????PRODUCTS???? Please check the Photo Technics SU-3400 Stereo Integrated Amplifier (1973) – Fully Restored with New CapacitorsDescription This is a Technics SU-3400 Stereo Integrated Amplifier, a classic model from 1973, that has been meticulously restored and upgraded. All electrolytic capacitors have been replaced with high-quality, Japanese-made components, ensuring optimal performance. Exterior Condition:Excellent for its age, with no visible rust or major scratches.The front panel has minor blemishes, but overall, it is very well-preserved.The original top panel shows slight signs of use but retains its factory finish. Internal Condition:All circuit boards have been inspected, and solder points repaired.All electrolytic capacitors have been replaced with new, high-quality Japanese components.Block capacitors have been upgraded to audio-grade ELNA capacitors (8700?F, replacing the original 3300?F) for enhanced sound performance.Key Features & Restoration Details Speaker Terminals:The original speaker terminals are made of solid brass—a rare feature for amplifiers of this era. Protection Circuits:While the unit does not have a traditional speaker protection relay, it is equipped with an inrush current prevention circuit, located beneath the block capacitors.This prevents pop noise during power-on and ensures smooth operation. Improved Power Supply:The block capacitors were upgraded from 3300?F to 8700?F, significantly increasing power supply capacity.This upgrade eliminates distortion at higher volume levels and improves overall sound stability. Volume Control & Usage Notes:Due to the increased power supply capacity, the amplifier can now handle higher volume settings without distortion.However, users are advised to start from zero volume and keep the volume knob at or below the 12 oclock position to avoid stressing the circuits, as the original design was not intended for excessive output. Transistors & Heat Dissipation:The original metal-can transistors were inspected and found to be in excellent condition, so no replacements were necessary.All heat sinks were cleaned, and new thermal grease was applied to improve heat dissipation. Contact Cleaning:The bass volume control, which had significant static noise, was thoroughly cleaned and restored.Other controls and switches were cleaned using contact cleaner. Hand-Soldered Design:This amplifier features hand-soldered wiring, which ensures excellent build quality but made restoration more labor-intensive. For example, cleaning the bass volume control required disconnecting 20–30 wires.Important Notes for UseStart with the volume knob at zero when powering on.Avoid operating the amplifier at excessively high volume levels (above the 12 oclock position) to preserve its longevity.The amplifier produces a natural fade-out effect upon power-off, which is typical for models without a speaker relay.Why Choose This Amplifier? This SU-3400 represents a perfect balance of vintage charm and modern reliability. The restoration process emphasized preserving the original sound signature while upgrading critical components for enhanced performance and longevity. It is ideal for audiophiles and collectors who appreciate the craftsmanship and sound quality of classic Technics amplifiers. For detailed condition, please refer to the photos. ????PAYMENTS???? We accept PayPal and all major Debit / Credit Cards. We can only ship your item after your payment clears. We ship within 10 days of payment. ????CHECKOUT???? Please check your address before paying because we can ONLY ship to addresses that are entered before placing the order. We cannot change an address after the order has already been placed. ????SHIPPING???? Packages:Box and Bubblerup Packages usually leave our warehouse within 10 days of payment. Weekend orders will ship on Monday or Tuesday. We provide valid Tracking Numbers for all orders. ????International Packages:???? We ship to all US Territories, Europe and Asia and Middle East and Australia and Canada including Guam and Hawaii. All our international packages ship under the Fedex and Japan Post. ????CUSTOMER SERVICE???? If you have any questions or issues, we are at your service. You can email us anytime through eBay messages. ????RETURN INFORMATION???? We offer a standard FREE 30 days refund or exchange policy. Item must be returned in original condition in order to receive a full refund. ????Customs duty???? Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. We will reply to your question or invoice within 3 days. We cant not reply gifts or unreasonable requests such as declared amount.

Item descriptionVintage Technics ST-3400 FM/AM Stereo Tuner Good working orderIn used condition with wear as picturedshort power cable Shipping Terms1.1 Free delivery for anywhere in the United Kingdom. 1.2 Our aim is to prepare and dispatch next working day. Items ordered on Friday after 1pm and on Saturday and Sunday will be processed and dispatched on Monday.1.3 Orders dispatched are tracked and signed.1.4 We will use all reasonable endeavours to ensure these times are met, but cannot be held responsible for dispatched parcels delayed by third parties, for example due to poor weather conditions.1.5 If you do not receive your order within 7 working days from the date of dispatch, please contact us through the eBay messaging service. Return Terms1.1 We will accept a change of mind return provided it is within the first 14 days starting from the day of purchase. The customer is eligible for a full refund during this period. You are responsible to return the item with the original packaging and the same condition as you have received the item. Damage during transit or before you return the item will negate the return period. You will not be eligible for a refund/exchange after the first 14 days of purchase. 1.2 Please ensure that a copy of your invoice is returned back to us with your item. Copyrights (c) 2023 by Thingmebobs. All rights reserved.

