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There was a time in the early seventies that I would have been perfectly happy with just four strings of the Fender maple neck precision bass variety, but then came the drugs which caused me to become more adventurous. So I got John Birch guitars of Birmingham to build me a Rickenbircher which...

Yup!, I find it’s better to let the pops through the compressor threshold attack time, just to distort the pre amp exactly the right amount to generate high frequency content spikes by squaring the waveform tops. But as not all compressors are created equal in that regard, that might not be...

Point taken I am retired and don't know what the temperatures of the adhesives are today for all the palarva they talk I thought these modern high power driver's would have glue and voice coil formers that would continue to provide support and insulation to a much higher temperature today?.:-)X

So I just sold my old Acoustic 408 for proper money to a nice bloke in Italy, so minimalist rulz don't apply everywhere.:-)X PS I don't think rock and roll deserves downsizing personally.

As a retired loudspeaker designer, the whole idea of massively increasing X-Max for low frequency power handling comes with lots of caveats. First your lovely tight magnet gap has to go from positively virginal, to about six kids later, Just to avoid the voice coil rubbing the magnet gap, never...

As distortion increases so does average power, it's a bit like compression, in effect the driver gets hotter quicker. This has the result of reducing the manufacturer handling power which would have been tested with a pure sine wave at 1khz. Displacement limited power is the factor that is most...

So we have discovered the thermal rating of a single 15" we used to need two of those for safe band levels. I have always said that until physics has managed to change the melting point of pure copper significantly higher than 1048 deg c. This is still inevitably the result of lighter and...

To take advantage of a JBL or other type of quality midrange horn, the horn it's self not just the compression driver. The crossover should be at 1.2Khz for a 2445 2" compression driver and 2380a horn. The problem is the small screw on type 1" horns used in bass cabinets tend to be only suitable...

Well I can't find an NTC D10-11 anywhere on planet earth, so are you quite sure it's not actually an NTC 10D-11. 10PCS NTC 10D-11 thermistor Thermistor High Stability | eBay Looking back at your photo's it appears you are looking for the wrong or non existent part.

Well there is a bloke from Wolverhampton called Glen, that has been known to like various orange cabs and amps including an 8X10 behind him.:-)X

Never tried it personally but a chap from the London Microphone Center swore blind that he reconed JBL K140's with Beymar cone kits.:-) PS. The geometry must have been very, very similar, still no need to reinvent the wheel.:-)X

Well the 3015LF PA Sub is a lot better outdoors than any single 10" low frequency driver. And so is the Faital's most powerful 15" PA Sub. 40Hz and below in a 10" sub gets you into the In Car Sub Market and less than 90dB SPL, the norm is to want ten inch drivers in multiples for midrange bass...

Colour schemes and rat fur aside. I have put microphones on one of the 4x10 cabs and wasn't impressed with the tone really.:-)X It doesn't appear to be braced very well and thus tends to speak its own resonance and sound boxy, beyond a certain level. The littlemark MkII amp appeared competent...

2x12" would feel so much better who ever the manufacturer, there is no replacement fo displacement as they say in drag racing.:-)X

Bulgarian speakers might be very cool. Invalid Link Removed

It would be interesting to hear the results, if it's going to be power limited by a tube amp I don't see why it wouldn't sound good and work well within the output power of a V4b For instance.:-)X

15XL1400 By Faital is a similar driver type.:-)X

Nope just mis spent my youth in marine engineering with that. It's handy that it floats and is waterproof.:-)X

Well if you are measuring directly from the loudspeaker terminals with an accurate meter with all cabinet wiring disconnected and thus not figuring in the equation, we can say for certain that you have a short circuit in your loudspeaker. As I would imagine your loudspeaker was produced in both...

Seven but that's not that I speak German, I am wondering if this PA amp has a 100Volt line system where the signal is superimposed on a DC circuit so the PA speaker has a small transformer to erase the DC component.:-)X

Does the crossover have any low pass filter components in it. Most bass cabs crossovers just leave the woofer to roll off naturally.:-)X

Well it appears that you disagree with Cenzo Townsend as well, who owns a very smart original Altec option B15 he specifically chose for his world class studio Decoy, although of course the driver in his, is the original Stepped Alnico magnet Altec 418 Series II. I have a pair of very old SVT...

I googled Rockville 10" PA speaker?. Nada Is it one of these?. Invalid Link Removed

Home made Ampeg clonish maybe.:-)X

Can't go wrong with an Eden XLT 4X10 cab if you are remotely physically fit, I have an early 8X10 version, it's been utterly awesome.:-)X

Fit a switch system that disables the fan, and if the power amp still gets hot which is unlikely into open circuit, fit another switch to disconnect the power amp rail voltage. There is no reason to have a fan to cool the power amp if you don't drive a loudspeaker load.:-)X

Too much low mid can get horribly boomy:-( so is it a real criticism or is it just your usual old git Luddite reaction to a new magnet material?. Unless you encounter stairs a tilt back and roll 8X10 is far easier to move than a pair of 4X10 cabs (Neo or otherwise) in my experience. After all...

What and then use a Kemper? unless you do that you are going to have a horrible sound when any distortion you are trying to make gets misinterpreted via the tweeter. The 12" bass driver Barefaced use is far from full range so turning the tweeter off won't help. I would make a sealed 4x12 out of...

Yes I like this Ampeg/trace Elliot demo.:-)X The old fender bassman 50 with 2X12 cab was used more as a guitar amp than a bass amp but it was still a cracking bass amp up to a certain volume.

The Altec 421a are actually one of my favorite ceramic magnet speakers and have always appeared to be very clear and bright especially in comparison with Eminence beta 15's. Are they non original cones or are they just ruined originals.:)X PS A recording of the cab and quality photos of the...

I would take it to a repair shop it's obviously consuming far more power than it should.:-)X

You are probably running your amp at quite a bit more than it's rated power, the 450 watt rating refers to the clean output. In order to light up the tweeter bulb fuse you would need to introduce quite a lot of harmonic distortion from some source, either the preamp gain stage and or power amp...

you have destroyed the original drivers cones, therefore apart from getting those Re- coned, which will replace all those damaged parts and leave you with as good as new and ought to be cheaper than buying suitable replacement loudspeakers. Then unless the speakers were damaged in a one off...

Don't worry about the amp that's the least of your worries, if you are a proper musician you will have massive angst and self doubt to contend with first.:)X

Yup! however with twice the speaker coupling it will still be louder than stand alone and I bet it won't thermal out at 4Ohms total, smashing the heavy bit on the second to last number in the set.:-)X 2 ohms is only for people with spare headroom.:-)X

Yup but that leaves the amp with enough room for another 8Ohms in parallel, IE another two by ten cab which will provide further Inherant Redundancy (see idiot proofing) to the system. He seems to need more than he's got available.:-)X

A decent quality power soak would help out, getting good power valve and transformer saturation for guitar at lower levels.:)X We would do that in the studio anyway because the output of a decent quality ribbon microphone like a Royer R121, won't be improved by sticking it in front of a cab at...

Ask your guitar player to review some good mixes of other artists in your genre. Then point out that that's the sort of drums guitar VOX balance you would like to work with. Make live single omni mic recordings to test your results.:-)X

Good Plan, a chap simply can't have too many Eden XLT 10"S.:-)X

Here is my Triamped bass rig I used to play out with when men were men and women were glad of it.:)X The 408 cab sounds very good as a sub crossed into a pair of 2206h JBL 12" @125hz and the 2445 2" drivers on 2380a constant diretivity horns in at 1.2Khz. The crossover is a JBL260DSC giving...