Balcro

OP What Woodwind said. + Paranoia depends on your circumstances. In this household - 2 potentially vulnerable people - even letters, newspapers & food deliveries are put in the back garden in the sunshine (chilled & frozen excepted of course). I seem to remember that bacteria & viruses are broken down / killed by ultra-violet light, but it's not instant. Cardboard is washed and anti-bac'd. Carrier bags are disposed of to waste bag in the back garden. When things are unpacked, everything is either washed & or "wiped". Thank goodness it's been really dry here for many weeks. If you have access to a sunny place, take advantage and still wash and anti-bac everything. If you can't get anti-bac wipes or sprays, use alcohol in some form; Vodka's good. Even cleans LP's / vinyl. Wash hands, wash door handles, wash keys!

Hi Jus Lukin, Sorry, my mistake 😧 . With only two drivers it has to be as you say; wire in series for 16 Ohms per cabinet.

A rough and ready modelling for two S2012's would suggest an internal volume of the new 2x12 cab at about 80 / 85 litres. I don't think there will be a big difference in overall size for two 2x12's compared with one 4x12. Received wisdom is that for best dispersion it's best to stack one 2x12 on top of another, but stability and the width of the 1960 may dictate otherwise. Consider the Resitance (Ohms) rating of the individual Basslites. Probably each one is 8 Ohm. If your 1960 has 2 parallel & switchable jack speaker outlets then you should wire each 2x12 in "Series/Parallel" configuration to give them an 8 Ohm rating and a theoretical power handling of 300w. With two 2x12's wired up, move the switch to the 4 Ohm impedance setting as per the manual.

Midnight Lady by Mott the Hoople. Various recordings out there. Speed increases as the track plays - could be deliberate or maybe "Buffin" had a very good night? The Japanese cover group if you come across them, are interesting but don't get boogie. Wow! I must like Boogie - The Georgia Sattelites - good call peteb - Battleship Chains for me.

For the uninitiated like me - what's a dUg?

Thanks White Cloud, I will need to read half your book just to get over the stress of downloading & installing the Amazon AppStore app 🤬, the Kindle for Android app 😠, followed by security this & that 😭 and finally your book 😌. .....................and finally 😷 this seems appropriate.

It's been said before and no doubt it will be again - when you hit a low E, the main part of the sound that is both produced & what you hear is the Second Harmonic, i.e 82Hz. The fundamental down at 41Hz is small fraction of the total output. In your graphs that is -8dB down. If you have to relate that to any one factor, then, when running winISD & noting your input wattage, look at the cone excursion graph to where 41 crosses the line. In your third graph xmax is exceeded at approx 44Hz. It's not a problem; there's not a lot of sound energy down there and that sort of figure for bass speakers is very common.. The area in blue just exceed the "usefull for bass" overall frequency response on the Lavoce web-site. If the manufacturer says the frequency range is 55 - 3K then even by their published graph in this case it ranges from about 80dB @ 50Hz to to 100dB @ 3K; so it's + or - 10! See the penultimate sentence in Phil's second paragraph ( approx 10am post). The elevated area of frequency response (green) is typical of many loudspeakers. It might help to "cut through" in a mix of instruments but the cone is ceasing to behave like a stiff cone and is starting to flex & bend so the sound produced will have more distortion & roughness. As for ports, placement and length become a problem usually the smaller the volume of the cabinet. If you have a rear port then if possble, keep the speaker cab a small distance away from the wall at the back; perhaps 4 - 6 inches.

A simple explanation from 20 hours ago? --------- "In 1979 I went with a friend to The Nashville Rooms in West Kensington to score some dope. William & I were hanging around the main bar, which was rapidly filling up with a bizarre assortments of mods, rockers, punks and new romantics ... these were people you never saw in one place unless something was kicking off between them. Will had the self-preservation instincts of a lemming and flagged down a passing skinhead to ask what was going on. "It's a great new band called Madness" he shouted. Will and I looked at each other, said "nope, me neither", and we went off to find our dealer." H J.

I hope I'm as involved as guys from that generation. Once a week I volunteer to teach general computing / internet etc., to old folks. There's one guy there, 94 & very deaf, who last year was trying Audacity and has now switched to learning Excel despite macular degeneration.

