Audio Research REF 250 Mono Valve Amplifier

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This item cannot be ordered online. If you are interested please click on the Ask a Question button below.

The REF250 features new enhancements outside as well as major performance advances inside.

This item cannot be ordered online. If you are interested please click on the Ask a Question button below.

First, you will notice a more modern, monochromatic appearance, including a new front panel with a small aluminum power button: natural units include silver handles and top cover, while black units come with black panel, handles and top cover. A new analog meter replaces the vacuum-fluorescent digital display of its predecessor; this illuminated meter is capable of displaying power output, line voltage and output tube bias settings. Adjustment pots for tube bias are located just underneath the meter. Meter illumination has three levels including “off.”With the new metering design, a remote control is unnecessary. Near the front of the circuit board inside the REF250 there is a small LCD display showing accumulated tube hours, visible with the top cover in place.

The fan on the rear of each chassis now features low-turbulence intake grids and has two selectable speeds for ultra quiet and effective cooling. The detachable power cord remains the 20-amp IEC type used on the REF210. There are two 12V triggers on the back panel, along with 4-, 8- and 16-ohm output taps. Those who have experienced first-hand the dramatic performance advances of the new REF150 stereo amplifier vs. the previous REF110 will find a similar range of improvements in the REF250 – perhaps even more dramatic. A new power transformer and 50% more bulk energy storage, along with KT120 output tubes, give the REF250 tremendous impact, bass speed, control, and definition.


And, new Teflon-technology capacitors also improve resolution and focus on every type of musical program.Explosive micro and and macro dynamics, a very low noise floor, and vice-like control over every type of loudspeaker will be recognized as the benchmark of this remarkable power amplifier. The measure of what constitutes state of-the-art performance is being redefined by Audio Research, once again. We feel that this is the finest amplifier we have ever produced.

We endeavour to despatch same day for orders placed up to 2pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is recieved. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK ORDERS:  We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail recorded delivery or special delivery. Larger items are delivered using a courier service such as Interlink Express, DPD, UPS or DHL. 

INTERNATIONAL ORDERS: We offer competitive rates which can be confirmed by email. Please just ask – we will need a full delivery address and telephone number. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using DPD, DHL or UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Turntableworld or by the courier with a request for any further information required. Customs duties do not apply for shipments into any EU country (for a full list please refer to the EU Country List). Customs duties can apply for countries outside of the EU. Customers in these countries are responsible for all taxes and duties incurred when the items enter their country.

COLLECT IN STORE OR HOME INSTALL:At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock. 

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