Balcro

Maybe your original post was confusing. Saying are you in favour or not is probably asking the wrong question. Most people on here these days, would expect you to have a ported enclosure. That's why both alexclaber and I asked you "what's the purpose of a adding a hole?" I think this thread has established that whether there's a hole or a port, a tuned frequency exists, whether it's useful or not. The usual response to questons such as yours is to recommend the use of winISD software. Use that and you can get the tuning, frequency response and power handling sorted out in a few minutes. Because of tools such as this you can achieve an optimium setting and you might avoid damaging drive units. In other words it would solve the first two sentences of your post #26. Take a look at my post #18. The diameter of a 100mm drain-ppe is very close to one of the standard port diameter settings in winISD. It's also cheap and adaptable. The apparently odd-ball device in the link is actually a serious device used in hi-fi and would prove useful if you had a closed box loudspeaker and then cut a hole in it. It lets the air out for a purpose and is an alternative to a reflex port. The research on it goes back more than fifty years. I have no idea why this sub-forum, not just this thread, that attracts such dissent, but it does. These days you half expect it, and then the protagonists veer off at a tangent. Whatever. As far as I'm aware Bill Fitzmaurice and Alex Claber are the people who know their physics. Some others will have lots of experience in the the entertainment industry and they may also know their physics, others have a passion for loudspeaker boxes. THey will have to tell you who they are. Balcro.

[quote name='ficelles' post='1322644' date='Jul 31 2011, 11:41 PM']Lets the air out. ficelles[/quote] Rule of thumb for size: sized so you can fit a 100mm plastic drain pipe in the hole. That way if you don't like the first result (just a hole in the baffle) you can try fitting a length of pipe for an alternative tuning. If you really want to look cool try one or two of these - [url="http://www.madisoundspeakerstore.com/flares/ports/vents/scan-speak-aperiodic-vent/"]http://www.madisoundspeakerstore.com/flare...aperiodic-vent/[/url] Balcro.

[quote name='ficelles' post='1320497' date='Jul 29 2011, 02:46 PM']Untuned ports i.e. just a hole... anyone in favour / not in favour? Any rule of thumb for size? ficelles[/quote] What for you is the purpose an untuned port? Balcro.

To the best of my knowledge, Councillors in themselves have no legal authority to "move you on". That would be the responsibility of something like a street-trading inspector, who would be able to inofrm you/refer to the local regulations relating to busking. The following might be of interest - [i]From the minutes of North-Somerset District Council: QUESTION NO. 3 From Councillor Crockford-Hawley To Councillor Roe, Leader of the Council [b]Weston-super-Mare Town Centre Partnership/Company[/b] (1) Would the relevant Executive Member indicate the areas of responsibility which have been vested by this Council in the Weston-super-Mare Town Centre Partnership/Company and the Town Centre Manager? (2) What financial contributions, commitments and office facilities have been granted by this Council to the Town Centre Partnership/Company and the Town Centre Manager?” Reply: “(1) Weston-super-Mare Town Centre Company (TCC) was established to promote the economic vitality of the town centre. Earlier this year, as a part of their initiative to deter illegal trading and encourage quality busking and events in and around the High Street, the TCC requested that the Council allow them to take on the responsibility of event organisation and management at three key locations - Town Square, Italian Gardens and Big Lamp Corner. The Executive Member for Economic Development agreed to a trial period (to be reviewed after twelve months) during which a number of new events and activities have taken place, culminating in the location of an ice rink on the Town Square on the run up to this Christmas. The Council (N-S DC) retains all other responsibilities for these areas and no other ‘responsibilities’ have been vested in the TCC by this Council. (2) When the TCC was originally formed, North Somerset Council provided annual grant funding (£15,000) and office accommodation at the Winter Gardens for the Town Centre Manager. This funding support finished in March 2002 but the Council continues to provide an office at the Winter Gardens. Computer, telephone and other office services are paid for by the TCC. North Somerset Council also supports the TCC with Member representation on the Board of Directors and with officer help and advice when needed.” [/i] So N. Somerset DC are the major power, but WSM Town Council is responsible for just a few local functions,i.e looking after activities on the beach. You (or a mate) could contact the Town Centre Manager and ask him for details of street trading, busking etc, and whether he can provide you with copies of the relevant rules and regulations. You might also contact North Somerset D.C and find out their attitude to street-trading/busking in WSM. They may well have on-line T's and C's. However, they may also be responsible for what's called street-trading Licences/Consents, even inside WSM. Obviously someone will have to consider the potential for "nuisance", but that proviso is found everywhere. It is possible to play with and amplifier and not cause a nuisance. Balcro.

