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Welcome to Lyric Hifi

429 Lisburn Road, Belfast BT9 7EY Tel: +44 (0)2890 381296, From ROI 04890 381296
Open: 10:00am - 5:00pm - Monday to Friday, Saturday by appointment only

Call in for a mosey round, tap us for good advice, and have a listen to great sounds

How to choose the best online casino?

This page hosts a list of online gambling sites and casinos that are not part of Gamstop. These external operators hold licences with places like Malta, Cyprus, Curacao, Gibraltar or other off-shore entities outside of the UK. Casinos that are not based in the UK should be approached with caution. These sites do not have the same level of safety as those licensed by the UKGC, as they are classified as non-Gamstop casinos. These gambling sites accept players from all over the world, including the UK, but they are not specifically targeted at British gamblers. They usually use euros as their currency rather than pounds sterling. The sole purpose of this web page is to provide feeless and straightforward self-exclusion from any gambling websites not included in Gamstop s scheme. The top list is for foreign residents living in the UK who want to play at a casino that isn t licensed by the UKGC. If you want to stop using these websites, we recommend that you manually block yourself from each casino not on the Gamstop list or explore our other self-exclusion options. For a general casino player, playing an online slot machine or live casino game for a few free spins is a great way to de-stress after work. For some people, gambling is not a casual activity--it s an addiction. Fortunately, the Gamstop scheme exists to help problem gamblers in Great Britain by allowing them to self-exclude from online casinos. If you or someone you know suffers from gambling addiction, encourage them to seek help through this program. If you re looking to gamble online, it s a smart move to sign up for Gamstop. Once you re registered, Gamstop will exclude you from all participating online gambling and casino sites. Right now, it s voluntary for casinos to register with Gamstop, so there are some that aren t included. Gamstop is a UK-based initiative, and currently, online casinos licenced in Malta, Cyprus, Curacao are not registered on Gamstop. The UKGC can’t force an individual to join the Gamstop scheme.

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There is much confusion about active and passive so I thought I should give the correct explanations to help you sort it out.

Many companies describe powered speakers as active. This may be true in their sense but not in the true hifi sense.

The description active-passive really refers to the loudspeaker crossover network. This is the part inside the speaker box that splits the signal into bass, treble, midrange etc to go to the different drive units.

The passive crossover has no power of it’s own, it takes it’s power to work from the music signal. It is made of capacitors and inductors to separate the frequencies. In a simple two way system a capacitor might feed all the frequencies above 1kHZ through to the treble unit while an inductor will throw out everything above this away and feed the rest to the bass unit.

These components are large and somewhat crude to have the necessary power handling, up to around 30 volts. There are many types of passive crossovers, 1st, 2nd, 4th order, with various technical issues for and against, but in almost every case they sap your amplifier power and are fairly inaccurate.

Passive Crossover Loudspeaker

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Active Crossover Layout

The active crossover layout places the crossover before the power amplifier in the layout. The crossover is then dealing with voltages less than 1 volt and you can have a very accurate frequency split, in some cases tailored exactly to the characteristics of the loudspeaker drive unit.

The power amplifiers are then coupled directly to each drive unit without losing any power and giving increased dynamics.

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This diagram shows a 2 way loudspeaker system, so you need 2 power amplifiers, a 3way will need 3 power amplifiers, etc

The amplifier then has to able to split into a pre-amplifier ( vol control & switching) and the power amplifier ( muscle)

The layout then becomes:

Sources-Preamplifier-Active Crossover-Power amplifiers-Speakers

The benefits of this layout are obvious, so what are the drawbacks?

Cost is the obvious first one. Given that other considerations such as better amplifiers, source s, etc could improve your system more, this tends to be an end step and therefore at the more expensive end with higher level power amplifiers. One really good power amplifier will sound better than two poorer ones!

Second is the expertise at the manufacturer. To do active properly a company has to be controlling both loudspeakers and amplifiers at a high performance level. There are very few manufacturers that are successful in both markets.

Currently I think that only Linn and Naim promote active technology in the domestic hifi market, although it is common in pa/concert rigs. It will be interesting to watch developments as to whether the Focal/Naim merger leads to more or less active systems?

This very specialised expertise means that in practice few people will ever own an active system, even thought the rewards are great.

It’s just a shame that the pockets have to be as deep!

 

I have been encouraged by the response to my first two articles, ranging from strong support and interest to didn’t understand past the second line!

Do drop me a line with any queries or suggestions as to what issues you would like explained

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Michael