Mr. Foxen

Have you had the transformers made so they heater winding can supply slightly more current to swap in KT88 if you fancy?

Congrats on getting the point of the statement.

[quote name='0175westwood29' timestamp='1366220373' post='2049828'] will i not be sending 500w to each cab from my head? so it will be equal, dnt wanna have the amp running with a weird numbered impedance aswell. any reason for the sp dislike? andy [/quote] 500w to 2 10s and 500w to 4 10s, which means some tens getting 250w each, and some getting 125w each. Effectively means your 4x10 is stuck with half power whilst your 2x10 is at max, and additionally that means the sound of the 2x10 dying will be covered by the output of the 4x10 so you won't know to turn down as clearly. Problem with the SP cabs is you pay for and feed power twice as many drivers as are making sound. The rear two in an isobaric config are performing the function that the back of the cones of the drivers in a standard cab would. So you get the same max output as a 2x10, and need twice as much power to get there. The upsides are being able to write bigger numbers on the spec sheet.

[quote name='0175westwood29' timestamp='1366217548' post='2049770'] eh? im thinking of putting this atop my 410 eventually, or maybe grabbing a sp410 as they appear to have stopped making them? only the sp212 on the site now? just looking for view on the 210 looks to be in the same size cab as the 115? andy [/quote] To match up a 2x10 and a 4x10, you need the 2x10 to have double the impedance of the 4x10, so a 8 ohm 4x10 and a 16ohm 2x10. That way the power distrivution is equal. An SP cab is definitely a bad plan to mix with a standard 4x10. Its a bad plan all on its own.

Same speakers as the 4x10, and thus double impedance? That is what you need to aim for to make the 6x10 right.

The point is all about damping of speakers. It is already done by the speaker, so the damping properties of an amp are not relevant. Hence damping factor is not a relevant consideration when it comes sound coming from speakers. If, as you appear to want, you ignore the speaker, then it also doesn't matter, since without the speaker, there is no sound to present concerns with regards to damping factor. Same way I'll cheerfully assert that the colour of an amp has no relevance to its sound properties due to the total lack of references to the effect of an amplfiier's colour in any acoustic engineering texts.

[quote name='Beer of the Bass' timestamp='1366160162' post='2049170'] On the width thing - I had a Carlsbro 100 watt PA which was 50cm wide - the same as a Super 12. Plenty loud for my needs too - I never had to turn it up to the point where it started to sound dirty at a gig, although my band may be less loud than some as our guitarists both use 1x12" valve combos. [/quote] I have one of these in my to do pile actually. PM if interested and I can prioritise it.

[quote name='stevie' timestamp='1366192467' post='2049350'] That article was published in 2000, forty years after valve technology went the way of the dodo for most people. He wasn't talking about valve amps. [/quote] Correct, it is an article about speakers, and how damping factor is irrelevant, so being a valve amplifier is thus irrelevant. That is the whole point.

Bit of meths on some kitchen roll will clean that scribble off.

Modern speakers are plenty damped all on their own. Modern like not 1930s. If damping factor was an issue, cabs would sound significantly different depending on if they are wired in series or parallel. [url="http://www.cartchunk.org/audiotopics/SeriesSpeaker.pdf"]http://www.cartchunk...riesSpeaker.pdf[/url] Some barefaced specific stuff: http://basschat.co.uk/topic/13344-old-barefaced-news-see-our-website-for-the-latest-news/page__st__80__p__389884#entry389884

[quote name='brensabre79' timestamp='1366127093' post='2048709'] Oli, how do you think a 120 would stack up with my Super 12? Do you think it could give my Genz the fear? Also, does anyone make one that is narrower? Those Marshall style heads are too wide for my S12 [/quote] Try one. A good one. Like one I rebuilt, not a clapped out one. I have actually run out for the moment, but got some incoming to work on. The Slave 120 power amp is Super 15 width, won't get narrower than that. Could rebox a 120 to be a bit narrower. No massive point though, just deal with funny looking rig.

[quote name='matybigfro' timestamp='1366099625' post='2048189'] Mr Foxen I may have to pop my head into your den when we're next at the Studio? [/quote] Shoot me a PM when abouts is good, I'm on Greenbank Road.

[quote name='brensabre79' timestamp='1366113812' post='2048413'] Thanks Pow, The SC PA head I was going through in the studio was a 120, and if it was 'bouncing' like that (which thanks to this thread I now know is 'sagging' at max output) at practice volume it's not gonna cut it at a big gig. I'm going to be lucky to find a SC200 head aren't I? [/quote] With loud enough cab, the 120 is definitely giggable loud, but might depend on the power supply being up to snuff, most of them have old degrading caps that don't give the power they used to, all the ones I've used/sold have rebuilt power supplies, so not an issue. The Tame use a 120 with a Hartke 8x10 for bass, I've gigged one with a Barefaced super 15. [quote name='Pow_22' timestamp='1366112676' post='2048394'] I had a SC120 and would say it wasnt loud enough for me. Tried through various combinations of cabs but against two guitards and a reasonably loud drummer it just turned to a fuzzy mush. Lovely tone at quieter volumes tho just didnt have the balls at louder levels. Ive always wanted to try a SC200 [/quote] Sounds like power supply needs sorting. Te amount of mids you can get from the active eq should knife through a mix if raw volume isn't happening.

My house is 3 streets from that studio, so you can come a try a wide variety of amps without going very far. Who are you recording with? Everyone there is called Jim. Recorded the Caricatures album there, didn't give the Ampeg a try, seemed a bit small for purpose.

[quote name='0175westwood29' timestamp='1366060800' post='2047981'] you tried the orange bass terror? andy [/quote] Doesn't do it. Good amp, but its very preamp sound.

Good thing a complete retube is almost never necessary.

http://www.gumtree.com/p/for-sale/vintage-carlsbro-reverb-and-60s-wahwah--job-lotproject/1015436752#gallery-item-full-2

Loud cab means don't need much power, and not much power means not much weight in your valve amp.

100w is plenty for the bass, if an amp is flubbing out, it is a sign the power supply caps need replacing. Never seen a T&B with partridge transformers, some had one Partridge looking one, don't recall the sticker though.

Some Selmer T&B 100s have a design quirk that makes them disagrees with modern valves and go into oscillation when pushed. Should be easy fix for tech who is aware of it. Getting on quite well with 50w Selmer heads and bass. Also, any amp of that age will benefit from a recap, otherwise they'll be a bit gutless sounding/noisy/exploding.

Spoombung

[URL=http://s17.photobucket.com/user/Incarante/media/DSCF1464_zpsd4dbd652.jpg.html][IMG]http://i17.photobucket.com/albums/b69/Incarante/DSCF1464_zpsd4dbd652.jpg[/IMG][/URL]

Problem isn't that the head is too powerful. Problem comes when you can't hear the 15 farting out because the 2x10 is louder and still comfortable, so you don't turn down and the 15 dies. Had it happen with that combo of speakers before. Always better to have matching cabs than mixed ones, so nothing is out of balance. Two different cabs have different impedance curves so at some frequencies, power won't be distributed evenly, and that frequency can be one where the speaker copes badly with the power.