A speaker secret possibly used on Amazon Alexa too

At your risk. A very helpful tip on building or making loudspeakers is that the box be much larger than the drive unit, or vice versa that the drive unit be much smallermuch than the box. This can give excellent no boomy and deep bass if the drive unit has a low reasonant frequency. For a closed box this reasonant frequency needs to be much lower than needed since when when the drive unit is mounted in the box the frequency will be raised by acoustic suspension. Anyway a 4.5in Fostex FE127E gives amazing bass on a bigger Pioneer box (see previous posts). And this Christmass present from my brother and his wife to our parents is an Alaxa, Amazon. Inside it is a tiny speaker. But the bass is surprisingly deep for Alexa's size. Do they also EQ?

Listening tests on a 1m by 1m 2 ply linoleum baffle.

At your risk. Baffle speaker is hung from ceiling from 2 poits using Picture Hanging Systems. A Grundig paper oval 5in by 10in, 5 ohms speaker is assymetrically mounted. It looks rather ugly. 2 ply linoleum glued by PVA is still soft, compliant. But this is peshaps why it absorbs vibration well. Sound is very clear, real and lively. It has this truthful quality of Hf heard near a record player stulys, although listening tests are done with CD. Speaker gives excess of mid and treble. So an inductor of say 0.7H is connected in series. A resistor (starting as a variable resistor) in parallel to inductor may be needed. Bass is nice. It could have been better as there seems to be a mid bass reasonance, (due to drive unit?). Would bass be more deep if more ply linoleum was used, but it would be very heavy. Perhaps using a say 50cm by 50cm would be more appropreate as on the Zeis Ikon baffle cabiet speaker. Barbara Streisand sounded very nice with speaker driven by the Pleiades single transistor 2N3053 power amplifier. Test is mono, actually only one cD channel is used. Since around New Year it had been desided to have only the Great Celestion Ditton 150 speakers in the small Pleiades control room. All other speaker tests are done on the much greater size living room. Still the Rola Celestion Ditton 150 speakers (in stereo) driven by 2 Pleiades 2N3053 power amplifiers in pure class A are prefared and this is the refference Pleiades reproducing setup. Aknowledgment to Mr. Yiannis for those beautiful souding speakers with so deep bass, fluid mid and extended balanced high frequency content. The amplifiers have small output transformers (see previous posts, after all power of amps is much less than 1 Watt. With the big Sowtewr SK05s output transformers although they are exxcellent and more efficient, bass on this particular setup may be much.

Brushing teeth with sea water

At your risk. This is not a medical advice. Just personal experience. Using now for a few years very good quality toothbrush Curaprox and Jordan. Firstly Curaprox is used, then Jordan which seems to be more helpful for inbetween teeth gaps. Using no toothpaste. Brushing after everymeal. Teeth are in quite good condition. When sea water was replaced by tap or filtered water, it was a disaster. Sea water seems to kill harmful microrganisms. This is possiblyt done by salt dyhydrating microbe cell membranes by ormosis. After brushing teeth, both toothbruses are rinsed in plenty of sea water. At your risk.

Happy New Year

Ευτυχισμενο Νεο Ετος