My power amplifier has just stopped working. It's a Rose English made 70W stereo amplifier, about 20 years old. Here it is with the top off: http://flic.kr/p/mbRV1M When I switched it on there was a noticeable 'phutt', but no noise at the speakers. Now nothing - no mechanical or electrical noise, and the power LED doesn't come on. Also, when I disconnected the speaker cables, one had...

People may be interested in this: http://www.bbc.co.uk/blogs/radio3/posts/Radio-3-in-40#dna-comments I don't know if this will work with Chrome on Linux, though. At present I use FireFox on fairly old distros and feed the output out via USB. Fear I'd have to change a lot of that for it to work! Anyone using a system that might work who can comment? FWIW I'm asking a couple of people at the...

Hello all, I moved house the other day and somehow or other managed to loose/misplace the power supply for my Pink Triangle PT1. I'm totally ignorant on all things like this so what sort of power supply do I want? They were designed to be run at 9V DC but my old supply was 12V. It had a 3.5mm Jack plug. That's all I know.

On the odd occasion when I've been forced to feed an electronically balanced output into an unbalanced input, I've normally done this by going across Pin 1 (ground), and Pin 2 (+) But I've just come across an electronically balanced device that seems to also short 1&3. Thought that was bad practice or is it ok these days? Other odd thing is the spec of this balanced output - it says...

Being rather out of touch with the latest gizmos, any recommendations for a decent sounding graphic equaliser that won't break the bank? 1/3rd octave type would be ideal. -- *Speak softly and carry a cellular phone * Dave Plowman London SW To e-mail, change noise into sound.

I have a bit of a block when it comes to mains transformer wirings. ;-) Device is factory set to 120v AC 60Hz, it says on the gubbins. It has an analogue PS with a mains transformer. It has two primary windings wired in parallel. Red and black go to neutral on the IEC connector, brown and orange to the on/off switch output. Obviously, they go to series for 240v - I assume the transformer...

Just to report some progress with this. I'm testing a Behringer UMC202 and a Focusrite 2i2 ( both stereo ADC and DAC, up to 96k/24). They both work OK with Linux and RISC OS. Been making test recordings using them. Quite impressed with the 2i2 in particular. Fingers crossed I may also have a chance to try something else as well. But the combination of the 2i2 and a Linux laptop look like a neat...

I'm experimenting with a Behringer UCA202 ADC+DAC but I'm also interested in some of their better models like the UMC202 which can provide 96k/24. (Plus also perhaps alternative makes.) Anyone had any experience of these for playing or recording via USB? And any particular suggestions for a *UK* dealer I might buy from who will deal via email/letter/etc rather than being an anonymous website...

I have an old 'sagging' Xerxes and what looks to be a non-manufacturer MDF plinth - in the sense that Roksan don't seem to sell them and it has no markings, so I'm assuming it's a 3rd party affair. Has anyone tried to replace these plinths, and can offer advice? The Roksan forum seems to concentrate on weird fettling and Roksan's own mods. -- Cheers, Rob

My amplifier has two outputs. One is switched, and used for the speakers in the living room. The other is taken via a separate switch box to speakers in the dining room and kitchen. Originally, the relative sound levels in all three rooms were reasonably matched. However, during a kitchen refit, I had to get rid of the conventional speakers, and fitted a pair of small KEF in-ceiling units....

Another thread mentioned the importance of treble frequencies in forming a soundstage. I'm losing some HF hearing, about average for my age. Long before I became aware of this I had noticed a lack of spatial definition in the systems I use and posted a query here a while back. Now I know I have a fairly steep HF cut off starting around 8.5 kHz. System A uses Behringer B2031A monitors fed...

is it likely that Logitech will upgrade to allow the processing of 192Khz? if not, do you know of a workaround housetrained --- This email is free from viruses and malware because avast! Antivirus protection is active.

Why are they so crappy? http://www.polkaudio.com/forums/attachment.php?attachmentid=22598&d=1171259648 Anyone know how long replacements last? Is there an improved design that actually works? Or does everyone fix theirs with metal pins and epoxy? -- Eiron.

As most will know, speakers like the Spendor BC1 sound horrid if placed on the floor. Raising them on a stand with air between the floor and the speaker sorts out the bass end nicely. In practice, the stand height places the tweeter roughly on line to the ear when sitting down. But is there a formula for the ideal distance from floor to speaker based on cabinet volume or whatever? Or is it...

I have Ive== one of these in working order, and use it as being blind its far easier to get the pick up on the actual record! However in recent years its sticking both at the start, ie motor does not push it quit far enough to go off and at the end, ie does not always pick the pick up of. On having a feel I notice the original grease on the tracking system is going slightly sticky. What I...

I just found the above-mentioned amp in my store room. It actually looks like quite a nice old thing. A new (Alps) volume pot and it runs a treat. Fairly primitive output devices (MJ802/MJ4502), but, given the age, it's a reasonable choice. Does anyone have any information on this amp? -- Trevor Wilson www.rageaudio.com.au

I'd be interest in recommendations/comments on suitable USB audio devices for two purposes. 1) High resolution stereo audio sampling ADC. Ideally up to 192k/24bit. 2) Microscope. Mainly for things like examining a LP replay stylus. I want these to work without problems (or an install struggle) with Linux distros. But in the case of the stereo audio ADC I have an additional aim.

Found one of these scrapped at the tip the other day but otherwise in nearly new condition. It works OK - yes the selector switches are a bit noisy but Electrolube will fix that - but there is a low level buzz present even with the volume fully down and which rises in level with the volume, most noticable on the phono input. The cct diag shows the low level circuits to be run off their own...

I was amused to hear on today's BBC R4 'Moneybox' programme about someone who bought, on ebay, a pair of Quads, neither of which worked. He wanted advice on getting his money back. I wonder if he remembered to plug them in and switch them on! -- Eiron.

Bit of a play on words. I used relays between the analogue crossover and the power amps on my modified LS5/8 to prevent that annoying squeak at power up. They simply short the amp inputs for a second after power op. They do prevent the 'squeak', but replace it with a gentle plop. Any easy way to make this totally silent? -- *You know you're a redneck if your home has wheels and your car...