Your task in evaluating what's needed vis a vis 10 or 12, (reference to BFM's post on Wednesday 19.20) is made all the more difficult by the really poor "specifications" listed on theTrickfish web-site. The TF112 is quoted as handling 300w peak. Does that mean it's only 150w RMS or even as low as 75w RMS!! Confusing frequency response shown as 35Hz - 16K listed alongside mention of a 12" neo custom speaker from Eminence; that range is for a combined 12" bass & compression driver. Plus or minus how much? It doesn't say. Probably + or -12 or greater and the compression driver is quoted as extending to 20K!! There's no statement of general efficiency so you have no clue as to how loud it will go! There are some good things built-in such as Peak Protection, HF attenuation, and a sophisticated EQ, but overall the specification hides more than it reveals. A specification written by the marketing side of the business. The half size 0.5 Bullhead amp is differently described as having "continuous power" while your 1K Bullhead has "peak power". These descriptions are again deceptive and in Europe they are misleading. I would advise you to e-mail Trickfish and ask for the output power rating for the 1K Bullhead in wattage units AES (Audio Engineering Society based in New York) or the wattage units RMS at the lowest level of distortion. Likewise, for the power handling of the TF112 - AES or RMS. Additionally, request a statement of efficiency such as 96dB @ 1W @ 1m. If weight is more an issue than bass volume, then you need to get a sack barrow / trolley preferably with pneumatic tyres. The models with 3 rotating sets wheels for going up & down stairs could be beneficial.

Did the 2x8 section stop working abruptly or did you hear any rough noises before it stopped for good? If it just quietly failed, then you need to check the wiring from the input socket and on via the crossover (probably on the reverse side of the rear connection panel) through to the 2x8 section. Loose wires or broken connections/solder joints. Possibly a component failure on the crossover. If you heard rough noises and or there is a scraping roughness when you push the 8" cones in & out, then you may have more damage then dodgy connections. I'm sure there'll be more contributors later with more expertise than me, but as a start it's "get your screwdrivers out time". PS. CHANGE YOUR FORUM NAME PRONTO. YOU'RE IN THE PUBLIC OPEN SPACE BEYOND BASSCHAT SO YOUR E-MAIL IS VISIBLE IN ANY SEARCH FOR "PEAVEY". MODS.

Jakester, For the benefit of the community, let us know the name of the seller and category of goods you initially bought. Then we can all avoid them in future.

Hi acidbass, If you haven't already bought the Eminence then I think you ought to look at this 10" from Beyma. It looks to be a bargain. https://www.bluearan.co.uk/index.php?product=Beyma_10WRS300_10_inch_300W_8_Ohm_Loudspeaker_Driver&id=BMA10WRS300

Help is at Hand !!! Go ahead and buy it / them ...... Then sell it on to me for a 90% discount. That way both sides of your brain will be back in equilibrium. You bought it but you didn't. I'll be happy, you'll be happy and the repetitive posting will cease. Light up a cigar and relax ......... your finances will be so much healthier. See; it feels better already, doesn't it!

Just get a damn good trolley with pneumatic tyres. The smile on your face when start to play will banish all sense of pain in the back. Enjoy.

Try here - https://celestion.com/speakerworld/dr-decibel/ CLICK HERE and ask the "doctor" a question. Just copy & paste your basschat post into the box.

First of all, consider the need for an entrance lobby, if possible with the gap between the sets of doors set as far apart as is practical. The walls to this lobby should be lined with a suitable sound absorbent plaster board that meets the Fire Officers recommendations for use in a "means of escape route". Is there another door to act as "means of escape"? As for the walls it's battens up, probably 2 x 2. Fill the wall gap between the battens with 12mm fibreboard. Across the battens you need sound absorbent plaster board such as this:- https://www.insulationsuperstore.co.uk/product/british-gypsum-gyproc-soundbloc-with-tapered-edge-24m-x-12m-x-15mm.html or this https://www.insulationsuperstore.co.uk/product/knauf-soundshield-plus-plasterboard-tapered-edge-24m-x-12m-x-15mm.html Then seal up the gaps at the edge of walls & ceilings with a sound absorbent sealant. Windows? Extract fans? If you want or need a design for a sound absorber to a fan, it's basically an acoustic labyrinth. A long wooden box with a fold inside and lined with acoustic absorbent foam. The longer the better. Good for middle & upper frequencies, less good for bass, but better than a hole in wall.