[quote name='Bill Fitzmaurice' post='1294958' date='Jul 6 2011, 05:09 PM']Not quite. Load figures are only vast generalizations, based on the DCR of the drivers used. Even with the same nominal load rating different cabs have very different loads, even when using the same drivers, as shown here: This shows the same driver in a sealed and vented cab. A tube amp will be much happier with the lower average impedance load of the sealed cab, SS will be happier with the higher average impedance load of the vented cab. The inverse is also the case, and is likely the source of Ampeg's problem with its Micro VR SS head and sealed 2x10 cabs.[/quote] Further to your post No. #14 above:- Wooks79 has a SS power amp section to his SVT3 Pro and its operated into a vented cabinet, which displays that typical double peak impedance (red-line) plot. Therefore from your explanation, can it be assumed that amp will be reasonably comfortable under such conditions? Balcro.

Reading between the lines, I think Bill is cautiously referring to the potential for damage that may occur to the amplifier if your amp is not capable of operating into a 4 Ohm load. Therefore he has asked you for amp details. He wouldn't want to give you an unqualified recommendation on loudspeakers if your changes caused your amp to burn out If you replace the speakers, you'll need two 8 ohm drivers. When wired in parallel - which is what you probably have now - (check it anyway) you amp will see a nominal 4 ohm load. It looks like the SVT-3Pro is comfortable with that. I don't know if your other amps are the same. There's probably a reference to Ohms/Resistance in the forum wiki. Balcro.

Yes, I think Moos3h is right. I've had a bit of a dabble at this with winISD and I reckon an Eminence Kappalite 3015 (not the LF variant) will fit the bill. It's nominal overall power handling is 450 watts and it's very efficient; like LOUD. It models quite well and even showed a rising bass output below 100Hz. Smoothing that bass out is relatively simple, but see if any other respondents agree with my assessment. Didn't check the cost. Balcro.

[quote name='Mr. Foxen' post='1282914' date='Jun 26 2011, 11:59 AM']This is a ported cab, so it is about lining rather than stuffing. Although according to the maths, it is tuned so low it might as well be a sealed cab. I want basic fingery foam, I've got loads of little bits from packaging, need a big bit.[/quote] Good morning Mr Foxen, It will require a bit of maths to get value for money, but try the following 2 links to get what you want. www.wilmslow-audio.co.uk www.soundservice.co.uk Different shapes, thicknesses and sizes. Balcro.

[quote name='Jacqueslemac' post='1281502' date='Jun 24 2011, 08:51 PM']Anyone like to PM me their address?[/quote] Hi Jacqeslemac, Further to your Post #27, I PM'd BassBunny yesterday to give him the nod. Still awaiting a reply. Balcro.

[quote name='martin8708' post='1280243' date='Jun 23 2011, 10:02 PM']Great to hear a kindred spirit out there in the wilderness , again I have nothing but respect for the audio engineers who probably know squillions more about cabs + speaker design . But please give us mavericks in our woodsheds a chance . I am constantly tinkering with my cabs , stripping them down , adding bits + bobs and seeing how it effects the sound . I will never go into production , but just enjoy ''punking '' around in the woodshed . After all, you Americans did put a man on the moon using slide-rules and one of the best Harley Davidson flat track racing bikes was designed by a dentist !! I may never change lead into gold , but who knows what may happen along the way .[/quote] Maybe you do tinker with the wood, but using some good software will help no end, because it doesn't just give you the modern optimum, whatever that is/may be! The software is basically clever enough for you to even deliberately design your speakers so that they're technically Wrong and take your choice of a thousand points in-between optimum & wrong. It doesn't just show the size of the box but it can also show you how easily you might blow it up! That bit does come as a surprise. It's all good fun. Try a little science and you will save yourself a lot of wood and splinters. Enjoy. Balcro. PS. By the way it will also tell you how loud it will go. Yee Ha. After a lot of surfing I put the best figures I could find on the D140 into winISD. Put two units in that old Sun cabinet and came up with 127dBa in the " mids" (460Hz) upwards. All from 120watts input. Welcome to the deaf club.