Technics SU-3400 Integrated Amplifier - Rare 1973 Vintage Model Welcome to Tokyo Thrift Nook! Your destination for premium vintage audio gear from Japan! Discover more unique finds at Tokyo Thrift Nook! ???? Product Description Presenting the Technics SU-3400, a rare and highly sought-after integrated amplifier from 1973. This vintage model offers warm, authentic sound quality that is characteristic of Technics early audio engineering. With its classic design and durable build, the SU-3400 is a treasure for audiophiles and collectors alike. The unit has been tested for power and is in working condition. Given its age, this amplifier is a true vintage piece, adding both audio quality and a touch of history to any setup. ???? Key Features Model: Technics SU-3400 Type: Integrated Amplifier (Pre-Main Amp) Year of Manufacture: 1973 Condition: Tested for power; vintage condition with signs of age Sound Quality: Warm, classic Technics sound Design: Vintage aesthetic that adds a touch of history ???? Shipping Information We provide secure international shipping options to ensure safe delivery: Expedited Shipping: Shipped via FedEx or DHL for fast delivery. Standard Shipping: Japan Post EMS with delivery within approximately one week. Economy Shipping: Japan Post AirMail without tracking, arriving within 10-30 days. ???? Important Information Import duties, taxes, and charges are not included in the item price. These charges are the buyers responsibility, so please verify any additional costs with your local customs office. Ensure your shipping address is correct to avoid fees from address adjustments. If you encounter any issues upon receiving your item, please reach out to us—we’re here to assist! About Tokyo Thrift Nook Tokyo Thrift Nook specializes in offering a curated selection of high-quality vintage Japanese audio equipment to enthusiasts worldwide. Shop with confidence and explore our range of unique finds! Visit our store for more items! N:61

National Panasonic Stereo Integrated Amplifier SU-3400 Verstärker In diesem Top Zustand nur sehr selten zu finden funktionsfähig, optisch sehr guter Zustand, ohne nennenswerte Gebrauchsspuren SpecificationsPower output: 35 watts per channel into 8? (stereo)Frequency response: 5Hz to 100kHzTotal harmonic distortion: 0.2%Damping factor: 50Input sensitivity: 2mV (MM), 100mV (line)Signal to noise ratio: 73dB (MM), 85dB (line)Output: 100mV (line), 100mV (DIN), 1V (Pre out)Speaker load impedance: 4? to 16?Dimensions: 410 x 140 x 300mmWeight: 10.2kgYear: ca. 1971-1974

National Panasonic (Technics) Stereo Integrated Amplifier SU-3400 AmplifierThe description of this item has been automatically translated. If you have any questions, please feel free to contact us.National Panasonic Stereo Integrated Amplifier SU-3400 amplifierVery rarely found in this top conditionfunctional, visually very good condition, without any significant signs of wearSpecificationsPower output: 35 watts per channel into 8? (stereo)Frequency response: 5Hz to 100kHzTotal harmonic distortion: 0.2%Damping factor: 50Input sensitivity: 2mV (MM), 100mV (line)Signal to noise ratio: 73dB (MM), 85dB (line)Output: 100mV (line), 100mV ( din ), 1V (Pre out)Speaker load impedance: 4? to 16?Dimensions: 410 x 140 x 300mmWeight: 10.2kgYear: approx. 1971-1974National Panasonic Stereo Integrated Amplifier SU-3400 amplifier Very rarely found in this top condition functional, visually very good condition, without any significant signs of wear Specifications Power output: 35 watts per channel into 8? (stereo) Frequency response: 5Hz to 100kHz Total harmonic distortion: 0.2% Damping factor: 50 Input sensitivity: 2mV (MM), 100mV (line) Signal to noise ratio: 73dB (MM), 85dB (line) Output: 100mV (line), 100mV ( din ), 1V (Pre out) Speaker load impedance: 4? to 16? Dimensions: 410 x 140 x 300mm Weight: 10.2kg Year: approx. 1971-1974 Marke National Panasonic EAN Nicht zutreffend Produktart HiFi Verstärker Modell SU-3400