The Celestion should not be written off, it's a perfectly adequate driver and you're questions are not stupid. If you're happy to go ahead and build a box and cut some holes in the panels then Chienmortbb and I can give you the dimensions for the box and the ports. As has been said before elsewhere, designing a speaker is matter of endless compromise. For example, reduce the size/internal volume of the box will cause the sound response to increase in the low-mid bass, make the box too big and overall power handling suffers. Make the box too small and the optimum port size can change to something impractical, and on and on etc,. In this case I would advise you to make a box to Phil's basic dimensions but extend the top, bottom & side panels so that they are 25mm deeper, back to front. So the panel dimensions should be: Top & bottom: - 374 x 315mm Sides: - 450 x 315mm Front & back: - 450 x 350mm. That will give you a gross internal volume of 41.1 litres. One 4" / 100mm port should suffice. Chienmortbb will probably comment later.

Hello J Mac, The short answer is yes; it will work. Bear in mind that you will have to change the port sizes from Phil's original, as that was specifically designed to suit the Beyma driver. Don't worry about that. I & several others can do the calcs needed. In a 30 litre cab the Celestion will produce a slightly warm sounding bass, but with reduced bass output in the low bass below 100Hz. If your project is a get-you-going sort of idea and the special price is important then go for it. Phil has said elsewhere that the cab dimensions result in a volume over 30 litres, to account for the space taken up by the Beyma and it's ports. Going by his dimensions of 350 x 450 x 236mm internal, you get just over 37 litres. Once a 12" driver is installed and the ports fitted that will result in a net volume of about 33 litres. If the Celestion from a fellow Basschatter doesn't work out, then there is an alternative in the Fane Sovereign 12 300 @ £70 from bluearan.co.uk. Chienmortbb should be along later with some details.

Dave Grusin's 5 Original Albums box set. Bargain. Cost about £12.50 That classic STAX above looks interesting.

From your description it sounds like you have a Marshall 1553. A bit of a strange hybrid. It has even been asserted that the drive units are really for guitar and not bass. If you wish to persevere with it, contact Celestion and or Marshall, but the cost could be startling! Good luck.

Ross always comes out with hype like that. I wonder why? The cynic says there's also a chance Ross & his guests have the same management and he owns/controls the format of the show, so it's a circular benefit. Notice how many of his guests make repeat appearnces @ 12-18 month intervals.

The Celestion looks the best of those initial choices. That upper peak will not be audible as a full-on tone, but it might give a crisp edge / definition to the middle & upper bass notes. Don't concern yourself too much with the fundamentals down around 40 - 50Hz as what you hear is really the 1st harmonic at 82Hz. The Pulse 12 works comfortably in an enclosure of about 40 litres and the Basslite 10 likewise in a box as small as 28 litres. Bill's suggestion to try some more 12's is definitely worth a punt. For a 200 watt input, the Eminence Delta-Pro 12-450A will touch 123dB and the robust Beyma SM 112/N will exceed 121dB for a 200 watt input. The former costs £106 and the latter £110. With these latter two, they are so efficient you may not need to ever consider changing them. PS. The Beyma SM212 mentioned above will manage 121dB for £96. You pays your money and you makes your choice!

Hello adriansmith247, You have many variables in that question so it would help us if you could give some more information about your friend's existing set-up. What's the wattage output from the Polytone amp? What power handling is required for the Bass cab? What's the budget? The GK MB 150 1x12 combo you mention has a weight of 12 Kg or about 26lbs, so I guess you're looking for something less than that. Small major-brand bass cabs coming in under 12 Kgs are rare. The EDEN EX112 @gear4music comes close but still weighs 30lbs, so as you say, you're looking at brands like RedSub / SubZero. If your friend wants to continue to use his Polytone amp then there is sideways option open to him. That's to send the signal from the Polytone to the Effects Return socket on a combo. Only a few light & cheap combo's can do this but their speaker power handling is usually limited to about 30w input. For example: - https://www.gear4music.com/Guitar-and-Bass/RedSub-BA-30-30W-Bass-Amplifier/2KCW This weigh in at 11Kg. The SubZero GC 112, a guitar cab & looks adequate, can be daisy chained, but no weight is specified. The SubZero G 110 with a Celestion speaker is another guitar cab; is good for 30 watts & weighs 10Kg. Otherwise at a price there's the Gallien Krueger 112 MBX extension loudspeaker with aluminium chassis. Only 16 lbs, but £300!