Balcro

Pm to OP for clarification.

Having read all the above posts it seems to me you may have a combination of weaknesses. Weakness 1. As others have said, the TC electronics form of compression is one thing and an average power-supply add up to a less than stellar sound at high volume probably regardless of the "D" class power module. Even so, 3-400 watts should good enough for most purposes. Weakness 2. In your post from about 13.13 you say you "struggle to hear the tone" and "the bass does not cut through the mix" at high volume. Well maybe you're also driving the speakers too hard as well. When driven in that state the drive units will also "compress" with increasing input power. That could be where you're losing the tone. Aside of whether you change the amp for a different class, why not try a temporary expedient. Cut the Bass. Turn up the low-mids and high-mids. Leave the treble where it is and re-try. If you need more definition turn up the high-mids a little more.

In a reply to one of my posts elsewhere, Bill Fitzmaurice used the words "keep the velocity below 18m/s within the pass-band". From that, I assume he meant the pass-band for bass generally, would be something "above" 40 / 50Hz, with most (average) bass speakers managing a flattish frequency response down to 80Hz and then declining perhaps -7dB by 40Hz. So for example, if the port velocity rises at frequencies at or below e.g 40Hz, then air-velocity wouldn't be an issue. If you're aiming to keep velocity below 17m/s then you only need to do that over the pass-band, which, with the little Faital-Pro's is about 50Hz & upwards. As you have stated that you have use of a 50/60Hz HPF, I would use the filter/graphic equaliser all the time. It pulls down the air velocity over 4m/s in the 50/60Hz region. I've seen some fairly extreme home hi-fi set-ups with curving pipes, and it may be usable in your circumstances, but in doing that you need to make the enclosure bigger to accomodate the larger volume of internal pipework. As port calculations seem to be based upon the cross-sectional area x length I expect that "middle of port" is the answer. I can't comment on the use of the drainpipe or the ventilator duct, apart from to say that a right-angle will cause some turbulence. Over to Stevie on that one.

After coming across quite late to your post and playing with the various options available under winISD I've found what I think is a compromise you might care to look at, but only for an input signal of 80 watts. As Stevie has said, getting good venting with high-powered small speakers in compact lightweight enclosures is very difficult. In my opionion it's a real P.I.A. Set the volume to 11.30 litres and tuning to 64Hz (same as the Fs). Following your references to a 3:14 ratio between port height and width I went back and checked my own figures which I had calculated earlier, but they didn't match. I found that using 3.8cm x 11.6cm I could get the air velocity down to 20m/s @55Hz. Port length is down to 23cm. With the 3:14 ratio for the port, the air-velocity is 1m/s higher. Without a filter, the frequency response is down - 4.9dB @ about 55 Hz. Put in a high-pass filter set to 50Hz and the 55Hz response drops to - 7.2dB. In these circumstances I think that is for the better as it is acting at the point where the air velocity is highest. With a 150 watt input, like you, I found it impossible to achieve good air velocity figures which ever way I changed the enclosure volume. At 150 watt input there is a small dip in power handling between 80 - 115 Hz (the xmax / cone excursion figure corresponds) so I would consider limiting your input to about 110 watts. Best of luck.

I'm still open to it even at the fully ripe age of 72, but I must admit I want it to come to me. I never listen to the radio even though we have 2 digital radios. Occasionally I'll pick something up on youtube and I'll hit on say 1 track, like this for example. https://www.youtube.com/results?search_query=anouar+brahem+blue+maqams Then I'll bemoan the lake of anything new and classy. Singer-songwriters and anything vaguely M.O.R are out, boring; rap & club crap are definity out - doesn't meet my idea of music and I'm too old for swallowing chemicals to make the noises acceptable (might interfere with the statins). Where are the new class acts with well written songs? Are there new "Steve Miller" or Robert Cray" bands out there? As SimonEdward says above "well crafted music". I even enjoyed the acceptable face of electronic music way back when - anyone remember Isao Tomita "Snowflakes are Dancing" (Debussy). I've tried Spotify and as an example looked for "New Jazz". Gave up after endless utterly obscure variations on an unknown theme from a hallucinatory western. Even wacky can be fun, especially if it's done well. When "San plein pour moi" comes on as backing to a commercial we're grinning our heads off and I take to air guitar! Yes, I'm still open for accepting new stuff, but please help!!!

Replacing the drivers with bass units can work and I assume the 4x10 is a closed box and the gross internal volume of the cab is about 95 litres. The Celestion Pulse 12-200 fits quite well. The Eminence Beta 12a-2 works a little less well and may be a touch "boomier" in the low-mid bass (see coments above from "Beer of the Bass").

Guess who they've been listening to? Another way of "Making America Great Again !!"

THIS! + rigger gloves @ work.

I get a lovely tone on my Cort GB74. No complaints. have a look at the videos on youtube - https://www.youtube.com/results?search_query=ghs+precision+flats+

stringsdirect.co.uk are considered to be very reliable. They're stocking GHS. I think I bought mine from there. If it's not listed on the web-site, phone them. They can usually get hold of strings in a few days.

