Balcro

It's as loud as any other 500w amp into 4ohm. By my visual calculations the gap between the feet is 17.35cm. The distance to the outside of the feet is 20.70cm.

The simple wattage figures don't necessarily translate into increased volume. The drive unit inside may be more or less efficient than another, so the the volume could be less, the same or more than any other combo. As is normal, the full 500w will only be available when the Laney is hooked up to an extension speaker. Depending upon amplifier design the stand-alone output will probably be 250 -300w. Fairly heavy yes, but very well specified at a competitive price and if it's a tilt-back even more versatile. A very mixed set of descriptions online; Laney say it's a sealed cabinet, searching for pictures shows one model with a rear-port, while others look standard and yet more say it's a kick-back. Confusing. The ported version will probably be more efficient in the low-mid bass. The 30Hz graphic slider is great idea - in the "cut" position it is, in effect, a high pass filter which will clean up the low bass & de-stress the driver unit.

On a serious note; sorry can't help it's built in my psyche, how about a "Profound" of bassists. From the phrase Basso Profundo (or Profondo), Latin for deep bass. It might be written on a score somewhere. It sounds obscure enough to be a question on "The Chase".

Cosmo's Factory was brilliant. The early productions were spot on. Fortunate Son is a classic. Of the slower songs "Have you ever Seen the Rain" is superb. Too many of the songs in the last 20 -30 years are spoiled by John Fogerty playing at 100mph & or the pitch being set too high. Watch the duo with Bruce Springsteen, arrh!! arrh!!. The Eagles: well crafted songs & great harmonies, but for me they lack magic.

PS. For the mounting information & dimensions, download the datasheet from here... https://www.beyma.com/en/products/c/low-mid-frequency/115WRS408/altavoz-15wrs400-8-oh/

Hello Bigwan. Using your supplied box measurements, my earlier suggestions didn't work out, but I think I may have found the answer. Without making any physical changes to the Laney cab and assuming that the two separate enclosures are well sealed between them, i.e 2 discrete & seperate air-tight enclosures linked together, I tried modelling the Beyma 15 WRS400 in a volume of 96.8 (gross) 94litres (net of drive unit & ports) & with two 4" ports. Well, I reckon it will do the business. You end up with a very conservative power handling of 295 watts per drive unit, that is just before xMax. System tuning is in the region of 52Hz. If port chuffing is ever audible or a problem just replace the existing ports with 100mm internal diameter drain pipe and cut to a length of 19cm This will lower the tuning to 43.5Hz & the chuffing will be gone.

Meanwhile, you can have a look at these. https://faitalpro.com/en/products/LF_Loudspeakers/product_details/index.php?id=151060110 https://www.fane-international.com/view-product/SOVEREIGN-15-600LF#tab-1

Hello Bigwan, What's the size of the the old Laney beast. Any idea of the internal volume and secondly, (couldn't find any online pics) what is the diameter and length of any ports? 15" speakers seem to need between 50 & 150 litres each to work well in a cabinet. A lot of variation. Let me know the figures.

Agreed, but in this case is looks like the OP is trying to make the best of a bad job.

According to a rough & ready winISD run-through, the SICA drive unit works best in an internal volume of 20-25litres. An an example, using winISD's net volume of 23 litres, a 4" port you'll about 19.30cm long will give you tuning of 62Hz. So make the volume about 25.50 litres and allow 2.5litres for the space occupied by the drive unit and the port. My suggestion would be to reduce the internal volume to the above size using a number of hard polystyrene packing pieces or any other solid but lightweight material.

PM to Pea Turgh.

https://www.theregister.com/2021/03/19/audacity_3/ Worth a read for changes and limitations.

This is the place to start looking:- https://www.wilmslowaudio.co.uk/speaker-kits-1-c.asp

If you want the real McCoy and a chance of picking up a schematic for the 126 Bass Combo then start looking here - https://www.tapatalk.com/groups/unofficialacousticcontrolcorpmessageboard/ Today, the names for "Acoustic" are confusing, but as Bassman Paul & stereoplayer have said the "acousticamplificationcompany" is owned by the Guitar Center. The link above is for the enthusiasts, particularly a man named George Grexa who builds the stuff which is as close as possible to the original. See the words Acoustic USA and GPG.

