Balcro

These people may be your best bet - http://www.lmcaudio.co.uk/acatalog/LMC_Web_Catalogue_12__Drivers_53.html?oo=0 - they're Beyma's UK distributor. Price looks the same as Blue Aran. Balcro

[quote name='Lostfollicles' timestamp='1360244010' post='1967247'] Hey Peep's! I don't know if anyone is still following this thread but I think I may have found the manufacturer of the speaker that is fitted in the RedSub 5110 Bass Combo [url="http://www.elderaudio.com/products/Loudspeakers/LFSpeaker/2009/10LB075-L.html"]http://www.elderaudi.../10LB075-L.html[/url] I have tried to contact them but have had no response to my question: - Is the speaker in the RedSub 5110 Bass Combo one of yours? As the number on the above is very similar to the red one in the RedSub Bass Combo! I would love to know if this is the same speaker as mine has a blown :( The nearest speaker that I can find that has anywhere near the required power rating to replace it with is the Eminence Delta 10A or the more powerful Kappa Pro-10A Any thoughts anyone?? Lostfollicles [/quote] The answer to your question is almost certainly "Yes". Beta-Aivin and Elder Audio are so closely related, their address and telephone numbers are the same. For a quality alternative - look back to Post 131 on page 7. Make certain the speaker frame dimensions and the bolt/screw holes are the same spacing and circumference. Balcro

[quote name='guntherbuffalo' timestamp='1360102423' post='1964979'] Right, so when I make the enclosure If I wanted it to have a 90 litre volume, I should actually make it 97.7 litres, to compensate for the space that the driver (3.7l) and the ports (4l) will take up? [/quote] Correct. If you want to rough up the cab design just before and as you build it, then check back here and we can confirm the figures etc. Good luck. Balcro.

[quote name='guntherbuffalo' timestamp='1360078009' post='1964464'] Great. Thanks so much for your help. I will go for these ports. One further question about volume of the cab. This will be a combo. So should the entire space including that which the amp chassis fills be 90-100 litres? Or jus the box the speaker is sat in excluding the space the chassis takes up? Sorry if these are all really stupid questions!! I have just never done this before and want to get it right!! :-) Thanks again for all your help! :-) [/quote] The volume refers to just the loudspeaker enclosure. Reducing the volume down to 90 litres will have no noticeable effect on the sound. However you will be able to make small reductions in the length of the port while maintaining the tuning frequency. When you build the enclosure, account for each port tube taking up 2 litres in volume and the Faital-Pro driver taking up 3.7 litres. Balcro.

[quote name='guntherbuffalo' timestamp='1360071239' post='1964311'] Awesome! Thanks for your help! So can you adjust the port length relative to the diameter? I am just aware that these ports are very long and I am not sure how deep the cab would be yet! [/quote] Quote from the web-site [i]"Large Bass Reflex 110 Port. 110mm I.D. with 145mm dia front flange and variable over-sleeve. Length variable 160-280mm. Supplied complete with formula sheet"[/i] PS. Port length is measured from the rear of the port to the end of the flat part of the tube - ignore angled chamfers or curved trims to such a port. PPS. Proposed port length is about 9". With 3/4" baffle that means you have about 8-1/4" inside length. Balcro

[quote name='guntherbuffalo' timestamp='1360067554' post='1964219'] Right. Thanks! So some quite long thin ports would be needed! Can you buy ports or do you just make them? I heard of somebody making ports out of old plastic pipes! [/quote] I think there are a number of sources, but this looks perfect. http://www.falconacoustics.co.uk/cabinet-parts-accessories/bass-reflex-port-tubes-loudspeaker-grille-mounts-dowels-calculation-sheet/bass-reflex-port-tube-reflex-100mm.html With that 110mm internal diameter set the port length to 22.9cm. Balcro

G' morning GB, I ran the specs through winISD and it comes out just like Voxpop said. You need a box of 90-100 litres. Two ports at 102mm [u]internal[/u] diameter. The set the internal length of the ports to 19.3cm. My estimate is that the Hartke Transporter 115 has an internal volume of 100-105 litres, so could be a good fall-back option. Balcro

Before you jump in with both feet and go through the ceiling we need to know some dimensions. 1. The internal dimensions of the speaker cabinet. 2. Any cross-braces inside the cabinet. 3. If it has a port or more than one, what is the internal diameter of the port(s) and their internal length. Give us those figures and we can work it out and give you a yeah, neigh or maybe answer. Balcro

[quote name='yorick' timestamp='1359108091' post='1949891'] Acoustic 361, with the 360 preamp/head [/quote] Monster! So big, NASA measures thunder in Units of Acoustic.