[quote name='JimBobTTD' post='1278085' date='Jun 22 2011, 07:57 AM']The article states that he was AMONG THE FIRST, not the first. I cannot see a problem with the statement, although I have not heard of the man nor have I heard the Joe Walsh LP mentioned. The record could be the earliest with a strong fretless presence, in which case the whole thing seems fully valid. Of course, if the record is not the earliest [etc][/quote] My first and only hearing of him was as bass player to Elton John on the "Rock of the Westies" album, circa 1975. Credited with playing for Jo Walsh, Stephen Stills and "Gonner Ears"! Balcro.

Hi Bilbo, Further to your Post #79 - My remark about the students was not to argue that Yes were indulgent. I was trying to set some historical context to how I saw them and their audience at the time when the college music scene was booming. At that time, the put-down use of indulgence hadn't been thought up. They were just very new and progressive. Once the media found the need to criticise them and others as indulgent, they, the media, were probably pursuing their own agenda. See the first para to SteveK's post#84. The put-down has stuck. Balcro.

[quote name='Bilbo' post='1277301' date='Jun 21 2011, 04:50 PM']OK, I've got the a*** :lol: I keep hearing the term 'self indulgence' used whenever there is any suggestion that a musician is moving away from the groove and into the area of soloing or collective improvisation. I have heard this term since the heady days of punk when the bands I liked (Yes, Genesis etc) were dismissed by the monkey-booted, donkey-jacket wearing Philistines that surrounded me as irrelevant because of their 'self indulgence'.[/quote] Who first used the term indulgence to describe the likes of Yes? I don't know, but it was probably some journalist in the NME or Melody Maker. It's there for provocation to make the story/article run in the days when popular music lasted no more than 5 minutes. Then came progressive rock! Students liked it even if they didn't understand it musically, 'cos all their mates liked it. Non-students didn't get it so they mocked the "self-indulgers". Improvisation and technique are fine in the right place, but I do think some musicians push it to the limit, because for them it becomes part of their CV and they rise or fall by the regular demonstration of their virtuosity. Take that multi-themed Keith Jarrett video. That's the first piece of Keith Jarrett that I've found enjoyable (although I could have done without the face-pulling). Technically that wasn't a difficult piece but the usual ensemble pieces are on a different planet. You don't go to a Keith Jarrett concert to listen to old standards like "The Nightingale Sang in Berkeley Square" drifting into a film theme followed by "DannyBoy" etc...and on.... Must agree with you there [i]Beedster - "One man's self-indulgence is another man's virtuosity. It's about taste, and people have different tastes; no amount of ranting about it eloquently or otherwise will change those tastes substantially."[/i] The original critics probably had a point. When having to listen to endless repetitions and improvisation for the sake of improvisation, then I think it's fair comment, but just improvising and expanding within the context of the piece and moving towards a conclusion shows both control and the ability to entertain. As [i]Mykesbass said "and jazzers taking improvisation further off piste) where it becomes competitive, and having become competitive they are then doing it for their own personal achievement, not for the benefit of the listening public, thereby becoming self indulgent?"[/i] Balcro.

Source: - Go to stringsdirect.co.uk - and send an e-mail via "Contact us". Brite Flats are not listed on the web-site shop, so ask in the e-mail for the one's you want. I did that about 9 months ago. Strings were delivered in about 4 days. Balcro.

[quote name='Mr. Foxen' post='1274935' date='Jun 19 2011, 04:53 PM']Got a new PC and it isn't saved on it. An Greenboy's site that had it seems to be gone.[/quote] Here - It's probably best to go to the horses mouth and enter from new. Some of the buil-in files give "remarkable" results. [url="http://www.eminence.com/pdf/Kappalite_3015.pdf"]http://www.eminence.com/pdf/Kappalite_3015.pdf[/url] Balcro.

