoot switch: no
\nDocuments: Protocol of the inspection
\nOriginal packaging: no
\nBrokerage sale: 17667<\/p>\n","protected":false},"featured_media":258392,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[1977],"product_tag":[],"class_list":{"0":"post-258949","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-head-en","7":"product_shipping_class-standard","8":"pa_baujahr-2000s-en","9":"pa_power-up-to-50watt","10":"pa_power-tubes-kt66-en","12":"first","13":"instock","14":"sold-individually","15":"purchasable","16":"product-type-simple"},"composite_virtual":false,"composite_layout":"","composite_add_to_cart_form_location":"","composite_editable_in_cart":false,"composite_sold_individually_context":"","composite_shop_price_calc":"","composite_components":[],"composite_scenarios":[],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","yoast_head":"\n2005 THD - 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