[quote name='51m0n' timestamp='1358426080' post='1938861'] Isnt that Silddx on bass?? [/quote] Yes, that's him. I knew I'd seen that hat somewhere.

[quote name='spike' timestamp='1358368528' post='1938062'] I like Noel's hat [/quote] Noel's hat is still in circulation, but after so much washing over the years it's a quite bleached and has shrunk to 2 sizes smaller. I wonder where I saw it recently......mmm? It's round here somewhere........................ Thanks for the post.

As a fellow 5-15 user That's an intriguing idea, but I won't be doing it anytime soon, as mine is not gigged. I don't think you can overcome the sheer awkwardness of the box shape other than by putting it on one of those fold-up aluminium trolleys. That's what i did. Over a few stairs and a roughish road surface it's not bad for the odd occasion, but up and down a long flight of stairs it's no regular solution. However, if you remove the amp you have a usable flat surface on which to mount the 2x10. Oh, two other things: line the interior walls of the 5-15 with absorbent speaker foam and use the mains socket slot-apeture on the cabinet to fit a jack-plug socket. Minimal exterior damage. Balcro

No problem. We all make typo's. I left out a "put". Happy Christmas. Balcro.

[quote name='lastnotleast' timestamp='1356364097' post='1909553'] Bacro, it remains to be seen how reliable this amp head is and I am concerned enough about it to feel the need for a backup. One of the light weights would be ideal but I also want more power/headroom and could move the Acoustic B200H to the backup position. Acoustic B115 cabs are rated at 250 watts (@ 8 ohms I presume) . What would be the maximum safe wattage amp head I could use with (2) cabs operating @ 4 ohms? Connecting (2) 8 ohm cabs allows the amp to operate at 4 ohms but how is the amp wattage distributed to each cab? Are the both getting the full wattage of the head? [/quote] The maximum safe working wattage for an amp is a hotly debated subject, but in practice depends upon how the whole rig is used. Acoustic's amp and cab ratings are not helpful, as the speakers seem to be rated at 8 ohms and the amps into 4 ohms. However that remains to be verified. If you put your two B115's together, you will have (nominally) 4-500w of power handling capacity. You could run the B200H into this combination and with the two speaker outlets on the rear, the amplifier is working into a 4ohm load, where it can deliver 200watts. As both speakers are 8 ohms, they will receive equal watts. This will be quite loud, but you may have to turn the amp up to be [u]very loud[/u]. With a 500 or 600 watt amp also fitted with two speaker outlets, the same volume/loudness will be achievable without having to the volume control up quite as much, and you will have some headroom left in the amp. So you have two rigs with different amps and both are working within the limits of the amps and speakers. Small amp = limited headroom; large amp = greater headroom. There is a lot of flexibility about maximum wattage. What shouldn't be flexible is your discretion. If you turn the volume control to 11 and the rig makes an awful rough distorting noise, then turn it down!! You can damage either the speakers, the amp or both in any combination of amp power.

[quote name='lastnotleast' timestamp='1356183422' post='1907715'] Badges? Badges? We don't need no stinking badges! You are correct Mr. F. but the same could be said for any of the familiar brands from my youth such as [i][b]Fender[/b][/i]. The Acoustic name only contributed slight (albeit falsely) to my decision to purchase it. The main reason was price tag. However, I am not disappointed in the leaset. My bass is a Yamaha BBN5 for which I paid $100.00 US and I am not disappointed with it either. Someday I will upgrade but perhaps my ability should improve first. [/quote] The design heritage you refer to is only external and cosmetic (blue panels and striping) where "Acoustic" is sold by "Guitar Center". As Mr Foxen says, it's a combination of badge and design rights which were bought from the entrails of the old "Acoustic Amplification" company. Never mind, if you like it, it sounds good and is reliable, that's great. Enjoy many happy hours perfecting your technique. Balcro

It started for me with Down Down. Then the fabulous sound they had at the NEC. Can't beat Caroline, "Whatever you Want" and "Something 'bout you Baby I like". Even at the tricky Cambridge Corn Exchange they were huge and the sound was brilliant. Balcro.