[quote name='Count Bassie' post='1275233' date='Jun 19 2011, 08:42 PM']I bought a Kappalite 3015, and with the WinISD Alpha version I got the ports to 5 1/4". My info wasn't 100% complete as far as the physical specs of the driver, so I approximated on the remaining cab volume with the inwardly protruding basket, bracing, and ports. Couldn't do every single calculation... but it sounds pretty dern good! Played out twice over the weekend, and I'm getting to know it. It's got a nice low-end punch, moves a good deal of air, and feels like it'll handle what I've got for amplification without a problem. It's new to me, and I'm still learning about what it does. I may need to add a third port if I get a stronger amp, to avoid "chuffing". But so far, so good. I sold my heavy Trace Elliot cabs, and boy is this thing light! I'd like to clone it, get another 3015, then I'll be in Piggy Heaven. Meanwhile I've got a GK 800RB and am getting an old Celestion 12 re-coned. I'll build an open-back cab for it, and will use it for a top-end to bi-amp the 800RB into... I guess I'll cross it over at around 1KHz or so. Here's the cab with the longer, pvc ports: Fun with noise![/quote] Good luck and enjoy! Balcro.

Ah, the satisfaction....

Hello Ian, You could try the following two links: - [url="http://www.wilmslow-audio.co.uk/damping-materials-28-c.asp"]http://www.wilmslow-audio.co.uk/damping-materials-28-c.asp[/url] [url="http://www.falconacoustics.co.uk/cabinet-parts-accessories/dedshete-wadding-acoustic-foam-gasket-ls35a-loudspeaker-cabinet.html"]http://www.falconacoustics.co.uk/cabinet-p...er-cabinet.html[/url]

[quote name='mattwood' post='1268482' date='Jun 14 2011, 12:03 PM']Hi all, I am new to the forum and this is my first post so sorry if it is a bit long winded. I have recently inherited an Acoustic Model 220 amp head and matching 402 2x15" speaker cab that I know little about. So far all the info I have I found here: [url="http://acoustic.homeunix.net/twiki/bin/view/Acoustic/AcousticProducts"]http://acoustic.homeunix.net/twiki/bin/vie...cousticProducts[/url] The amp will be going up for sale soon, but I would like to know anything more about the amp and cab that the above link doesn't cover that someone else might know. Unfortunately, I am not a bassist and the amp is too big for my situation at home - otherwise I'd keep it. Also, as I have no idea what it's all worth any insight into a good asking price would be most appreciated. Many Thanks[/quote] Use the above link and then click on the further link to the "Forum". Go from there. Those guys know pretty much all there is to know. As for the UK, "Bumnote" and friends will be along shortly. Balcro.

Yes. Same here. A post at 6pm seemed OK, but when I checked back just now, it had disappeared. Using Talktalk ISP and Opera browser. Balcro.

Oooh that's weird. My post at 6pm disaapeared into the ether. The rest is a repeat..... Sorry it wasn't very helphful, but it reminded me that I must get that set of Brite Flats out of the box. That video and the others in the GHS bass string series prompted me to try a set. No messing about. Thats the tone on offer. WYSIWYG. There not widely available here, but a quick e-mail to stringbusters.com and they were mine in 5 days, although not displayed on the web-site. Balcro.

Thanks for that. Really something to look forward to. Saw them at the Bath Festival back in whenever, maybe '68. They were just spot on. So here by way of an indulgence is one my favourite youtube clips. Somedays everything just works and this was one of them............ [url="http://www.youtube.com/watch?v=dLDalZ4-53g"]http://www.youtube.com/watch?v=dLDalZ4-53g[/url] Balcro.

Using WinISD v 0.50a7, I get similar basic figures to yourself. However, I suggest you go back to Etone and try to get hold of more speaker (T/S) parameters such as "Xmax", "BL" , "Sd" and confirm that the resistance as 8 Ohms. When you've got those figures, enter them into the database following the guidance on "data entry" in the help file. Re-run WinISD. Also click on the "Signal" tab and put in a realistic wattage signal to test at figures higher than 1 Watt. Good luck. Balcro.

Markstuk, Doddy and Bilbo are all correct in their descriptions. Think of it as a music writing protocol related to the key in which the music is written. Yes C# and Db are the same physical note (and so are all the other combinations of adjacent notes), but if the key changes then so does the note description on the stave. Balcro.