QUAD II amplifiers are one of the most popular items bought on eBay. Here are a few pointers that might be useful. Buyers tend to favour amplifiers with very close serial numbers but this is not really...
A common misconception is that the rated power of loudspeakers is a measurement of how loud they are and an amplifier has to have the same power output as the rated power of the loudspeakers it is used with....
Aerial amplifiers can be very useful if your signal reception is not quite up to scratch. They are used to improve the performance of your T.V. or radio equipment. If your T.V. picture is 'grainy' or in the...
A question I hear a lot. Do I need to have my Valve amplifier biased? So What is Bias. Well to put it simply the bias of a Valve amp is set by adjusting the grid voltages to set the idle current of the...
Chinese valve or tube amplifiers - are they any good? Well, I've tried out 2 of them from Hong Kong and the answer in a nutshell is they are absolutely brilliant and easily beat much more expensive transisitor...
Matching Amplifers To Speakers When you're matching a Power Amp to a PA Speaker, a good rule of thumb is to pick an amplifier that can deliver power equal to twice the speaker's continuous IEC power rating....
Ideally you should pick an amplifier that can deliver power equal to twice the speaker's continuous IEC power rating. This means that a speaker with a "nominal impedance" of 8 ohms and a continuous IEC power...
Quad 33/303 Amplifier General These amplifiers were made from 1967 and had a production run of about 15 years. They were one of the best amplifiers around at that time for both design and technical...
Voc Rock Guitars Audio Reviews on ECC83 12AX7 Pre amp tubes. Essentially there are only 3 major tube manufacturers remaining in the world today. We decided to put the 3 most popular tubes manufactured by...
If you are thinking about purchasing a vintage Akai tape recorder I though a few tips on things to look out for /common faults might be useful. Akai recorders were the very top end of the domestic market in...