Contact "dr.decibel" at Celestion and give him the long code on the side of the magnet, beginning 070 K 4670 / 09. 15" cast-frame etc. They will be able to tell you the identity of the speaker & probably some of the specification, quite quickly. https@//celestion.com/contact/

In general, there isn't much choice for 6 / 6.5 inch drivers giving a good bass response. Add to that your diverse needs - needing a solution for double bass as well - and the search results are meagre. As Phil Starr mentioned above, there is the FANE Sovereign 6 100. Bill Fitzmaurice (in his post from about an hour ago) makes the critical point; what have you got now? I'll add 2 more; what's the internal volume of the box? My guess is about 7-10 litres. Secondly, are there any ports to the box. If we know that, then there may be an alternative, but don't expect "agedhorse's" comments not to ring true.

Help required to find an old song. One for those with an encylopaedic knowledge of the early sixties. A Beatles cover, I think it was "Money" by Sounds Incorporated. Was it was on the green Columbia label? Please search the brain archives.

I'm sticking with CD's. I bought 7 overall for Christmas, of which 5 were for Mrs B and two for both of us. Three of the 7 were classical and the other 2 were past rock-pop classics. Music-Magpie was good for 4 of the discs. No point in having a good hi-fi if you don't feed it with quality. If we then want to rip to mp3 for the car then it's all possible; the car also still has a CD/mp3 player & a wacky SD card slot. Old laptop & this new desktop both with DVD/re-writers. Vinyl was the quality of it's time, that time has now past. Sure, mp3's, Spotify and assorted download sources are OK for general listening, as has been said, but when I want to bathe in the best classical or jazz then only CD's do the job. Vinyl buys are reserved for feeding to my grandson on his birthday & Christmas.

Lownote12 is daisy chaining his two 8 Ohm speakers. Series? For the impedancely challenged like me, what is the resulting impedance shown to amp? Is the input power equally distributed across the 6 drivers? What is the overall power handling of the speaker pair?

You could do worse than here - https://www.woodbrass.com/en-gb/

That calls for another video and test. Nice video work.

The Ibanez. The Vox does not even have an aux-in socket for playing along to your favourite music tracks from an external sound source such as a mobile phone or mp3 player. Both products are just OK for quiet "bedroom" practice.

It looks possible that the 121-4 speakers in Fryer's & Paul S's were not the original, but they could be a correct replacement (3 brown cones & 1 black?). Couldn't find any useful link to the model 121-4 or the code 96000416. However, judging by this link - https://assets.peavey.com/category/manuals/711_17511.pdf a Peavey "Sheffield" TXF 1035 was the speaker fitted in various TVX's & the 8 ohm TVF. This link - https://www.hifisoundconnection.com/Peavey-Sheffield-1035-Replacement-8-Ohm-Sub-10-Speaker-for-410TX-210TX-810TX-Cabinet-PVI-100-Mic-PEAVEY-PACKAGE-367 gives you the T/S parameters for the 1035. Peavey Electronics UK Service agent is /was in Corby @ 01536 461234 or customer service @ peavey.com & they may be able to help you with matching up the 121-4 & reference 96000416 (presumably for all 4 drive-units) to the TXF 1035 then you will have accurate info for matching fryers' speakers to a suitable cab. More on that another time. If you put the TXF 1035 parameters into cabinet matching software, the results come out very similar to Lozz's suggestion of the Eminence Beta's and Phil Starr's graph (black) of the "bass response in a 20L cab".

woodbrass.com (French) appear to be similar to Thomann. Unless otherwise stated, articles seem to have a 3 year guarantee and there is a 30 day returns "condition of business". I bought my bass from them some years ago. It arrived well packed & was delivered in about 5 days.

If you calculate upon a 100W input, nothing changes except the pressure within the port as I said previously. Remember Phil's comment about squeezing a balloon. The up-side:- if you change the smaller vent dimension to 3.8cm you are given a port length of 19.26cm i.e 19.3cm. You will need an air gap beyond the end of the port. If it's possible, make it equal to at least 3.8cm. The down-side:- the air velocity calculation shows a rise to 18m/s at 63Hz. Balloon squeezed, but still within recommended bounds.