Wow! What a collection: 5 drivers. The K.140 is quite adaptable. BFM's post from May 2015 will give a long smooth roll-off at the bottom end. If you want more low bass, then a single K140 will still work happily in a 2cu.ft (56 litre) enclosure. So two K.140's will require 112 litres or thereabouts. Port size and length are dependent on your choice of enclosure size. For example, with 2 x K.140's in a 112litre enclosure, winISD suggests a 12.5cm square duct but only 4.5cm long. The 2123 bass /mid works in a closed box of 7 - 14 litres. Frequency response is from 80Hz to 6K, although the recommended crossover is 3K. The Altec 808 compression driver works from 500Hz - 20KHz. You'll certainly need an attenuator to match it to the bass and bass/mid. Whether you need the 2402 and the 2405 is questionable with the 808 extending to 20K. Whatever size you choose, you need to reserve 15litres for the separate midrange box, 6 litres for the internal volume taken up by the two K.140's, 1 litre for the 808 compression driver and 0.5litre for the internal space taken up by the duct.

Pauline Moran - For many years the demure but sharp Miss Lemon in the Poirot TV progs . From '65-70 played bass in a band called The She Trilogy. These days she's an astrologer.

There is no one answer. It's probably moments, events and life changes. Then the influences return at a later date. Started of with piano lessons @ six. Church choir the same year, so early influences were more classical and churchy. Was a late-comer to pop in 1962/3. Cor! Top of the Pops! Missed everything else before that. Bought 1st 7" single. Alan Price - "Simon Smith & the Amazing Dancing Bear". Voice broke. School choir - light classical and church stuff - sang in the choir stalls of St.Pauls Cathedral - Wow! You don't forget that. After '65 became deluged in the tsunami of 60's Motown/pop/rock/prog rock/reggae, so forgot about classical. Went to the "Bath Festival" in about '69 - Santana and many others. Fell asleep in a tent while Deep Purple were on. College: Listened to lots around me but never got Hendrix or Cream until the 80's. Took photos from the side of the stage during the big college music era - Hiseman's Colosseum, Yes, Curved Air etc., Davy Graham, Tom Paxton, Al Stewart, The Strawbs. Lots of weird and wonderful. Only listenable these days in very small doses. On recommendation from a lady from Ross-on-Wye, I got Mott the Hoople - that stuck for a life-time. 70's: Built a home hi-fi speaker and rediscovered classical. Found bargain LP's in Downtown Records. Kooper/Bloomfield/Stills - "SuperSession" and "Live Adventures". Late 70's - "Rumours", "Uriah Heep Live '74 and Direct Cut discs with Dave Grusin. Left a job in '76 and the leaving present was Steve Miller's Greatest Hits '74; brilliant. Then, wait for it............. Live from the NEC. Status Quo. Yeah!! Through the 80's to the noughties I bought odd CD's - just as random as before, but did discover Beethoven 6th, 7th & the Violin concerto, awesome; Saint-Saens 3rd - the Organ Symphony. Mrs B likes ballet music - so it's in with Tschaikvosky. We Watched CSI and tacked on to The Who - The post 9/11 New York concert is the best. So many choices now with youtube - Quo live @ Donnington 2014 sounds wonderful. Saint-Saens 3rd and Widor's Toccatta from St.Sulpice makes us smile. As Leonard Smalls said - I like music with cojones, well, mostly - and or having a strong melody. Certainly can't stand droning M.O.R angst - so that rules out Coldplay & Pink Floyd or singer-song-writers in general; Carole King probably an honourable exception. Don't get me started on modern pop/rap/house, it's not allowed in the house. Modern-for-the-sake-of- it Jazz gets the same rebuff. As ubit said - "Pop is probably my least favourite music as I dislike people with little talent being given a chance at stardom by being manufactured. I realise that some of these pop stars are talented too. It’s just the X factor generation I suppose that get me wound up".

Breaking in loudspeaker drivers probably started with the hi-fi fraternity way back. The purpose being to soften up the suspension parts that Phil Starr has mentioned before. After a little time - not necessarily at full bore - the suspension un-stiffens and the fundamental resonance drops 3 or 4Hz! Hey! More bass. Not really, it just gets the the driver to it's optimum more quickly. All fs ratings for loudspeakers are + or - something just because of manufacturing tolerances. My advice is treat a new speaker like a new car - run it in progressively. The same goes for new tyres. The front and rear suspensions on a speaker are analogous to engine bearings & cylinder bores.

Hello Fleabag, You did the right thing in getting some new port material. Two Beyma 10 CMV"'s in 70 litres is perfect. Using two 100mm i/d ports you need the following:- For 57Hz tuning you need a length of 13.3cm. For 56Hz tuning you need a length of 14cm. For 55Hz tuning - 14.9cm long etc,. and on and on ..... I hope you have the space behind the new drivers.

There's enough there for 120+ litres of cabinet. Enough for a 2x12 or a 1x15 and stil have some spare bits over - you'll always need spare bits for handle re-inforcement and big castors etc,. Heavy yes, but imagine Phil's project with another 12" Beyma!

Oh dear! Just checked the tiny hand-gel cleaner downstairs - it says 57.6% Ethanol ! What's that going to do to your skin? You'll dry up and crack with repeated use if you don't wash it off!

The use of that trumpet shaped tube (Monacor) won't make a significant difference to the tuning. For tuning and air velocity purposes, I believe you only count the straight horizontal length of the tube, not the extra length added by the flared ends. LIkewise, work with smaller 67mm diameter at the inner end.

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.