Adastra | Compact Beltpack Induction Loop Receiver,Black,12cm

Funciona bien, lo usamos para probar el bucle inductivo de un teatro y todo ok!

I was going to make one of these but at the price they are I decided to buy. It works well. Very loud and good quality when used with good headphones or ear moulds. It uses a pp3 for a battery and lasts a long time. The volume control works the right way , clockwise to make it louder. The headphone switches it on when you plug it in. The filter should be switched on all the time. Normal hearing aids have the filter on permanently. I don’t know why the filter switch was not used to switch the unit on and off and hard wired the filter on. My wife likes it very much and has to keep the volume about a third up, otherwise it is too loud !

am unable to test properly to date, works ok with radio but computer not so good with a lot of unwelcome noise, still to try person to person

Worked fine. The sound from our induction loop came over chrystal clear on this receiver. However, I had to you another earpiece with ear buds as the one that comes with the unit kept falling out of my ear.

I bought this for recording live events in environments in which there is a lot of room reverb and I don't have access to a direct feed from a mixer, so quality matters more than it might as just a test tool. It is susceptible to noise when there's weak or no signal (including during quiet or silent periods) but, given the nature of the technology, that's to be expected. Still, it's not all that bad if the signal is strong (as tested using an earbud as a transmitter held near the pickup inductor). I haven't yet had a chance to test it with a purpose-built AFIL transmitter and have no idea what signal strengths are like in real situations. Perhaps I'm being a bit hard on it given its price point, and the £450 professional receivers might not be much better. My biggest issue with this unit is that it is extremely "microphonic" (physical vibrations get converted to sound) because it uses a really cheap inductor as its pickup. It has no microphone, it shouldn't do that! If you have some basic electronics experience and access to the right equipment, it's not hard to replace with something better quality if you care. Or, just make sure it doesn't get jostled. Just be aware that some of the noise you're hearing could be coming from your belt, clothes or fingers if carrying it in your hand. Unlike other reviewers' units, mine does not switch off when the 'phones are unplugged. Seems I have to disconnect the battery. It's a nuisance, but it's not like this is an every-day tool. As others have noted, the ear buds are poor quality. The 3.5mm moulding on mine was faulty and one of the buds intermittent, but any other headphones or earbuds will do instead.