[quote name='fleabag' timestamp='1355065166' post='1893539'] Hi Balco W = 24 1/2" H = 26 1/2 " D = 19 3/4" ( as stated, outside measurements ) Yes, the baffle is mounted around 25mm back, and 18mm is probably a more accurate figure for the cab panel thickness [/quote] I've re-checked the calcs and now get 163.85litres. If you knock off 3.85 for the volume occupied by the driver itself and intruding handle frames then it's bang on 160 litres. Definitely doable. Further to that, I'll wait to see what Phil Starr has to say as he's probably much further down the road with the winISD calculator. Balcro.

Hello fleabag, I agree with your original maths for the external dimensions. I presume the figures you quote are in the format of width x height x depth? When working out the volume, I have assumed the front baffle is recessed into box by about 20mm and the walls of the box are 18mm ply. On that basis, my roughish calculations give an internal volume (accounting for the volume of the port tube) of about 166 litres. So maybe a little over the recommended size for those speakers, but no great problem in itself. Please confirm the W x H x D format or otherwise. Cheers. Balcro.

I must agree. A beautiful tone and sustain. It sounds like an electric and an acoustic all within a few notes. Balcro.

[i][b]Voxpop: "This is exactly the sound of my cab, very old school with a big hump around 100hz. It's not bad at producing a good stage sound but sometimes the hump can interfere with the room, that why I block up the holes / ports."[/b][/i] By sticking the foam in the hole you may have created a happy accident that cleans up the sound. Some early audio pioneers did the same in the fifties. The result is a restricted "port" through which the speaker breathes. Basically the restriction smoothed out the hump/boost in the response linked to an ordinary port (with a tube) and theoretically gave you a little more extended bass. Balcro.

[quote name='voxpop' timestamp='1353316061' post='1873435'] I have a cab the contains a Celestion BL15-400X driver. The cab has two 7cm holes cut into the front of the cab. To my ears it sounds better with the holes blocked with foam. It gets tighter and more dynamic. Why cut the holes into the front as it is clearly not tuned to any frequency as there is no tubes behind them. Seems to me it's a crazy design, or maybe there is no design or thought put into it. Just put a driver into a box, cut to holes and charge a fortune. [/quote] Has the foam been stuffed into the holes or has a piece of foam been properly cut to fit and set into the hole? Balcro.

[quote name='apa' timestamp='1349442689' post='1826396'] They dont fit I bought some and they are about 1/2" to 1" too short for my 38 1/2" needs. A [/quote] This is really annoying isn't it. So it looks like jaydentaku's recommendation is the best off-the-shelf option, apart from a custom length string. By the way have you seen walbassist's veilette on youtube. Beautiful bass. http://www.youtube.com/watch?v=--yDD_5erxs Balcro.

With his colleague Richard Small he made a huge contribution to audio engineering physics. As long as moving coil loudspeakers exist, there will be Thiele/Small parameters. Formal honours richly deserved. RIP. Balcro.

G' morning guys, I came across this address last night - http://www.rotosound.com/string_guide.php It explains for me the meaning of "speaking length" and scale length. There seems to be an all round limited range of very long strings, but presumably Rotosound do something in "extra long scale". D'addario do half-rounds in "Super long scale" which also seem to fit the bill. GHS do Precision Flats suitable for a 36" scale length but don't confirm that this would translate into a speaking length of 38.5", as per the Rotosound example. Balcro.

This is beginning to ring the odd bell. See also the current thread about EXL Reds in "Miscellaneous Equipment & Accessories". If I remember correctly, with d'Addario you have to buy the [u]extra long scale[/u] strings to work on many basses. That should prevent the taper section from resting on the nut. Their scale measurements aren't in line many other manufacturers. Check with their web-site. Balcro.